./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe030_power.oepc_pso.oepc_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe030_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe030_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/safe030_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-76401ed-m [2024-06-20 17:28:14,045 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 17:28:14,105 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 17:28:14,110 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 17:28:14,111 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 17:28:14,131 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 17:28:14,131 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 17:28:14,132 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 17:28:14,138 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 17:28:14,142 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 17:28:14,142 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 17:28:14,142 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 17:28:14,143 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 17:28:14,144 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 17:28:14,145 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 17:28:14,145 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 17:28:14,145 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 17:28:14,145 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 17:28:14,145 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 17:28:14,145 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 17:28:14,145 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 17:28:14,146 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 17:28:14,146 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 17:28:14,146 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 17:28:14,146 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 17:28:14,146 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 17:28:14,147 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 17:28:14,147 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 17:28:14,147 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 17:28:14,147 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 17:28:14,148 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 17:28:14,148 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 17:28:14,148 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 17:28:14,149 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 17:28:14,149 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 17:28:14,149 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 17:28:14,149 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 17:28:14,149 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 17:28:14,149 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 17:28:14,149 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 17:28:14,149 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 17:28:14,150 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 17:28:14,150 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 17:28:14,150 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 17:28:14,340 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 17:28:14,358 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 17:28:14,360 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 17:28:14,360 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 17:28:14,361 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 17:28:14,362 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe030_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-20 17:28:14,531 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 17:28:14,531 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 17:28:14,532 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe030_power.oepc_pso.oepc_rmo.oepc.i [2024-06-20 17:28:15,594 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 17:28:15,824 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 17:28:15,824 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe030_power.oepc_pso.oepc_rmo.oepc.i [2024-06-20 17:28:15,841 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63483ed33/b71b62687d46441896f7fc3e49ab6009/FLAG3b72a3b54 [2024-06-20 17:28:15,851 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63483ed33/b71b62687d46441896f7fc3e49ab6009 [2024-06-20 17:28:15,852 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 17:28:15,853 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 17:28:15,854 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 17:28:15,854 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 17:28:15,857 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 17:28:15,858 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:28:14" (1/2) ... [2024-06-20 17:28:15,859 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@365e9008 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:28:15, skipping insertion in model container [2024-06-20 17:28:15,859 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:28:14" (1/2) ... [2024-06-20 17:28:15,860 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6192534a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:28:15, skipping insertion in model container [2024-06-20 17:28:15,860 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 05:28:15" (2/2) ... [2024-06-20 17:28:15,860 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@365e9008 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:28:15, skipping insertion in model container [2024-06-20 17:28:15,860 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 05:28:15" (2/2) ... [2024-06-20 17:28:15,860 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 17:28:15,921 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 17:28:15,922 INFO L97 edCorrectnessWitness]: Location invariant before [L819-L819] (((((((((((((((! multithreaded || z$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= z$w_buff0 && z$w_buff0 <= 2) && z$w_buff0 <= 127) && z$w_buff0 % 2 == 0) && (z$w_buff0 == 0 || z$w_buff0 == 2)))) && (! multithreaded || ((((0 <= z$w_buff1 && z$w_buff1 <= 2) && z$w_buff1 <= 127) && z$w_buff1 % 2 == 0) && (z$w_buff1 == 0 || z$w_buff1 == 2)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= z$mem_tmp && z$mem_tmp <= 2) && z$mem_tmp <= 127) && ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2))) [2024-06-20 17:28:15,922 INFO L97 edCorrectnessWitness]: Location invariant before [L821-L821] (((((((((((((((! multithreaded || z$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= z$w_buff0 && z$w_buff0 <= 2) && z$w_buff0 <= 127) && z$w_buff0 % 2 == 0) && (z$w_buff0 == 0 || z$w_buff0 == 2)))) && (! multithreaded || ((((0 <= z$w_buff1 && z$w_buff1 <= 2) && z$w_buff1 <= 127) && z$w_buff1 % 2 == 0) && (z$w_buff1 == 0 || z$w_buff1 == 2)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= z$mem_tmp && z$mem_tmp <= 2) && z$mem_tmp <= 127) && ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2))) [2024-06-20 17:28:15,922 INFO L97 edCorrectnessWitness]: Location invariant before [L822-L822] (((((((((((((((! multithreaded || z$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= z$w_buff0 && z$w_buff0 <= 2) && z$w_buff0 <= 127) && z$w_buff0 % 2 == 0) && (z$w_buff0 == 0 || z$w_buff0 == 2)))) && (! multithreaded || ((((0 <= z$w_buff1 && z$w_buff1 <= 2) && z$w_buff1 <= 127) && z$w_buff1 % 2 == 0) && (z$w_buff1 == 0 || z$w_buff1 == 2)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= z$mem_tmp && z$mem_tmp <= 2) && z$mem_tmp <= 127) && ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2))) [2024-06-20 17:28:15,922 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 17:28:15,923 INFO L106 edCorrectnessWitness]: ghost_update [L817-L817] multithreaded = 1; [2024-06-20 17:28:15,960 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 17:28:16,305 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 17:28:16,321 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 17:28:16,420 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 17:28:16,462 INFO L206 MainTranslator]: Completed translation [2024-06-20 17:28:16,465 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:28:16 WrapperNode [2024-06-20 17:28:16,465 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 17:28:16,466 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 17:28:16,466 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 17:28:16,467 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 17:28:16,473 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:28:16" (1/1) ... [2024-06-20 17:28:16,495 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:28:16" (1/1) ... [2024-06-20 17:28:16,525 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 142 [2024-06-20 17:28:16,526 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 17:28:16,526 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 17:28:16,526 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 17:28:16,527 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 17:28:16,547 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:28:16" (1/1) ... [2024-06-20 17:28:16,548 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:28:16" (1/1) ... [2024-06-20 17:28:16,558 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:28:16" (1/1) ... [2024-06-20 17:28:16,577 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-20 17:28:16,578 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:28:16" (1/1) ... [2024-06-20 17:28:16,578 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:28:16" (1/1) ... [2024-06-20 17:28:16,584 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:28:16" (1/1) ... [2024-06-20 17:28:16,586 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:28:16" (1/1) ... [2024-06-20 17:28:16,587 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:28:16" (1/1) ... [2024-06-20 17:28:16,588 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:28:16" (1/1) ... [2024-06-20 17:28:16,591 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 17:28:16,592 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 17:28:16,592 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 17:28:16,592 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 17:28:16,592 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:28:16" (1/1) ... [2024-06-20 17:28:16,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 17:28:16,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 17:28:16,624 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-20 17:28:16,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-20 17:28:16,657 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 17:28:16,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 17:28:16,658 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 17:28:16,658 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 17:28:16,658 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 17:28:16,658 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 17:28:16,658 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 17:28:16,659 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 17:28:16,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 17:28:16,659 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 17:28:16,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 17:28:16,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 17:28:16,660 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 17:28:16,761 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 17:28:16,762 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 17:28:17,151 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 17:28:17,152 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 17:28:17,257 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 17:28:17,258 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 17:28:17,258 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 05:28:17 BoogieIcfgContainer [2024-06-20 17:28:17,258 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 17:28:17,262 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 17:28:17,262 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 17:28:17,264 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 17:28:17,265 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:28:14" (1/4) ... [2024-06-20 17:28:17,265 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5376dca0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 05:28:17, skipping insertion in model container [2024-06-20 17:28:17,265 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 05:28:15" (2/4) ... [2024-06-20 17:28:17,266 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5376dca0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 05:28:17, skipping insertion in model container [2024-06-20 17:28:17,266 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:28:16" (3/4) ... [2024-06-20 17:28:17,267 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5376dca0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 05:28:17, skipping insertion in model container [2024-06-20 17:28:17,267 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 05:28:17" (4/4) ... [2024-06-20 17:28:17,268 INFO L112 eAbstractionObserver]: Analyzing ICFG safe030_power.oepc_pso.oepc_rmo.oepc.i [2024-06-20 17:28:17,281 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 17:28:17,281 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 17:28:17,281 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 17:28:17,320 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 17:28:17,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-20 17:28:17,384 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-20 17:28:17,384 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 17:28:17,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 59 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 17:28:17,386 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-20 17:28:17,389 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-20 17:28:17,402 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 17:28:17,408 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;@66de6077, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 17:28:17,408 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 17:28:17,414 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 17:28:17,414 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 17:28:17,414 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 17:28:17,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:17,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 17:28:17,416 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)] === [2024-06-20 17:28:17,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:17,419 INFO L85 PathProgramCache]: Analyzing trace with hash 367698528, now seen corresponding path program 1 times [2024-06-20 17:28:17,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:17,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713022272] [2024-06-20 17:28:17,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:17,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:17,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:18,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:18,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:18,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713022272] [2024-06-20 17:28:18,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713022272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:18,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:18,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 17:28:18,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423738557] [2024-06-20 17:28:18,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:18,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 17:28:18,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:18,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 17:28:18,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 17:28:18,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 17:28:18,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:18,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:18,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 17:28:18,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:18,780 INFO L124 PetriNetUnfolderBase]: 1659/2477 cut-off events. [2024-06-20 17:28:18,780 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-06-20 17:28:18,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5041 conditions, 2477 events. 1659/2477 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11214 event pairs, 1184 based on Foata normal form. 1/2437 useless extension candidates. Maximal degree in co-relation 5029. Up to 2465 conditions per place. [2024-06-20 17:28:18,797 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 33 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-06-20 17:28:18,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 171 flow [2024-06-20 17:28:18,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 17:28:18,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 17:28:18,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2024-06-20 17:28:18,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-06-20 17:28:18,808 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 67 transitions. [2024-06-20 17:28:18,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 171 flow [2024-06-20 17:28:18,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 17:28:18,812 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-20 17:28:18,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-20 17:28:18,816 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-20 17:28:18,816 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-20 17:28:18,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:18,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:18,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:18,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 17:28:18,817 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)] === [2024-06-20 17:28:18,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:18,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1170999743, now seen corresponding path program 1 times [2024-06-20 17:28:18,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:18,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961033204] [2024-06-20 17:28:18,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:18,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:18,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:19,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:19,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:19,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961033204] [2024-06-20 17:28:19,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961033204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:19,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:19,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 17:28:19,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030776168] [2024-06-20 17:28:19,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:19,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 17:28:19,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:19,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 17:28:19,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-20 17:28:19,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 17:28:19,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:19,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:19,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 17:28:19,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:19,671 INFO L124 PetriNetUnfolderBase]: 1653/2468 cut-off events. [2024-06-20 17:28:19,672 INFO L125 PetriNetUnfolderBase]: For 458/458 co-relation queries the response was YES. [2024-06-20 17:28:19,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5657 conditions, 2468 events. 1653/2468 cut-off events. For 458/458 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11186 event pairs, 1038 based on Foata normal form. 3/2470 useless extension candidates. Maximal degree in co-relation 5645. Up to 2441 conditions per place. [2024-06-20 17:28:19,681 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 40 selfloop transitions, 7 changer transitions 0/51 dead transitions. [2024-06-20 17:28:19,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 51 transitions, 238 flow [2024-06-20 17:28:19,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 17:28:19,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 17:28:19,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 86 transitions. [2024-06-20 17:28:19,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-20 17:28:19,683 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 86 transitions. [2024-06-20 17:28:19,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 51 transitions, 238 flow [2024-06-20 17:28:19,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 51 transitions, 234 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 17:28:19,685 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 134 flow [2024-06-20 17:28:19,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-20 17:28:19,685 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 3 predicate places. [2024-06-20 17:28:19,686 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 134 flow [2024-06-20 17:28:19,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:19,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:19,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:19,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 17:28:19,687 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)] === [2024-06-20 17:28:19,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:19,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1941254745, now seen corresponding path program 1 times [2024-06-20 17:28:19,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:19,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875948072] [2024-06-20 17:28:19,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:19,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:19,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:20,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:20,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:20,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875948072] [2024-06-20 17:28:20,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875948072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:20,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:20,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 17:28:20,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231804328] [2024-06-20 17:28:20,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:20,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 17:28:20,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:20,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 17:28:20,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-20 17:28:20,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 17:28:20,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:20,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:20,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 17:28:20,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:20,567 INFO L124 PetriNetUnfolderBase]: 1661/2481 cut-off events. [2024-06-20 17:28:20,567 INFO L125 PetriNetUnfolderBase]: For 1306/1306 co-relation queries the response was YES. [2024-06-20 17:28:20,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6307 conditions, 2481 events. 1661/2481 cut-off events. For 1306/1306 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11214 event pairs, 812 based on Foata normal form. 5/2485 useless extension candidates. Maximal degree in co-relation 6293. Up to 2387 conditions per place. [2024-06-20 17:28:20,579 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 53 selfloop transitions, 16 changer transitions 0/73 dead transitions. [2024-06-20 17:28:20,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 73 transitions, 392 flow [2024-06-20 17:28:20,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:28:20,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:28:20,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2024-06-20 17:28:20,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565 [2024-06-20 17:28:20,585 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 134 flow. Second operand 5 states and 113 transitions. [2024-06-20 17:28:20,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 73 transitions, 392 flow [2024-06-20 17:28:20,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 73 transitions, 378 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-20 17:28:20,588 INFO L231 Difference]: Finished difference. Result has 49 places, 48 transitions, 233 flow [2024-06-20 17:28:20,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=233, PETRI_PLACES=49, PETRI_TRANSITIONS=48} [2024-06-20 17:28:20,589 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 8 predicate places. [2024-06-20 17:28:20,589 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 48 transitions, 233 flow [2024-06-20 17:28:20,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:20,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:20,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:20,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 17:28:20,591 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)] === [2024-06-20 17:28:20,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:20,591 INFO L85 PathProgramCache]: Analyzing trace with hash 187884212, now seen corresponding path program 1 times [2024-06-20 17:28:20,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:20,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860138941] [2024-06-20 17:28:20,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:20,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:20,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:21,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:21,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:21,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860138941] [2024-06-20 17:28:21,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860138941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:21,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:21,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:28:21,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616855710] [2024-06-20 17:28:21,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:21,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:28:21,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:21,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:28:21,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:28:21,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 17:28:21,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 48 transitions, 233 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:21,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:21,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 17:28:21,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:21,834 INFO L124 PetriNetUnfolderBase]: 1669/2493 cut-off events. [2024-06-20 17:28:21,835 INFO L125 PetriNetUnfolderBase]: For 3034/3036 co-relation queries the response was YES. [2024-06-20 17:28:21,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7426 conditions, 2493 events. 1669/2493 cut-off events. For 3034/3036 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11279 event pairs, 666 based on Foata normal form. 7/2499 useless extension candidates. Maximal degree in co-relation 7409. Up to 2373 conditions per place. [2024-06-20 17:28:21,846 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 60 selfloop transitions, 20 changer transitions 0/84 dead transitions. [2024-06-20 17:28:21,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 84 transitions, 519 flow [2024-06-20 17:28:21,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:28:21,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:28:21,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-20 17:28:21,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5541666666666667 [2024-06-20 17:28:21,847 INFO L175 Difference]: Start difference. First operand has 49 places, 48 transitions, 233 flow. Second operand 6 states and 133 transitions. [2024-06-20 17:28:21,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 84 transitions, 519 flow [2024-06-20 17:28:21,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 84 transitions, 511 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-20 17:28:21,851 INFO L231 Difference]: Finished difference. Result has 55 places, 52 transitions, 306 flow [2024-06-20 17:28:21,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=306, PETRI_PLACES=55, PETRI_TRANSITIONS=52} [2024-06-20 17:28:21,852 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 14 predicate places. [2024-06-20 17:28:21,852 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 52 transitions, 306 flow [2024-06-20 17:28:21,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:21,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:21,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:21,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 17:28:21,852 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)] === [2024-06-20 17:28:21,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:21,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1530039064, now seen corresponding path program 1 times [2024-06-20 17:28:21,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:21,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845227016] [2024-06-20 17:28:21,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:21,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:21,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:22,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:22,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:22,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845227016] [2024-06-20 17:28:22,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845227016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:22,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:22,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:28:22,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150768311] [2024-06-20 17:28:22,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:22,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:28:22,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:22,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:28:22,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:28:22,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-20 17:28:22,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 306 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:22,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:22,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-20 17:28:22,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:22,966 INFO L124 PetriNetUnfolderBase]: 1681/2513 cut-off events. [2024-06-20 17:28:22,966 INFO L125 PetriNetUnfolderBase]: For 4782/4784 co-relation queries the response was YES. [2024-06-20 17:28:22,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8297 conditions, 2513 events. 1681/2513 cut-off events. For 4782/4784 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11388 event pairs, 502 based on Foata normal form. 12/2524 useless extension candidates. Maximal degree in co-relation 8277. Up to 2341 conditions per place. [2024-06-20 17:28:22,978 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 64 selfloop transitions, 23 changer transitions 0/91 dead transitions. [2024-06-20 17:28:22,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 91 transitions, 620 flow [2024-06-20 17:28:22,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:28:22,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:28:22,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-06-20 17:28:22,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5321428571428571 [2024-06-20 17:28:22,980 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 306 flow. Second operand 7 states and 149 transitions. [2024-06-20 17:28:22,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 91 transitions, 620 flow [2024-06-20 17:28:22,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 91 transitions, 571 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-20 17:28:22,986 INFO L231 Difference]: Finished difference. Result has 57 places, 54 transitions, 333 flow [2024-06-20 17:28:22,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=333, PETRI_PLACES=57, PETRI_TRANSITIONS=54} [2024-06-20 17:28:22,989 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2024-06-20 17:28:22,989 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 54 transitions, 333 flow [2024-06-20 17:28:22,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:22,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:22,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:22,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 17:28:22,993 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)] === [2024-06-20 17:28:22,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:22,993 INFO L85 PathProgramCache]: Analyzing trace with hash 945572823, now seen corresponding path program 1 times [2024-06-20 17:28:22,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:22,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308693536] [2024-06-20 17:28:22,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:22,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:23,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:23,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:23,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:23,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308693536] [2024-06-20 17:28:23,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308693536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:23,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:23,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:28:23,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873585197] [2024-06-20 17:28:23,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:23,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:28:23,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:23,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:28:23,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:28:23,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:28:23,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 54 transitions, 333 flow. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:23,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:23,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:28:23,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:23,946 INFO L124 PetriNetUnfolderBase]: 1676/2505 cut-off events. [2024-06-20 17:28:23,946 INFO L125 PetriNetUnfolderBase]: For 6458/6458 co-relation queries the response was YES. [2024-06-20 17:28:23,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8823 conditions, 2505 events. 1676/2505 cut-off events. For 6458/6458 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11316 event pairs, 659 based on Foata normal form. 2/2506 useless extension candidates. Maximal degree in co-relation 8801. Up to 2484 conditions per place. [2024-06-20 17:28:23,966 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 54 selfloop transitions, 8 changer transitions 0/65 dead transitions. [2024-06-20 17:28:23,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 65 transitions, 485 flow [2024-06-20 17:28:23,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:28:23,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:28:23,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 81 transitions. [2024-06-20 17:28:23,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.405 [2024-06-20 17:28:23,968 INFO L175 Difference]: Start difference. First operand has 57 places, 54 transitions, 333 flow. Second operand 5 states and 81 transitions. [2024-06-20 17:28:23,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 65 transitions, 485 flow [2024-06-20 17:28:23,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 65 transitions, 421 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-20 17:28:23,972 INFO L231 Difference]: Finished difference. Result has 57 places, 54 transitions, 293 flow [2024-06-20 17:28:23,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=293, PETRI_PLACES=57, PETRI_TRANSITIONS=54} [2024-06-20 17:28:23,975 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2024-06-20 17:28:23,975 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 54 transitions, 293 flow [2024-06-20 17:28:23,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:23,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:23,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:23,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 17:28:23,976 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)] === [2024-06-20 17:28:23,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:23,976 INFO L85 PathProgramCache]: Analyzing trace with hash -752531503, now seen corresponding path program 1 times [2024-06-20 17:28:23,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:23,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327038713] [2024-06-20 17:28:23,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:23,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:23,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:24,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:24,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:24,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327038713] [2024-06-20 17:28:24,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327038713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:24,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:24,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:28:24,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110410875] [2024-06-20 17:28:24,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:24,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:28:24,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:24,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:28:24,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:28:24,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:28:24,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 54 transitions, 293 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:24,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:24,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:28:24,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:25,019 INFO L124 PetriNetUnfolderBase]: 1680/2511 cut-off events. [2024-06-20 17:28:25,019 INFO L125 PetriNetUnfolderBase]: For 7537/7537 co-relation queries the response was YES. [2024-06-20 17:28:25,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8825 conditions, 2511 events. 1680/2511 cut-off events. For 7537/7537 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11306 event pairs, 617 based on Foata normal form. 6/2516 useless extension candidates. Maximal degree in co-relation 8801. Up to 2442 conditions per place. [2024-06-20 17:28:25,034 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 64 selfloop transitions, 17 changer transitions 0/84 dead transitions. [2024-06-20 17:28:25,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 84 transitions, 585 flow [2024-06-20 17:28:25,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:28:25,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:28:25,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-20 17:28:25,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42916666666666664 [2024-06-20 17:28:25,037 INFO L175 Difference]: Start difference. First operand has 57 places, 54 transitions, 293 flow. Second operand 6 states and 103 transitions. [2024-06-20 17:28:25,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 84 transitions, 585 flow [2024-06-20 17:28:25,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 84 transitions, 563 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-20 17:28:25,042 INFO L231 Difference]: Finished difference. Result has 61 places, 65 transitions, 402 flow [2024-06-20 17:28:25,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=402, PETRI_PLACES=61, PETRI_TRANSITIONS=65} [2024-06-20 17:28:25,043 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 20 predicate places. [2024-06-20 17:28:25,043 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 65 transitions, 402 flow [2024-06-20 17:28:25,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:25,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:25,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:25,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 17:28:25,044 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)] === [2024-06-20 17:28:25,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:25,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1964610644, now seen corresponding path program 1 times [2024-06-20 17:28:25,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:25,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61440556] [2024-06-20 17:28:25,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:25,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:25,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:25,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:25,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:25,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61440556] [2024-06-20 17:28:25,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61440556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:25,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:25,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:28:25,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281952234] [2024-06-20 17:28:25,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:25,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:28:25,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:25,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:28:25,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:28:25,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:28:25,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 65 transitions, 402 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:25,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:25,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:28:25,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:26,036 INFO L124 PetriNetUnfolderBase]: 1686/2521 cut-off events. [2024-06-20 17:28:26,036 INFO L125 PetriNetUnfolderBase]: For 10563/10567 co-relation queries the response was YES. [2024-06-20 17:28:26,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9820 conditions, 2521 events. 1686/2521 cut-off events. For 10563/10567 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11325 event pairs, 636 based on Foata normal form. 8/2528 useless extension candidates. Maximal degree in co-relation 9794. Up to 2424 conditions per place. [2024-06-20 17:28:26,049 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 66 selfloop transitions, 19 changer transitions 0/88 dead transitions. [2024-06-20 17:28:26,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 88 transitions, 672 flow [2024-06-20 17:28:26,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:28:26,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:28:26,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-20 17:28:26,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-20 17:28:26,054 INFO L175 Difference]: Start difference. First operand has 61 places, 65 transitions, 402 flow. Second operand 6 states and 104 transitions. [2024-06-20 17:28:26,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 88 transitions, 672 flow [2024-06-20 17:28:26,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 88 transitions, 654 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-20 17:28:26,066 INFO L231 Difference]: Finished difference. Result has 66 places, 68 transitions, 456 flow [2024-06-20 17:28:26,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=456, PETRI_PLACES=66, PETRI_TRANSITIONS=68} [2024-06-20 17:28:26,067 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 25 predicate places. [2024-06-20 17:28:26,067 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 68 transitions, 456 flow [2024-06-20 17:28:26,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:26,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:26,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:26,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 17:28:26,068 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)] === [2024-06-20 17:28:26,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:26,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1837242752, now seen corresponding path program 2 times [2024-06-20 17:28:26,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:26,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746760262] [2024-06-20 17:28:26,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:26,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:26,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:26,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:26,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:26,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746760262] [2024-06-20 17:28:26,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746760262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:26,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:26,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:28:26,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795751141] [2024-06-20 17:28:26,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:26,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:28:26,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:26,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:28:26,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:28:26,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:28:26,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 68 transitions, 456 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:26,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:26,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:28:26,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:27,062 INFO L124 PetriNetUnfolderBase]: 1671/2495 cut-off events. [2024-06-20 17:28:27,063 INFO L125 PetriNetUnfolderBase]: For 11830/11830 co-relation queries the response was YES. [2024-06-20 17:28:27,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9921 conditions, 2495 events. 1671/2495 cut-off events. For 11830/11830 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11118 event pairs, 632 based on Foata normal form. 2/2496 useless extension candidates. Maximal degree in co-relation 9892. Up to 2465 conditions per place. [2024-06-20 17:28:27,075 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 69 selfloop transitions, 11 changer transitions 0/83 dead transitions. [2024-06-20 17:28:27,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 83 transitions, 654 flow [2024-06-20 17:28:27,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:28:27,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:28:27,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-06-20 17:28:27,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-20 17:28:27,077 INFO L175 Difference]: Start difference. First operand has 66 places, 68 transitions, 456 flow. Second operand 6 states and 95 transitions. [2024-06-20 17:28:27,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 83 transitions, 654 flow [2024-06-20 17:28:27,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 83 transitions, 625 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 17:28:27,087 INFO L231 Difference]: Finished difference. Result has 69 places, 68 transitions, 457 flow [2024-06-20 17:28:27,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=457, PETRI_PLACES=69, PETRI_TRANSITIONS=68} [2024-06-20 17:28:27,088 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 28 predicate places. [2024-06-20 17:28:27,088 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 68 transitions, 457 flow [2024-06-20 17:28:27,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:27,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:27,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:27,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 17:28:27,089 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)] === [2024-06-20 17:28:27,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:27,090 INFO L85 PathProgramCache]: Analyzing trace with hash 773388816, now seen corresponding path program 1 times [2024-06-20 17:28:27,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:27,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053046528] [2024-06-20 17:28:27,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:27,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:27,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:27,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:27,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:27,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053046528] [2024-06-20 17:28:27,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053046528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:27,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:27,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:28:27,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811935534] [2024-06-20 17:28:27,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:27,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:28:27,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:27,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:28:27,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:28:27,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:28:27,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 68 transitions, 457 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:27,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:27,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:28:27,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:28,190 INFO L124 PetriNetUnfolderBase]: 1839/2735 cut-off events. [2024-06-20 17:28:28,190 INFO L125 PetriNetUnfolderBase]: For 14800/14800 co-relation queries the response was YES. [2024-06-20 17:28:28,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11018 conditions, 2735 events. 1839/2735 cut-off events. For 14800/14800 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 12390 event pairs, 549 based on Foata normal form. 12/2746 useless extension candidates. Maximal degree in co-relation 10988. Up to 2361 conditions per place. [2024-06-20 17:28:28,204 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 86 selfloop transitions, 31 changer transitions 0/120 dead transitions. [2024-06-20 17:28:28,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 120 transitions, 981 flow [2024-06-20 17:28:28,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:28:28,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:28:28,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-20 17:28:28,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46785714285714286 [2024-06-20 17:28:28,206 INFO L175 Difference]: Start difference. First operand has 69 places, 68 transitions, 457 flow. Second operand 7 states and 131 transitions. [2024-06-20 17:28:28,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 120 transitions, 981 flow [2024-06-20 17:28:28,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 120 transitions, 934 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 17:28:28,217 INFO L231 Difference]: Finished difference. Result has 73 places, 87 transitions, 658 flow [2024-06-20 17:28:28,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=410, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=658, PETRI_PLACES=73, PETRI_TRANSITIONS=87} [2024-06-20 17:28:28,219 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 32 predicate places. [2024-06-20 17:28:28,219 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 87 transitions, 658 flow [2024-06-20 17:28:28,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:28,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:28,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:28,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 17:28:28,220 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)] === [2024-06-20 17:28:28,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:28,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1129780498, now seen corresponding path program 2 times [2024-06-20 17:28:28,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:28,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103376948] [2024-06-20 17:28:28,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:28,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:28,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:28,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:28,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:28,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103376948] [2024-06-20 17:28:28,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103376948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:28,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:28,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:28:28,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747081327] [2024-06-20 17:28:28,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:28,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:28:28,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:28,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:28:28,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:28:28,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:28:28,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 87 transitions, 658 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:28,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:28,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:28:28,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:29,391 INFO L124 PetriNetUnfolderBase]: 1875/2785 cut-off events. [2024-06-20 17:28:29,391 INFO L125 PetriNetUnfolderBase]: For 19841/19841 co-relation queries the response was YES. [2024-06-20 17:28:29,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12995 conditions, 2785 events. 1875/2785 cut-off events. For 19841/19841 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 12564 event pairs, 591 based on Foata normal form. 6/2790 useless extension candidates. Maximal degree in co-relation 12961. Up to 2647 conditions per place. [2024-06-20 17:28:29,408 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 96 selfloop transitions, 23 changer transitions 0/122 dead transitions. [2024-06-20 17:28:29,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 122 transitions, 1138 flow [2024-06-20 17:28:29,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:28:29,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:28:29,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-20 17:28:29,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43214285714285716 [2024-06-20 17:28:29,410 INFO L175 Difference]: Start difference. First operand has 73 places, 87 transitions, 658 flow. Second operand 7 states and 121 transitions. [2024-06-20 17:28:29,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 122 transitions, 1138 flow [2024-06-20 17:28:29,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 122 transitions, 1094 flow, removed 21 selfloop flow, removed 1 redundant places. [2024-06-20 17:28:29,425 INFO L231 Difference]: Finished difference. Result has 80 places, 95 transitions, 766 flow [2024-06-20 17:28:29,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=622, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=766, PETRI_PLACES=80, PETRI_TRANSITIONS=95} [2024-06-20 17:28:29,426 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 39 predicate places. [2024-06-20 17:28:29,426 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 95 transitions, 766 flow [2024-06-20 17:28:29,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:29,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:29,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:29,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 17:28:29,426 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)] === [2024-06-20 17:28:29,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:29,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1628244688, now seen corresponding path program 3 times [2024-06-20 17:28:29,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:29,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876535447] [2024-06-20 17:28:29,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:29,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:29,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:30,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:30,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:30,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876535447] [2024-06-20 17:28:30,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876535447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:30,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:30,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:28:30,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762313744] [2024-06-20 17:28:30,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:30,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:28:30,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:30,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:28:30,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:28:30,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:28:30,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 95 transitions, 766 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:30,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:30,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:28:30,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:30,650 INFO L124 PetriNetUnfolderBase]: 1879/2791 cut-off events. [2024-06-20 17:28:30,650 INFO L125 PetriNetUnfolderBase]: For 23702/23702 co-relation queries the response was YES. [2024-06-20 17:28:30,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13571 conditions, 2791 events. 1879/2791 cut-off events. For 23702/23702 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 12609 event pairs, 585 based on Foata normal form. 6/2796 useless extension candidates. Maximal degree in co-relation 13533. Up to 2716 conditions per place. [2024-06-20 17:28:30,667 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 99 selfloop transitions, 21 changer transitions 0/123 dead transitions. [2024-06-20 17:28:30,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 123 transitions, 1166 flow [2024-06-20 17:28:30,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:28:30,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:28:30,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-20 17:28:30,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41785714285714287 [2024-06-20 17:28:30,668 INFO L175 Difference]: Start difference. First operand has 80 places, 95 transitions, 766 flow. Second operand 7 states and 117 transitions. [2024-06-20 17:28:30,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 123 transitions, 1166 flow [2024-06-20 17:28:30,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 123 transitions, 1117 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-20 17:28:30,687 INFO L231 Difference]: Finished difference. Result has 85 places, 101 transitions, 844 flow [2024-06-20 17:28:30,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=720, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=844, PETRI_PLACES=85, PETRI_TRANSITIONS=101} [2024-06-20 17:28:30,688 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 44 predicate places. [2024-06-20 17:28:30,688 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 101 transitions, 844 flow [2024-06-20 17:28:30,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:30,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:30,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:30,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 17:28:30,688 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:28:30,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:30,689 INFO L85 PathProgramCache]: Analyzing trace with hash 950766414, now seen corresponding path program 1 times [2024-06-20 17:28:30,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:30,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607547033] [2024-06-20 17:28:30,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:30,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:30,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:31,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:31,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:31,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607547033] [2024-06-20 17:28:31,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607547033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:31,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:31,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:28:31,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485746270] [2024-06-20 17:28:31,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:31,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:28:31,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:31,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:28:31,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:28:31,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:28:31,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 101 transitions, 844 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:31,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:31,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:28:31,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:32,244 INFO L124 PetriNetUnfolderBase]: 1882/2796 cut-off events. [2024-06-20 17:28:32,244 INFO L125 PetriNetUnfolderBase]: For 25921/25921 co-relation queries the response was YES. [2024-06-20 17:28:32,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13906 conditions, 2796 events. 1882/2796 cut-off events. For 25921/25921 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 12644 event pairs, 567 based on Foata normal form. 6/2801 useless extension candidates. Maximal degree in co-relation 13866. Up to 2701 conditions per place. [2024-06-20 17:28:32,263 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 98 selfloop transitions, 25 changer transitions 0/126 dead transitions. [2024-06-20 17:28:32,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 126 transitions, 1224 flow [2024-06-20 17:28:32,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:28:32,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:28:32,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-20 17:28:32,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-20 17:28:32,264 INFO L175 Difference]: Start difference. First operand has 85 places, 101 transitions, 844 flow. Second operand 7 states and 118 transitions. [2024-06-20 17:28:32,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 126 transitions, 1224 flow [2024-06-20 17:28:32,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 126 transitions, 1171 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-20 17:28:32,284 INFO L231 Difference]: Finished difference. Result has 88 places, 104 transitions, 887 flow [2024-06-20 17:28:32,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=791, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=887, PETRI_PLACES=88, PETRI_TRANSITIONS=104} [2024-06-20 17:28:32,285 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 47 predicate places. [2024-06-20 17:28:32,286 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 104 transitions, 887 flow [2024-06-20 17:28:32,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:32,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:32,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:32,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 17:28:32,286 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:28:32,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:32,287 INFO L85 PathProgramCache]: Analyzing trace with hash 450339565, now seen corresponding path program 1 times [2024-06-20 17:28:32,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:32,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58758353] [2024-06-20 17:28:32,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:32,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:32,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:32,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:32,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:32,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58758353] [2024-06-20 17:28:32,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58758353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:32,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:32,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:28:32,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819481470] [2024-06-20 17:28:32,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:32,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:28:32,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:32,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:28:32,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:28:32,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:28:32,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 104 transitions, 887 flow. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:32,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:32,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:28:32,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:33,264 INFO L124 PetriNetUnfolderBase]: 1879/2792 cut-off events. [2024-06-20 17:28:33,264 INFO L125 PetriNetUnfolderBase]: For 28319/28319 co-relation queries the response was YES. [2024-06-20 17:28:33,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14297 conditions, 2792 events. 1879/2792 cut-off events. For 28319/28319 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 12603 event pairs, 587 based on Foata normal form. 1/2792 useless extension candidates. Maximal degree in co-relation 14256. Up to 2777 conditions per place. [2024-06-20 17:28:33,278 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 101 selfloop transitions, 8 changer transitions 0/112 dead transitions. [2024-06-20 17:28:33,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 112 transitions, 1125 flow [2024-06-20 17:28:33,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:28:33,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:28:33,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 77 transitions. [2024-06-20 17:28:33,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.385 [2024-06-20 17:28:33,279 INFO L175 Difference]: Start difference. First operand has 88 places, 104 transitions, 887 flow. Second operand 5 states and 77 transitions. [2024-06-20 17:28:33,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 112 transitions, 1125 flow [2024-06-20 17:28:33,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 112 transitions, 1045 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-20 17:28:33,296 INFO L231 Difference]: Finished difference. Result has 88 places, 104 transitions, 829 flow [2024-06-20 17:28:33,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=829, PETRI_PLACES=88, PETRI_TRANSITIONS=104} [2024-06-20 17:28:33,297 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 47 predicate places. [2024-06-20 17:28:33,297 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 104 transitions, 829 flow [2024-06-20 17:28:33,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:33,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:33,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:33,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 17:28:33,298 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)] === [2024-06-20 17:28:33,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:33,298 INFO L85 PathProgramCache]: Analyzing trace with hash 2108162711, now seen corresponding path program 1 times [2024-06-20 17:28:33,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:33,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938059869] [2024-06-20 17:28:33,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:33,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:33,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:33,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:33,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:33,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938059869] [2024-06-20 17:28:33,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938059869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:33,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:33,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:28:33,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426309956] [2024-06-20 17:28:33,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:33,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:28:33,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:33,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:28:33,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:28:34,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:28:34,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 104 transitions, 829 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:34,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:34,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:28:34,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:34,389 INFO L124 PetriNetUnfolderBase]: 1890/2809 cut-off events. [2024-06-20 17:28:34,389 INFO L125 PetriNetUnfolderBase]: For 31105/31111 co-relation queries the response was YES. [2024-06-20 17:28:34,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14432 conditions, 2809 events. 1890/2809 cut-off events. For 31105/31111 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 12716 event pairs, 573 based on Foata normal form. 8/2816 useless extension candidates. Maximal degree in co-relation 14390. Up to 2672 conditions per place. [2024-06-20 17:28:34,406 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 108 selfloop transitions, 26 changer transitions 0/137 dead transitions. [2024-06-20 17:28:34,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 137 transitions, 1299 flow [2024-06-20 17:28:34,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:28:34,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:28:34,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-20 17:28:34,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43214285714285716 [2024-06-20 17:28:34,408 INFO L175 Difference]: Start difference. First operand has 88 places, 104 transitions, 829 flow. Second operand 7 states and 121 transitions. [2024-06-20 17:28:34,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 137 transitions, 1299 flow [2024-06-20 17:28:34,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 137 transitions, 1275 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-20 17:28:34,430 INFO L231 Difference]: Finished difference. Result has 91 places, 110 transitions, 951 flow [2024-06-20 17:28:34,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=951, PETRI_PLACES=91, PETRI_TRANSITIONS=110} [2024-06-20 17:28:34,430 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 50 predicate places. [2024-06-20 17:28:34,430 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 110 transitions, 951 flow [2024-06-20 17:28:34,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:34,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:34,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:34,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 17:28:34,431 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)] === [2024-06-20 17:28:34,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:34,431 INFO L85 PathProgramCache]: Analyzing trace with hash 2108252921, now seen corresponding path program 2 times [2024-06-20 17:28:34,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:34,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814059352] [2024-06-20 17:28:34,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:34,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:34,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:35,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:35,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:35,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814059352] [2024-06-20 17:28:35,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814059352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:35,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:35,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:28:35,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572722212] [2024-06-20 17:28:35,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:35,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:28:35,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:35,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:28:35,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:28:35,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:28:35,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 110 transitions, 951 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:35,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:35,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:28:35,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:35,671 INFO L124 PetriNetUnfolderBase]: 1885/2802 cut-off events. [2024-06-20 17:28:35,672 INFO L125 PetriNetUnfolderBase]: For 35230/35236 co-relation queries the response was YES. [2024-06-20 17:28:35,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14990 conditions, 2802 events. 1885/2802 cut-off events. For 35230/35236 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 12684 event pairs, 578 based on Foata normal form. 8/2809 useless extension candidates. Maximal degree in co-relation 14948. Up to 2700 conditions per place. [2024-06-20 17:28:35,689 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 107 selfloop transitions, 22 changer transitions 0/132 dead transitions. [2024-06-20 17:28:35,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 132 transitions, 1265 flow [2024-06-20 17:28:35,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:28:35,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:28:35,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-20 17:28:35,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-20 17:28:35,691 INFO L175 Difference]: Start difference. First operand has 91 places, 110 transitions, 951 flow. Second operand 7 states and 116 transitions. [2024-06-20 17:28:35,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 132 transitions, 1265 flow [2024-06-20 17:28:35,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 132 transitions, 1184 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-20 17:28:35,722 INFO L231 Difference]: Finished difference. Result has 95 places, 110 transitions, 922 flow [2024-06-20 17:28:35,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=870, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=922, PETRI_PLACES=95, PETRI_TRANSITIONS=110} [2024-06-20 17:28:35,722 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 54 predicate places. [2024-06-20 17:28:35,723 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 110 transitions, 922 flow [2024-06-20 17:28:35,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:35,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:35,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:35,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 17:28:35,723 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)] === [2024-06-20 17:28:35,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:35,724 INFO L85 PathProgramCache]: Analyzing trace with hash 2111977726, now seen corresponding path program 1 times [2024-06-20 17:28:35,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:35,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387849856] [2024-06-20 17:28:35,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:35,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:35,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:36,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:36,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:36,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387849856] [2024-06-20 17:28:36,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387849856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:36,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:36,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:28:36,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080134820] [2024-06-20 17:28:36,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:36,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:28:36,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:36,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:28:36,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:28:36,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:28:36,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 110 transitions, 922 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:36,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:36,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:28:36,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:37,043 INFO L124 PetriNetUnfolderBase]: 1969/2923 cut-off events. [2024-06-20 17:28:37,043 INFO L125 PetriNetUnfolderBase]: For 40366/40368 co-relation queries the response was YES. [2024-06-20 17:28:37,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15892 conditions, 2923 events. 1969/2923 cut-off events. For 40366/40368 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 13309 event pairs, 540 based on Foata normal form. 8/2930 useless extension candidates. Maximal degree in co-relation 15848. Up to 2461 conditions per place. [2024-06-20 17:28:37,063 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 101 selfloop transitions, 47 changer transitions 0/151 dead transitions. [2024-06-20 17:28:37,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 151 transitions, 1594 flow [2024-06-20 17:28:37,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:28:37,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:28:37,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-20 17:28:37,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-20 17:28:37,065 INFO L175 Difference]: Start difference. First operand has 95 places, 110 transitions, 922 flow. Second operand 7 states and 130 transitions. [2024-06-20 17:28:37,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 151 transitions, 1594 flow [2024-06-20 17:28:37,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 151 transitions, 1539 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 17:28:37,094 INFO L231 Difference]: Finished difference. Result has 98 places, 119 transitions, 1129 flow [2024-06-20 17:28:37,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=867, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1129, PETRI_PLACES=98, PETRI_TRANSITIONS=119} [2024-06-20 17:28:37,094 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 57 predicate places. [2024-06-20 17:28:37,094 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 119 transitions, 1129 flow [2024-06-20 17:28:37,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:37,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:37,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:37,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 17:28:37,096 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)] === [2024-06-20 17:28:37,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:37,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1794755250, now seen corresponding path program 2 times [2024-06-20 17:28:37,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:37,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804043997] [2024-06-20 17:28:37,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:37,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:37,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:37,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:37,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:37,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804043997] [2024-06-20 17:28:37,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804043997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:37,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:37,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:28:37,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112213042] [2024-06-20 17:28:37,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:37,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:28:37,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:37,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:28:37,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:28:37,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:28:37,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 119 transitions, 1129 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:37,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:37,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:28:37,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:38,178 INFO L124 PetriNetUnfolderBase]: 1957/2907 cut-off events. [2024-06-20 17:28:38,178 INFO L125 PetriNetUnfolderBase]: For 45917/45919 co-relation queries the response was YES. [2024-06-20 17:28:38,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16772 conditions, 2907 events. 1957/2907 cut-off events. For 45917/45919 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 13243 event pairs, 540 based on Foata normal form. 8/2914 useless extension candidates. Maximal degree in co-relation 16725. Up to 2455 conditions per place. [2024-06-20 17:28:38,197 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 102 selfloop transitions, 50 changer transitions 0/155 dead transitions. [2024-06-20 17:28:38,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 155 transitions, 1717 flow [2024-06-20 17:28:38,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:28:38,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:28:38,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-20 17:28:38,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-20 17:28:38,199 INFO L175 Difference]: Start difference. First operand has 98 places, 119 transitions, 1129 flow. Second operand 7 states and 133 transitions. [2024-06-20 17:28:38,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 155 transitions, 1717 flow [2024-06-20 17:28:38,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 155 transitions, 1622 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-20 17:28:38,236 INFO L231 Difference]: Finished difference. Result has 104 places, 122 transitions, 1237 flow [2024-06-20 17:28:38,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1035, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1237, PETRI_PLACES=104, PETRI_TRANSITIONS=122} [2024-06-20 17:28:38,237 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 63 predicate places. [2024-06-20 17:28:38,237 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 122 transitions, 1237 flow [2024-06-20 17:28:38,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:38,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:38,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:38,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 17:28:38,237 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)] === [2024-06-20 17:28:38,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:38,238 INFO L85 PathProgramCache]: Analyzing trace with hash -663254450, now seen corresponding path program 3 times [2024-06-20 17:28:38,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:38,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341781508] [2024-06-20 17:28:38,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:38,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:38,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:38,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:38,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:38,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341781508] [2024-06-20 17:28:38,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341781508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:38,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:38,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:28:38,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75526162] [2024-06-20 17:28:38,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:38,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:28:38,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:38,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:28:38,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:28:38,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:28:38,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 122 transitions, 1237 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:38,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:38,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:28:38,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:39,404 INFO L124 PetriNetUnfolderBase]: 1961/2912 cut-off events. [2024-06-20 17:28:39,404 INFO L125 PetriNetUnfolderBase]: For 50184/50190 co-relation queries the response was YES. [2024-06-20 17:28:39,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17346 conditions, 2912 events. 1961/2912 cut-off events. For 50184/50190 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 13195 event pairs, 576 based on Foata normal form. 12/2923 useless extension candidates. Maximal degree in co-relation 17296. Up to 2804 conditions per place. [2024-06-20 17:28:39,423 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 122 selfloop transitions, 23 changer transitions 0/148 dead transitions. [2024-06-20 17:28:39,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 148 transitions, 1685 flow [2024-06-20 17:28:39,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:28:39,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:28:39,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-20 17:28:39,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-20 17:28:39,425 INFO L175 Difference]: Start difference. First operand has 104 places, 122 transitions, 1237 flow. Second operand 7 states and 118 transitions. [2024-06-20 17:28:39,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 148 transitions, 1685 flow [2024-06-20 17:28:39,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 148 transitions, 1585 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-20 17:28:39,463 INFO L231 Difference]: Finished difference. Result has 106 places, 126 transitions, 1264 flow [2024-06-20 17:28:39,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1144, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1264, PETRI_PLACES=106, PETRI_TRANSITIONS=126} [2024-06-20 17:28:39,463 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 65 predicate places. [2024-06-20 17:28:39,463 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 126 transitions, 1264 flow [2024-06-20 17:28:39,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:39,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:39,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:39,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 17:28:39,464 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:28:39,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:39,465 INFO L85 PathProgramCache]: Analyzing trace with hash -656096953, now seen corresponding path program 1 times [2024-06-20 17:28:39,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:39,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455779076] [2024-06-20 17:28:39,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:39,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:39,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:40,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:40,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:40,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455779076] [2024-06-20 17:28:40,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455779076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:40,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:40,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:28:40,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031699053] [2024-06-20 17:28:40,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:40,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:28:40,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:40,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:28:40,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:28:40,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:28:40,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 126 transitions, 1264 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:40,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:40,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:28:40,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:40,889 INFO L124 PetriNetUnfolderBase]: 1963/2914 cut-off events. [2024-06-20 17:28:40,889 INFO L125 PetriNetUnfolderBase]: For 52823/52823 co-relation queries the response was YES. [2024-06-20 17:28:40,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17261 conditions, 2914 events. 1963/2914 cut-off events. For 52823/52823 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13286 event pairs, 563 based on Foata normal form. 3/2916 useless extension candidates. Maximal degree in co-relation 17211. Up to 2808 conditions per place. [2024-06-20 17:28:40,905 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 118 selfloop transitions, 30 changer transitions 0/151 dead transitions. [2024-06-20 17:28:40,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 151 transitions, 1708 flow [2024-06-20 17:28:40,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:28:40,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:28:40,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-20 17:28:40,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-20 17:28:40,906 INFO L175 Difference]: Start difference. First operand has 106 places, 126 transitions, 1264 flow. Second operand 7 states and 118 transitions. [2024-06-20 17:28:40,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 151 transitions, 1708 flow [2024-06-20 17:28:40,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 151 transitions, 1639 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-20 17:28:40,942 INFO L231 Difference]: Finished difference. Result has 108 places, 130 transitions, 1333 flow [2024-06-20 17:28:40,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1195, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1333, PETRI_PLACES=108, PETRI_TRANSITIONS=130} [2024-06-20 17:28:40,942 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 67 predicate places. [2024-06-20 17:28:40,948 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 130 transitions, 1333 flow [2024-06-20 17:28:40,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:40,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:40,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:40,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 17:28:40,949 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:28:40,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:40,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1075626349, now seen corresponding path program 1 times [2024-06-20 17:28:40,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:40,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141357372] [2024-06-20 17:28:40,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:40,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:40,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:41,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:41,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:41,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141357372] [2024-06-20 17:28:41,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141357372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:41,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:41,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:28:41,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987052996] [2024-06-20 17:28:41,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:41,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:28:41,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:41,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:28:41,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:28:41,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:28:41,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 130 transitions, 1333 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:41,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:41,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:28:41,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:42,222 INFO L124 PetriNetUnfolderBase]: 1957/2906 cut-off events. [2024-06-20 17:28:42,223 INFO L125 PetriNetUnfolderBase]: For 56297/56297 co-relation queries the response was YES. [2024-06-20 17:28:42,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17772 conditions, 2906 events. 1957/2906 cut-off events. For 56297/56297 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13119 event pairs, 573 based on Foata normal form. 2/2907 useless extension candidates. Maximal degree in co-relation 17721. Up to 2885 conditions per place. [2024-06-20 17:28:42,241 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 129 selfloop transitions, 11 changer transitions 0/143 dead transitions. [2024-06-20 17:28:42,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 143 transitions, 1663 flow [2024-06-20 17:28:42,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:28:42,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:28:42,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 89 transitions. [2024-06-20 17:28:42,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37083333333333335 [2024-06-20 17:28:42,243 INFO L175 Difference]: Start difference. First operand has 108 places, 130 transitions, 1333 flow. Second operand 6 states and 89 transitions. [2024-06-20 17:28:42,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 143 transitions, 1663 flow [2024-06-20 17:28:42,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 143 transitions, 1575 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-20 17:28:42,287 INFO L231 Difference]: Finished difference. Result has 109 places, 133 transitions, 1305 flow [2024-06-20 17:28:42,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1245, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1305, PETRI_PLACES=109, PETRI_TRANSITIONS=133} [2024-06-20 17:28:42,288 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 68 predicate places. [2024-06-20 17:28:42,288 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 133 transitions, 1305 flow [2024-06-20 17:28:42,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:42,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:42,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:42,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 17:28:42,288 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)] === [2024-06-20 17:28:42,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:42,289 INFO L85 PathProgramCache]: Analyzing trace with hash 928475023, now seen corresponding path program 1 times [2024-06-20 17:28:42,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:42,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17046051] [2024-06-20 17:28:42,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:42,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:42,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:43,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:43,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:43,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17046051] [2024-06-20 17:28:43,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17046051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:43,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:43,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:28:43,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988201543] [2024-06-20 17:28:43,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:43,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:28:43,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:43,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:28:43,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:28:43,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:28:43,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 133 transitions, 1305 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:43,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:43,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:28:43,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:43,812 INFO L124 PetriNetUnfolderBase]: 1974/2934 cut-off events. [2024-06-20 17:28:43,813 INFO L125 PetriNetUnfolderBase]: For 61252/61258 co-relation queries the response was YES. [2024-06-20 17:28:43,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18269 conditions, 2934 events. 1974/2934 cut-off events. For 61252/61258 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13365 event pairs, 418 based on Foata normal form. 10/2943 useless extension candidates. Maximal degree in co-relation 18217. Up to 2699 conditions per place. [2024-06-20 17:28:43,834 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 135 selfloop transitions, 32 changer transitions 0/170 dead transitions. [2024-06-20 17:28:43,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 170 transitions, 1897 flow [2024-06-20 17:28:43,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:28:43,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:28:43,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-20 17:28:43,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-20 17:28:43,837 INFO L175 Difference]: Start difference. First operand has 109 places, 133 transitions, 1305 flow. Second operand 8 states and 136 transitions. [2024-06-20 17:28:43,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 170 transitions, 1897 flow [2024-06-20 17:28:43,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 170 transitions, 1859 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-20 17:28:43,885 INFO L231 Difference]: Finished difference. Result has 113 places, 137 transitions, 1438 flow [2024-06-20 17:28:43,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1267, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1438, PETRI_PLACES=113, PETRI_TRANSITIONS=137} [2024-06-20 17:28:43,886 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 72 predicate places. [2024-06-20 17:28:43,886 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 137 transitions, 1438 flow [2024-06-20 17:28:43,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:43,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:43,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:43,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 17:28:43,888 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)] === [2024-06-20 17:28:43,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:43,888 INFO L85 PathProgramCache]: Analyzing trace with hash 79070485, now seen corresponding path program 2 times [2024-06-20 17:28:43,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:43,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671140772] [2024-06-20 17:28:43,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:43,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:43,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:44,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:44,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:44,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671140772] [2024-06-20 17:28:44,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671140772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:44,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:44,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:28:44,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631275864] [2024-06-20 17:28:44,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:44,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:28:44,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:44,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:28:44,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:28:44,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:28:44,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 137 transitions, 1438 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:44,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:44,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:28:44,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:45,271 INFO L124 PetriNetUnfolderBase]: 1991/2961 cut-off events. [2024-06-20 17:28:45,271 INFO L125 PetriNetUnfolderBase]: For 67762/67768 co-relation queries the response was YES. [2024-06-20 17:28:45,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18952 conditions, 2961 events. 1991/2961 cut-off events. For 67762/67768 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13514 event pairs, 541 based on Foata normal form. 10/2970 useless extension candidates. Maximal degree in co-relation 18899. Up to 2808 conditions per place. [2024-06-20 17:28:45,294 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 138 selfloop transitions, 28 changer transitions 0/169 dead transitions. [2024-06-20 17:28:45,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 169 transitions, 1898 flow [2024-06-20 17:28:45,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:28:45,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:28:45,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-20 17:28:45,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415625 [2024-06-20 17:28:45,296 INFO L175 Difference]: Start difference. First operand has 113 places, 137 transitions, 1438 flow. Second operand 8 states and 133 transitions. [2024-06-20 17:28:45,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 169 transitions, 1898 flow [2024-06-20 17:28:45,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 169 transitions, 1792 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-20 17:28:45,347 INFO L231 Difference]: Finished difference. Result has 117 places, 139 transitions, 1451 flow [2024-06-20 17:28:45,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1348, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1451, PETRI_PLACES=117, PETRI_TRANSITIONS=139} [2024-06-20 17:28:45,347 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 76 predicate places. [2024-06-20 17:28:45,348 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 139 transitions, 1451 flow [2024-06-20 17:28:45,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:45,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:45,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:45,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 17:28:45,348 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)] === [2024-06-20 17:28:45,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:45,349 INFO L85 PathProgramCache]: Analyzing trace with hash 928535597, now seen corresponding path program 1 times [2024-06-20 17:28:45,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:45,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736301550] [2024-06-20 17:28:45,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:45,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:45,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:46,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:46,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:46,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736301550] [2024-06-20 17:28:46,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736301550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:46,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:46,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:28:46,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835692111] [2024-06-20 17:28:46,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:46,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:28:46,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:46,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:28:46,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:28:46,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:28:46,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 139 transitions, 1451 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:46,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:46,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:28:46,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:46,714 INFO L124 PetriNetUnfolderBase]: 2075/3081 cut-off events. [2024-06-20 17:28:46,714 INFO L125 PetriNetUnfolderBase]: For 74540/74542 co-relation queries the response was YES. [2024-06-20 17:28:46,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19770 conditions, 3081 events. 2075/3081 cut-off events. For 74540/74542 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 14266 event pairs, 468 based on Foata normal form. 8/3088 useless extension candidates. Maximal degree in co-relation 19715. Up to 2406 conditions per place. [2024-06-20 17:28:46,734 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 132 selfloop transitions, 67 changer transitions 0/202 dead transitions. [2024-06-20 17:28:46,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 202 transitions, 2445 flow [2024-06-20 17:28:46,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:28:46,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:28:46,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-20 17:28:46,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675 [2024-06-20 17:28:46,736 INFO L175 Difference]: Start difference. First operand has 117 places, 139 transitions, 1451 flow. Second operand 10 states and 187 transitions. [2024-06-20 17:28:46,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 202 transitions, 2445 flow [2024-06-20 17:28:46,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 202 transitions, 2364 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-20 17:28:46,789 INFO L231 Difference]: Finished difference. Result has 123 places, 151 transitions, 1694 flow [2024-06-20 17:28:46,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1370, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1694, PETRI_PLACES=123, PETRI_TRANSITIONS=151} [2024-06-20 17:28:46,789 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 82 predicate places. [2024-06-20 17:28:46,790 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 151 transitions, 1694 flow [2024-06-20 17:28:46,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:46,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:46,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:46,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 17:28:46,790 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)] === [2024-06-20 17:28:46,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:46,791 INFO L85 PathProgramCache]: Analyzing trace with hash 931331983, now seen corresponding path program 3 times [2024-06-20 17:28:46,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:46,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406925178] [2024-06-20 17:28:46,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:46,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:46,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:47,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:47,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:47,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406925178] [2024-06-20 17:28:47,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406925178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:47,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:47,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:28:47,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031640338] [2024-06-20 17:28:47,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:47,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:28:47,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:47,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:28:47,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:28:47,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:28:47,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 151 transitions, 1694 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:47,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:47,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:28:47,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:48,365 INFO L124 PetriNetUnfolderBase]: 2067/3068 cut-off events. [2024-06-20 17:28:48,366 INFO L125 PetriNetUnfolderBase]: For 81440/81446 co-relation queries the response was YES. [2024-06-20 17:28:48,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20804 conditions, 3068 events. 2067/3068 cut-off events. For 81440/81446 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 14094 event pairs, 537 based on Foata normal form. 10/3077 useless extension candidates. Maximal degree in co-relation 20746. Up to 2948 conditions per place. [2024-06-20 17:28:48,388 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 151 selfloop transitions, 24 changer transitions 0/178 dead transitions. [2024-06-20 17:28:48,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 178 transitions, 2112 flow [2024-06-20 17:28:48,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:28:48,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:28:48,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-20 17:28:48,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-20 17:28:48,390 INFO L175 Difference]: Start difference. First operand has 123 places, 151 transitions, 1694 flow. Second operand 8 states and 130 transitions. [2024-06-20 17:28:48,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 178 transitions, 2112 flow [2024-06-20 17:28:48,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 178 transitions, 1945 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-20 17:28:48,464 INFO L231 Difference]: Finished difference. Result has 126 places, 151 transitions, 1582 flow [2024-06-20 17:28:48,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1527, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1582, PETRI_PLACES=126, PETRI_TRANSITIONS=151} [2024-06-20 17:28:48,465 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 85 predicate places. [2024-06-20 17:28:48,465 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 151 transitions, 1582 flow [2024-06-20 17:28:48,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:48,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:48,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:48,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 17:28:48,466 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)] === [2024-06-20 17:28:48,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:48,466 INFO L85 PathProgramCache]: Analyzing trace with hash 197158289, now seen corresponding path program 2 times [2024-06-20 17:28:48,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:48,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966409925] [2024-06-20 17:28:48,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:48,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:48,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:49,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:49,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:49,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966409925] [2024-06-20 17:28:49,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966409925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:49,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:49,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:28:49,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098322788] [2024-06-20 17:28:49,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:49,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:28:49,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:49,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:28:49,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:28:49,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:28:49,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 151 transitions, 1582 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:49,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:49,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:28:49,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:49,969 INFO L124 PetriNetUnfolderBase]: 2103/3121 cut-off events. [2024-06-20 17:28:49,970 INFO L125 PetriNetUnfolderBase]: For 86365/86367 co-relation queries the response was YES. [2024-06-20 17:28:49,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21072 conditions, 3121 events. 2103/3121 cut-off events. For 86365/86367 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 14480 event pairs, 454 based on Foata normal form. 8/3128 useless extension candidates. Maximal degree in co-relation 21012. Up to 2518 conditions per place. [2024-06-20 17:28:49,995 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 135 selfloop transitions, 65 changer transitions 0/203 dead transitions. [2024-06-20 17:28:49,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 203 transitions, 2467 flow [2024-06-20 17:28:49,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:28:49,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:28:49,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-20 17:28:49,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-20 17:28:49,997 INFO L175 Difference]: Start difference. First operand has 126 places, 151 transitions, 1582 flow. Second operand 9 states and 171 transitions. [2024-06-20 17:28:49,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 203 transitions, 2467 flow [2024-06-20 17:28:50,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 203 transitions, 2404 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-20 17:28:50,067 INFO L231 Difference]: Finished difference. Result has 129 places, 156 transitions, 1758 flow [2024-06-20 17:28:50,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1519, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1758, PETRI_PLACES=129, PETRI_TRANSITIONS=156} [2024-06-20 17:28:50,067 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 88 predicate places. [2024-06-20 17:28:50,068 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 156 transitions, 1758 flow [2024-06-20 17:28:50,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:50,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:50,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:50,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 17:28:50,068 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)] === [2024-06-20 17:28:50,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:50,069 INFO L85 PathProgramCache]: Analyzing trace with hash 197342863, now seen corresponding path program 1 times [2024-06-20 17:28:50,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:50,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460281101] [2024-06-20 17:28:50,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:50,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:50,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:50,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:50,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:50,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460281101] [2024-06-20 17:28:50,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460281101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:50,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:50,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:28:50,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971758278] [2024-06-20 17:28:50,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:50,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:28:50,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:50,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:28:50,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:28:51,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:28:51,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 156 transitions, 1758 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:51,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:51,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:28:51,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:51,605 INFO L124 PetriNetUnfolderBase]: 2159/3209 cut-off events. [2024-06-20 17:28:51,605 INFO L125 PetriNetUnfolderBase]: For 98730/98732 co-relation queries the response was YES. [2024-06-20 17:28:51,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22423 conditions, 3209 events. 2159/3209 cut-off events. For 98730/98732 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 15049 event pairs, 470 based on Foata normal form. 14/3222 useless extension candidates. Maximal degree in co-relation 22361. Up to 2708 conditions per place. [2024-06-20 17:28:51,681 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 137 selfloop transitions, 53 changer transitions 0/193 dead transitions. [2024-06-20 17:28:51,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 193 transitions, 2450 flow [2024-06-20 17:28:51,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:28:51,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:28:51,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-20 17:28:51,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45625 [2024-06-20 17:28:51,683 INFO L175 Difference]: Start difference. First operand has 129 places, 156 transitions, 1758 flow. Second operand 8 states and 146 transitions. [2024-06-20 17:28:51,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 193 transitions, 2450 flow [2024-06-20 17:28:51,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 193 transitions, 2274 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-20 17:28:51,762 INFO L231 Difference]: Finished difference. Result has 130 places, 160 transitions, 1775 flow [2024-06-20 17:28:51,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1582, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1775, PETRI_PLACES=130, PETRI_TRANSITIONS=160} [2024-06-20 17:28:51,763 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 89 predicate places. [2024-06-20 17:28:51,763 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 160 transitions, 1775 flow [2024-06-20 17:28:51,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:51,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:51,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:51,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 17:28:51,764 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)] === [2024-06-20 17:28:51,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:51,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1046800907, now seen corresponding path program 3 times [2024-06-20 17:28:51,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:51,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236950913] [2024-06-20 17:28:51,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:51,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:51,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:52,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:52,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:52,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236950913] [2024-06-20 17:28:52,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236950913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:52,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:52,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:28:52,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393892981] [2024-06-20 17:28:52,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:52,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:28:52,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:52,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:28:52,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:28:52,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:28:52,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 160 transitions, 1775 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:52,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:52,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:28:52,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:53,185 INFO L124 PetriNetUnfolderBase]: 2195/3261 cut-off events. [2024-06-20 17:28:53,185 INFO L125 PetriNetUnfolderBase]: For 103169/103171 co-relation queries the response was YES. [2024-06-20 17:28:53,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23139 conditions, 3261 events. 2195/3261 cut-off events. For 103169/103171 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 15265 event pairs, 453 based on Foata normal form. 8/3268 useless extension candidates. Maximal degree in co-relation 23076. Up to 2778 conditions per place. [2024-06-20 17:28:53,209 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 138 selfloop transitions, 55 changer transitions 0/196 dead transitions. [2024-06-20 17:28:53,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 196 transitions, 2423 flow [2024-06-20 17:28:53,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:28:53,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:28:53,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-20 17:28:53,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.446875 [2024-06-20 17:28:53,211 INFO L175 Difference]: Start difference. First operand has 130 places, 160 transitions, 1775 flow. Second operand 8 states and 143 transitions. [2024-06-20 17:28:53,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 196 transitions, 2423 flow [2024-06-20 17:28:53,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 196 transitions, 2260 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-20 17:28:53,305 INFO L231 Difference]: Finished difference. Result has 132 places, 164 transitions, 1807 flow [2024-06-20 17:28:53,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1612, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1807, PETRI_PLACES=132, PETRI_TRANSITIONS=164} [2024-06-20 17:28:53,306 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 91 predicate places. [2024-06-20 17:28:53,306 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 164 transitions, 1807 flow [2024-06-20 17:28:53,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:53,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:53,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:53,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 17:28:53,306 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)] === [2024-06-20 17:28:53,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:53,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1027338124, now seen corresponding path program 1 times [2024-06-20 17:28:53,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:53,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880866192] [2024-06-20 17:28:53,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:53,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:53,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:53,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:53,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:53,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880866192] [2024-06-20 17:28:53,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880866192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:53,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:53,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:28:53,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655884875] [2024-06-20 17:28:53,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:53,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:28:53,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:53,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:28:53,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:28:53,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:28:53,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 164 transitions, 1807 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:53,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:53,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:28:53,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:54,382 INFO L124 PetriNetUnfolderBase]: 2200/3266 cut-off events. [2024-06-20 17:28:54,382 INFO L125 PetriNetUnfolderBase]: For 107244/107244 co-relation queries the response was YES. [2024-06-20 17:28:54,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23237 conditions, 3266 events. 2200/3266 cut-off events. For 107244/107244 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 15186 event pairs, 540 based on Foata normal form. 1/3266 useless extension candidates. Maximal degree in co-relation 23173. Up to 3229 conditions per place. [2024-06-20 17:28:54,409 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 164 selfloop transitions, 16 changer transitions 0/183 dead transitions. [2024-06-20 17:28:54,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 183 transitions, 2311 flow [2024-06-20 17:28:54,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:28:54,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:28:54,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-20 17:28:54,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4041666666666667 [2024-06-20 17:28:54,411 INFO L175 Difference]: Start difference. First operand has 132 places, 164 transitions, 1807 flow. Second operand 6 states and 97 transitions. [2024-06-20 17:28:54,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 183 transitions, 2311 flow [2024-06-20 17:28:54,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 183 transitions, 2156 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-20 17:28:54,512 INFO L231 Difference]: Finished difference. Result has 132 places, 167 transitions, 1738 flow [2024-06-20 17:28:54,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1654, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1738, PETRI_PLACES=132, PETRI_TRANSITIONS=167} [2024-06-20 17:28:54,513 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 91 predicate places. [2024-06-20 17:28:54,513 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 167 transitions, 1738 flow [2024-06-20 17:28:54,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:54,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:54,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:54,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 17:28:54,514 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)] === [2024-06-20 17:28:54,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:54,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1377958257, now seen corresponding path program 2 times [2024-06-20 17:28:54,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:54,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934917050] [2024-06-20 17:28:54,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:54,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:54,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:55,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:55,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:55,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934917050] [2024-06-20 17:28:55,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934917050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:55,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:55,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:28:55,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133207704] [2024-06-20 17:28:55,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:55,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:28:55,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:55,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:28:55,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:28:55,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:28:55,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 167 transitions, 1738 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:55,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:55,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:28:55,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:56,090 INFO L124 PetriNetUnfolderBase]: 2228/3310 cut-off events. [2024-06-20 17:28:56,091 INFO L125 PetriNetUnfolderBase]: For 114420/114420 co-relation queries the response was YES. [2024-06-20 17:28:56,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23282 conditions, 3310 events. 2228/3310 cut-off events. For 114420/114420 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 15474 event pairs, 527 based on Foata normal form. 6/3315 useless extension candidates. Maximal degree in co-relation 23217. Up to 3151 conditions per place. [2024-06-20 17:28:56,117 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 165 selfloop transitions, 30 changer transitions 0/198 dead transitions. [2024-06-20 17:28:56,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 198 transitions, 2388 flow [2024-06-20 17:28:56,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:28:56,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:28:56,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-20 17:28:56,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-06-20 17:28:56,118 INFO L175 Difference]: Start difference. First operand has 132 places, 167 transitions, 1738 flow. Second operand 8 states and 134 transitions. [2024-06-20 17:28:56,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 198 transitions, 2388 flow [2024-06-20 17:28:56,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 198 transitions, 2245 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-20 17:28:56,212 INFO L231 Difference]: Finished difference. Result has 134 places, 170 transitions, 1741 flow [2024-06-20 17:28:56,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1595, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1741, PETRI_PLACES=134, PETRI_TRANSITIONS=170} [2024-06-20 17:28:56,213 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 93 predicate places. [2024-06-20 17:28:56,213 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 170 transitions, 1741 flow [2024-06-20 17:28:56,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:56,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:56,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:56,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 17:28:56,213 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)] === [2024-06-20 17:28:56,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:56,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1596661569, now seen corresponding path program 3 times [2024-06-20 17:28:56,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:56,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537296588] [2024-06-20 17:28:56,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:56,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:56,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:57,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:57,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:57,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537296588] [2024-06-20 17:28:57,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537296588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:57,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:57,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:28:57,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823651312] [2024-06-20 17:28:57,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:57,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:28:57,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:57,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:28:57,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:28:57,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:28:57,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 170 transitions, 1741 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:57,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:57,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:28:57,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:57,676 INFO L124 PetriNetUnfolderBase]: 2256/3354 cut-off events. [2024-06-20 17:28:57,676 INFO L125 PetriNetUnfolderBase]: For 122146/122146 co-relation queries the response was YES. [2024-06-20 17:28:57,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23994 conditions, 3354 events. 2256/3354 cut-off events. For 122146/122146 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 15719 event pairs, 530 based on Foata normal form. 6/3359 useless extension candidates. Maximal degree in co-relation 23929. Up to 3255 conditions per place. [2024-06-20 17:28:57,702 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 172 selfloop transitions, 24 changer transitions 0/199 dead transitions. [2024-06-20 17:28:57,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 199 transitions, 2337 flow [2024-06-20 17:28:57,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:28:57,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:28:57,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-20 17:28:57,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.409375 [2024-06-20 17:28:57,703 INFO L175 Difference]: Start difference. First operand has 134 places, 170 transitions, 1741 flow. Second operand 8 states and 131 transitions. [2024-06-20 17:28:57,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 199 transitions, 2337 flow [2024-06-20 17:28:57,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 199 transitions, 2215 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-20 17:28:57,795 INFO L231 Difference]: Finished difference. Result has 136 places, 173 transitions, 1759 flow [2024-06-20 17:28:57,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1619, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1759, PETRI_PLACES=136, PETRI_TRANSITIONS=173} [2024-06-20 17:28:57,796 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 95 predicate places. [2024-06-20 17:28:57,796 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 173 transitions, 1759 flow [2024-06-20 17:28:57,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:57,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:57,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:57,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 17:28:57,797 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)] === [2024-06-20 17:28:57,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:57,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1150064051, now seen corresponding path program 4 times [2024-06-20 17:28:57,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:57,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213733742] [2024-06-20 17:28:57,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:57,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:57,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:58,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:58,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:58,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213733742] [2024-06-20 17:28:58,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213733742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:58,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:58,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:28:58,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527326198] [2024-06-20 17:28:58,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:58,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:28:58,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:58,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:28:58,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:28:58,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:28:58,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 173 transitions, 1759 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:58,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:58,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:28:58,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:59,220 INFO L124 PetriNetUnfolderBase]: 2260/3361 cut-off events. [2024-06-20 17:28:59,221 INFO L125 PetriNetUnfolderBase]: For 127065/127071 co-relation queries the response was YES. [2024-06-20 17:28:59,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24095 conditions, 3361 events. 2260/3361 cut-off events. For 127065/127071 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 15777 event pairs, 529 based on Foata normal form. 12/3372 useless extension candidates. Maximal degree in co-relation 24029. Up to 3219 conditions per place. [2024-06-20 17:28:59,246 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 174 selfloop transitions, 27 changer transitions 0/204 dead transitions. [2024-06-20 17:28:59,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 204 transitions, 2375 flow [2024-06-20 17:28:59,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:28:59,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:28:59,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-20 17:28:59,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-06-20 17:28:59,248 INFO L175 Difference]: Start difference. First operand has 136 places, 173 transitions, 1759 flow. Second operand 8 states and 134 transitions. [2024-06-20 17:28:59,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 204 transitions, 2375 flow [2024-06-20 17:28:59,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 204 transitions, 2259 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-20 17:28:59,341 INFO L231 Difference]: Finished difference. Result has 138 places, 177 transitions, 1794 flow [2024-06-20 17:28:59,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1643, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1794, PETRI_PLACES=138, PETRI_TRANSITIONS=177} [2024-06-20 17:28:59,342 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 97 predicate places. [2024-06-20 17:28:59,343 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 177 transitions, 1794 flow [2024-06-20 17:28:59,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:59,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:59,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:59,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 17:28:59,343 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:28:59,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:59,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1143875565, now seen corresponding path program 4 times [2024-06-20 17:28:59,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:59,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620363719] [2024-06-20 17:28:59,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:59,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:59,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:00,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:00,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:00,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620363719] [2024-06-20 17:29:00,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620363719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:00,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:00,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:29:00,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10155783] [2024-06-20 17:29:00,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:00,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:29:00,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:00,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:29:00,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:29:00,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:29:00,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 177 transitions, 1794 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:00,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:00,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:29:00,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:01,084 INFO L124 PetriNetUnfolderBase]: 2288/3404 cut-off events. [2024-06-20 17:29:01,085 INFO L125 PetriNetUnfolderBase]: For 134881/134881 co-relation queries the response was YES. [2024-06-20 17:29:01,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24590 conditions, 3404 events. 2288/3404 cut-off events. For 134881/134881 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 16027 event pairs, 535 based on Foata normal form. 6/3409 useless extension candidates. Maximal degree in co-relation 24523. Up to 3246 conditions per place. [2024-06-20 17:29:01,115 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 167 selfloop transitions, 36 changer transitions 0/206 dead transitions. [2024-06-20 17:29:01,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 206 transitions, 2416 flow [2024-06-20 17:29:01,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:29:01,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:29:01,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-20 17:29:01,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415625 [2024-06-20 17:29:01,117 INFO L175 Difference]: Start difference. First operand has 138 places, 177 transitions, 1794 flow. Second operand 8 states and 133 transitions. [2024-06-20 17:29:01,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 206 transitions, 2416 flow [2024-06-20 17:29:01,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 206 transitions, 2307 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-20 17:29:01,232 INFO L231 Difference]: Finished difference. Result has 140 places, 180 transitions, 1861 flow [2024-06-20 17:29:01,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1685, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1861, PETRI_PLACES=140, PETRI_TRANSITIONS=180} [2024-06-20 17:29:01,233 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 99 predicate places. [2024-06-20 17:29:01,233 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 180 transitions, 1861 flow [2024-06-20 17:29:01,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:01,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:01,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:01,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 17:29:01,234 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:29:01,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:01,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1141783145, now seen corresponding path program 1 times [2024-06-20 17:29:01,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:01,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278744556] [2024-06-20 17:29:01,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:01,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:01,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:01,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:01,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:01,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278744556] [2024-06-20 17:29:01,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278744556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:01,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:01,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:29:01,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595834384] [2024-06-20 17:29:01,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:01,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:29:01,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:01,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:29:01,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:29:02,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:29:02,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 180 transitions, 1861 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:02,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:02,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:29:02,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:02,569 INFO L124 PetriNetUnfolderBase]: 2290/3408 cut-off events. [2024-06-20 17:29:02,569 INFO L125 PetriNetUnfolderBase]: For 139566/139572 co-relation queries the response was YES. [2024-06-20 17:29:02,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24907 conditions, 3408 events. 2290/3408 cut-off events. For 139566/139572 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 16027 event pairs, 522 based on Foata normal form. 9/3416 useless extension candidates. Maximal degree in co-relation 24839. Up to 3254 conditions per place. [2024-06-20 17:29:02,598 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 167 selfloop transitions, 36 changer transitions 0/206 dead transitions. [2024-06-20 17:29:02,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 206 transitions, 2479 flow [2024-06-20 17:29:02,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:29:02,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:29:02,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-20 17:29:02,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 17:29:02,600 INFO L175 Difference]: Start difference. First operand has 140 places, 180 transitions, 1861 flow. Second operand 7 states and 120 transitions. [2024-06-20 17:29:02,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 206 transitions, 2479 flow [2024-06-20 17:29:02,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 206 transitions, 2323 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-20 17:29:02,715 INFO L231 Difference]: Finished difference. Result has 141 places, 184 transitions, 1889 flow [2024-06-20 17:29:02,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1711, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1889, PETRI_PLACES=141, PETRI_TRANSITIONS=184} [2024-06-20 17:29:02,715 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 100 predicate places. [2024-06-20 17:29:02,715 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 184 transitions, 1889 flow [2024-06-20 17:29:02,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:02,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:02,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:02,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 17:29:02,716 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:29:02,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:02,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1144172235, now seen corresponding path program 5 times [2024-06-20 17:29:02,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:02,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42992017] [2024-06-20 17:29:02,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:02,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:02,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:03,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:03,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:03,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42992017] [2024-06-20 17:29:03,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42992017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:03,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:03,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:29:03,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394984530] [2024-06-20 17:29:03,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:03,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:29:03,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:03,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:29:03,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:29:03,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:29:03,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 184 transitions, 1889 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:03,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:03,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:29:03,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:04,120 INFO L124 PetriNetUnfolderBase]: 2293/3412 cut-off events. [2024-06-20 17:29:04,121 INFO L125 PetriNetUnfolderBase]: For 136482/136482 co-relation queries the response was YES. [2024-06-20 17:29:04,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24724 conditions, 3412 events. 2293/3412 cut-off events. For 136482/136482 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 16079 event pairs, 509 based on Foata normal form. 6/3417 useless extension candidates. Maximal degree in co-relation 24655. Up to 3285 conditions per place. [2024-06-20 17:29:04,148 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 182 selfloop transitions, 28 changer transitions 0/213 dead transitions. [2024-06-20 17:29:04,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 213 transitions, 2529 flow [2024-06-20 17:29:04,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:29:04,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:29:04,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-20 17:29:04,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-20 17:29:04,156 INFO L175 Difference]: Start difference. First operand has 141 places, 184 transitions, 1889 flow. Second operand 8 states and 132 transitions. [2024-06-20 17:29:04,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 213 transitions, 2529 flow [2024-06-20 17:29:04,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 213 transitions, 2403 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-20 17:29:04,267 INFO L231 Difference]: Finished difference. Result has 144 places, 187 transitions, 1923 flow [2024-06-20 17:29:04,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1763, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1923, PETRI_PLACES=144, PETRI_TRANSITIONS=187} [2024-06-20 17:29:04,267 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 103 predicate places. [2024-06-20 17:29:04,267 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 187 transitions, 1923 flow [2024-06-20 17:29:04,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:04,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:04,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:04,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 17:29:04,268 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:29:04,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:04,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1015333684, now seen corresponding path program 2 times [2024-06-20 17:29:04,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:04,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830158416] [2024-06-20 17:29:04,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:04,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:04,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:04,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:04,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:04,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830158416] [2024-06-20 17:29:04,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830158416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:04,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:04,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:29:04,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55942332] [2024-06-20 17:29:04,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:04,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:29:04,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:04,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:29:04,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:29:04,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:29:04,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 187 transitions, 1923 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:04,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:04,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:29:04,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:05,367 INFO L124 PetriNetUnfolderBase]: 2290/3408 cut-off events. [2024-06-20 17:29:05,368 INFO L125 PetriNetUnfolderBase]: For 141045/141045 co-relation queries the response was YES. [2024-06-20 17:29:05,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24975 conditions, 3408 events. 2290/3408 cut-off events. For 141045/141045 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 16037 event pairs, 534 based on Foata normal form. 1/3408 useless extension candidates. Maximal degree in co-relation 24905. Up to 3390 conditions per place. [2024-06-20 17:29:05,397 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 182 selfloop transitions, 11 changer transitions 0/196 dead transitions. [2024-06-20 17:29:05,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 196 transitions, 2331 flow [2024-06-20 17:29:05,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:29:05,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:29:05,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 88 transitions. [2024-06-20 17:29:05,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-20 17:29:05,398 INFO L175 Difference]: Start difference. First operand has 144 places, 187 transitions, 1923 flow. Second operand 6 states and 88 transitions. [2024-06-20 17:29:05,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 196 transitions, 2331 flow [2024-06-20 17:29:05,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 196 transitions, 2185 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-20 17:29:05,519 INFO L231 Difference]: Finished difference. Result has 144 places, 187 transitions, 1805 flow [2024-06-20 17:29:05,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1777, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1805, PETRI_PLACES=144, PETRI_TRANSITIONS=187} [2024-06-20 17:29:05,519 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 103 predicate places. [2024-06-20 17:29:05,520 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 187 transitions, 1805 flow [2024-06-20 17:29:05,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:05,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:05,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:05,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 17:29:05,520 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:29:05,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:05,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1060221622, now seen corresponding path program 1 times [2024-06-20 17:29:05,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:05,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060704712] [2024-06-20 17:29:05,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:05,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:05,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:06,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:06,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:06,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060704712] [2024-06-20 17:29:06,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060704712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:06,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:06,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:29:06,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455574407] [2024-06-20 17:29:06,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:06,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:29:06,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:06,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:29:06,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:29:06,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:29:06,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 187 transitions, 1805 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:06,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:06,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:29:06,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:06,783 INFO L124 PetriNetUnfolderBase]: 2289/3407 cut-off events. [2024-06-20 17:29:06,784 INFO L125 PetriNetUnfolderBase]: For 145462/145462 co-relation queries the response was YES. [2024-06-20 17:29:06,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24722 conditions, 3407 events. 2289/3407 cut-off events. For 145462/145462 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 16089 event pairs, 532 based on Foata normal form. 3/3409 useless extension candidates. Maximal degree in co-relation 24651. Up to 3340 conditions per place. [2024-06-20 17:29:06,810 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 176 selfloop transitions, 24 changer transitions 0/203 dead transitions. [2024-06-20 17:29:06,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 203 transitions, 2348 flow [2024-06-20 17:29:06,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:29:06,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:29:06,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-20 17:29:06,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-06-20 17:29:06,812 INFO L175 Difference]: Start difference. First operand has 144 places, 187 transitions, 1805 flow. Second operand 6 states and 98 transitions. [2024-06-20 17:29:06,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 203 transitions, 2348 flow [2024-06-20 17:29:06,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 203 transitions, 2316 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-20 17:29:06,920 INFO L231 Difference]: Finished difference. Result has 145 places, 190 transitions, 1875 flow [2024-06-20 17:29:06,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1773, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1875, PETRI_PLACES=145, PETRI_TRANSITIONS=190} [2024-06-20 17:29:06,920 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 104 predicate places. [2024-06-20 17:29:06,920 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 190 transitions, 1875 flow [2024-06-20 17:29:06,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:06,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:06,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:06,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 17:29:06,921 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:29:06,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:06,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1014088042, now seen corresponding path program 2 times [2024-06-20 17:29:06,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:06,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116053248] [2024-06-20 17:29:06,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:06,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:06,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:07,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:07,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:07,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116053248] [2024-06-20 17:29:07,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116053248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:07,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:07,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:29:07,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042123710] [2024-06-20 17:29:07,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:07,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:29:07,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:07,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:29:07,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:29:07,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:29:07,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 190 transitions, 1875 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:07,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:07,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:29:07,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:08,131 INFO L124 PetriNetUnfolderBase]: 2254/3355 cut-off events. [2024-06-20 17:29:08,131 INFO L125 PetriNetUnfolderBase]: For 150575/150577 co-relation queries the response was YES. [2024-06-20 17:29:08,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24645 conditions, 3355 events. 2254/3355 cut-off events. For 150575/150577 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 15752 event pairs, 542 based on Foata normal form. 1/3355 useless extension candidates. Maximal degree in co-relation 24573. Up to 3289 conditions per place. [2024-06-20 17:29:08,160 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 171 selfloop transitions, 25 changer transitions 0/199 dead transitions. [2024-06-20 17:29:08,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 199 transitions, 2289 flow [2024-06-20 17:29:08,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:29:08,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:29:08,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-06-20 17:29:08,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-20 17:29:08,162 INFO L175 Difference]: Start difference. First operand has 145 places, 190 transitions, 1875 flow. Second operand 6 states and 95 transitions. [2024-06-20 17:29:08,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 199 transitions, 2289 flow [2024-06-20 17:29:08,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 199 transitions, 2229 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-20 17:29:08,296 INFO L231 Difference]: Finished difference. Result has 147 places, 190 transitions, 1871 flow [2024-06-20 17:29:08,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1815, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1871, PETRI_PLACES=147, PETRI_TRANSITIONS=190} [2024-06-20 17:29:08,296 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 106 predicate places. [2024-06-20 17:29:08,297 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 190 transitions, 1871 flow [2024-06-20 17:29:08,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:08,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:08,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:08,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 17:29:08,297 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:29:08,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:08,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1845655215, now seen corresponding path program 1 times [2024-06-20 17:29:08,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:08,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545061928] [2024-06-20 17:29:08,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:08,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:08,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:09,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:09,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:09,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545061928] [2024-06-20 17:29:09,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545061928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:09,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:09,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:29:09,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188487710] [2024-06-20 17:29:09,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:09,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:29:09,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:09,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:29:09,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:29:09,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:29:09,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 190 transitions, 1871 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:09,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:09,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:29:09,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:10,088 INFO L124 PetriNetUnfolderBase]: 3142/4763 cut-off events. [2024-06-20 17:29:10,089 INFO L125 PetriNetUnfolderBase]: For 278954/278956 co-relation queries the response was YES. [2024-06-20 17:29:10,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35299 conditions, 4763 events. 3142/4763 cut-off events. For 278954/278956 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 24685 event pairs, 479 based on Foata normal form. 64/4826 useless extension candidates. Maximal degree in co-relation 35226. Up to 1897 conditions per place. [2024-06-20 17:29:10,135 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 210 selfloop transitions, 73 changer transitions 0/286 dead transitions. [2024-06-20 17:29:10,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 286 transitions, 3689 flow [2024-06-20 17:29:10,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:29:10,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:29:10,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2024-06-20 17:29:10,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5361111111111111 [2024-06-20 17:29:10,137 INFO L175 Difference]: Start difference. First operand has 147 places, 190 transitions, 1871 flow. Second operand 9 states and 193 transitions. [2024-06-20 17:29:10,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 286 transitions, 3689 flow [2024-06-20 17:29:10,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 286 transitions, 3617 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 17:29:10,343 INFO L231 Difference]: Finished difference. Result has 155 places, 207 transitions, 2372 flow [2024-06-20 17:29:10,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1799, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2372, PETRI_PLACES=155, PETRI_TRANSITIONS=207} [2024-06-20 17:29:10,344 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 114 predicate places. [2024-06-20 17:29:10,344 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 207 transitions, 2372 flow [2024-06-20 17:29:10,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:10,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:10,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:10,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 17:29:10,345 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)] === [2024-06-20 17:29:10,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:10,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1843781265, now seen corresponding path program 2 times [2024-06-20 17:29:10,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:10,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47140696] [2024-06-20 17:29:10,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:10,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:10,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:11,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:11,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:11,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47140696] [2024-06-20 17:29:11,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47140696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:11,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:11,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:29:11,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495588983] [2024-06-20 17:29:11,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:11,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:29:11,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:11,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:29:11,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:29:11,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:29:11,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 207 transitions, 2372 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:11,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:11,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:29:11,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:12,357 INFO L124 PetriNetUnfolderBase]: 3986/6102 cut-off events. [2024-06-20 17:29:12,357 INFO L125 PetriNetUnfolderBase]: For 384399/384401 co-relation queries the response was YES. [2024-06-20 17:29:12,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49146 conditions, 6102 events. 3986/6102 cut-off events. For 384399/384401 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 33770 event pairs, 940 based on Foata normal form. 64/6165 useless extension candidates. Maximal degree in co-relation 49068. Up to 3667 conditions per place. [2024-06-20 17:29:12,419 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 210 selfloop transitions, 82 changer transitions 0/295 dead transitions. [2024-06-20 17:29:12,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 295 transitions, 4202 flow [2024-06-20 17:29:12,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:29:12,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:29:12,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-20 17:29:12,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-20 17:29:12,421 INFO L175 Difference]: Start difference. First operand has 155 places, 207 transitions, 2372 flow. Second operand 9 states and 189 transitions. [2024-06-20 17:29:12,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 295 transitions, 4202 flow [2024-06-20 17:29:12,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 295 transitions, 4114 flow, removed 43 selfloop flow, removed 1 redundant places. [2024-06-20 17:29:12,835 INFO L231 Difference]: Finished difference. Result has 165 places, 221 transitions, 2761 flow [2024-06-20 17:29:12,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2288, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2761, PETRI_PLACES=165, PETRI_TRANSITIONS=221} [2024-06-20 17:29:12,836 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 124 predicate places. [2024-06-20 17:29:12,836 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 221 transitions, 2761 flow [2024-06-20 17:29:12,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:12,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:12,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:12,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 17:29:12,837 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)] === [2024-06-20 17:29:12,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:12,837 INFO L85 PathProgramCache]: Analyzing trace with hash -2056518979, now seen corresponding path program 3 times [2024-06-20 17:29:12,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:12,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465387436] [2024-06-20 17:29:12,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:12,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:12,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:13,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:13,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:13,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465387436] [2024-06-20 17:29:13,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465387436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:13,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:13,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:29:13,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793927949] [2024-06-20 17:29:13,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:13,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:29:13,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:13,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:29:13,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:29:13,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:29:13,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 221 transitions, 2761 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:13,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:13,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:29:13,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:14,718 INFO L124 PetriNetUnfolderBase]: 3951/6077 cut-off events. [2024-06-20 17:29:14,719 INFO L125 PetriNetUnfolderBase]: For 373494/373496 co-relation queries the response was YES. [2024-06-20 17:29:14,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47757 conditions, 6077 events. 3951/6077 cut-off events. For 373494/373496 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 33903 event pairs, 1045 based on Foata normal form. 78/6154 useless extension candidates. Maximal degree in co-relation 47674. Up to 4353 conditions per place. [2024-06-20 17:29:14,778 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 202 selfloop transitions, 85 changer transitions 0/290 dead transitions. [2024-06-20 17:29:14,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 290 transitions, 4223 flow [2024-06-20 17:29:14,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:29:14,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:29:14,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-20 17:29:14,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5111111111111111 [2024-06-20 17:29:14,780 INFO L175 Difference]: Start difference. First operand has 165 places, 221 transitions, 2761 flow. Second operand 9 states and 184 transitions. [2024-06-20 17:29:14,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 290 transitions, 4223 flow [2024-06-20 17:29:15,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 290 transitions, 4050 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-20 17:29:15,199 INFO L231 Difference]: Finished difference. Result has 172 places, 228 transitions, 2962 flow [2024-06-20 17:29:15,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2592, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2962, PETRI_PLACES=172, PETRI_TRANSITIONS=228} [2024-06-20 17:29:15,200 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 131 predicate places. [2024-06-20 17:29:15,200 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 228 transitions, 2962 flow [2024-06-20 17:29:15,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:15,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:15,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:15,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 17:29:15,201 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)] === [2024-06-20 17:29:15,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:15,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1756941585, now seen corresponding path program 4 times [2024-06-20 17:29:15,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:15,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151867568] [2024-06-20 17:29:15,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:15,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:15,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:15,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:15,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:15,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151867568] [2024-06-20 17:29:15,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151867568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:15,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:15,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:29:15,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061377077] [2024-06-20 17:29:15,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:15,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:29:15,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:15,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:29:15,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:29:16,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:29:16,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 228 transitions, 2962 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:16,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:16,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:29:16,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:17,179 INFO L124 PetriNetUnfolderBase]: 4179/6449 cut-off events. [2024-06-20 17:29:17,179 INFO L125 PetriNetUnfolderBase]: For 390957/390959 co-relation queries the response was YES. [2024-06-20 17:29:17,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51368 conditions, 6449 events. 4179/6449 cut-off events. For 390957/390959 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 36723 event pairs, 1329 based on Foata normal form. 50/6498 useless extension candidates. Maximal degree in co-relation 51281. Up to 5637 conditions per place. [2024-06-20 17:29:17,241 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 210 selfloop transitions, 63 changer transitions 0/276 dead transitions. [2024-06-20 17:29:17,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 276 transitions, 3959 flow [2024-06-20 17:29:17,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:29:17,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:29:17,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-20 17:29:17,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-20 17:29:17,242 INFO L175 Difference]: Start difference. First operand has 172 places, 228 transitions, 2962 flow. Second operand 9 states and 165 transitions. [2024-06-20 17:29:17,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 276 transitions, 3959 flow [2024-06-20 17:29:17,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 276 transitions, 3718 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-20 17:29:17,701 INFO L231 Difference]: Finished difference. Result has 176 places, 235 transitions, 3034 flow [2024-06-20 17:29:17,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2727, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3034, PETRI_PLACES=176, PETRI_TRANSITIONS=235} [2024-06-20 17:29:17,702 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 135 predicate places. [2024-06-20 17:29:17,702 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 235 transitions, 3034 flow [2024-06-20 17:29:17,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:17,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:17,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:17,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 17:29:17,704 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:29:17,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:17,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1757089455, now seen corresponding path program 5 times [2024-06-20 17:29:17,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:17,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269504789] [2024-06-20 17:29:17,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:17,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:17,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:18,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:18,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:18,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269504789] [2024-06-20 17:29:18,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269504789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:18,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:18,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:29:18,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850427478] [2024-06-20 17:29:18,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:18,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:29:18,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:18,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:29:18,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:29:18,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:29:18,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 235 transitions, 3034 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:18,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:18,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:29:18,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:20,024 INFO L124 PetriNetUnfolderBase]: 5059/7835 cut-off events. [2024-06-20 17:29:20,025 INFO L125 PetriNetUnfolderBase]: For 517575/517577 co-relation queries the response was YES. [2024-06-20 17:29:20,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63241 conditions, 7835 events. 5059/7835 cut-off events. For 517575/517577 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 46451 event pairs, 1340 based on Foata normal form. 64/7898 useless extension candidates. Maximal degree in co-relation 63152. Up to 5392 conditions per place. [2024-06-20 17:29:20,112 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 239 selfloop transitions, 72 changer transitions 0/314 dead transitions. [2024-06-20 17:29:20,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 314 transitions, 4878 flow [2024-06-20 17:29:20,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:29:20,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:29:20,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-20 17:29:20,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5138888888888888 [2024-06-20 17:29:20,114 INFO L175 Difference]: Start difference. First operand has 176 places, 235 transitions, 3034 flow. Second operand 9 states and 185 transitions. [2024-06-20 17:29:20,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 314 transitions, 4878 flow [2024-06-20 17:29:20,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 314 transitions, 4651 flow, removed 57 selfloop flow, removed 6 redundant places. [2024-06-20 17:29:20,861 INFO L231 Difference]: Finished difference. Result has 183 places, 247 transitions, 3375 flow [2024-06-20 17:29:20,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2854, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3375, PETRI_PLACES=183, PETRI_TRANSITIONS=247} [2024-06-20 17:29:20,861 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 142 predicate places. [2024-06-20 17:29:20,861 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 247 transitions, 3375 flow [2024-06-20 17:29:20,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:20,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:20,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:20,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 17:29:20,862 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:29:20,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:20,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1757085735, now seen corresponding path program 6 times [2024-06-20 17:29:20,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:20,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407145550] [2024-06-20 17:29:20,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:20,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:20,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:21,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:21,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:21,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407145550] [2024-06-20 17:29:21,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407145550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:21,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:21,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:29:21,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059285313] [2024-06-20 17:29:21,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:21,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:29:21,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:21,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:29:21,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:29:21,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:29:21,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 247 transitions, 3375 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:21,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:21,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:29:21,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:23,400 INFO L124 PetriNetUnfolderBase]: 5288/8218 cut-off events. [2024-06-20 17:29:23,401 INFO L125 PetriNetUnfolderBase]: For 544947/544949 co-relation queries the response was YES. [2024-06-20 17:29:23,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65015 conditions, 8218 events. 5288/8218 cut-off events. For 544947/544949 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 49456 event pairs, 1623 based on Foata normal form. 78/8295 useless extension candidates. Maximal degree in co-relation 64921. Up to 6664 conditions per place. [2024-06-20 17:29:23,498 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 231 selfloop transitions, 75 changer transitions 0/309 dead transitions. [2024-06-20 17:29:23,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 309 transitions, 4783 flow [2024-06-20 17:29:23,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:29:23,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:29:23,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-20 17:29:23,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-20 17:29:23,500 INFO L175 Difference]: Start difference. First operand has 183 places, 247 transitions, 3375 flow. Second operand 9 states and 180 transitions. [2024-06-20 17:29:23,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 309 transitions, 4783 flow [2024-06-20 17:29:24,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 309 transitions, 4671 flow, removed 47 selfloop flow, removed 2 redundant places. [2024-06-20 17:29:24,263 INFO L231 Difference]: Finished difference. Result has 192 places, 253 transitions, 3634 flow [2024-06-20 17:29:24,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3265, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3634, PETRI_PLACES=192, PETRI_TRANSITIONS=253} [2024-06-20 17:29:24,263 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 151 predicate places. [2024-06-20 17:29:24,264 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 253 transitions, 3634 flow [2024-06-20 17:29:24,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:24,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:24,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:24,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 17:29:24,264 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:29:24,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:24,265 INFO L85 PathProgramCache]: Analyzing trace with hash 2140882350, now seen corresponding path program 1 times [2024-06-20 17:29:24,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:24,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686387424] [2024-06-20 17:29:24,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:24,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:24,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:24,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:24,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:24,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686387424] [2024-06-20 17:29:24,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686387424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:24,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:24,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:29:24,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020717730] [2024-06-20 17:29:24,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:24,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:29:24,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:24,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:29:24,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:29:24,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:29:24,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 253 transitions, 3634 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:24,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:24,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:29:24,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:26,230 INFO L124 PetriNetUnfolderBase]: 5308/8246 cut-off events. [2024-06-20 17:29:26,231 INFO L125 PetriNetUnfolderBase]: For 509500/509502 co-relation queries the response was YES. [2024-06-20 17:29:26,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66182 conditions, 8246 events. 5308/8246 cut-off events. For 509500/509502 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 49813 event pairs, 1947 based on Foata normal form. 6/8251 useless extension candidates. Maximal degree in co-relation 66084. Up to 7790 conditions per place. [2024-06-20 17:29:26,325 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 219 selfloop transitions, 63 changer transitions 0/285 dead transitions. [2024-06-20 17:29:26,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 285 transitions, 4542 flow [2024-06-20 17:29:26,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:29:26,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:29:26,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-20 17:29:26,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-20 17:29:26,327 INFO L175 Difference]: Start difference. First operand has 192 places, 253 transitions, 3634 flow. Second operand 7 states and 128 transitions. [2024-06-20 17:29:26,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 285 transitions, 4542 flow [2024-06-20 17:29:27,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 285 transitions, 4292 flow, removed 52 selfloop flow, removed 7 redundant places. [2024-06-20 17:29:27,171 INFO L231 Difference]: Finished difference. Result has 192 places, 258 transitions, 3615 flow [2024-06-20 17:29:27,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3390, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3615, PETRI_PLACES=192, PETRI_TRANSITIONS=258} [2024-06-20 17:29:27,171 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 151 predicate places. [2024-06-20 17:29:27,172 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 258 transitions, 3615 flow [2024-06-20 17:29:27,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:27,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:27,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:27,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 17:29:27,172 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)] === [2024-06-20 17:29:27,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:27,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1914419629, now seen corresponding path program 7 times [2024-06-20 17:29:27,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:27,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474563373] [2024-06-20 17:29:27,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:27,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:27,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:28,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:28,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:28,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474563373] [2024-06-20 17:29:28,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474563373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:28,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:28,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:29:28,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599724540] [2024-06-20 17:29:28,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:28,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:29:28,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:28,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:29:28,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:29:28,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:29:28,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 258 transitions, 3615 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:28,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:28,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:29:28,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:29,935 INFO L124 PetriNetUnfolderBase]: 5668/8830 cut-off events. [2024-06-20 17:29:29,936 INFO L125 PetriNetUnfolderBase]: For 589173/589175 co-relation queries the response was YES. [2024-06-20 17:29:30,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72388 conditions, 8830 events. 5668/8830 cut-off events. For 589173/589175 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 54221 event pairs, 1930 based on Foata normal form. 26/8855 useless extension candidates. Maximal degree in co-relation 72290. Up to 7434 conditions per place. [2024-06-20 17:29:30,042 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 235 selfloop transitions, 81 changer transitions 0/319 dead transitions. [2024-06-20 17:29:30,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 319 transitions, 5143 flow [2024-06-20 17:29:30,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:29:30,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:29:30,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-20 17:29:30,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49166666666666664 [2024-06-20 17:29:30,044 INFO L175 Difference]: Start difference. First operand has 192 places, 258 transitions, 3615 flow. Second operand 9 states and 177 transitions. [2024-06-20 17:29:30,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 319 transitions, 5143 flow [2024-06-20 17:29:30,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 319 transitions, 5028 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-20 17:29:30,779 INFO L231 Difference]: Finished difference. Result has 198 places, 264 transitions, 3903 flow [2024-06-20 17:29:30,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3500, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3903, PETRI_PLACES=198, PETRI_TRANSITIONS=264} [2024-06-20 17:29:30,779 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 157 predicate places. [2024-06-20 17:29:30,780 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 264 transitions, 3903 flow [2024-06-20 17:29:30,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:30,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:30,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:30,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 17:29:30,780 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)] === [2024-06-20 17:29:30,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:30,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1914415909, now seen corresponding path program 8 times [2024-06-20 17:29:30,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:30,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248296733] [2024-06-20 17:29:30,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:30,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:30,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:31,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:31,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:31,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248296733] [2024-06-20 17:29:31,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248296733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:31,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:31,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:29:31,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981081439] [2024-06-20 17:29:31,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:31,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:29:31,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:31,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:29:31,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:29:31,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:29:31,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 264 transitions, 3903 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:31,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:31,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:29:31,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:33,323 INFO L124 PetriNetUnfolderBase]: 5888/9194 cut-off events. [2024-06-20 17:29:33,323 INFO L125 PetriNetUnfolderBase]: For 675481/675483 co-relation queries the response was YES. [2024-06-20 17:29:33,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76714 conditions, 9194 events. 5888/9194 cut-off events. For 675481/675483 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 57290 event pairs, 2109 based on Foata normal form. 56/9249 useless extension candidates. Maximal degree in co-relation 76614. Up to 8254 conditions per place. [2024-06-20 17:29:33,432 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 235 selfloop transitions, 83 changer transitions 0/321 dead transitions. [2024-06-20 17:29:33,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 321 transitions, 5126 flow [2024-06-20 17:29:33,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:29:33,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:29:33,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-20 17:29:33,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47 [2024-06-20 17:29:33,433 INFO L175 Difference]: Start difference. First operand has 198 places, 264 transitions, 3903 flow. Second operand 10 states and 188 transitions. [2024-06-20 17:29:33,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 321 transitions, 5126 flow [2024-06-20 17:29:34,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 321 transitions, 4925 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-20 17:29:34,383 INFO L231 Difference]: Finished difference. Result has 203 places, 267 transitions, 4013 flow [2024-06-20 17:29:34,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3706, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4013, PETRI_PLACES=203, PETRI_TRANSITIONS=267} [2024-06-20 17:29:34,383 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 162 predicate places. [2024-06-20 17:29:34,383 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 267 transitions, 4013 flow [2024-06-20 17:29:34,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:34,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:34,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:34,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 17:29:34,388 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)] === [2024-06-20 17:29:34,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:34,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1908701617, now seen corresponding path program 1 times [2024-06-20 17:29:34,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:34,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125140714] [2024-06-20 17:29:34,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:34,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:34,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:35,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:35,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:35,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125140714] [2024-06-20 17:29:35,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125140714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:35,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:35,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:29:35,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779551060] [2024-06-20 17:29:35,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:35,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:29:35,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:35,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:29:35,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:29:35,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:29:35,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 267 transitions, 4013 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:35,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:35,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:29:35,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:37,051 INFO L124 PetriNetUnfolderBase]: 5916/9238 cut-off events. [2024-06-20 17:29:37,051 INFO L125 PetriNetUnfolderBase]: For 645812/645814 co-relation queries the response was YES. [2024-06-20 17:29:37,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77446 conditions, 9238 events. 5916/9238 cut-off events. For 645812/645814 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 57613 event pairs, 2063 based on Foata normal form. 8/9245 useless extension candidates. Maximal degree in co-relation 77344. Up to 8756 conditions per place. [2024-06-20 17:29:37,179 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 237 selfloop transitions, 61 changer transitions 0/301 dead transitions. [2024-06-20 17:29:37,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 301 transitions, 4898 flow [2024-06-20 17:29:37,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:29:37,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:29:37,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-20 17:29:37,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440625 [2024-06-20 17:29:37,180 INFO L175 Difference]: Start difference. First operand has 203 places, 267 transitions, 4013 flow. Second operand 8 states and 141 transitions. [2024-06-20 17:29:37,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 301 transitions, 4898 flow [2024-06-20 17:29:38,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 301 transitions, 4696 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-20 17:29:38,364 INFO L231 Difference]: Finished difference. Result has 204 places, 270 transitions, 4058 flow [2024-06-20 17:29:38,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3811, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4058, PETRI_PLACES=204, PETRI_TRANSITIONS=270} [2024-06-20 17:29:38,365 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 163 predicate places. [2024-06-20 17:29:38,365 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 270 transitions, 4058 flow [2024-06-20 17:29:38,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:38,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:38,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:38,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 17:29:38,365 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)] === [2024-06-20 17:29:38,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:38,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1908694177, now seen corresponding path program 2 times [2024-06-20 17:29:38,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:38,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945687801] [2024-06-20 17:29:38,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:38,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:38,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:39,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:39,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:39,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945687801] [2024-06-20 17:29:39,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945687801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:39,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:39,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:29:39,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47445119] [2024-06-20 17:29:39,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:39,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:29:39,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:39,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:29:39,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:29:39,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:29:39,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 270 transitions, 4058 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:39,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:39,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:29:39,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:40,911 INFO L124 PetriNetUnfolderBase]: 5944/9282 cut-off events. [2024-06-20 17:29:40,911 INFO L125 PetriNetUnfolderBase]: For 662595/662597 co-relation queries the response was YES. [2024-06-20 17:29:40,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77271 conditions, 9282 events. 5944/9282 cut-off events. For 662595/662597 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 58007 event pairs, 2034 based on Foata normal form. 8/9289 useless extension candidates. Maximal degree in co-relation 77168. Up to 8646 conditions per place. [2024-06-20 17:29:41,036 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 232 selfloop transitions, 72 changer transitions 0/307 dead transitions. [2024-06-20 17:29:41,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 307 transitions, 5007 flow [2024-06-20 17:29:41,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:29:41,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:29:41,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-20 17:29:41,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440625 [2024-06-20 17:29:41,037 INFO L175 Difference]: Start difference. First operand has 204 places, 270 transitions, 4058 flow. Second operand 8 states and 141 transitions. [2024-06-20 17:29:41,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 307 transitions, 5007 flow [2024-06-20 17:29:42,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 307 transitions, 4793 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-20 17:29:42,192 INFO L231 Difference]: Finished difference. Result has 208 places, 276 transitions, 4187 flow [2024-06-20 17:29:42,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3844, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4187, PETRI_PLACES=208, PETRI_TRANSITIONS=276} [2024-06-20 17:29:42,193 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 167 predicate places. [2024-06-20 17:29:42,193 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 276 transitions, 4187 flow [2024-06-20 17:29:42,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:42,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:42,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:42,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 17:29:42,194 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)] === [2024-06-20 17:29:42,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:42,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1908909379, now seen corresponding path program 9 times [2024-06-20 17:29:42,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:42,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409238055] [2024-06-20 17:29:42,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:42,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:42,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:42,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:42,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:42,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409238055] [2024-06-20 17:29:42,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409238055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:42,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:42,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:29:42,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763161076] [2024-06-20 17:29:42,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:42,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:29:42,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:42,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:29:42,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:29:43,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:29:43,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 276 transitions, 4187 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:43,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:43,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:29:43,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:44,977 INFO L124 PetriNetUnfolderBase]: 6444/10066 cut-off events. [2024-06-20 17:29:44,977 INFO L125 PetriNetUnfolderBase]: For 815674/815676 co-relation queries the response was YES. [2024-06-20 17:29:45,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83764 conditions, 10066 events. 6444/10066 cut-off events. For 815674/815676 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 63630 event pairs, 1824 based on Foata normal form. 78/10143 useless extension candidates. Maximal degree in co-relation 83659. Up to 8472 conditions per place. [2024-06-20 17:29:45,110 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 265 selfloop transitions, 79 changer transitions 0/347 dead transitions. [2024-06-20 17:29:45,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 347 transitions, 5867 flow [2024-06-20 17:29:45,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:29:45,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:29:45,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-20 17:29:45,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49444444444444446 [2024-06-20 17:29:45,111 INFO L175 Difference]: Start difference. First operand has 208 places, 276 transitions, 4187 flow. Second operand 9 states and 178 transitions. [2024-06-20 17:29:45,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 347 transitions, 5867 flow [2024-06-20 17:29:46,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 347 transitions, 5657 flow, removed 68 selfloop flow, removed 4 redundant places. [2024-06-20 17:29:46,415 INFO L231 Difference]: Finished difference. Result has 216 places, 293 transitions, 4612 flow [2024-06-20 17:29:46,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3977, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4612, PETRI_PLACES=216, PETRI_TRANSITIONS=293} [2024-06-20 17:29:46,416 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 175 predicate places. [2024-06-20 17:29:46,416 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 293 transitions, 4612 flow [2024-06-20 17:29:46,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:46,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:46,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:46,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 17:29:46,417 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:29:46,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:46,417 INFO L85 PathProgramCache]: Analyzing trace with hash 2141180880, now seen corresponding path program 2 times [2024-06-20 17:29:46,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:46,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787337953] [2024-06-20 17:29:46,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:46,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:46,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:47,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:47,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:47,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787337953] [2024-06-20 17:29:47,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787337953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:47,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:47,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:29:47,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056975330] [2024-06-20 17:29:47,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:47,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:29:47,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:47,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:29:47,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:29:47,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:29:47,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 293 transitions, 4612 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:47,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:47,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:29:47,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:49,359 INFO L124 PetriNetUnfolderBase]: 6510/10158 cut-off events. [2024-06-20 17:29:49,359 INFO L125 PetriNetUnfolderBase]: For 782477/782479 co-relation queries the response was YES. [2024-06-20 17:29:49,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87112 conditions, 10158 events. 6510/10158 cut-off events. For 782477/782479 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 64231 event pairs, 2299 based on Foata normal form. 6/10163 useless extension candidates. Maximal degree in co-relation 87002. Up to 9656 conditions per place. [2024-06-20 17:29:49,577 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 254 selfloop transitions, 70 changer transitions 0/327 dead transitions. [2024-06-20 17:29:49,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 327 transitions, 5783 flow [2024-06-20 17:29:49,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:29:49,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:29:49,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-20 17:29:49,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-20 17:29:49,578 INFO L175 Difference]: Start difference. First operand has 216 places, 293 transitions, 4612 flow. Second operand 7 states and 122 transitions. [2024-06-20 17:29:49,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 327 transitions, 5783 flow [2024-06-20 17:29:50,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 327 transitions, 5592 flow, removed 62 selfloop flow, removed 3 redundant places. [2024-06-20 17:29:50,726 INFO L231 Difference]: Finished difference. Result has 221 places, 306 transitions, 4868 flow [2024-06-20 17:29:50,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4425, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4868, PETRI_PLACES=221, PETRI_TRANSITIONS=306} [2024-06-20 17:29:50,726 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 180 predicate places. [2024-06-20 17:29:50,726 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 306 transitions, 4868 flow [2024-06-20 17:29:50,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:50,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:50,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:50,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 17:29:50,727 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:29:50,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:50,727 INFO L85 PathProgramCache]: Analyzing trace with hash 2141181252, now seen corresponding path program 1 times [2024-06-20 17:29:50,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:50,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476715154] [2024-06-20 17:29:50,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:50,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:50,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:51,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:51,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:51,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476715154] [2024-06-20 17:29:51,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476715154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:51,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:51,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:29:51,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195710717] [2024-06-20 17:29:51,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:51,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:29:51,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:51,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:29:51,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:29:51,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:29:51,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 306 transitions, 4868 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:51,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:51,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:29:51,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:53,674 INFO L124 PetriNetUnfolderBase]: 6520/10170 cut-off events. [2024-06-20 17:29:53,674 INFO L125 PetriNetUnfolderBase]: For 786234/786234 co-relation queries the response was YES. [2024-06-20 17:29:53,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86507 conditions, 10170 events. 6520/10170 cut-off events. For 786234/786234 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 64389 event pairs, 2553 based on Foata normal form. 2/10171 useless extension candidates. Maximal degree in co-relation 86395. Up to 10109 conditions per place. [2024-06-20 17:29:53,791 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 306 selfloop transitions, 23 changer transitions 0/332 dead transitions. [2024-06-20 17:29:53,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 332 transitions, 5798 flow [2024-06-20 17:29:53,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:29:53,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:29:53,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-20 17:29:53,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2024-06-20 17:29:53,793 INFO L175 Difference]: Start difference. First operand has 221 places, 306 transitions, 4868 flow. Second operand 7 states and 113 transitions. [2024-06-20 17:29:53,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 332 transitions, 5798 flow [2024-06-20 17:29:54,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 332 transitions, 5700 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-20 17:29:54,789 INFO L231 Difference]: Finished difference. Result has 225 places, 312 transitions, 4946 flow [2024-06-20 17:29:54,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4770, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4946, PETRI_PLACES=225, PETRI_TRANSITIONS=312} [2024-06-20 17:29:54,789 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 184 predicate places. [2024-06-20 17:29:54,789 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 312 transitions, 4946 flow [2024-06-20 17:29:54,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:54,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:54,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:54,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 17:29:54,790 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:29:54,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:54,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1092725931, now seen corresponding path program 3 times [2024-06-20 17:29:54,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:54,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474978526] [2024-06-20 17:29:54,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:54,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:54,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:55,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:55,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:55,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474978526] [2024-06-20 17:29:55,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474978526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:55,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:55,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:29:55,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518572335] [2024-06-20 17:29:55,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:55,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:29:55,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:55,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:29:55,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:29:55,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:29:55,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 312 transitions, 4946 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:55,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:55,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:29:55,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:58,021 INFO L124 PetriNetUnfolderBase]: 6545/10210 cut-off events. [2024-06-20 17:29:58,022 INFO L125 PetriNetUnfolderBase]: For 822292/822298 co-relation queries the response was YES. [2024-06-20 17:29:58,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86920 conditions, 10210 events. 6545/10210 cut-off events. For 822292/822298 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 64731 event pairs, 2549 based on Foata normal form. 18/10227 useless extension candidates. Maximal degree in co-relation 86807. Up to 10018 conditions per place. [2024-06-20 17:29:58,124 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 296 selfloop transitions, 43 changer transitions 0/342 dead transitions. [2024-06-20 17:29:58,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 342 transitions, 5845 flow [2024-06-20 17:29:58,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:29:58,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:29:58,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-20 17:29:58,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-06-20 17:29:58,133 INFO L175 Difference]: Start difference. First operand has 225 places, 312 transitions, 4946 flow. Second operand 8 states and 134 transitions. [2024-06-20 17:29:58,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 342 transitions, 5845 flow [2024-06-20 17:29:58,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 342 transitions, 5783 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-20 17:29:58,966 INFO L231 Difference]: Finished difference. Result has 230 places, 316 transitions, 5141 flow [2024-06-20 17:29:58,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4884, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5141, PETRI_PLACES=230, PETRI_TRANSITIONS=316} [2024-06-20 17:29:58,966 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 189 predicate places. [2024-06-20 17:29:58,966 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 316 transitions, 5141 flow [2024-06-20 17:29:58,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:58,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:58,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:58,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 17:29:58,967 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:29:58,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:58,967 INFO L85 PathProgramCache]: Analyzing trace with hash -906543712, now seen corresponding path program 1 times [2024-06-20 17:29:58,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:58,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635961923] [2024-06-20 17:29:58,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:58,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:58,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:00,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:00,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:00,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635961923] [2024-06-20 17:30:00,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635961923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:00,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:00,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:30:00,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863358318] [2024-06-20 17:30:00,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:00,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:30:00,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:00,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:30:00,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:30:00,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:30:00,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 316 transitions, 5141 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:00,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:00,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:30:00,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:02,503 INFO L124 PetriNetUnfolderBase]: 6545/10210 cut-off events. [2024-06-20 17:30:02,503 INFO L125 PetriNetUnfolderBase]: For 837806/837812 co-relation queries the response was YES. [2024-06-20 17:30:02,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87696 conditions, 10210 events. 6545/10210 cut-off events. For 837806/837812 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 64896 event pairs, 2539 based on Foata normal form. 9/10218 useless extension candidates. Maximal degree in co-relation 87581. Up to 10023 conditions per place. [2024-06-20 17:30:02,614 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 296 selfloop transitions, 47 changer transitions 0/346 dead transitions. [2024-06-20 17:30:02,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 346 transitions, 6032 flow [2024-06-20 17:30:02,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:30:02,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:30:02,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-20 17:30:02,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421875 [2024-06-20 17:30:02,616 INFO L175 Difference]: Start difference. First operand has 230 places, 316 transitions, 5141 flow. Second operand 8 states and 135 transitions. [2024-06-20 17:30:02,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 346 transitions, 6032 flow [2024-06-20 17:30:03,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 346 transitions, 5812 flow, removed 70 selfloop flow, removed 6 redundant places. [2024-06-20 17:30:03,827 INFO L231 Difference]: Finished difference. Result has 232 places, 320 transitions, 5172 flow [2024-06-20 17:30:03,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4921, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5172, PETRI_PLACES=232, PETRI_TRANSITIONS=320} [2024-06-20 17:30:03,828 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 191 predicate places. [2024-06-20 17:30:03,828 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 320 transitions, 5172 flow [2024-06-20 17:30:03,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:03,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:03,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:30:03,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 17:30:03,828 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:30:03,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:03,829 INFO L85 PathProgramCache]: Analyzing trace with hash 843904447, now seen corresponding path program 4 times [2024-06-20 17:30:03,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:03,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514568253] [2024-06-20 17:30:03,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:03,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:03,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:04,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:04,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:04,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514568253] [2024-06-20 17:30:04,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514568253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:04,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:04,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:30:04,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321807871] [2024-06-20 17:30:04,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:04,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:30:04,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:04,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:30:04,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:30:04,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:30:04,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 320 transitions, 5172 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:04,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:04,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:30:04,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:07,052 INFO L124 PetriNetUnfolderBase]: 6570/10249 cut-off events. [2024-06-20 17:30:07,053 INFO L125 PetriNetUnfolderBase]: For 866659/866665 co-relation queries the response was YES. [2024-06-20 17:30:07,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88209 conditions, 10249 events. 6570/10249 cut-off events. For 866659/866665 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 65211 event pairs, 2548 based on Foata normal form. 12/10260 useless extension candidates. Maximal degree in co-relation 88093. Up to 10067 conditions per place. [2024-06-20 17:30:07,337 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 314 selfloop transitions, 34 changer transitions 0/351 dead transitions. [2024-06-20 17:30:07,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 351 transitions, 6070 flow [2024-06-20 17:30:07,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:30:07,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:30:07,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-20 17:30:07,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415625 [2024-06-20 17:30:07,344 INFO L175 Difference]: Start difference. First operand has 232 places, 320 transitions, 5172 flow. Second operand 8 states and 133 transitions. [2024-06-20 17:30:07,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 351 transitions, 6070 flow [2024-06-20 17:30:08,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 351 transitions, 5884 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-20 17:30:08,463 INFO L231 Difference]: Finished difference. Result has 235 places, 325 transitions, 5216 flow [2024-06-20 17:30:08,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4986, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5216, PETRI_PLACES=235, PETRI_TRANSITIONS=325} [2024-06-20 17:30:08,464 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 194 predicate places. [2024-06-20 17:30:08,464 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 325 transitions, 5216 flow [2024-06-20 17:30:08,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:08,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:08,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:30:08,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 17:30:08,464 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:30:08,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:08,465 INFO L85 PathProgramCache]: Analyzing trace with hash 843689245, now seen corresponding path program 10 times [2024-06-20 17:30:08,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:08,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050523064] [2024-06-20 17:30:08,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:08,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:08,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:09,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:09,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:09,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050523064] [2024-06-20 17:30:09,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050523064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:09,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:09,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:30:09,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072007287] [2024-06-20 17:30:09,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:09,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:30:09,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:09,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:30:09,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:30:09,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:30:09,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 325 transitions, 5216 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:09,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:09,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:30:09,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:12,102 INFO L124 PetriNetUnfolderBase]: 6570/10249 cut-off events. [2024-06-20 17:30:12,102 INFO L125 PetriNetUnfolderBase]: For 906252/906258 co-relation queries the response was YES. [2024-06-20 17:30:12,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87763 conditions, 10249 events. 6570/10249 cut-off events. For 906252/906258 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 65136 event pairs, 2520 based on Foata normal form. 36/10284 useless extension candidates. Maximal degree in co-relation 87645. Up to 9953 conditions per place. [2024-06-20 17:30:12,214 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 327 selfloop transitions, 32 changer transitions 0/362 dead transitions. [2024-06-20 17:30:12,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 362 transitions, 6164 flow [2024-06-20 17:30:12,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:30:12,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:30:12,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-20 17:30:12,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41944444444444445 [2024-06-20 17:30:12,215 INFO L175 Difference]: Start difference. First operand has 235 places, 325 transitions, 5216 flow. Second operand 9 states and 151 transitions. [2024-06-20 17:30:12,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 362 transitions, 6164 flow [2024-06-20 17:30:13,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 362 transitions, 5986 flow, removed 61 selfloop flow, removed 5 redundant places. [2024-06-20 17:30:13,297 INFO L231 Difference]: Finished difference. Result has 239 places, 327 transitions, 5228 flow [2024-06-20 17:30:13,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5038, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5228, PETRI_PLACES=239, PETRI_TRANSITIONS=327} [2024-06-20 17:30:13,298 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 198 predicate places. [2024-06-20 17:30:13,298 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 327 transitions, 5228 flow [2024-06-20 17:30:13,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:13,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:13,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:30:13,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 17:30:13,299 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:30:13,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:13,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1100404957, now seen corresponding path program 5 times [2024-06-20 17:30:13,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:13,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121937062] [2024-06-20 17:30:13,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:13,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:13,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:14,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:14,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:14,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121937062] [2024-06-20 17:30:14,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121937062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:14,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:14,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:30:14,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985504858] [2024-06-20 17:30:14,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:14,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:30:14,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:14,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:30:14,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:30:14,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:30:14,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 327 transitions, 5228 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:14,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:14,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:30:14,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:16,618 INFO L124 PetriNetUnfolderBase]: 6595/10288 cut-off events. [2024-06-20 17:30:16,619 INFO L125 PetriNetUnfolderBase]: For 903753/903759 co-relation queries the response was YES. [2024-06-20 17:30:16,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88544 conditions, 10288 events. 6595/10288 cut-off events. For 903753/903759 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 65450 event pairs, 2535 based on Foata normal form. 12/10299 useless extension candidates. Maximal degree in co-relation 88425. Up to 9986 conditions per place. [2024-06-20 17:30:16,757 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 298 selfloop transitions, 55 changer transitions 0/356 dead transitions. [2024-06-20 17:30:16,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 356 transitions, 6136 flow [2024-06-20 17:30:16,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:30:16,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:30:16,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-20 17:30:16,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421875 [2024-06-20 17:30:16,759 INFO L175 Difference]: Start difference. First operand has 239 places, 327 transitions, 5228 flow. Second operand 8 states and 135 transitions. [2024-06-20 17:30:16,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 356 transitions, 6136 flow [2024-06-20 17:30:18,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 356 transitions, 5995 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-20 17:30:18,299 INFO L231 Difference]: Finished difference. Result has 241 places, 330 transitions, 5351 flow [2024-06-20 17:30:18,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5087, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5351, PETRI_PLACES=241, PETRI_TRANSITIONS=330} [2024-06-20 17:30:18,299 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 200 predicate places. [2024-06-20 17:30:18,299 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 330 transitions, 5351 flow [2024-06-20 17:30:18,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:18,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:18,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:30:18,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 17:30:18,300 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:30:18,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:18,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1109601727, now seen corresponding path program 6 times [2024-06-20 17:30:18,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:18,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900390540] [2024-06-20 17:30:18,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:18,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:18,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:19,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:19,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:19,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900390540] [2024-06-20 17:30:19,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900390540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:19,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:19,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:30:19,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051918199] [2024-06-20 17:30:19,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:19,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:30:19,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:19,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:30:19,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:30:19,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:30:19,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 330 transitions, 5351 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:19,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:19,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:30:19,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:21,371 INFO L124 PetriNetUnfolderBase]: 6595/10288 cut-off events. [2024-06-20 17:30:21,371 INFO L125 PetriNetUnfolderBase]: For 909980/909986 co-relation queries the response was YES. [2024-06-20 17:30:21,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88279 conditions, 10288 events. 6595/10288 cut-off events. For 909980/909986 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 65225 event pairs, 2531 based on Foata normal form. 12/10299 useless extension candidates. Maximal degree in co-relation 88159. Up to 10137 conditions per place. [2024-06-20 17:30:21,486 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 324 selfloop transitions, 32 changer transitions 0/359 dead transitions. [2024-06-20 17:30:21,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 359 transitions, 6269 flow [2024-06-20 17:30:21,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:30:21,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:30:21,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-20 17:30:21,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-20 17:30:21,488 INFO L175 Difference]: Start difference. First operand has 241 places, 330 transitions, 5351 flow. Second operand 8 states and 132 transitions. [2024-06-20 17:30:21,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 359 transitions, 6269 flow [2024-06-20 17:30:22,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 359 transitions, 6027 flow, removed 70 selfloop flow, removed 6 redundant places. [2024-06-20 17:30:22,831 INFO L231 Difference]: Finished difference. Result has 243 places, 333 transitions, 5329 flow [2024-06-20 17:30:22,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5115, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5329, PETRI_PLACES=243, PETRI_TRANSITIONS=333} [2024-06-20 17:30:22,832 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 202 predicate places. [2024-06-20 17:30:22,832 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 333 transitions, 5329 flow [2024-06-20 17:30:22,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:22,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:22,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:30:22,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 17:30:22,833 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)] === [2024-06-20 17:30:22,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:22,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1410155700, now seen corresponding path program 2 times [2024-06-20 17:30:22,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:22,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429285502] [2024-06-20 17:30:22,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:22,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:22,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:23,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:23,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:23,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429285502] [2024-06-20 17:30:23,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429285502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:23,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:23,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:30:23,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265041662] [2024-06-20 17:30:23,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:23,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:30:23,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:23,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:30:23,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:30:23,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:30:23,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 333 transitions, 5329 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:23,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:23,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:30:23,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:25,845 INFO L124 PetriNetUnfolderBase]: 6605/10301 cut-off events. [2024-06-20 17:30:25,845 INFO L125 PetriNetUnfolderBase]: For 899206/899206 co-relation queries the response was YES. [2024-06-20 17:30:25,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87960 conditions, 10301 events. 6605/10301 cut-off events. For 899206/899206 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 65447 event pairs, 2543 based on Foata normal form. 2/10302 useless extension candidates. Maximal degree in co-relation 87839. Up to 10274 conditions per place. [2024-06-20 17:30:25,980 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 330 selfloop transitions, 17 changer transitions 0/350 dead transitions. [2024-06-20 17:30:25,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 350 transitions, 6126 flow [2024-06-20 17:30:25,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:30:25,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:30:25,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 101 transitions. [2024-06-20 17:30:25,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3607142857142857 [2024-06-20 17:30:25,981 INFO L175 Difference]: Start difference. First operand has 243 places, 333 transitions, 5329 flow. Second operand 7 states and 101 transitions. [2024-06-20 17:30:25,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 350 transitions, 6126 flow [2024-06-20 17:30:27,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 350 transitions, 5936 flow, removed 65 selfloop flow, removed 6 redundant places. [2024-06-20 17:30:27,428 INFO L231 Difference]: Finished difference. Result has 245 places, 339 transitions, 5268 flow [2024-06-20 17:30:27,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5139, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5268, PETRI_PLACES=245, PETRI_TRANSITIONS=339} [2024-06-20 17:30:27,433 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 204 predicate places. [2024-06-20 17:30:27,434 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 339 transitions, 5268 flow [2024-06-20 17:30:27,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:27,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:27,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:30:27,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 17:30:27,434 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)] === [2024-06-20 17:30:27,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:27,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1499114014, now seen corresponding path program 3 times [2024-06-20 17:30:27,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:27,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226497113] [2024-06-20 17:30:27,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:27,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:27,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:28,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:28,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:28,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226497113] [2024-06-20 17:30:28,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226497113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:28,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:28,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:30:28,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146897739] [2024-06-20 17:30:28,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:28,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:30:28,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:28,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:30:28,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:30:28,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:30:28,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 339 transitions, 5268 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:28,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:28,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:30:28,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:30,322 INFO L124 PetriNetUnfolderBase]: 6599/10296 cut-off events. [2024-06-20 17:30:30,322 INFO L125 PetriNetUnfolderBase]: For 917879/917881 co-relation queries the response was YES. [2024-06-20 17:30:30,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88186 conditions, 10296 events. 6599/10296 cut-off events. For 917879/917881 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 65442 event pairs, 2545 based on Foata normal form. 6/10301 useless extension candidates. Maximal degree in co-relation 88063. Up to 10200 conditions per place. [2024-06-20 17:30:30,482 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 315 selfloop transitions, 34 changer transitions 0/352 dead transitions. [2024-06-20 17:30:30,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 352 transitions, 6120 flow [2024-06-20 17:30:30,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:30:30,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:30:30,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-20 17:30:30,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 17:30:30,483 INFO L175 Difference]: Start difference. First operand has 245 places, 339 transitions, 5268 flow. Second operand 7 states and 112 transitions. [2024-06-20 17:30:30,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 352 transitions, 6120 flow [2024-06-20 17:30:32,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 352 transitions, 6058 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-20 17:30:32,081 INFO L231 Difference]: Finished difference. Result has 249 places, 339 transitions, 5284 flow [2024-06-20 17:30:32,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5206, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5284, PETRI_PLACES=249, PETRI_TRANSITIONS=339} [2024-06-20 17:30:32,084 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 208 predicate places. [2024-06-20 17:30:32,084 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 339 transitions, 5284 flow [2024-06-20 17:30:32,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:32,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:32,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:30:32,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 17:30:32,084 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)] === [2024-06-20 17:30:32,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:32,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1931031920, now seen corresponding path program 3 times [2024-06-20 17:30:32,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:32,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114170537] [2024-06-20 17:30:32,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:32,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:32,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:32,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:32,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:32,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114170537] [2024-06-20 17:30:32,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114170537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:32,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:32,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:30:32,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151394692] [2024-06-20 17:30:32,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:32,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:30:32,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:32,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:30:32,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:30:32,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:30:32,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 339 transitions, 5284 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:32,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:32,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:30:32,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:35,021 INFO L124 PetriNetUnfolderBase]: 6601/10297 cut-off events. [2024-06-20 17:30:35,021 INFO L125 PetriNetUnfolderBase]: For 939211/939211 co-relation queries the response was YES. [2024-06-20 17:30:35,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88671 conditions, 10297 events. 6601/10297 cut-off events. For 939211/939211 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 65411 event pairs, 2538 based on Foata normal form. 2/10298 useless extension candidates. Maximal degree in co-relation 88547. Up to 10257 conditions per place. [2024-06-20 17:30:35,131 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 328 selfloop transitions, 24 changer transitions 0/355 dead transitions. [2024-06-20 17:30:35,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 355 transitions, 6207 flow [2024-06-20 17:30:35,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:30:35,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:30:35,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 105 transitions. [2024-06-20 17:30:35,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-20 17:30:35,132 INFO L175 Difference]: Start difference. First operand has 249 places, 339 transitions, 5284 flow. Second operand 7 states and 105 transitions. [2024-06-20 17:30:35,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 355 transitions, 6207 flow [2024-06-20 17:30:36,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 355 transitions, 5894 flow, removed 19 selfloop flow, removed 10 redundant places. [2024-06-20 17:30:36,400 INFO L231 Difference]: Finished difference. Result has 246 places, 342 transitions, 5088 flow [2024-06-20 17:30:36,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4971, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5088, PETRI_PLACES=246, PETRI_TRANSITIONS=342} [2024-06-20 17:30:36,400 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 205 predicate places. [2024-06-20 17:30:36,400 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 342 transitions, 5088 flow [2024-06-20 17:30:36,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:36,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:36,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:30:36,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 17:30:36,401 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)] === [2024-06-20 17:30:36,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:36,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1492869808, now seen corresponding path program 1 times [2024-06-20 17:30:36,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:36,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215894598] [2024-06-20 17:30:36,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:36,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:36,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:37,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:37,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:37,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215894598] [2024-06-20 17:30:37,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215894598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:37,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:37,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:30:37,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250790674] [2024-06-20 17:30:37,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:37,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:30:37,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:37,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:30:37,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:30:37,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-20 17:30:37,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 342 transitions, 5088 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:37,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:37,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-20 17:30:37,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:39,458 INFO L124 PetriNetUnfolderBase]: 6631/10339 cut-off events. [2024-06-20 17:30:39,459 INFO L125 PetriNetUnfolderBase]: For 970757/970757 co-relation queries the response was YES. [2024-06-20 17:30:39,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88778 conditions, 10339 events. 6631/10339 cut-off events. For 970757/970757 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 65651 event pairs, 2537 based on Foata normal form. 6/10344 useless extension candidates. Maximal degree in co-relation 88655. Up to 10200 conditions per place. [2024-06-20 17:30:39,577 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 329 selfloop transitions, 34 changer transitions 0/366 dead transitions. [2024-06-20 17:30:39,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 366 transitions, 6124 flow [2024-06-20 17:30:39,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:30:39,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:30:39,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-20 17:30:39,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-06-20 17:30:39,578 INFO L175 Difference]: Start difference. First operand has 246 places, 342 transitions, 5088 flow. Second operand 8 states and 124 transitions. [2024-06-20 17:30:39,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 366 transitions, 6124 flow [2024-06-20 17:30:40,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 366 transitions, 6020 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-20 17:30:40,799 INFO L231 Difference]: Finished difference. Result has 249 places, 348 transitions, 5173 flow [2024-06-20 17:30:40,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4989, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5173, PETRI_PLACES=249, PETRI_TRANSITIONS=348} [2024-06-20 17:30:40,799 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 208 predicate places. [2024-06-20 17:30:40,800 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 348 transitions, 5173 flow [2024-06-20 17:30:40,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:40,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:40,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:30:40,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 17:30:40,800 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)] === [2024-06-20 17:30:40,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:40,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1410149748, now seen corresponding path program 2 times [2024-06-20 17:30:40,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:40,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311749326] [2024-06-20 17:30:40,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:40,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:40,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat