./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 958ec4d9 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/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-dev-958ec4d-m [2024-02-07 14:24:48,469 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-07 14:24:48,511 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-07 14:24:48,514 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-07 14:24:48,515 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-07 14:24:48,529 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-07 14:24:48,529 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-07 14:24:48,529 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-07 14:24:48,530 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-07 14:24:48,530 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-07 14:24:48,530 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-07 14:24:48,531 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-07 14:24:48,531 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-07 14:24:48,531 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-07 14:24:48,532 INFO L153 SettingsManager]: * Use SBE=true [2024-02-07 14:24:48,532 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-07 14:24:48,532 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-07 14:24:48,533 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-07 14:24:48,533 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-07 14:24:48,533 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-07 14:24:48,534 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-07 14:24:48,534 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-07 14:24:48,534 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-07 14:24:48,535 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-07 14:24:48,535 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-07 14:24:48,535 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-07 14:24:48,535 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-07 14:24:48,536 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-07 14:24:48,536 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-07 14:24:48,536 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-07 14:24:48,537 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-07 14:24:48,537 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-07 14:24:48,537 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:24:48,537 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-07 14:24:48,538 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-07 14:24:48,538 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-07 14:24:48,538 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-07 14:24:48,538 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-07 14:24:48,539 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-07 14:24:48,539 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-07 14:24:48,539 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-07 14:24:48,539 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-07 14:24:48,540 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-07 14:24:48,540 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-07 14:24:48,722 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-07 14:24:48,738 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-07 14:24:48,740 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-07 14:24:48,741 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-07 14:24:48,741 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-07 14:24:48,743 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-02-07 14:24:48,883 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-07 14:24:48,883 INFO L274 PluginConnector]: CDTParser initialized [2024-02-07 14:24:48,884 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-02-07 14:24:49,934 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-07 14:24:50,142 INFO L384 CDTParser]: Found 1 translation units. [2024-02-07 14:24:50,143 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-02-07 14:24:50,156 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a49bf1072/8b0186c61e2d469c81d002da93bb3482/FLAGfd66ac71d [2024-02-07 14:24:50,167 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a49bf1072/8b0186c61e2d469c81d002da93bb3482 [2024-02-07 14:24:50,168 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-07 14:24:50,171 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-07 14:24:50,172 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-07 14:24:50,172 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-07 14:24:50,176 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-07 14:24:50,176 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:24:48" (1/2) ... [2024-02-07 14:24:50,177 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4286bce1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:24:50, skipping insertion in model container [2024-02-07 14:24:50,177 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:24:48" (1/2) ... [2024-02-07 14:24:50,178 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1af0500a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:24:50, skipping insertion in model container [2024-02-07 14:24:50,178 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:24:50" (2/2) ... [2024-02-07 14:24:50,179 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4286bce1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:24:50, skipping insertion in model container [2024-02-07 14:24:50,179 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:24:50" (2/2) ... [2024-02-07 14:24:50,179 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-07 14:24:50,278 INFO L74 edCorrectnessWitness]: Found the following entries in the witness: [2024-02-07 14:24:50,279 INFO L76 edCorrectnessWitness]: Location invariant before [L765-L765] 0 <= __unbuffered_cnt [2024-02-07 14:24:50,279 INFO L76 edCorrectnessWitness]: Location invariant before [L736-L736] 1 <= __unbuffered_cnt [2024-02-07 14:24:50,279 INFO L76 edCorrectnessWitness]: Location invariant before [L735-L735] 0 <= __unbuffered_cnt [2024-02-07 14:24:50,279 INFO L76 edCorrectnessWitness]: Location invariant before [L18-L18] ((0 <= expression) && (expression <= 1)) && (expression == 0 || expression == 1) [2024-02-07 14:24:50,280 INFO L76 edCorrectnessWitness]: Location invariant before [L758-L758] (((0 <= __unbuffered_p2_EAX) && (__unbuffered_p2_EAX <= 2)) && (__unbuffered_p2_EAX <= 127)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2) [2024-02-07 14:24:50,280 INFO L76 edCorrectnessWitness]: Location invariant before [L746-L746] x == 2 [2024-02-07 14:24:50,281 INFO L76 edCorrectnessWitness]: Location invariant before [L731-L731] (((0 <= __unbuffered_p0_EAX) && (__unbuffered_p0_EAX <= 2)) && (__unbuffered_p0_EAX <= 127)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2) [2024-02-07 14:24:50,281 INFO L76 edCorrectnessWitness]: Location invariant before [L751-L751] 1 <= __unbuffered_cnt [2024-02-07 14:24:50,281 INFO L76 edCorrectnessWitness]: Location invariant before [L766-L766] 1 <= __unbuffered_cnt [2024-02-07 14:24:50,281 INFO L76 edCorrectnessWitness]: Location invariant before [L760-L760] ((0 <= y) && (y <= 1)) && (y == 0 || y == 1) [2024-02-07 14:24:50,281 INFO L76 edCorrectnessWitness]: Location invariant before [L726-L726] y == 1 [2024-02-07 14:24:50,281 INFO L76 edCorrectnessWitness]: Location invariant before [L757-L757] (((0 <= x) && (x <= 2)) && (x <= 127)) && ((x == 0 || x == 1) || x == 2) [2024-02-07 14:24:50,281 INFO L76 edCorrectnessWitness]: Location invariant before [L793-L793] ((((0 <= __unbuffered_p2_EBX) && (__unbuffered_p2_EBX <= 1)) && (x == 2)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && ((__unbuffered_p0_EAX == 0 && (__unbuffered_p2_EAX == 2 || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) || (((((((0 <= __unbuffered_p0_EAX && 0 <= __unbuffered_p2_EAX) && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) [2024-02-07 14:24:50,281 INFO L76 edCorrectnessWitness]: Location invariant before [L787-L787] 0 <= __unbuffered_cnt [2024-02-07 14:24:50,282 INFO L76 edCorrectnessWitness]: Location invariant before [L730-L730] (((0 <= x) && (x <= 2)) && (x <= 127)) && ((x == 0 || x == 1) || x == 2) [2024-02-07 14:24:50,282 INFO L76 edCorrectnessWitness]: Location invariant before [L788-L788] main$tmp_guard0 == (_Bool)0 || main$tmp_guard0 == (_Bool)1 [2024-02-07 14:24:50,282 INFO L76 edCorrectnessWitness]: Location invariant before [L795-L795] main$tmp_guard1 == (_Bool)0 || main$tmp_guard1 == (_Bool)1 [2024-02-07 14:24:50,282 INFO L76 edCorrectnessWitness]: Location invariant before [L750-L750] 0 <= __unbuffered_cnt [2024-02-07 14:24:50,282 INFO L76 edCorrectnessWitness]: Location invariant before [L794-L794] main$tmp_guard1 == (_Bool)0 || main$tmp_guard1 == (_Bool)1 [2024-02-07 14:24:50,282 INFO L76 edCorrectnessWitness]: Location invariant before [L761-L761] ((0 <= __unbuffered_p2_EBX) && (__unbuffered_p2_EBX <= 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) [2024-02-07 14:24:50,283 INFO L76 edCorrectnessWitness]: Location invariant before [L789-L789] main$tmp_guard0 == (_Bool)0 || main$tmp_guard0 == (_Bool)1 [2024-02-07 14:24:50,283 INFO L76 edCorrectnessWitness]: Location invariant before [L743-L743] x == 1 [2024-02-07 14:24:50,331 INFO L178 MainTranslator]: Built tables and reachable declarations [2024-02-07 14:24:50,459 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] [2024-02-07 14:24:50,603 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:24:50,615 INFO L203 MainTranslator]: Completed pre-run Start Parsing Local [2024-02-07 14:24:50,642 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-07 14:24:50,677 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:24:50,708 INFO L207 MainTranslator]: Completed translation [2024-02-07 14:24:50,709 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:24:50 WrapperNode [2024-02-07 14:24:50,709 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-07 14:24:50,710 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-07 14:24:50,710 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-07 14:24:50,710 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-07 14:24:50,715 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:24:50" (1/1) ... [2024-02-07 14:24:50,725 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:24:50" (1/1) ... [2024-02-07 14:24:50,743 INFO L138 Inliner]: procedures = 176, calls = 55, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 77 [2024-02-07 14:24:50,743 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-07 14:24:50,744 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-07 14:24:50,744 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-07 14:24:50,744 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-07 14:24:50,752 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:24:50" (1/1) ... [2024-02-07 14:24:50,752 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:24:50" (1/1) ... [2024-02-07 14:24:50,755 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:24:50" (1/1) ... [2024-02-07 14:24:50,767 INFO L175 MemorySlicer]: Split 5 memory accesses to 4 slices as follows [2, 1, 1, 1]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-02-07 14:24:50,768 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:24:50" (1/1) ... [2024-02-07 14:24:50,768 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:24:50" (1/1) ... [2024-02-07 14:24:50,789 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:24:50" (1/1) ... [2024-02-07 14:24:50,791 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:24:50" (1/1) ... [2024-02-07 14:24:50,796 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:24:50" (1/1) ... [2024-02-07 14:24:50,797 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:24:50" (1/1) ... [2024-02-07 14:24:50,799 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-07 14:24:50,800 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-07 14:24:50,800 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-07 14:24:50,801 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-07 14:24:50,801 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:24:50" (1/1) ... [2024-02-07 14:24:50,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:24:50,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:24:50,825 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) [2024-02-07 14:24:50,829 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 [2024-02-07 14:24:50,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-07 14:24:50,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-07 14:24:50,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-07 14:24:50,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-07 14:24:50,857 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-02-07 14:24:50,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-07 14:24:50,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-07 14:24:50,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-07 14:24:50,858 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-02-07 14:24:50,858 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-02-07 14:24:50,858 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-02-07 14:24:50,859 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-02-07 14:24:50,859 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-02-07 14:24:50,860 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-02-07 14:24:50,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-07 14:24:50,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-07 14:24:50,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-07 14:24:50,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-07 14:24:50,861 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-02-07 14:24:50,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-07 14:24:50,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-07 14:24:50,862 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-07 14:24:50,971 INFO L244 CfgBuilder]: Building ICFG [2024-02-07 14:24:50,974 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-07 14:24:51,221 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-07 14:24:51,221 INFO L293 CfgBuilder]: Performing block encoding [2024-02-07 14:24:51,332 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-07 14:24:51,333 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-02-07 14:24:51,333 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:24:51 BoogieIcfgContainer [2024-02-07 14:24:51,333 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-07 14:24:51,335 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-07 14:24:51,336 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-07 14:24:51,338 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-07 14:24:51,339 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:24:48" (1/4) ... [2024-02-07 14:24:51,339 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@578df9a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 02:24:51, skipping insertion in model container [2024-02-07 14:24:51,339 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 02:24:50" (2/4) ... [2024-02-07 14:24:51,340 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@578df9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 02:24:51, skipping insertion in model container [2024-02-07 14:24:51,340 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:24:50" (3/4) ... [2024-02-07 14:24:51,341 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@578df9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 02:24:51, skipping insertion in model container [2024-02-07 14:24:51,341 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:24:51" (4/4) ... [2024-02-07 14:24:51,343 INFO L112 eAbstractionObserver]: Analyzing ICFG safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-02-07 14:24:51,356 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-07 14:24:51,356 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 23 error locations. [2024-02-07 14:24:51,357 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-07 14:24:51,408 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-07 14:24:51,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 62 transitions, 136 flow [2024-02-07 14:24:51,480 INFO L124 PetriNetUnfolderBase]: 1/59 cut-off events. [2024-02-07 14:24:51,480 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 14:24:51,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 59 events. 1/59 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 190 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 61. Up to 2 conditions per place. [2024-02-07 14:24:51,483 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 62 transitions, 136 flow [2024-02-07 14:24:51,487 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 59 transitions, 127 flow [2024-02-07 14:24:51,498 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 14:24:51,507 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;@6b695694, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 14:24:51,507 INFO L358 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2024-02-07 14:24:51,512 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 14:24:51,513 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-02-07 14:24:51,513 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 14:24:51,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:24:51,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-02-07 14:24:51,515 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:24:51,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:24:51,522 INFO L85 PathProgramCache]: Analyzing trace with hash 9796008, now seen corresponding path program 1 times [2024-02-07 14:24:51,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:24:51,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429064954] [2024-02-07 14:24:51,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:24:51,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:24:51,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:24:51,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:24:51,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:24:51,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429064954] [2024-02-07 14:24:51,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429064954] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:24:51,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:24:51,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 14:24:51,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530677999] [2024-02-07 14:24:51,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:24:51,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-02-07 14:24:51,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:24:51,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-02-07 14:24:51,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-02-07 14:24:51,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 14:24:51,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 59 transitions, 127 flow. Second operand has 2 states, 2 states have (on average 19.5) internal successors, (39), 2 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:24:51,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:24:51,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 14:24:51,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:24:52,936 INFO L124 PetriNetUnfolderBase]: 7577/12719 cut-off events. [2024-02-07 14:24:52,936 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2024-02-07 14:24:52,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23524 conditions, 12719 events. 7577/12719 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 691. Compared 100073 event pairs, 7577 based on Foata normal form. 294/9000 useless extension candidates. Maximal degree in co-relation 23513. Up to 10701 conditions per place. [2024-02-07 14:24:53,030 INFO L140 encePairwiseOnDemand]: 50/62 looper letters, 32 selfloop transitions, 0 changer transitions 0/47 dead transitions. [2024-02-07 14:24:53,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 47 transitions, 167 flow [2024-02-07 14:24:53,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-02-07 14:24:53,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-02-07 14:24:53,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 80 transitions. [2024-02-07 14:24:53,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6451612903225806 [2024-02-07 14:24:53,042 INFO L175 Difference]: Start difference. First operand has 68 places, 59 transitions, 127 flow. Second operand 2 states and 80 transitions. [2024-02-07 14:24:53,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 47 transitions, 167 flow [2024-02-07 14:24:53,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 47 transitions, 164 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-02-07 14:24:53,052 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 100 flow [2024-02-07 14:24:53,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=100, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-02-07 14:24:53,056 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -13 predicate places. [2024-02-07 14:24:53,056 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 100 flow [2024-02-07 14:24:53,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 19.5) internal successors, (39), 2 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:24:53,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:24:53,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-02-07 14:24:53,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-07 14:24:53,057 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:24:53,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:24:53,058 INFO L85 PathProgramCache]: Analyzing trace with hash 824040298, now seen corresponding path program 1 times [2024-02-07 14:24:53,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:24:53,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473879899] [2024-02-07 14:24:53,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:24:53,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:24:53,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:24:53,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:24:53,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:24:53,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473879899] [2024-02-07 14:24:53,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473879899] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:24:53,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:24:53,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 14:24:53,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926201551] [2024-02-07 14:24:53,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:24:53,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:24:53,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:24:53,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:24:53,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:24:53,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 14:24:53,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:24:53,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:24:53,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 14:24:53,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:24:53,910 INFO L124 PetriNetUnfolderBase]: 6886/11760 cut-off events. [2024-02-07 14:24:53,911 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 14:24:53,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21612 conditions, 11760 events. 6886/11760 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 91841 event pairs, 1676 based on Foata normal form. 0/8246 useless extension candidates. Maximal degree in co-relation 21609. Up to 9072 conditions per place. [2024-02-07 14:24:53,974 INFO L140 encePairwiseOnDemand]: 57/62 looper letters, 48 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2024-02-07 14:24:53,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 65 transitions, 238 flow [2024-02-07 14:24:53,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:24:53,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:24:53,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2024-02-07 14:24:53,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5752688172043011 [2024-02-07 14:24:53,977 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 100 flow. Second operand 3 states and 107 transitions. [2024-02-07 14:24:53,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 65 transitions, 238 flow [2024-02-07 14:24:53,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 65 transitions, 238 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-07 14:24:53,979 INFO L231 Difference]: Finished difference. Result has 58 places, 47 transitions, 112 flow [2024-02-07 14:24:53,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=58, PETRI_TRANSITIONS=47} [2024-02-07 14:24:53,980 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -10 predicate places. [2024-02-07 14:24:53,980 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 47 transitions, 112 flow [2024-02-07 14:24:53,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:24:53,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:24:53,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:24:53,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-07 14:24:53,981 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:24:53,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:24:53,982 INFO L85 PathProgramCache]: Analyzing trace with hash 226761029, now seen corresponding path program 1 times [2024-02-07 14:24:53,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:24:53,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670744815] [2024-02-07 14:24:53,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:24:53,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:24:53,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:24:54,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:24:54,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:24:54,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670744815] [2024-02-07 14:24:54,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670744815] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:24:54,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:24:54,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 14:24:54,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603397360] [2024-02-07 14:24:54,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:24:54,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:24:54,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:24:54,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:24:54,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:24:54,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 14:24:54,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 47 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 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) [2024-02-07 14:24:54,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:24:54,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 14:24:54,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:24:54,592 INFO L124 PetriNetUnfolderBase]: 5260/7936 cut-off events. [2024-02-07 14:24:54,592 INFO L125 PetriNetUnfolderBase]: For 940/940 co-relation queries the response was YES. [2024-02-07 14:24:54,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16743 conditions, 7936 events. 5260/7936 cut-off events. For 940/940 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 49377 event pairs, 1730 based on Foata normal form. 0/6657 useless extension candidates. Maximal degree in co-relation 16738. Up to 6367 conditions per place. [2024-02-07 14:24:54,635 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 51 selfloop transitions, 4 changer transitions 0/70 dead transitions. [2024-02-07 14:24:54,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 70 transitions, 281 flow [2024-02-07 14:24:54,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:24:54,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:24:54,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 113 transitions. [2024-02-07 14:24:54,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6075268817204301 [2024-02-07 14:24:54,641 INFO L175 Difference]: Start difference. First operand has 58 places, 47 transitions, 112 flow. Second operand 3 states and 113 transitions. [2024-02-07 14:24:54,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 70 transitions, 281 flow [2024-02-07 14:24:54,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 70 transitions, 275 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 14:24:54,643 INFO L231 Difference]: Finished difference. Result has 59 places, 50 transitions, 140 flow [2024-02-07 14:24:54,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=59, PETRI_TRANSITIONS=50} [2024-02-07 14:24:54,645 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -9 predicate places. [2024-02-07 14:24:54,646 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 50 transitions, 140 flow [2024-02-07 14:24:54,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 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) [2024-02-07 14:24:54,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:24:54,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:24:54,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-07 14:24:54,647 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:24:54,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:24:54,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1560342343, now seen corresponding path program 1 times [2024-02-07 14:24:54,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:24:54,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235906042] [2024-02-07 14:24:54,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:24:54,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:24:54,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:24:54,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:24:54,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:24:54,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235906042] [2024-02-07 14:24:54,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235906042] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:24:54,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:24:54,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:24:54,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382724617] [2024-02-07 14:24:54,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:24:54,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:24:54,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:24:54,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:24:54,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:24:54,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 62 [2024-02-07 14:24:54,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 50 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:24:54,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:24:54,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 62 [2024-02-07 14:24:54,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:24:55,478 INFO L124 PetriNetUnfolderBase]: 5260/8926 cut-off events. [2024-02-07 14:24:55,479 INFO L125 PetriNetUnfolderBase]: For 1669/1669 co-relation queries the response was YES. [2024-02-07 14:24:55,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19742 conditions, 8926 events. 5260/8926 cut-off events. For 1669/1669 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 66671 event pairs, 4956 based on Foata normal form. 0/7403 useless extension candidates. Maximal degree in co-relation 19736. Up to 7559 conditions per place. [2024-02-07 14:24:55,524 INFO L140 encePairwiseOnDemand]: 60/62 looper letters, 34 selfloop transitions, 1 changer transitions 0/49 dead transitions. [2024-02-07 14:24:55,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 49 transitions, 208 flow [2024-02-07 14:24:55,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:24:55,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:24:55,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2024-02-07 14:24:55,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2024-02-07 14:24:55,527 INFO L175 Difference]: Start difference. First operand has 59 places, 50 transitions, 140 flow. Second operand 3 states and 84 transitions. [2024-02-07 14:24:55,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 49 transitions, 208 flow [2024-02-07 14:24:55,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 49 transitions, 204 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:24:55,529 INFO L231 Difference]: Finished difference. Result has 59 places, 49 transitions, 136 flow [2024-02-07 14:24:55,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=59, PETRI_TRANSITIONS=49} [2024-02-07 14:24:55,531 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -9 predicate places. [2024-02-07 14:24:55,531 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 49 transitions, 136 flow [2024-02-07 14:24:55,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:24:55,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:24:55,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:24:55,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-07 14:24:55,532 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting P2Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:24:55,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:24:55,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1560298733, now seen corresponding path program 1 times [2024-02-07 14:24:55,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:24:55,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78161119] [2024-02-07 14:24:55,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:24:55,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:24:55,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:24:55,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:24:55,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:24:55,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78161119] [2024-02-07 14:24:55,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78161119] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:24:55,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:24:55,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 14:24:55,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813144814] [2024-02-07 14:24:55,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:24:55,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:24:55,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:24:55,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:24:55,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:24:55,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 14:24:55,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 49 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 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) [2024-02-07 14:24:55,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:24:55,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 14:24:55,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:24:56,172 INFO L124 PetriNetUnfolderBase]: 5157/8016 cut-off events. [2024-02-07 14:24:56,172 INFO L125 PetriNetUnfolderBase]: For 1578/1578 co-relation queries the response was YES. [2024-02-07 14:24:56,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18317 conditions, 8016 events. 5157/8016 cut-off events. For 1578/1578 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 52011 event pairs, 1453 based on Foata normal form. 0/7071 useless extension candidates. Maximal degree in co-relation 18311. Up to 6730 conditions per place. [2024-02-07 14:24:56,215 INFO L140 encePairwiseOnDemand]: 59/62 looper letters, 58 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2024-02-07 14:24:56,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 74 transitions, 329 flow [2024-02-07 14:24:56,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:24:56,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:24:56,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 110 transitions. [2024-02-07 14:24:56,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5913978494623656 [2024-02-07 14:24:56,216 INFO L175 Difference]: Start difference. First operand has 59 places, 49 transitions, 136 flow. Second operand 3 states and 110 transitions. [2024-02-07 14:24:56,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 74 transitions, 329 flow [2024-02-07 14:24:56,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 74 transitions, 328 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:24:56,219 INFO L231 Difference]: Finished difference. Result has 61 places, 49 transitions, 143 flow [2024-02-07 14:24:56,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=143, PETRI_PLACES=61, PETRI_TRANSITIONS=49} [2024-02-07 14:24:56,220 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -7 predicate places. [2024-02-07 14:24:56,221 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 49 transitions, 143 flow [2024-02-07 14:24:56,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 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) [2024-02-07 14:24:56,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:24:56,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:24:56,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-07 14:24:56,221 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:24:56,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:24:56,222 INFO L85 PathProgramCache]: Analyzing trace with hash -412014221, now seen corresponding path program 1 times [2024-02-07 14:24:56,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:24:56,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778232312] [2024-02-07 14:24:56,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:24:56,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:24:56,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:24:56,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:24:56,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:24:56,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778232312] [2024-02-07 14:24:56,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778232312] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:24:56,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:24:56,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:24:56,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046413539] [2024-02-07 14:24:56,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:24:56,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:24:56,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:24:56,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:24:56,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:24:56,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 14:24:56,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 49 transitions, 143 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 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) [2024-02-07 14:24:56,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:24:56,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 14:24:56,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:24:56,716 INFO L124 PetriNetUnfolderBase]: 4625/7749 cut-off events. [2024-02-07 14:24:56,717 INFO L125 PetriNetUnfolderBase]: For 1943/1943 co-relation queries the response was YES. [2024-02-07 14:24:56,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17829 conditions, 7749 events. 4625/7749 cut-off events. For 1943/1943 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 55997 event pairs, 3871 based on Foata normal form. 94/6751 useless extension candidates. Maximal degree in co-relation 17822. Up to 6020 conditions per place. [2024-02-07 14:24:56,764 INFO L140 encePairwiseOnDemand]: 57/62 looper letters, 53 selfloop transitions, 2 changer transitions 0/69 dead transitions. [2024-02-07 14:24:56,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 69 transitions, 314 flow [2024-02-07 14:24:56,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:24:56,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:24:56,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2024-02-07 14:24:56,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5752688172043011 [2024-02-07 14:24:56,766 INFO L175 Difference]: Start difference. First operand has 61 places, 49 transitions, 143 flow. Second operand 3 states and 107 transitions. [2024-02-07 14:24:56,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 69 transitions, 314 flow [2024-02-07 14:24:56,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 69 transitions, 308 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 14:24:56,769 INFO L231 Difference]: Finished difference. Result has 62 places, 49 transitions, 151 flow [2024-02-07 14:24:56,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=151, PETRI_PLACES=62, PETRI_TRANSITIONS=49} [2024-02-07 14:24:56,772 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -6 predicate places. [2024-02-07 14:24:56,772 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 49 transitions, 151 flow [2024-02-07 14:24:56,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 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) [2024-02-07 14:24:56,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:24:56,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:24:56,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-07 14:24:56,773 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting P2Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:24:56,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:24:56,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1262033167, now seen corresponding path program 1 times [2024-02-07 14:24:56,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:24:56,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473736937] [2024-02-07 14:24:56,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:24:56,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:24:56,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:24:56,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:24:56,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:24:56,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473736937] [2024-02-07 14:24:56,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473736937] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:24:56,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:24:56,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:24:56,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714569078] [2024-02-07 14:24:56,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:24:56,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:24:56,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:24:56,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:24:56,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:24:56,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 14:24:56,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 49 transitions, 151 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:24:56,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:24:56,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 14:24:56,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:24:57,187 INFO L124 PetriNetUnfolderBase]: 4118/6489 cut-off events. [2024-02-07 14:24:57,187 INFO L125 PetriNetUnfolderBase]: For 3149/3149 co-relation queries the response was YES. [2024-02-07 14:24:57,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16258 conditions, 6489 events. 4118/6489 cut-off events. For 3149/3149 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 41165 event pairs, 1120 based on Foata normal form. 212/6051 useless extension candidates. Maximal degree in co-relation 16250. Up to 5342 conditions per place. [2024-02-07 14:24:57,231 INFO L140 encePairwiseOnDemand]: 60/62 looper letters, 58 selfloop transitions, 1 changer transitions 0/73 dead transitions. [2024-02-07 14:24:57,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 73 transitions, 348 flow [2024-02-07 14:24:57,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:24:57,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:24:57,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 109 transitions. [2024-02-07 14:24:57,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5860215053763441 [2024-02-07 14:24:57,233 INFO L175 Difference]: Start difference. First operand has 62 places, 49 transitions, 151 flow. Second operand 3 states and 109 transitions. [2024-02-07 14:24:57,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 73 transitions, 348 flow [2024-02-07 14:24:57,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 73 transitions, 338 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-02-07 14:24:57,235 INFO L231 Difference]: Finished difference. Result has 60 places, 48 transitions, 143 flow [2024-02-07 14:24:57,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=143, PETRI_PLACES=60, PETRI_TRANSITIONS=48} [2024-02-07 14:24:57,236 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -8 predicate places. [2024-02-07 14:24:57,236 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 48 transitions, 143 flow [2024-02-07 14:24:57,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:24:57,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:24:57,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:24:57,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-07 14:24:57,237 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:24:57,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:24:57,237 INFO L85 PathProgramCache]: Analyzing trace with hash 112877440, now seen corresponding path program 1 times [2024-02-07 14:24:57,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:24:57,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424334581] [2024-02-07 14:24:57,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:24:57,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:24:57,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:24:57,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:24:57,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:24:57,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424334581] [2024-02-07 14:24:57,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424334581] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:24:57,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:24:57,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:24:57,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629078869] [2024-02-07 14:24:57,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:24:57,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:24:57,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:24:57,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:24:57,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:24:57,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 14:24:57,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 48 transitions, 143 flow. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 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) [2024-02-07 14:24:57,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:24:57,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 14:24:57,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:24:57,570 INFO L124 PetriNetUnfolderBase]: 3252/5403 cut-off events. [2024-02-07 14:24:57,571 INFO L125 PetriNetUnfolderBase]: For 2149/2163 co-relation queries the response was YES. [2024-02-07 14:24:57,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12433 conditions, 5403 events. 3252/5403 cut-off events. For 2149/2163 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 35373 event pairs, 1334 based on Foata normal form. 350/4998 useless extension candidates. Maximal degree in co-relation 12426. Up to 3712 conditions per place. [2024-02-07 14:24:57,594 INFO L140 encePairwiseOnDemand]: 59/62 looper letters, 50 selfloop transitions, 1 changer transitions 0/65 dead transitions. [2024-02-07 14:24:57,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 65 transitions, 289 flow [2024-02-07 14:24:57,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:24:57,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:24:57,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 102 transitions. [2024-02-07 14:24:57,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5483870967741935 [2024-02-07 14:24:57,596 INFO L175 Difference]: Start difference. First operand has 60 places, 48 transitions, 143 flow. Second operand 3 states and 102 transitions. [2024-02-07 14:24:57,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 65 transitions, 289 flow [2024-02-07 14:24:57,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 65 transitions, 287 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:24:57,597 INFO L231 Difference]: Finished difference. Result has 59 places, 46 transitions, 132 flow [2024-02-07 14:24:57,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=59, PETRI_TRANSITIONS=46} [2024-02-07 14:24:57,598 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -9 predicate places. [2024-02-07 14:24:57,598 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 46 transitions, 132 flow [2024-02-07 14:24:57,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 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) [2024-02-07 14:24:57,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:24:57,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:24:57,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-07 14:24:57,599 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:24:57,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:24:57,599 INFO L85 PathProgramCache]: Analyzing trace with hash -545395974, now seen corresponding path program 1 times [2024-02-07 14:24:57,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:24:57,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414610204] [2024-02-07 14:24:57,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:24:57,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:24:57,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:24:57,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:24:57,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:24:57,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414610204] [2024-02-07 14:24:57,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414610204] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:24:57,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:24:57,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 14:24:57,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932473138] [2024-02-07 14:24:57,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:24:57,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:24:57,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:24:57,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:24:57,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:24:57,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 62 [2024-02-07 14:24:57,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 46 transitions, 132 flow. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:24:57,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:24:57,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 62 [2024-02-07 14:24:57,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:24:57,988 INFO L124 PetriNetUnfolderBase]: 3205/5636 cut-off events. [2024-02-07 14:24:57,988 INFO L125 PetriNetUnfolderBase]: For 1253/1253 co-relation queries the response was YES. [2024-02-07 14:24:57,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12867 conditions, 5636 events. 3205/5636 cut-off events. For 1253/1253 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 39589 event pairs, 597 based on Foata normal form. 179/4989 useless extension candidates. Maximal degree in co-relation 12860. Up to 2593 conditions per place. [2024-02-07 14:24:58,022 INFO L140 encePairwiseOnDemand]: 56/62 looper letters, 54 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2024-02-07 14:24:58,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 73 transitions, 332 flow [2024-02-07 14:24:58,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:24:58,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:24:58,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 129 transitions. [2024-02-07 14:24:58,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5201612903225806 [2024-02-07 14:24:58,024 INFO L175 Difference]: Start difference. First operand has 59 places, 46 transitions, 132 flow. Second operand 4 states and 129 transitions. [2024-02-07 14:24:58,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 73 transitions, 332 flow [2024-02-07 14:24:58,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 73 transitions, 329 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:24:58,029 INFO L231 Difference]: Finished difference. Result has 63 places, 47 transitions, 157 flow [2024-02-07 14:24:58,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=157, PETRI_PLACES=63, PETRI_TRANSITIONS=47} [2024-02-07 14:24:58,030 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -5 predicate places. [2024-02-07 14:24:58,030 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 47 transitions, 157 flow [2024-02-07 14:24:58,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:24:58,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:24:58,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:24:58,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-02-07 14:24:58,031 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:24:58,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:24:58,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1747831809, now seen corresponding path program 1 times [2024-02-07 14:24:58,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:24:58,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124906419] [2024-02-07 14:24:58,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:24:58,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:24:58,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:24:58,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:24:58,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:24:58,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124906419] [2024-02-07 14:24:58,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124906419] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:24:58,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:24:58,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:24:58,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299208432] [2024-02-07 14:24:58,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:24:58,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:24:58,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:24:58,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:24:58,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:24:58,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 14:24:58,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 47 transitions, 157 flow. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:24:58,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:24:58,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 14:24:58,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:24:58,287 INFO L124 PetriNetUnfolderBase]: 1852/3275 cut-off events. [2024-02-07 14:24:58,287 INFO L125 PetriNetUnfolderBase]: For 1472/1484 co-relation queries the response was YES. [2024-02-07 14:24:58,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7951 conditions, 3275 events. 1852/3275 cut-off events. For 1472/1484 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 20585 event pairs, 792 based on Foata normal form. 98/3223 useless extension candidates. Maximal degree in co-relation 7942. Up to 2510 conditions per place. [2024-02-07 14:24:58,309 INFO L140 encePairwiseOnDemand]: 55/62 looper letters, 35 selfloop transitions, 3 changer transitions 2/54 dead transitions. [2024-02-07 14:24:58,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 54 transitions, 252 flow [2024-02-07 14:24:58,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:24:58,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:24:58,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2024-02-07 14:24:58,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5268817204301075 [2024-02-07 14:24:58,310 INFO L175 Difference]: Start difference. First operand has 63 places, 47 transitions, 157 flow. Second operand 3 states and 98 transitions. [2024-02-07 14:24:58,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 54 transitions, 252 flow [2024-02-07 14:24:58,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 54 transitions, 246 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 14:24:58,313 INFO L231 Difference]: Finished difference. Result has 59 places, 41 transitions, 135 flow [2024-02-07 14:24:58,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=59, PETRI_TRANSITIONS=41} [2024-02-07 14:24:58,314 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -9 predicate places. [2024-02-07 14:24:58,315 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 41 transitions, 135 flow [2024-02-07 14:24:58,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:24:58,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:24:58,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:24:58,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-02-07 14:24:58,315 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:24:58,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:24:58,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1769238206, now seen corresponding path program 1 times [2024-02-07 14:24:58,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:24:58,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517944716] [2024-02-07 14:24:58,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:24:58,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:24:58,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:24:58,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:24:58,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:24:58,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517944716] [2024-02-07 14:24:58,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517944716] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:24:58,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:24:58,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:24:58,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101902359] [2024-02-07 14:24:58,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:24:58,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:24:58,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:24:58,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:24:58,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:24:58,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 14:24:58,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 41 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:24:58,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:24:58,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 14:24:58,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:24:58,650 INFO L124 PetriNetUnfolderBase]: 1497/2716 cut-off events. [2024-02-07 14:24:58,650 INFO L125 PetriNetUnfolderBase]: For 1194/1194 co-relation queries the response was YES. [2024-02-07 14:24:58,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6501 conditions, 2716 events. 1497/2716 cut-off events. For 1194/1194 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 16802 event pairs, 678 based on Foata normal form. 4/2612 useless extension candidates. Maximal degree in co-relation 6492. Up to 2109 conditions per place. [2024-02-07 14:24:58,664 INFO L140 encePairwiseOnDemand]: 57/62 looper letters, 43 selfloop transitions, 6 changer transitions 0/63 dead transitions. [2024-02-07 14:24:58,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 63 transitions, 306 flow [2024-02-07 14:24:58,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:24:58,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:24:58,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 119 transitions. [2024-02-07 14:24:58,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4798387096774194 [2024-02-07 14:24:58,666 INFO L175 Difference]: Start difference. First operand has 59 places, 41 transitions, 135 flow. Second operand 4 states and 119 transitions. [2024-02-07 14:24:58,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 63 transitions, 306 flow [2024-02-07 14:24:58,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 63 transitions, 283 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-02-07 14:24:58,668 INFO L231 Difference]: Finished difference. Result has 60 places, 46 transitions, 159 flow [2024-02-07 14:24:58,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=159, PETRI_PLACES=60, PETRI_TRANSITIONS=46} [2024-02-07 14:24:58,669 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -8 predicate places. [2024-02-07 14:24:58,669 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 46 transitions, 159 flow [2024-02-07 14:24:58,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:24:58,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:24:58,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:24:58,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-02-07 14:24:58,670 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:24:58,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:24:58,670 INFO L85 PathProgramCache]: Analyzing trace with hash -2130606683, now seen corresponding path program 1 times [2024-02-07 14:24:58,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:24:58,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240662426] [2024-02-07 14:24:58,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:24:58,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:24:58,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:24:58,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:24:58,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:24:58,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240662426] [2024-02-07 14:24:58,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240662426] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:24:58,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:24:58,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-07 14:24:58,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700779390] [2024-02-07 14:24:58,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:24:58,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 14:24:58,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:24:58,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 14:24:58,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-02-07 14:24:58,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 62 [2024-02-07 14:24:58,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 46 transitions, 159 flow. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:24:58,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:24:58,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 62 [2024-02-07 14:24:58,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:24:58,940 INFO L124 PetriNetUnfolderBase]: 1127/2044 cut-off events. [2024-02-07 14:24:58,940 INFO L125 PetriNetUnfolderBase]: For 802/802 co-relation queries the response was YES. [2024-02-07 14:24:58,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5080 conditions, 2044 events. 1127/2044 cut-off events. For 802/802 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 11560 event pairs, 125 based on Foata normal form. 98/2058 useless extension candidates. Maximal degree in co-relation 5071. Up to 593 conditions per place. [2024-02-07 14:24:58,949 INFO L140 encePairwiseOnDemand]: 56/62 looper letters, 64 selfloop transitions, 8 changer transitions 1/87 dead transitions. [2024-02-07 14:24:58,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 87 transitions, 445 flow [2024-02-07 14:24:58,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 14:24:58,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 14:24:58,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-02-07 14:24:58,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4935483870967742 [2024-02-07 14:24:58,951 INFO L175 Difference]: Start difference. First operand has 60 places, 46 transitions, 159 flow. Second operand 5 states and 153 transitions. [2024-02-07 14:24:58,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 87 transitions, 445 flow [2024-02-07 14:24:58,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 87 transitions, 438 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-02-07 14:24:58,954 INFO L231 Difference]: Finished difference. Result has 65 places, 49 transitions, 202 flow [2024-02-07 14:24:58,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=202, PETRI_PLACES=65, PETRI_TRANSITIONS=49} [2024-02-07 14:24:58,954 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -3 predicate places. [2024-02-07 14:24:58,954 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 49 transitions, 202 flow [2024-02-07 14:24:58,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:24:58,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:24:58,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:24:58,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-02-07 14:24:58,955 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:24:58,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:24:58,955 INFO L85 PathProgramCache]: Analyzing trace with hash 199267297, now seen corresponding path program 1 times [2024-02-07 14:24:58,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:24:58,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833050736] [2024-02-07 14:24:58,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:24:58,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:24:58,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:24:59,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:24:59,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:24:59,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833050736] [2024-02-07 14:24:59,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833050736] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:24:59,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:24:59,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-07 14:24:59,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437757446] [2024-02-07 14:24:59,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:24:59,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 14:24:59,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:24:59,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 14:24:59,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-02-07 14:24:59,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 14:24:59,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 49 transitions, 202 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:24:59,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:24:59,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 14:24:59,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:24:59,310 INFO L124 PetriNetUnfolderBase]: 1095/2106 cut-off events. [2024-02-07 14:24:59,310 INFO L125 PetriNetUnfolderBase]: For 1740/1740 co-relation queries the response was YES. [2024-02-07 14:24:59,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5553 conditions, 2106 events. 1095/2106 cut-off events. For 1740/1740 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 12533 event pairs, 451 based on Foata normal form. 8/2030 useless extension candidates. Maximal degree in co-relation 5542. Up to 1341 conditions per place. [2024-02-07 14:24:59,335 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 83 selfloop transitions, 11 changer transitions 0/108 dead transitions. [2024-02-07 14:24:59,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 108 transitions, 663 flow [2024-02-07 14:24:59,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:24:59,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:24:59,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-02-07 14:24:59,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4700460829493088 [2024-02-07 14:24:59,337 INFO L175 Difference]: Start difference. First operand has 65 places, 49 transitions, 202 flow. Second operand 7 states and 204 transitions. [2024-02-07 14:24:59,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 108 transitions, 663 flow [2024-02-07 14:24:59,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 108 transitions, 592 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-02-07 14:24:59,341 INFO L231 Difference]: Finished difference. Result has 72 places, 58 transitions, 273 flow [2024-02-07 14:24:59,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=273, PETRI_PLACES=72, PETRI_TRANSITIONS=58} [2024-02-07 14:24:59,342 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 4 predicate places. [2024-02-07 14:24:59,342 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 58 transitions, 273 flow [2024-02-07 14:24:59,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:24:59,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:24:59,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:24:59,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-02-07 14:24:59,343 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:24:59,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:24:59,343 INFO L85 PathProgramCache]: Analyzing trace with hash 400476591, now seen corresponding path program 2 times [2024-02-07 14:24:59,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:24:59,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115601612] [2024-02-07 14:24:59,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:24:59,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:24:59,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:24:59,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:24:59,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:24:59,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115601612] [2024-02-07 14:24:59,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115601612] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:24:59,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:24:59,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-07 14:24:59,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491791465] [2024-02-07 14:24:59,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:24:59,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:24:59,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:24:59,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:24:59,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:24:59,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 14:24:59,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 58 transitions, 273 flow. Second operand has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:24:59,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:24:59,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 14:24:59,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:24:59,855 INFO L124 PetriNetUnfolderBase]: 1287/2453 cut-off events. [2024-02-07 14:24:59,855 INFO L125 PetriNetUnfolderBase]: For 2235/2235 co-relation queries the response was YES. [2024-02-07 14:24:59,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6998 conditions, 2453 events. 1287/2453 cut-off events. For 2235/2235 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 15149 event pairs, 500 based on Foata normal form. 8/2362 useless extension candidates. Maximal degree in co-relation 6983. Up to 1441 conditions per place. [2024-02-07 14:24:59,869 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 95 selfloop transitions, 27 changer transitions 0/136 dead transitions. [2024-02-07 14:24:59,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 136 transitions, 849 flow [2024-02-07 14:24:59,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-07 14:24:59,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-07 14:24:59,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 263 transitions. [2024-02-07 14:24:59,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.471326164874552 [2024-02-07 14:24:59,871 INFO L175 Difference]: Start difference. First operand has 72 places, 58 transitions, 273 flow. Second operand 9 states and 263 transitions. [2024-02-07 14:24:59,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 136 transitions, 849 flow [2024-02-07 14:24:59,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 136 transitions, 829 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-02-07 14:24:59,876 INFO L231 Difference]: Finished difference. Result has 84 places, 73 transitions, 448 flow [2024-02-07 14:24:59,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=448, PETRI_PLACES=84, PETRI_TRANSITIONS=73} [2024-02-07 14:24:59,876 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 16 predicate places. [2024-02-07 14:24:59,876 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 73 transitions, 448 flow [2024-02-07 14:24:59,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:24:59,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:24:59,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:24:59,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-02-07 14:24:59,877 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:24:59,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:24:59,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1983091119, now seen corresponding path program 3 times [2024-02-07 14:24:59,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:24:59,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734256956] [2024-02-07 14:24:59,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:24:59,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:24:59,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:25:00,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:25:00,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:25:00,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734256956] [2024-02-07 14:25:00,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734256956] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:25:00,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:25:00,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-07 14:25:00,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545150231] [2024-02-07 14:25:00,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:25:00,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 14:25:00,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:25:00,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 14:25:00,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-02-07 14:25:00,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 14:25:00,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 73 transitions, 448 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:00,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:25:00,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 14:25:00,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:25:00,325 INFO L124 PetriNetUnfolderBase]: 1393/2657 cut-off events. [2024-02-07 14:25:00,325 INFO L125 PetriNetUnfolderBase]: For 4635/4635 co-relation queries the response was YES. [2024-02-07 14:25:00,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8500 conditions, 2657 events. 1393/2657 cut-off events. For 4635/4635 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 16649 event pairs, 564 based on Foata normal form. 8/2550 useless extension candidates. Maximal degree in co-relation 8480. Up to 1765 conditions per place. [2024-02-07 14:25:00,341 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 92 selfloop transitions, 24 changer transitions 0/130 dead transitions. [2024-02-07 14:25:00,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 130 transitions, 946 flow [2024-02-07 14:25:00,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:25:00,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:25:00,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 212 transitions. [2024-02-07 14:25:00,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48847926267281105 [2024-02-07 14:25:00,343 INFO L175 Difference]: Start difference. First operand has 84 places, 73 transitions, 448 flow. Second operand 7 states and 212 transitions. [2024-02-07 14:25:00,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 130 transitions, 946 flow [2024-02-07 14:25:00,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 130 transitions, 932 flow, removed 7 selfloop flow, removed 0 redundant places. [2024-02-07 14:25:00,354 INFO L231 Difference]: Finished difference. Result has 94 places, 81 transitions, 599 flow [2024-02-07 14:25:00,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=599, PETRI_PLACES=94, PETRI_TRANSITIONS=81} [2024-02-07 14:25:00,355 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 26 predicate places. [2024-02-07 14:25:00,355 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 81 transitions, 599 flow [2024-02-07 14:25:00,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:00,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:25:00,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:25:00,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-02-07 14:25:00,356 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:25:00,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:25:00,356 INFO L85 PathProgramCache]: Analyzing trace with hash 171230036, now seen corresponding path program 1 times [2024-02-07 14:25:00,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:25:00,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759767173] [2024-02-07 14:25:00,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:25:00,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:25:00,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:25:00,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:25:00,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:25:00,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759767173] [2024-02-07 14:25:00,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759767173] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:25:00,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:25:00,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-07 14:25:00,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953399748] [2024-02-07 14:25:00,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:25:00,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 14:25:00,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:25:00,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 14:25:00,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-02-07 14:25:00,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 14:25:00,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 81 transitions, 599 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:00,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:25:00,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 14:25:00,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:25:00,815 INFO L124 PetriNetUnfolderBase]: 1505/2882 cut-off events. [2024-02-07 14:25:00,815 INFO L125 PetriNetUnfolderBase]: For 7085/7085 co-relation queries the response was YES. [2024-02-07 14:25:00,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9863 conditions, 2882 events. 1505/2882 cut-off events. For 7085/7085 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 18480 event pairs, 355 based on Foata normal form. 4/2760 useless extension candidates. Maximal degree in co-relation 9838. Up to 1876 conditions per place. [2024-02-07 14:25:00,834 INFO L140 encePairwiseOnDemand]: 56/62 looper letters, 96 selfloop transitions, 20 changer transitions 0/130 dead transitions. [2024-02-07 14:25:00,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 130 transitions, 1067 flow [2024-02-07 14:25:00,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:25:00,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:25:00,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-02-07 14:25:00,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4631336405529954 [2024-02-07 14:25:00,836 INFO L175 Difference]: Start difference. First operand has 94 places, 81 transitions, 599 flow. Second operand 7 states and 201 transitions. [2024-02-07 14:25:00,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 130 transitions, 1067 flow [2024-02-07 14:25:00,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 130 transitions, 1044 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-02-07 14:25:00,847 INFO L231 Difference]: Finished difference. Result has 101 places, 90 transitions, 711 flow [2024-02-07 14:25:00,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=576, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=711, PETRI_PLACES=101, PETRI_TRANSITIONS=90} [2024-02-07 14:25:00,847 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 33 predicate places. [2024-02-07 14:25:00,847 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 90 transitions, 711 flow [2024-02-07 14:25:00,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:00,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:25:00,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:25:00,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-02-07 14:25:00,848 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:25:00,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:25:00,849 INFO L85 PathProgramCache]: Analyzing trace with hash -2121896142, now seen corresponding path program 2 times [2024-02-07 14:25:00,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:25:00,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722284590] [2024-02-07 14:25:00,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:25:00,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:25:00,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:25:00,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:25:00,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:25:00,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722284590] [2024-02-07 14:25:00,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722284590] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:25:00,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:25:00,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 14:25:00,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581014240] [2024-02-07 14:25:00,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:25:00,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 14:25:00,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:25:00,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 14:25:00,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-02-07 14:25:00,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 14:25:00,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 90 transitions, 711 flow. Second operand has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:00,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:25:00,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 14:25:00,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:25:01,251 INFO L124 PetriNetUnfolderBase]: 1690/3224 cut-off events. [2024-02-07 14:25:01,252 INFO L125 PetriNetUnfolderBase]: For 8846/8846 co-relation queries the response was YES. [2024-02-07 14:25:01,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11347 conditions, 3224 events. 1690/3224 cut-off events. For 8846/8846 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 21011 event pairs, 432 based on Foata normal form. 8/3085 useless extension candidates. Maximal degree in co-relation 11319. Up to 2167 conditions per place. [2024-02-07 14:25:01,273 INFO L140 encePairwiseOnDemand]: 55/62 looper letters, 89 selfloop transitions, 30 changer transitions 0/133 dead transitions. [2024-02-07 14:25:01,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 133 transitions, 1240 flow [2024-02-07 14:25:01,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 14:25:01,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 14:25:01,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 150 transitions. [2024-02-07 14:25:01,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4838709677419355 [2024-02-07 14:25:01,275 INFO L175 Difference]: Start difference. First operand has 101 places, 90 transitions, 711 flow. Second operand 5 states and 150 transitions. [2024-02-07 14:25:01,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 133 transitions, 1240 flow [2024-02-07 14:25:01,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 133 transitions, 1214 flow, removed 13 selfloop flow, removed 0 redundant places. [2024-02-07 14:25:01,287 INFO L231 Difference]: Finished difference. Result has 108 places, 104 transitions, 959 flow [2024-02-07 14:25:01,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=691, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=959, PETRI_PLACES=108, PETRI_TRANSITIONS=104} [2024-02-07 14:25:01,288 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 40 predicate places. [2024-02-07 14:25:01,288 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 104 transitions, 959 flow [2024-02-07 14:25:01,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:01,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:25:01,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:25:01,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-02-07 14:25:01,289 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:25:01,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:25:01,289 INFO L85 PathProgramCache]: Analyzing trace with hash -2079143338, now seen corresponding path program 3 times [2024-02-07 14:25:01,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:25:01,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170502836] [2024-02-07 14:25:01,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:25:01,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:25:01,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:25:01,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:25:01,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:25:01,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170502836] [2024-02-07 14:25:01,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170502836] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:25:01,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:25:01,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 14:25:01,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584142287] [2024-02-07 14:25:01,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:25:01,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 14:25:01,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:25:01,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 14:25:01,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-02-07 14:25:01,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 14:25:01,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 104 transitions, 959 flow. Second operand has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:01,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:25:01,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 14:25:01,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:25:01,714 INFO L124 PetriNetUnfolderBase]: 1682/3222 cut-off events. [2024-02-07 14:25:01,714 INFO L125 PetriNetUnfolderBase]: For 10931/10931 co-relation queries the response was YES. [2024-02-07 14:25:01,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11958 conditions, 3222 events. 1682/3222 cut-off events. For 10931/10931 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 21081 event pairs, 416 based on Foata normal form. 4/3075 useless extension candidates. Maximal degree in co-relation 11926. Up to 2050 conditions per place. [2024-02-07 14:25:01,736 INFO L140 encePairwiseOnDemand]: 56/62 looper letters, 100 selfloop transitions, 21 changer transitions 0/135 dead transitions. [2024-02-07 14:25:01,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 135 transitions, 1336 flow [2024-02-07 14:25:01,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 14:25:01,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 14:25:01,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-02-07 14:25:01,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47419354838709676 [2024-02-07 14:25:01,738 INFO L175 Difference]: Start difference. First operand has 108 places, 104 transitions, 959 flow. Second operand 5 states and 147 transitions. [2024-02-07 14:25:01,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 135 transitions, 1336 flow [2024-02-07 14:25:01,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 135 transitions, 1306 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-02-07 14:25:01,757 INFO L231 Difference]: Finished difference. Result has 113 places, 108 transitions, 1018 flow [2024-02-07 14:25:01,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=929, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1018, PETRI_PLACES=113, PETRI_TRANSITIONS=108} [2024-02-07 14:25:01,757 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 45 predicate places. [2024-02-07 14:25:01,758 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 108 transitions, 1018 flow [2024-02-07 14:25:01,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:01,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:25:01,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:25:01,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-02-07 14:25:01,758 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:25:01,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:25:01,759 INFO L85 PathProgramCache]: Analyzing trace with hash 768938189, now seen corresponding path program 1 times [2024-02-07 14:25:01,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:25:01,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485188551] [2024-02-07 14:25:01,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:25:01,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:25:01,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:25:01,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:25:01,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:25:01,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485188551] [2024-02-07 14:25:01,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485188551] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:25:01,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:25:01,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-07 14:25:01,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199667574] [2024-02-07 14:25:01,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:25:01,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 14:25:01,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:25:01,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 14:25:01,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-02-07 14:25:01,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 62 [2024-02-07 14:25:01,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 108 transitions, 1018 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:01,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:25:01,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 62 [2024-02-07 14:25:01,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:25:02,073 INFO L124 PetriNetUnfolderBase]: 1254/2081 cut-off events. [2024-02-07 14:25:02,074 INFO L125 PetriNetUnfolderBase]: For 8870/8870 co-relation queries the response was YES. [2024-02-07 14:25:02,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8926 conditions, 2081 events. 1254/2081 cut-off events. For 8870/8870 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 10690 event pairs, 112 based on Foata normal form. 76/2129 useless extension candidates. Maximal degree in co-relation 8892. Up to 736 conditions per place. [2024-02-07 14:25:02,087 INFO L140 encePairwiseOnDemand]: 56/62 looper letters, 153 selfloop transitions, 11 changer transitions 1/179 dead transitions. [2024-02-07 14:25:02,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 179 transitions, 1985 flow [2024-02-07 14:25:02,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-07 14:25:02,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-07 14:25:02,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-02-07 14:25:02,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4435483870967742 [2024-02-07 14:25:02,088 INFO L175 Difference]: Start difference. First operand has 113 places, 108 transitions, 1018 flow. Second operand 6 states and 165 transitions. [2024-02-07 14:25:02,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 179 transitions, 1985 flow [2024-02-07 14:25:02,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 179 transitions, 1788 flow, removed 22 selfloop flow, removed 10 redundant places. [2024-02-07 14:25:02,100 INFO L231 Difference]: Finished difference. Result has 110 places, 102 transitions, 880 flow [2024-02-07 14:25:02,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=844, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=880, PETRI_PLACES=110, PETRI_TRANSITIONS=102} [2024-02-07 14:25:02,101 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 42 predicate places. [2024-02-07 14:25:02,101 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 102 transitions, 880 flow [2024-02-07 14:25:02,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:02,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:25:02,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:25:02,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-02-07 14:25:02,102 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:25:02,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:25:02,102 INFO L85 PathProgramCache]: Analyzing trace with hash -758641657, now seen corresponding path program 1 times [2024-02-07 14:25:02,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:25:02,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864196991] [2024-02-07 14:25:02,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:25:02,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:25:02,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:25:02,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:25:02,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:25:02,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864196991] [2024-02-07 14:25:02,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864196991] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:25:02,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:25:02,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-07 14:25:02,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819653811] [2024-02-07 14:25:02,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:25:02,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 14:25:02,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:25:02,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 14:25:02,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-02-07 14:25:02,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 14:25:02,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 102 transitions, 880 flow. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:02,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:25:02,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 14:25:02,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:25:02,593 INFO L124 PetriNetUnfolderBase]: 1493/2681 cut-off events. [2024-02-07 14:25:02,594 INFO L125 PetriNetUnfolderBase]: For 7979/7979 co-relation queries the response was YES. [2024-02-07 14:25:02,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10296 conditions, 2681 events. 1493/2681 cut-off events. For 7979/7979 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 15727 event pairs, 250 based on Foata normal form. 0/2630 useless extension candidates. Maximal degree in co-relation 10268. Up to 1567 conditions per place. [2024-02-07 14:25:02,612 INFO L140 encePairwiseOnDemand]: 53/62 looper letters, 152 selfloop transitions, 23 changer transitions 0/189 dead transitions. [2024-02-07 14:25:02,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 189 transitions, 1771 flow [2024-02-07 14:25:02,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 14:25:02,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 14:25:02,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 277 transitions. [2024-02-07 14:25:02,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4467741935483871 [2024-02-07 14:25:02,614 INFO L175 Difference]: Start difference. First operand has 110 places, 102 transitions, 880 flow. Second operand 10 states and 277 transitions. [2024-02-07 14:25:02,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 189 transitions, 1771 flow [2024-02-07 14:25:02,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 189 transitions, 1555 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-02-07 14:25:02,633 INFO L231 Difference]: Finished difference. Result has 116 places, 113 transitions, 1014 flow [2024-02-07 14:25:02,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1014, PETRI_PLACES=116, PETRI_TRANSITIONS=113} [2024-02-07 14:25:02,634 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 48 predicate places. [2024-02-07 14:25:02,634 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 113 transitions, 1014 flow [2024-02-07 14:25:02,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:02,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:25:02,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:25:02,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-02-07 14:25:02,635 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:25:02,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:25:02,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1120971341, now seen corresponding path program 2 times [2024-02-07 14:25:02,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:25:02,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578412028] [2024-02-07 14:25:02,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:25:02,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:25:02,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:25:02,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:25:02,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:25:02,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578412028] [2024-02-07 14:25:02,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578412028] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:25:02,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:25:02,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-07 14:25:02,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589577543] [2024-02-07 14:25:02,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:25:02,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 14:25:02,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:25:02,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 14:25:02,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-02-07 14:25:02,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 14:25:02,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 113 transitions, 1014 flow. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:02,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:25:02,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 14:25:02,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:25:03,160 INFO L124 PetriNetUnfolderBase]: 1875/3447 cut-off events. [2024-02-07 14:25:03,160 INFO L125 PetriNetUnfolderBase]: For 8589/8589 co-relation queries the response was YES. [2024-02-07 14:25:03,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11651 conditions, 3447 events. 1875/3447 cut-off events. For 8589/8589 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 21735 event pairs, 426 based on Foata normal form. 8/3388 useless extension candidates. Maximal degree in co-relation 11622. Up to 1333 conditions per place. [2024-02-07 14:25:03,184 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 161 selfloop transitions, 23 changer transitions 0/198 dead transitions. [2024-02-07 14:25:03,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 198 transitions, 1754 flow [2024-02-07 14:25:03,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-07 14:25:03,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-07 14:25:03,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 261 transitions. [2024-02-07 14:25:03,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46774193548387094 [2024-02-07 14:25:03,186 INFO L175 Difference]: Start difference. First operand has 116 places, 113 transitions, 1014 flow. Second operand 9 states and 261 transitions. [2024-02-07 14:25:03,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 198 transitions, 1754 flow [2024-02-07 14:25:03,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 198 transitions, 1676 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-02-07 14:25:03,209 INFO L231 Difference]: Finished difference. Result has 123 places, 116 transitions, 1050 flow [2024-02-07 14:25:03,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=936, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1050, PETRI_PLACES=123, PETRI_TRANSITIONS=116} [2024-02-07 14:25:03,210 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 55 predicate places. [2024-02-07 14:25:03,210 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 116 transitions, 1050 flow [2024-02-07 14:25:03,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:03,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:25:03,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:25:03,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-02-07 14:25:03,211 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:25:03,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:25:03,211 INFO L85 PathProgramCache]: Analyzing trace with hash 2125465487, now seen corresponding path program 3 times [2024-02-07 14:25:03,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:25:03,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062979015] [2024-02-07 14:25:03,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:25:03,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:25:03,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:25:03,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:25:03,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:25:03,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062979015] [2024-02-07 14:25:03,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062979015] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:25:03,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:25:03,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:25:03,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761340365] [2024-02-07 14:25:03,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:25:03,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 14:25:03,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:25:03,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 14:25:03,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-02-07 14:25:03,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 14:25:03,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 116 transitions, 1050 flow. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:03,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:25:03,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 14:25:03,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:25:03,870 INFO L124 PetriNetUnfolderBase]: 2162/4043 cut-off events. [2024-02-07 14:25:03,870 INFO L125 PetriNetUnfolderBase]: For 10173/10173 co-relation queries the response was YES. [2024-02-07 14:25:03,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13059 conditions, 4043 events. 2162/4043 cut-off events. For 10173/10173 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 26766 event pairs, 718 based on Foata normal form. 8/3967 useless extension candidates. Maximal degree in co-relation 13029. Up to 2036 conditions per place. [2024-02-07 14:25:03,889 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 157 selfloop transitions, 40 changer transitions 0/211 dead transitions. [2024-02-07 14:25:03,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 211 transitions, 1912 flow [2024-02-07 14:25:03,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 14:25:03,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 14:25:03,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 280 transitions. [2024-02-07 14:25:03,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2024-02-07 14:25:03,891 INFO L175 Difference]: Start difference. First operand has 123 places, 116 transitions, 1050 flow. Second operand 10 states and 280 transitions. [2024-02-07 14:25:03,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 211 transitions, 1912 flow [2024-02-07 14:25:03,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 211 transitions, 1855 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-02-07 14:25:03,910 INFO L231 Difference]: Finished difference. Result has 132 places, 121 transitions, 1166 flow [2024-02-07 14:25:03,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=1001, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1166, PETRI_PLACES=132, PETRI_TRANSITIONS=121} [2024-02-07 14:25:03,911 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 64 predicate places. [2024-02-07 14:25:03,911 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 121 transitions, 1166 flow [2024-02-07 14:25:03,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:03,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:25:03,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:25:03,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-02-07 14:25:03,912 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:25:03,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:25:03,912 INFO L85 PathProgramCache]: Analyzing trace with hash -460132305, now seen corresponding path program 4 times [2024-02-07 14:25:03,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:25:03,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058932530] [2024-02-07 14:25:03,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:25:03,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:25:03,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:25:04,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:25:04,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:25:04,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058932530] [2024-02-07 14:25:04,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058932530] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:25:04,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:25:04,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:25:04,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194456519] [2024-02-07 14:25:04,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:25:04,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 14:25:04,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:25:04,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 14:25:04,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-02-07 14:25:04,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 14:25:04,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 121 transitions, 1166 flow. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:04,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:25:04,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 14:25:04,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:25:04,491 INFO L124 PetriNetUnfolderBase]: 2166/4127 cut-off events. [2024-02-07 14:25:04,491 INFO L125 PetriNetUnfolderBase]: For 11542/11542 co-relation queries the response was YES. [2024-02-07 14:25:04,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13500 conditions, 4127 events. 2166/4127 cut-off events. For 11542/11542 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 27913 event pairs, 714 based on Foata normal form. 8/4035 useless extension candidates. Maximal degree in co-relation 13466. Up to 2036 conditions per place. [2024-02-07 14:25:04,521 INFO L140 encePairwiseOnDemand]: 55/62 looper letters, 149 selfloop transitions, 38 changer transitions 0/201 dead transitions. [2024-02-07 14:25:04,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 201 transitions, 1905 flow [2024-02-07 14:25:04,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 14:25:04,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 14:25:04,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 235 transitions. [2024-02-07 14:25:04,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4737903225806452 [2024-02-07 14:25:04,522 INFO L175 Difference]: Start difference. First operand has 132 places, 121 transitions, 1166 flow. Second operand 8 states and 235 transitions. [2024-02-07 14:25:04,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 201 transitions, 1905 flow [2024-02-07 14:25:04,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 201 transitions, 1785 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-02-07 14:25:04,549 INFO L231 Difference]: Finished difference. Result has 136 places, 121 transitions, 1125 flow [2024-02-07 14:25:04,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=1046, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1125, PETRI_PLACES=136, PETRI_TRANSITIONS=121} [2024-02-07 14:25:04,550 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 68 predicate places. [2024-02-07 14:25:04,550 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 121 transitions, 1125 flow [2024-02-07 14:25:04,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:04,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:25:04,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:25:04,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-02-07 14:25:04,551 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:25:04,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:25:04,551 INFO L85 PathProgramCache]: Analyzing trace with hash -964201885, now seen corresponding path program 5 times [2024-02-07 14:25:04,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:25:04,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27582274] [2024-02-07 14:25:04,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:25:04,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:25:04,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:25:04,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:25:04,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:25:04,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27582274] [2024-02-07 14:25:04,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27582274] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:25:04,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:25:04,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-07 14:25:04,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859255863] [2024-02-07 14:25:04,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:25:04,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 14:25:04,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:25:04,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 14:25:04,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-02-07 14:25:04,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 14:25:04,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 121 transitions, 1125 flow. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:04,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:25:04,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 14:25:04,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:25:05,114 INFO L124 PetriNetUnfolderBase]: 2170/4162 cut-off events. [2024-02-07 14:25:05,114 INFO L125 PetriNetUnfolderBase]: For 10406/10406 co-relation queries the response was YES. [2024-02-07 14:25:05,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13292 conditions, 4162 events. 2170/4162 cut-off events. For 10406/10406 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 28400 event pairs, 566 based on Foata normal form. 8/4055 useless extension candidates. Maximal degree in co-relation 13257. Up to 2670 conditions per place. [2024-02-07 14:25:05,142 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 159 selfloop transitions, 21 changer transitions 0/194 dead transitions. [2024-02-07 14:25:05,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 194 transitions, 1759 flow [2024-02-07 14:25:05,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-07 14:25:05,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-07 14:25:05,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 255 transitions. [2024-02-07 14:25:05,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45698924731182794 [2024-02-07 14:25:05,143 INFO L175 Difference]: Start difference. First operand has 136 places, 121 transitions, 1125 flow. Second operand 9 states and 255 transitions. [2024-02-07 14:25:05,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 194 transitions, 1759 flow [2024-02-07 14:25:05,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 194 transitions, 1682 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-02-07 14:25:05,168 INFO L231 Difference]: Finished difference. Result has 140 places, 122 transitions, 1117 flow [2024-02-07 14:25:05,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=1050, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1117, PETRI_PLACES=140, PETRI_TRANSITIONS=122} [2024-02-07 14:25:05,168 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 72 predicate places. [2024-02-07 14:25:05,169 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 122 transitions, 1117 flow [2024-02-07 14:25:05,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:05,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:25:05,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:25:05,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-02-07 14:25:05,169 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:25:05,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:25:05,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1317912857, now seen corresponding path program 6 times [2024-02-07 14:25:05,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:25:05,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128722698] [2024-02-07 14:25:05,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:25:05,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:25:05,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:25:05,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:25:05,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:25:05,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128722698] [2024-02-07 14:25:05,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128722698] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:25:05,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:25:05,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:25:05,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165069110] [2024-02-07 14:25:05,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:25:05,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 14:25:05,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:25:05,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 14:25:05,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-02-07 14:25:05,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 14:25:05,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 122 transitions, 1117 flow. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:05,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:25:05,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 14:25:05,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:25:05,787 INFO L124 PetriNetUnfolderBase]: 2677/5152 cut-off events. [2024-02-07 14:25:05,787 INFO L125 PetriNetUnfolderBase]: For 13459/13459 co-relation queries the response was YES. [2024-02-07 14:25:05,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16286 conditions, 5152 events. 2677/5152 cut-off events. For 13459/13459 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 36699 event pairs, 964 based on Foata normal form. 8/5012 useless extension candidates. Maximal degree in co-relation 16249. Up to 2988 conditions per place. [2024-02-07 14:25:05,824 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 164 selfloop transitions, 40 changer transitions 0/218 dead transitions. [2024-02-07 14:25:05,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 218 transitions, 2117 flow [2024-02-07 14:25:05,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 14:25:05,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 14:25:05,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 237 transitions. [2024-02-07 14:25:05,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4778225806451613 [2024-02-07 14:25:05,826 INFO L175 Difference]: Start difference. First operand has 140 places, 122 transitions, 1117 flow. Second operand 8 states and 237 transitions. [2024-02-07 14:25:05,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 218 transitions, 2117 flow [2024-02-07 14:25:05,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 218 transitions, 2081 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-02-07 14:25:05,860 INFO L231 Difference]: Finished difference. Result has 147 places, 135 transitions, 1418 flow [2024-02-07 14:25:05,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=1081, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1418, PETRI_PLACES=147, PETRI_TRANSITIONS=135} [2024-02-07 14:25:05,861 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 79 predicate places. [2024-02-07 14:25:05,861 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 135 transitions, 1418 flow [2024-02-07 14:25:05,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:05,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:25:05,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:25:05,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-02-07 14:25:05,862 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:25:05,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:25:05,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1988298347, now seen corresponding path program 7 times [2024-02-07 14:25:05,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:25:05,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294731125] [2024-02-07 14:25:05,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:25:05,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:25:05,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:25:05,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:25:05,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:25:05,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294731125] [2024-02-07 14:25:05,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294731125] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:25:05,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:25:05,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-07 14:25:05,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354661502] [2024-02-07 14:25:05,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:25:05,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:25:05,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:25:05,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:25:05,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:25:05,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 14:25:05,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 135 transitions, 1418 flow. Second operand has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:05,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:25:05,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 14:25:05,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:25:06,596 INFO L124 PetriNetUnfolderBase]: 3389/6564 cut-off events. [2024-02-07 14:25:06,596 INFO L125 PetriNetUnfolderBase]: For 21986/21986 co-relation queries the response was YES. [2024-02-07 14:25:06,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21326 conditions, 6564 events. 3389/6564 cut-off events. For 21986/21986 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 49311 event pairs, 808 based on Foata normal form. 8/6392 useless extension candidates. Maximal degree in co-relation 21284. Up to 3019 conditions per place. [2024-02-07 14:25:06,647 INFO L140 encePairwiseOnDemand]: 55/62 looper letters, 172 selfloop transitions, 40 changer transitions 0/226 dead transitions. [2024-02-07 14:25:06,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 226 transitions, 2350 flow [2024-02-07 14:25:06,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:25:06,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:25:06,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 214 transitions. [2024-02-07 14:25:06,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4930875576036866 [2024-02-07 14:25:06,648 INFO L175 Difference]: Start difference. First operand has 147 places, 135 transitions, 1418 flow. Second operand 7 states and 214 transitions. [2024-02-07 14:25:06,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 226 transitions, 2350 flow [2024-02-07 14:25:06,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 226 transitions, 2288 flow, removed 26 selfloop flow, removed 1 redundant places. [2024-02-07 14:25:06,725 INFO L231 Difference]: Finished difference. Result has 157 places, 144 transitions, 1634 flow [2024-02-07 14:25:06,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=1356, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1634, PETRI_PLACES=157, PETRI_TRANSITIONS=144} [2024-02-07 14:25:06,726 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 89 predicate places. [2024-02-07 14:25:06,726 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 144 transitions, 1634 flow [2024-02-07 14:25:06,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:06,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:25:06,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:25:06,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-02-07 14:25:06,727 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:25:06,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:25:06,727 INFO L85 PathProgramCache]: Analyzing trace with hash 117101371, now seen corresponding path program 8 times [2024-02-07 14:25:06,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:25:06,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571513286] [2024-02-07 14:25:06,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:25:06,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:25:06,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:25:06,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:25:06,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:25:06,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571513286] [2024-02-07 14:25:06,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571513286] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:25:06,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:25:06,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:25:06,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633481636] [2024-02-07 14:25:06,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:25:06,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 14:25:06,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:25:06,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 14:25:06,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-02-07 14:25:06,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 14:25:06,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 144 transitions, 1634 flow. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:06,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:25:06,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 14:25:06,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:25:07,667 INFO L124 PetriNetUnfolderBase]: 3722/7155 cut-off events. [2024-02-07 14:25:07,667 INFO L125 PetriNetUnfolderBase]: For 28491/28491 co-relation queries the response was YES. [2024-02-07 14:25:07,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23933 conditions, 7155 events. 3722/7155 cut-off events. For 28491/28491 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 54375 event pairs, 1494 based on Foata normal form. 8/6967 useless extension candidates. Maximal degree in co-relation 23886. Up to 4813 conditions per place. [2024-02-07 14:25:07,711 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 180 selfloop transitions, 43 changer transitions 0/237 dead transitions. [2024-02-07 14:25:07,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 237 transitions, 2588 flow [2024-02-07 14:25:07,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 14:25:07,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 14:25:07,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 278 transitions. [2024-02-07 14:25:07,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4483870967741935 [2024-02-07 14:25:07,712 INFO L175 Difference]: Start difference. First operand has 157 places, 144 transitions, 1634 flow. Second operand 10 states and 278 transitions. [2024-02-07 14:25:07,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 237 transitions, 2588 flow [2024-02-07 14:25:07,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 237 transitions, 2526 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-02-07 14:25:07,814 INFO L231 Difference]: Finished difference. Result has 169 places, 150 transitions, 1780 flow [2024-02-07 14:25:07,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=1572, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1780, PETRI_PLACES=169, PETRI_TRANSITIONS=150} [2024-02-07 14:25:07,815 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 101 predicate places. [2024-02-07 14:25:07,815 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 150 transitions, 1780 flow [2024-02-07 14:25:07,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:07,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:25:07,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:25:07,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-02-07 14:25:07,816 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:25:07,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:25:07,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1793837097, now seen corresponding path program 9 times [2024-02-07 14:25:07,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:25:07,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022940152] [2024-02-07 14:25:07,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:25:07,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:25:07,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:25:07,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:25:07,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:25:07,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022940152] [2024-02-07 14:25:07,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022940152] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:25:07,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:25:07,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-07 14:25:07,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411987574] [2024-02-07 14:25:07,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:25:07,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:25:07,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:25:07,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:25:07,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:25:07,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 14:25:07,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 150 transitions, 1780 flow. Second operand has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:07,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:25:07,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 14:25:07,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:25:08,746 INFO L124 PetriNetUnfolderBase]: 4245/8284 cut-off events. [2024-02-07 14:25:08,746 INFO L125 PetriNetUnfolderBase]: For 36565/36565 co-relation queries the response was YES. [2024-02-07 14:25:08,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27421 conditions, 8284 events. 4245/8284 cut-off events. For 36565/36565 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 65651 event pairs, 762 based on Foata normal form. 8/8048 useless extension candidates. Maximal degree in co-relation 27370. Up to 2995 conditions per place. [2024-02-07 14:25:08,835 INFO L140 encePairwiseOnDemand]: 55/62 looper letters, 171 selfloop transitions, 49 changer transitions 0/234 dead transitions. [2024-02-07 14:25:08,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 234 transitions, 2684 flow [2024-02-07 14:25:08,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:25:08,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:25:08,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 212 transitions. [2024-02-07 14:25:08,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48847926267281105 [2024-02-07 14:25:08,836 INFO L175 Difference]: Start difference. First operand has 169 places, 150 transitions, 1780 flow. Second operand 7 states and 212 transitions. [2024-02-07 14:25:08,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 234 transitions, 2684 flow [2024-02-07 14:25:08,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 234 transitions, 2575 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-02-07 14:25:08,986 INFO L231 Difference]: Finished difference. Result has 176 places, 155 transitions, 1912 flow [2024-02-07 14:25:08,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=1671, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1912, PETRI_PLACES=176, PETRI_TRANSITIONS=155} [2024-02-07 14:25:08,987 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 108 predicate places. [2024-02-07 14:25:08,987 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 155 transitions, 1912 flow [2024-02-07 14:25:08,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:08,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:25:08,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:25:08,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-02-07 14:25:08,988 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:25:08,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:25:08,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1327287519, now seen corresponding path program 10 times [2024-02-07 14:25:08,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:25:08,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937922663] [2024-02-07 14:25:08,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:25:08,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:25:08,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:25:09,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:25:09,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:25:09,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937922663] [2024-02-07 14:25:09,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937922663] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:25:09,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:25:09,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:25:09,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847496872] [2024-02-07 14:25:09,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:25:09,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 14:25:09,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:25:09,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 14:25:09,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-02-07 14:25:09,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 14:25:09,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 155 transitions, 1912 flow. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:09,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:25:09,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 14:25:09,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:25:09,938 INFO L124 PetriNetUnfolderBase]: 4249/8298 cut-off events. [2024-02-07 14:25:09,938 INFO L125 PetriNetUnfolderBase]: For 41039/41039 co-relation queries the response was YES. [2024-02-07 14:25:09,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27911 conditions, 8298 events. 4249/8298 cut-off events. For 41039/41039 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 65597 event pairs, 1834 based on Foata normal form. 8/8046 useless extension candidates. Maximal degree in co-relation 27856. Up to 5670 conditions per place. [2024-02-07 14:25:10,019 INFO L140 encePairwiseOnDemand]: 55/62 looper letters, 177 selfloop transitions, 41 changer transitions 0/232 dead transitions. [2024-02-07 14:25:10,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 232 transitions, 2738 flow [2024-02-07 14:25:10,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 14:25:10,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 14:25:10,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 233 transitions. [2024-02-07 14:25:10,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46975806451612906 [2024-02-07 14:25:10,020 INFO L175 Difference]: Start difference. First operand has 176 places, 155 transitions, 1912 flow. Second operand 8 states and 233 transitions. [2024-02-07 14:25:10,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 232 transitions, 2738 flow [2024-02-07 14:25:10,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 232 transitions, 2645 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-02-07 14:25:10,255 INFO L231 Difference]: Finished difference. Result has 182 places, 155 transitions, 1916 flow [2024-02-07 14:25:10,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=1831, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1916, PETRI_PLACES=182, PETRI_TRANSITIONS=155} [2024-02-07 14:25:10,256 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 114 predicate places. [2024-02-07 14:25:10,256 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 155 transitions, 1916 flow [2024-02-07 14:25:10,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:10,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:25:10,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:25:10,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-02-07 14:25:10,257 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:25:10,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:25:10,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1164934559, now seen corresponding path program 11 times [2024-02-07 14:25:10,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:25:10,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950525918] [2024-02-07 14:25:10,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:25:10,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:25:10,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:25:10,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:25:10,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:25:10,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950525918] [2024-02-07 14:25:10,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950525918] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:25:10,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:25:10,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-07 14:25:10,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455971880] [2024-02-07 14:25:10,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:25:10,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:25:10,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:25:10,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:25:10,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:25:10,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 14:25:10,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 155 transitions, 1916 flow. Second operand has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:10,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:25:10,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 14:25:10,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:25:11,284 INFO L124 PetriNetUnfolderBase]: 4237/8320 cut-off events. [2024-02-07 14:25:11,285 INFO L125 PetriNetUnfolderBase]: For 33823/33823 co-relation queries the response was YES. [2024-02-07 14:25:11,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27378 conditions, 8320 events. 4237/8320 cut-off events. For 33823/33823 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 66254 event pairs, 882 based on Foata normal form. 8/8068 useless extension candidates. Maximal degree in co-relation 27322. Up to 3383 conditions per place. [2024-02-07 14:25:11,338 INFO L140 encePairwiseOnDemand]: 55/62 looper letters, 188 selfloop transitions, 41 changer transitions 0/243 dead transitions. [2024-02-07 14:25:11,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 243 transitions, 2810 flow [2024-02-07 14:25:11,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:25:11,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:25:11,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 217 transitions. [2024-02-07 14:25:11,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-02-07 14:25:11,339 INFO L175 Difference]: Start difference. First operand has 182 places, 155 transitions, 1916 flow. Second operand 7 states and 217 transitions. [2024-02-07 14:25:11,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 243 transitions, 2810 flow [2024-02-07 14:25:11,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 243 transitions, 2729 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-02-07 14:25:11,472 INFO L231 Difference]: Finished difference. Result has 185 places, 157 transitions, 1962 flow [2024-02-07 14:25:11,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=1835, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1962, PETRI_PLACES=185, PETRI_TRANSITIONS=157} [2024-02-07 14:25:11,475 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 117 predicate places. [2024-02-07 14:25:11,476 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 157 transitions, 1962 flow [2024-02-07 14:25:11,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:11,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:25:11,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:25:11,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-02-07 14:25:11,476 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:25:11,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:25:11,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1162341053, now seen corresponding path program 12 times [2024-02-07 14:25:11,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:25:11,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918202715] [2024-02-07 14:25:11,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:25:11,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:25:11,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:25:11,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:25:11,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:25:11,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918202715] [2024-02-07 14:25:11,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918202715] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:25:11,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:25:11,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:25:11,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816818249] [2024-02-07 14:25:11,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:25:11,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 14:25:11,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:25:11,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 14:25:11,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-02-07 14:25:11,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 14:25:11,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 157 transitions, 1962 flow. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:11,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:25:11,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 14:25:11,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:25:12,592 INFO L124 PetriNetUnfolderBase]: 4757/9294 cut-off events. [2024-02-07 14:25:12,592 INFO L125 PetriNetUnfolderBase]: For 41785/41785 co-relation queries the response was YES. [2024-02-07 14:25:12,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30823 conditions, 9294 events. 4757/9294 cut-off events. For 41785/41785 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 75207 event pairs, 2006 based on Foata normal form. 8/9010 useless extension candidates. Maximal degree in co-relation 30764. Up to 6161 conditions per place. [2024-02-07 14:25:12,686 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 206 selfloop transitions, 44 changer transitions 0/264 dead transitions. [2024-02-07 14:25:12,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 264 transitions, 3123 flow [2024-02-07 14:25:12,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 14:25:12,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 14:25:12,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 285 transitions. [2024-02-07 14:25:12,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4596774193548387 [2024-02-07 14:25:12,690 INFO L175 Difference]: Start difference. First operand has 185 places, 157 transitions, 1962 flow. Second operand 10 states and 285 transitions. [2024-02-07 14:25:12,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 264 transitions, 3123 flow [2024-02-07 14:25:12,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 264 transitions, 3034 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-02-07 14:25:12,884 INFO L231 Difference]: Finished difference. Result has 197 places, 165 transitions, 2184 flow [2024-02-07 14:25:12,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=1879, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2184, PETRI_PLACES=197, PETRI_TRANSITIONS=165} [2024-02-07 14:25:12,884 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 129 predicate places. [2024-02-07 14:25:12,884 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 165 transitions, 2184 flow [2024-02-07 14:25:12,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:12,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:25:12,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:25:12,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-02-07 14:25:12,885 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:25:12,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:25:12,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1724536447, now seen corresponding path program 13 times [2024-02-07 14:25:12,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:25:12,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415545638] [2024-02-07 14:25:12,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:25:12,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:25:12,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:25:13,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:25:13,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:25:13,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415545638] [2024-02-07 14:25:13,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415545638] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:25:13,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:25:13,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:25:13,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088164104] [2024-02-07 14:25:13,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:25:13,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 14:25:13,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:25:13,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 14:25:13,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-02-07 14:25:13,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 14:25:13,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 165 transitions, 2184 flow. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:13,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:25:13,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 14:25:13,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:25:14,094 INFO L124 PetriNetUnfolderBase]: 5139/10080 cut-off events. [2024-02-07 14:25:14,095 INFO L125 PetriNetUnfolderBase]: For 51297/51297 co-relation queries the response was YES. [2024-02-07 14:25:14,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33813 conditions, 10080 events. 5139/10080 cut-off events. For 51297/51297 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 83355 event pairs, 1742 based on Foata normal form. 8/9764 useless extension candidates. Maximal degree in co-relation 33748. Up to 5143 conditions per place. [2024-02-07 14:25:14,198 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 200 selfloop transitions, 55 changer transitions 0/269 dead transitions. [2024-02-07 14:25:14,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 269 transitions, 3368 flow [2024-02-07 14:25:14,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 14:25:14,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 14:25:14,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 285 transitions. [2024-02-07 14:25:14,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4596774193548387 [2024-02-07 14:25:14,199 INFO L175 Difference]: Start difference. First operand has 197 places, 165 transitions, 2184 flow. Second operand 10 states and 285 transitions. [2024-02-07 14:25:14,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 269 transitions, 3368 flow [2024-02-07 14:25:14,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 269 transitions, 3224 flow, removed 49 selfloop flow, removed 2 redundant places. [2024-02-07 14:25:14,439 INFO L231 Difference]: Finished difference. Result has 209 places, 171 transitions, 2348 flow [2024-02-07 14:25:14,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=2063, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2348, PETRI_PLACES=209, PETRI_TRANSITIONS=171} [2024-02-07 14:25:14,440 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 141 predicate places. [2024-02-07 14:25:14,440 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 171 transitions, 2348 flow [2024-02-07 14:25:14,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:14,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:25:14,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:25:14,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-02-07 14:25:14,440 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:25:14,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:25:14,441 INFO L85 PathProgramCache]: Analyzing trace with hash -5888093, now seen corresponding path program 14 times [2024-02-07 14:25:14,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:25:14,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084052962] [2024-02-07 14:25:14,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:25:14,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:25:14,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:25:14,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:25:14,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:25:14,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084052962] [2024-02-07 14:25:14,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084052962] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:25:14,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:25:14,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:25:14,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320689731] [2024-02-07 14:25:14,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:25:14,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 14:25:14,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:25:14,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 14:25:14,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-02-07 14:25:14,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 14:25:14,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 171 transitions, 2348 flow. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:14,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:25:14,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 14:25:14,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:25:15,656 INFO L124 PetriNetUnfolderBase]: 5127/10040 cut-off events. [2024-02-07 14:25:15,656 INFO L125 PetriNetUnfolderBase]: For 55131/55131 co-relation queries the response was YES. [2024-02-07 14:25:15,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33986 conditions, 10040 events. 5127/10040 cut-off events. For 55131/55131 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 82511 event pairs, 2360 based on Foata normal form. 8/9724 useless extension candidates. Maximal degree in co-relation 33916. Up to 7276 conditions per place. [2024-02-07 14:25:15,757 INFO L140 encePairwiseOnDemand]: 55/62 looper letters, 171 selfloop transitions, 47 changer transitions 0/232 dead transitions. [2024-02-07 14:25:15,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 232 transitions, 3098 flow [2024-02-07 14:25:15,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 14:25:15,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 14:25:15,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-02-07 14:25:15,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4495967741935484 [2024-02-07 14:25:15,759 INFO L175 Difference]: Start difference. First operand has 209 places, 171 transitions, 2348 flow. Second operand 8 states and 223 transitions. [2024-02-07 14:25:15,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 232 transitions, 3098 flow [2024-02-07 14:25:16,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 232 transitions, 2969 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-02-07 14:25:16,020 INFO L231 Difference]: Finished difference. Result has 215 places, 172 transitions, 2339 flow [2024-02-07 14:25:16,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=2219, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2339, PETRI_PLACES=215, PETRI_TRANSITIONS=172} [2024-02-07 14:25:16,021 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 147 predicate places. [2024-02-07 14:25:16,021 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 172 transitions, 2339 flow [2024-02-07 14:25:16,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:16,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:25:16,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:25:16,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-02-07 14:25:16,022 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:25:16,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:25:16,022 INFO L85 PathProgramCache]: Analyzing trace with hash -835281855, now seen corresponding path program 15 times [2024-02-07 14:25:16,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:25:16,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269436676] [2024-02-07 14:25:16,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:25:16,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:25:16,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:25:16,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:25:16,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:25:16,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269436676] [2024-02-07 14:25:16,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269436676] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:25:16,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:25:16,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:25:16,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20178359] [2024-02-07 14:25:16,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:25:16,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 14:25:16,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:25:16,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 14:25:16,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-02-07 14:25:16,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 14:25:16,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 172 transitions, 2339 flow. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:16,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:25:16,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 14:25:16,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:25:17,349 INFO L124 PetriNetUnfolderBase]: 5272/10437 cut-off events. [2024-02-07 14:25:17,350 INFO L125 PetriNetUnfolderBase]: For 53015/53015 co-relation queries the response was YES. [2024-02-07 14:25:17,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34582 conditions, 10437 events. 5272/10437 cut-off events. For 53015/53015 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 87471 event pairs, 1886 based on Foata normal form. 8/10089 useless extension candidates. Maximal degree in co-relation 34510. Up to 5143 conditions per place. [2024-02-07 14:25:17,502 INFO L140 encePairwiseOnDemand]: 55/62 looper letters, 199 selfloop transitions, 47 changer transitions 0/260 dead transitions. [2024-02-07 14:25:17,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 260 transitions, 3318 flow [2024-02-07 14:25:17,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 14:25:17,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 14:25:17,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 238 transitions. [2024-02-07 14:25:17,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4798387096774194 [2024-02-07 14:25:17,503 INFO L175 Difference]: Start difference. First operand has 215 places, 172 transitions, 2339 flow. Second operand 8 states and 238 transitions. [2024-02-07 14:25:17,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 260 transitions, 3318 flow [2024-02-07 14:25:17,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 260 transitions, 3203 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-02-07 14:25:17,775 INFO L231 Difference]: Finished difference. Result has 219 places, 173 transitions, 2364 flow [2024-02-07 14:25:17,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=2240, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2364, PETRI_PLACES=219, PETRI_TRANSITIONS=173} [2024-02-07 14:25:17,775 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 151 predicate places. [2024-02-07 14:25:17,776 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 173 transitions, 2364 flow [2024-02-07 14:25:17,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:17,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:25:17,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:25:17,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-02-07 14:25:17,776 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:25:17,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:25:17,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1857465915, now seen corresponding path program 16 times [2024-02-07 14:25:17,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:25:17,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447798791] [2024-02-07 14:25:17,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:25:17,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:25:17,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:25:17,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:25:17,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:25:17,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447798791] [2024-02-07 14:25:17,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447798791] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:25:17,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:25:17,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:25:17,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33869275] [2024-02-07 14:25:17,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:25:17,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 14:25:17,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:25:17,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 14:25:17,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-02-07 14:25:17,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 14:25:17,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 173 transitions, 2364 flow. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:17,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:25:17,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 14:25:17,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:25:19,115 INFO L124 PetriNetUnfolderBase]: 5260/10413 cut-off events. [2024-02-07 14:25:19,116 INFO L125 PetriNetUnfolderBase]: For 49651/49651 co-relation queries the response was YES. [2024-02-07 14:25:19,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34202 conditions, 10413 events. 5260/10413 cut-off events. For 49651/49651 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 87294 event pairs, 1926 based on Foata normal form. 8/10065 useless extension candidates. Maximal degree in co-relation 34128. Up to 5143 conditions per place. [2024-02-07 14:25:19,204 INFO L140 encePairwiseOnDemand]: 55/62 looper letters, 201 selfloop transitions, 46 changer transitions 0/261 dead transitions. [2024-02-07 14:25:19,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 261 transitions, 3328 flow [2024-02-07 14:25:19,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 14:25:19,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 14:25:19,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 238 transitions. [2024-02-07 14:25:19,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4798387096774194 [2024-02-07 14:25:19,205 INFO L175 Difference]: Start difference. First operand has 219 places, 173 transitions, 2364 flow. Second operand 8 states and 238 transitions. [2024-02-07 14:25:19,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 261 transitions, 3328 flow [2024-02-07 14:25:19,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 261 transitions, 3227 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-02-07 14:25:19,428 INFO L231 Difference]: Finished difference. Result has 224 places, 175 transitions, 2415 flow [2024-02-07 14:25:19,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=2264, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2415, PETRI_PLACES=224, PETRI_TRANSITIONS=175} [2024-02-07 14:25:19,429 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 156 predicate places. [2024-02-07 14:25:19,429 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 175 transitions, 2415 flow [2024-02-07 14:25:19,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:19,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:25:19,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:25:19,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-02-07 14:25:19,430 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:25:19,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:25:19,430 INFO L85 PathProgramCache]: Analyzing trace with hash -280985069, now seen corresponding path program 17 times [2024-02-07 14:25:19,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:25:19,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868631432] [2024-02-07 14:25:19,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:25:19,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:25:19,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:25:19,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:25:19,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:25:19,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868631432] [2024-02-07 14:25:19,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868631432] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:25:19,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:25:19,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:25:19,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902667379] [2024-02-07 14:25:19,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:25:19,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 14:25:19,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:25:19,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 14:25:19,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-02-07 14:25:19,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 14:25:19,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 175 transitions, 2415 flow. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:19,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:25:19,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 14:25:19,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:25:20,745 INFO L124 PetriNetUnfolderBase]: 5248/10379 cut-off events. [2024-02-07 14:25:20,746 INFO L125 PetriNetUnfolderBase]: For 50315/50315 co-relation queries the response was YES. [2024-02-07 14:25:20,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34121 conditions, 10379 events. 5248/10379 cut-off events. For 50315/50315 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 86723 event pairs, 2298 based on Foata normal form. 8/10031 useless extension candidates. Maximal degree in co-relation 34044. Up to 6978 conditions per place. [2024-02-07 14:25:20,922 INFO L140 encePairwiseOnDemand]: 55/62 looper letters, 189 selfloop transitions, 45 changer transitions 0/248 dead transitions. [2024-02-07 14:25:20,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 248 transitions, 3214 flow [2024-02-07 14:25:20,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 14:25:20,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 14:25:20,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 231 transitions. [2024-02-07 14:25:20,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4657258064516129 [2024-02-07 14:25:20,924 INFO L175 Difference]: Start difference. First operand has 224 places, 175 transitions, 2415 flow. Second operand 8 states and 231 transitions. [2024-02-07 14:25:20,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 248 transitions, 3214 flow [2024-02-07 14:25:21,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 248 transitions, 3121 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-02-07 14:25:21,203 INFO L231 Difference]: Finished difference. Result has 228 places, 175 transitions, 2415 flow [2024-02-07 14:25:21,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=2322, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2415, PETRI_PLACES=228, PETRI_TRANSITIONS=175} [2024-02-07 14:25:21,204 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 160 predicate places. [2024-02-07 14:25:21,204 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 175 transitions, 2415 flow [2024-02-07 14:25:21,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:21,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:25:21,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:25:21,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-02-07 14:25:21,205 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:25:21,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:25:21,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1470809461, now seen corresponding path program 18 times [2024-02-07 14:25:21,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:25:21,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273518696] [2024-02-07 14:25:21,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:25:21,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:25:21,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:25:21,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:25:21,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:25:21,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273518696] [2024-02-07 14:25:21,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273518696] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:25:21,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:25:21,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:25:21,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401851376] [2024-02-07 14:25:21,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:25:21,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-07 14:25:21,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:25:21,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-07 14:25:21,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-02-07 14:25:21,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 14:25:21,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 175 transitions, 2415 flow. Second operand has 9 states, 9 states have (on average 20.11111111111111) internal successors, (181), 9 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:21,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:25:21,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 14:25:21,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:25:22,901 INFO L124 PetriNetUnfolderBase]: 6241/12337 cut-off events. [2024-02-07 14:25:22,901 INFO L125 PetriNetUnfolderBase]: For 66919/66919 co-relation queries the response was YES. [2024-02-07 14:25:22,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41759 conditions, 12337 events. 6241/12337 cut-off events. For 66919/66919 co-relation queries the response was YES. Maximal size of possible extension queue 692. Compared 106493 event pairs, 2526 based on Foata normal form. 8/11926 useless extension candidates. Maximal degree in co-relation 41681. Up to 7642 conditions per place. [2024-02-07 14:25:23,037 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 229 selfloop transitions, 36 changer transitions 0/279 dead transitions. [2024-02-07 14:25:23,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 279 transitions, 3780 flow [2024-02-07 14:25:23,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 14:25:23,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 14:25:23,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 280 transitions. [2024-02-07 14:25:23,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2024-02-07 14:25:23,039 INFO L175 Difference]: Start difference. First operand has 228 places, 175 transitions, 2415 flow. Second operand 10 states and 280 transitions. [2024-02-07 14:25:23,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 279 transitions, 3780 flow [2024-02-07 14:25:23,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 279 transitions, 3665 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-02-07 14:25:23,443 INFO L231 Difference]: Finished difference. Result has 234 places, 191 transitions, 2791 flow [2024-02-07 14:25:23,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=2326, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2791, PETRI_PLACES=234, PETRI_TRANSITIONS=191} [2024-02-07 14:25:23,444 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 166 predicate places. [2024-02-07 14:25:23,444 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 191 transitions, 2791 flow [2024-02-07 14:25:23,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.11111111111111) internal successors, (181), 9 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:23,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:25:23,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:25:23,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-02-07 14:25:23,445 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:25:23,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:25:23,445 INFO L85 PathProgramCache]: Analyzing trace with hash -279840197, now seen corresponding path program 19 times [2024-02-07 14:25:23,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:25:23,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025894487] [2024-02-07 14:25:23,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:25:23,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:25:23,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:25:23,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:25:23,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:25:23,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025894487] [2024-02-07 14:25:23,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025894487] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:25:23,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:25:23,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-07 14:25:23,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542283053] [2024-02-07 14:25:23,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:25:23,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 14:25:23,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:25:23,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 14:25:23,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-02-07 14:25:23,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 14:25:23,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 191 transitions, 2791 flow. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:23,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:25:23,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 14:25:23,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:25:25,298 INFO L124 PetriNetUnfolderBase]: 6561/12971 cut-off events. [2024-02-07 14:25:25,299 INFO L125 PetriNetUnfolderBase]: For 72176/72176 co-relation queries the response was YES. [2024-02-07 14:25:25,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43909 conditions, 12971 events. 6561/12971 cut-off events. For 72176/72176 co-relation queries the response was YES. Maximal size of possible extension queue 735. Compared 112895 event pairs, 2832 based on Foata normal form. 8/12544 useless extension candidates. Maximal degree in co-relation 43828. Up to 9350 conditions per place. [2024-02-07 14:25:25,605 INFO L140 encePairwiseOnDemand]: 53/62 looper letters, 246 selfloop transitions, 28 changer transitions 0/288 dead transitions. [2024-02-07 14:25:25,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 288 transitions, 3859 flow [2024-02-07 14:25:25,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 14:25:25,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 14:25:25,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 284 transitions. [2024-02-07 14:25:25,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45806451612903226 [2024-02-07 14:25:25,607 INFO L175 Difference]: Start difference. First operand has 234 places, 191 transitions, 2791 flow. Second operand 10 states and 284 transitions. [2024-02-07 14:25:25,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 288 transitions, 3859 flow [2024-02-07 14:25:26,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 288 transitions, 3725 flow, removed 64 selfloop flow, removed 1 redundant places. [2024-02-07 14:25:26,086 INFO L231 Difference]: Finished difference. Result has 247 places, 198 transitions, 2862 flow [2024-02-07 14:25:26,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=2669, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2862, PETRI_PLACES=247, PETRI_TRANSITIONS=198} [2024-02-07 14:25:26,087 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 179 predicate places. [2024-02-07 14:25:26,087 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 198 transitions, 2862 flow [2024-02-07 14:25:26,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:26,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:25:26,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:25:26,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-02-07 14:25:26,088 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:25:26,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:25:26,088 INFO L85 PathProgramCache]: Analyzing trace with hash 711968693, now seen corresponding path program 20 times [2024-02-07 14:25:26,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:25:26,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984777299] [2024-02-07 14:25:26,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:25:26,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:25:26,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:25:26,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:25:26,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:25:26,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984777299] [2024-02-07 14:25:26,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984777299] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:25:26,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:25:26,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:25:26,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930649018] [2024-02-07 14:25:26,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:25:26,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-07 14:25:26,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:25:26,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-07 14:25:26,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-02-07 14:25:26,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 14:25:26,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 198 transitions, 2862 flow. Second operand has 9 states, 9 states have (on average 20.11111111111111) internal successors, (181), 9 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:26,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:25:26,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 14:25:26,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:25:27,980 INFO L124 PetriNetUnfolderBase]: 6690/13256 cut-off events. [2024-02-07 14:25:27,980 INFO L125 PetriNetUnfolderBase]: For 72608/72608 co-relation queries the response was YES. [2024-02-07 14:25:28,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44473 conditions, 13256 events. 6690/13256 cut-off events. For 72608/72608 co-relation queries the response was YES. Maximal size of possible extension queue 751. Compared 116094 event pairs, 2648 based on Foata normal form. 8/12813 useless extension candidates. Maximal degree in co-relation 44386. Up to 7642 conditions per place. [2024-02-07 14:25:28,174 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 244 selfloop transitions, 38 changer transitions 0/296 dead transitions. [2024-02-07 14:25:28,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 296 transitions, 3986 flow [2024-02-07 14:25:28,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 14:25:28,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 14:25:28,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 287 transitions. [2024-02-07 14:25:28,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4629032258064516 [2024-02-07 14:25:28,176 INFO L175 Difference]: Start difference. First operand has 247 places, 198 transitions, 2862 flow. Second operand 10 states and 287 transitions. [2024-02-07 14:25:28,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 296 transitions, 3986 flow [2024-02-07 14:25:28,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 296 transitions, 3911 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-02-07 14:25:28,651 INFO L231 Difference]: Finished difference. Result has 255 places, 200 transitions, 2942 flow [2024-02-07 14:25:28,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=2787, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2942, PETRI_PLACES=255, PETRI_TRANSITIONS=200} [2024-02-07 14:25:28,652 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 187 predicate places. [2024-02-07 14:25:28,652 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 200 transitions, 2942 flow [2024-02-07 14:25:28,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.11111111111111) internal successors, (181), 9 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:28,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:25:28,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:25:28,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-02-07 14:25:28,652 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:25:28,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:25:28,653 INFO L85 PathProgramCache]: Analyzing trace with hash 147006233, now seen corresponding path program 21 times [2024-02-07 14:25:28,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:25:28,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373961967] [2024-02-07 14:25:28,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:25:28,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:25:28,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:25:28,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:25:28,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:25:28,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373961967] [2024-02-07 14:25:28,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373961967] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:25:28,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:25:28,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:25:28,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867412061] [2024-02-07 14:25:28,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:25:28,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-07 14:25:28,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:25:28,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-07 14:25:28,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-02-07 14:25:28,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 14:25:28,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 200 transitions, 2942 flow. Second operand has 9 states, 9 states have (on average 20.11111111111111) internal successors, (181), 9 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:28,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:25:28,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 14:25:28,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:25:30,536 INFO L124 PetriNetUnfolderBase]: 6819/13531 cut-off events. [2024-02-07 14:25:30,536 INFO L125 PetriNetUnfolderBase]: For 77564/77564 co-relation queries the response was YES. [2024-02-07 14:25:30,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45476 conditions, 13531 events. 6819/13531 cut-off events. For 77564/77564 co-relation queries the response was YES. Maximal size of possible extension queue 768. Compared 119226 event pairs, 2676 based on Foata normal form. 8/13072 useless extension candidates. Maximal degree in co-relation 45386. Up to 7642 conditions per place. [2024-02-07 14:25:30,816 INFO L140 encePairwiseOnDemand]: 53/62 looper letters, 265 selfloop transitions, 40 changer transitions 0/319 dead transitions. [2024-02-07 14:25:30,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 319 transitions, 4160 flow [2024-02-07 14:25:30,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-07 14:25:30,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-07 14:25:30,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 339 transitions. [2024-02-07 14:25:30,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45564516129032256 [2024-02-07 14:25:30,819 INFO L175 Difference]: Start difference. First operand has 255 places, 200 transitions, 2942 flow. Second operand 12 states and 339 transitions. [2024-02-07 14:25:30,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 319 transitions, 4160 flow [2024-02-07 14:25:31,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 319 transitions, 4087 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-02-07 14:25:31,386 INFO L231 Difference]: Finished difference. Result has 264 places, 201 transitions, 2971 flow [2024-02-07 14:25:31,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=2869, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2971, PETRI_PLACES=264, PETRI_TRANSITIONS=201} [2024-02-07 14:25:31,387 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 196 predicate places. [2024-02-07 14:25:31,387 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 201 transitions, 2971 flow [2024-02-07 14:25:31,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.11111111111111) internal successors, (181), 9 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:31,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:25:31,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:25:31,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-02-07 14:25:31,388 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:25:31,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:25:31,388 INFO L85 PathProgramCache]: Analyzing trace with hash -795631065, now seen corresponding path program 22 times [2024-02-07 14:25:31,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:25:31,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220313691] [2024-02-07 14:25:31,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:25:31,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:25:31,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:25:31,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:25:31,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:25:31,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220313691] [2024-02-07 14:25:31,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220313691] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:25:31,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:25:31,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-07 14:25:31,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043597793] [2024-02-07 14:25:31,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:25:31,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 14:25:31,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:25:31,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 14:25:31,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-02-07 14:25:31,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 14:25:31,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 201 transitions, 2971 flow. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:31,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:25:31,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 14:25:31,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:25:33,468 INFO L124 PetriNetUnfolderBase]: 6948/13822 cut-off events. [2024-02-07 14:25:33,468 INFO L125 PetriNetUnfolderBase]: For 79361/79361 co-relation queries the response was YES. [2024-02-07 14:25:33,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46278 conditions, 13822 events. 6948/13822 cut-off events. For 79361/79361 co-relation queries the response was YES. Maximal size of possible extension queue 785. Compared 122510 event pairs, 2672 based on Foata normal form. 8/13347 useless extension candidates. Maximal degree in co-relation 46186. Up to 7642 conditions per place. [2024-02-07 14:25:33,611 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 239 selfloop transitions, 37 changer transitions 0/290 dead transitions. [2024-02-07 14:25:33,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 290 transitions, 4021 flow [2024-02-07 14:25:33,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-07 14:25:33,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-07 14:25:33,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 262 transitions. [2024-02-07 14:25:33,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46953405017921146 [2024-02-07 14:25:33,613 INFO L175 Difference]: Start difference. First operand has 264 places, 201 transitions, 2971 flow. Second operand 9 states and 262 transitions. [2024-02-07 14:25:33,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 290 transitions, 4021 flow [2024-02-07 14:25:34,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 290 transitions, 3950 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-02-07 14:25:34,133 INFO L231 Difference]: Finished difference. Result has 268 places, 203 transitions, 3053 flow [2024-02-07 14:25:34,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=2900, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3053, PETRI_PLACES=268, PETRI_TRANSITIONS=203} [2024-02-07 14:25:34,134 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 200 predicate places. [2024-02-07 14:25:34,134 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 203 transitions, 3053 flow [2024-02-07 14:25:34,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:34,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:25:34,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:25:34,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-02-07 14:25:34,135 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:25:34,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:25:34,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1067039063, now seen corresponding path program 23 times [2024-02-07 14:25:34,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:25:34,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621774677] [2024-02-07 14:25:34,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:25:34,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:25:34,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:25:34,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:25:34,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:25:34,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621774677] [2024-02-07 14:25:34,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621774677] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:25:34,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:25:34,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-07 14:25:34,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120025191] [2024-02-07 14:25:34,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:25:34,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 14:25:34,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:25:34,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 14:25:34,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-02-07 14:25:34,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 14:25:34,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 203 transitions, 3053 flow. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:34,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:25:34,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 14:25:34,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:25:36,183 INFO L124 PetriNetUnfolderBase]: 7126/14240 cut-off events. [2024-02-07 14:25:36,183 INFO L125 PetriNetUnfolderBase]: For 87129/87129 co-relation queries the response was YES. [2024-02-07 14:25:36,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47721 conditions, 14240 events. 7126/14240 cut-off events. For 87129/87129 co-relation queries the response was YES. Maximal size of possible extension queue 805. Compared 127305 event pairs, 2596 based on Foata normal form. 8/13733 useless extension candidates. Maximal degree in co-relation 47626. Up to 7642 conditions per place. [2024-02-07 14:25:36,633 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 238 selfloop transitions, 40 changer transitions 0/292 dead transitions. [2024-02-07 14:25:36,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 292 transitions, 4097 flow [2024-02-07 14:25:36,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-07 14:25:36,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-07 14:25:36,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 262 transitions. [2024-02-07 14:25:36,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46953405017921146 [2024-02-07 14:25:36,634 INFO L175 Difference]: Start difference. First operand has 268 places, 203 transitions, 3053 flow. Second operand 9 states and 262 transitions. [2024-02-07 14:25:36,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 292 transitions, 4097 flow [2024-02-07 14:25:37,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 292 transitions, 3980 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-02-07 14:25:37,311 INFO L231 Difference]: Finished difference. Result has 274 places, 205 transitions, 3088 flow [2024-02-07 14:25:37,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=2952, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3088, PETRI_PLACES=274, PETRI_TRANSITIONS=205} [2024-02-07 14:25:37,312 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 206 predicate places. [2024-02-07 14:25:37,312 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 205 transitions, 3088 flow [2024-02-07 14:25:37,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:37,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:25:37,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:25:37,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-02-07 14:25:37,313 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:25:37,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:25:37,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1469889079, now seen corresponding path program 24 times [2024-02-07 14:25:37,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:25:37,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52107175] [2024-02-07 14:25:37,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:25:37,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:25:37,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:25:37,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:25:37,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:25:37,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52107175] [2024-02-07 14:25:37,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52107175] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:25:37,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:25:37,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-07 14:25:37,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587359317] [2024-02-07 14:25:37,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:25:37,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 14:25:37,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:25:37,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 14:25:37,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-02-07 14:25:37,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 14:25:37,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 205 transitions, 3088 flow. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:37,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:25:37,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 14:25:37,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:25:39,273 INFO L124 PetriNetUnfolderBase]: 7114/14234 cut-off events. [2024-02-07 14:25:39,273 INFO L125 PetriNetUnfolderBase]: For 86769/86769 co-relation queries the response was YES. [2024-02-07 14:25:39,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47482 conditions, 14234 events. 7114/14234 cut-off events. For 86769/86769 co-relation queries the response was YES. Maximal size of possible extension queue 805. Compared 127054 event pairs, 3352 based on Foata normal form. 8/13727 useless extension candidates. Maximal degree in co-relation 47384. Up to 10907 conditions per place. [2024-02-07 14:25:39,700 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 225 selfloop transitions, 26 changer transitions 0/265 dead transitions. [2024-02-07 14:25:39,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 265 transitions, 3827 flow [2024-02-07 14:25:39,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-07 14:25:39,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-07 14:25:39,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 244 transitions. [2024-02-07 14:25:39,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43727598566308246 [2024-02-07 14:25:39,702 INFO L175 Difference]: Start difference. First operand has 274 places, 205 transitions, 3088 flow. Second operand 9 states and 244 transitions. [2024-02-07 14:25:39,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 265 transitions, 3827 flow [2024-02-07 14:25:40,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 265 transitions, 3766 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-02-07 14:25:40,549 INFO L231 Difference]: Finished difference. Result has 280 places, 207 transitions, 3123 flow [2024-02-07 14:25:40,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=3027, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3123, PETRI_PLACES=280, PETRI_TRANSITIONS=207} [2024-02-07 14:25:40,550 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 212 predicate places. [2024-02-07 14:25:40,550 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 207 transitions, 3123 flow [2024-02-07 14:25:40,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:40,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:25:40,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:25:40,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-02-07 14:25:40,551 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:25:40,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:25:40,552 INFO L85 PathProgramCache]: Analyzing trace with hash -731479799, now seen corresponding path program 25 times [2024-02-07 14:25:40,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:25:40,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179423376] [2024-02-07 14:25:40,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:25:40,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:25:40,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:25:40,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:25:40,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:25:40,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179423376] [2024-02-07 14:25:40,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179423376] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:25:40,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:25:40,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-07 14:25:40,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303942318] [2024-02-07 14:25:40,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:25:40,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 14:25:40,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:25:40,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 14:25:40,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-02-07 14:25:40,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 14:25:40,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 207 transitions, 3123 flow. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:40,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:25:40,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 14:25:40,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:25:42,951 INFO L124 PetriNetUnfolderBase]: 7102/14202 cut-off events. [2024-02-07 14:25:42,951 INFO L125 PetriNetUnfolderBase]: For 83120/83120 co-relation queries the response was YES. [2024-02-07 14:25:43,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47407 conditions, 14202 events. 7102/14202 cut-off events. For 83120/83120 co-relation queries the response was YES. Maximal size of possible extension queue 805. Compared 127000 event pairs, 2656 based on Foata normal form. 8/13695 useless extension candidates. Maximal degree in co-relation 47306. Up to 7642 conditions per place. [2024-02-07 14:25:43,210 INFO L140 encePairwiseOnDemand]: 53/62 looper letters, 233 selfloop transitions, 48 changer transitions 0/295 dead transitions. [2024-02-07 14:25:43,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 295 transitions, 4150 flow [2024-02-07 14:25:43,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 14:25:43,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 14:25:43,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 284 transitions. [2024-02-07 14:25:43,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45806451612903226 [2024-02-07 14:25:43,211 INFO L175 Difference]: Start difference. First operand has 280 places, 207 transitions, 3123 flow. Second operand 10 states and 284 transitions. [2024-02-07 14:25:43,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 295 transitions, 4150 flow [2024-02-07 14:25:43,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 295 transitions, 4100 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-02-07 14:25:43,772 INFO L231 Difference]: Finished difference. Result has 288 places, 209 transitions, 3243 flow [2024-02-07 14:25:43,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=3075, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3243, PETRI_PLACES=288, PETRI_TRANSITIONS=209} [2024-02-07 14:25:43,772 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 220 predicate places. [2024-02-07 14:25:43,772 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 209 transitions, 3243 flow [2024-02-07 14:25:43,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:43,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:25:43,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:25:43,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-02-07 14:25:43,773 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:25:43,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:25:43,774 INFO L85 PathProgramCache]: Analyzing trace with hash 217955657, now seen corresponding path program 26 times [2024-02-07 14:25:43,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:25:43,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324949169] [2024-02-07 14:25:43,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:25:43,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:25:43,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:25:43,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:25:43,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:25:43,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324949169] [2024-02-07 14:25:43,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324949169] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:25:43,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:25:43,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:25:43,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082876710] [2024-02-07 14:25:43,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:25:43,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-07 14:25:43,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:25:43,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-07 14:25:43,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-02-07 14:25:43,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 14:25:43,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 209 transitions, 3243 flow. Second operand has 9 states, 9 states have (on average 20.11111111111111) internal successors, (181), 9 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:43,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:25:43,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 14:25:43,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:25:46,232 INFO L124 PetriNetUnfolderBase]: 7090/14180 cut-off events. [2024-02-07 14:25:46,232 INFO L125 PetriNetUnfolderBase]: For 86281/86281 co-relation queries the response was YES. [2024-02-07 14:25:46,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47719 conditions, 14180 events. 7090/14180 cut-off events. For 86281/86281 co-relation queries the response was YES. Maximal size of possible extension queue 805. Compared 126829 event pairs, 2772 based on Foata normal form. 8/13673 useless extension candidates. Maximal degree in co-relation 47616. Up to 7642 conditions per place. [2024-02-07 14:25:46,383 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 241 selfloop transitions, 39 changer transitions 0/294 dead transitions. [2024-02-07 14:25:46,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 294 transitions, 4194 flow [2024-02-07 14:25:46,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-07 14:25:46,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-07 14:25:46,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 303 transitions. [2024-02-07 14:25:46,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4442815249266862 [2024-02-07 14:25:46,385 INFO L175 Difference]: Start difference. First operand has 288 places, 209 transitions, 3243 flow. Second operand 11 states and 303 transitions. [2024-02-07 14:25:46,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 294 transitions, 4194 flow [2024-02-07 14:25:47,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 294 transitions, 4151 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-02-07 14:25:47,027 INFO L231 Difference]: Finished difference. Result has 295 places, 209 transitions, 3281 flow [2024-02-07 14:25:47,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=3200, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3281, PETRI_PLACES=295, PETRI_TRANSITIONS=209} [2024-02-07 14:25:47,028 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 227 predicate places. [2024-02-07 14:25:47,028 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 209 transitions, 3281 flow [2024-02-07 14:25:47,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.11111111111111) internal successors, (181), 9 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:47,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:25:47,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:25:47,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-02-07 14:25:47,029 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:25:47,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:25:47,029 INFO L85 PathProgramCache]: Analyzing trace with hash -898381509, now seen corresponding path program 27 times [2024-02-07 14:25:47,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:25:47,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763802356] [2024-02-07 14:25:47,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:25:47,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:25:47,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:25:47,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:25:47,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:25:47,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763802356] [2024-02-07 14:25:47,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763802356] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:25:47,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:25:47,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-07 14:25:47,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772998735] [2024-02-07 14:25:47,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:25:47,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 14:25:47,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:25:47,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 14:25:47,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-02-07 14:25:47,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 14:25:47,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 209 transitions, 3281 flow. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:47,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:25:47,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 14:25:47,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:25:49,420 INFO L124 PetriNetUnfolderBase]: 7078/14200 cut-off events. [2024-02-07 14:25:49,420 INFO L125 PetriNetUnfolderBase]: For 86727/86727 co-relation queries the response was YES. [2024-02-07 14:25:49,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47744 conditions, 14200 events. 7078/14200 cut-off events. For 86727/86727 co-relation queries the response was YES. Maximal size of possible extension queue 805. Compared 127093 event pairs, 3160 based on Foata normal form. 8/13693 useless extension candidates. Maximal degree in co-relation 47640. Up to 10221 conditions per place. [2024-02-07 14:25:49,596 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 238 selfloop transitions, 28 changer transitions 0/280 dead transitions. [2024-02-07 14:25:49,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 280 transitions, 4073 flow [2024-02-07 14:25:49,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-07 14:25:49,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-07 14:25:49,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 253 transitions. [2024-02-07 14:25:49,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45340501792114696 [2024-02-07 14:25:49,598 INFO L175 Difference]: Start difference. First operand has 295 places, 209 transitions, 3281 flow. Second operand 9 states and 253 transitions. [2024-02-07 14:25:49,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 280 transitions, 4073 flow [2024-02-07 14:25:50,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 280 transitions, 4014 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-02-07 14:25:50,316 INFO L231 Difference]: Finished difference. Result has 298 places, 209 transitions, 3281 flow [2024-02-07 14:25:50,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=3222, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3281, PETRI_PLACES=298, PETRI_TRANSITIONS=209} [2024-02-07 14:25:50,316 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 230 predicate places. [2024-02-07 14:25:50,317 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 209 transitions, 3281 flow [2024-02-07 14:25:50,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:50,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:25:50,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:25:50,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-02-07 14:25:50,317 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:25:50,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:25:50,318 INFO L85 PathProgramCache]: Analyzing trace with hash -2118887347, now seen corresponding path program 28 times [2024-02-07 14:25:50,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:25:50,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052785084] [2024-02-07 14:25:50,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:25:50,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:25:50,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:25:50,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:25:50,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:25:50,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052785084] [2024-02-07 14:25:50,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052785084] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:25:50,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:25:50,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:25:50,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456366891] [2024-02-07 14:25:50,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:25:50,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 14:25:50,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:25:50,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 14:25:50,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-02-07 14:25:50,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 14:25:50,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 209 transitions, 3281 flow. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:50,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:25:50,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 14:25:50,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:25:52,788 INFO L124 PetriNetUnfolderBase]: 7082/14080 cut-off events. [2024-02-07 14:25:52,788 INFO L125 PetriNetUnfolderBase]: For 85273/85273 co-relation queries the response was YES. [2024-02-07 14:25:52,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47583 conditions, 14080 events. 7082/14080 cut-off events. For 85273/85273 co-relation queries the response was YES. Maximal size of possible extension queue 788. Compared 124778 event pairs, 4695 based on Foata normal form. 8/13529 useless extension candidates. Maximal degree in co-relation 47478. Up to 9743 conditions per place. [2024-02-07 14:25:52,950 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 201 selfloop transitions, 70 changer transitions 0/285 dead transitions. [2024-02-07 14:25:52,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 285 transitions, 4315 flow [2024-02-07 14:25:52,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 14:25:52,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 14:25:52,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 233 transitions. [2024-02-07 14:25:52,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46975806451612906 [2024-02-07 14:25:52,951 INFO L175 Difference]: Start difference. First operand has 298 places, 209 transitions, 3281 flow. Second operand 8 states and 233 transitions. [2024-02-07 14:25:52,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 285 transitions, 4315 flow [2024-02-07 14:25:53,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 285 transitions, 4270 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-02-07 14:25:53,589 INFO L231 Difference]: Finished difference. Result has 304 places, 213 transitions, 3478 flow [2024-02-07 14:25:53,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=3236, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3478, PETRI_PLACES=304, PETRI_TRANSITIONS=213} [2024-02-07 14:25:53,590 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 236 predicate places. [2024-02-07 14:25:53,590 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 213 transitions, 3478 flow [2024-02-07 14:25:53,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:53,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:25:53,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:25:53,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-02-07 14:25:53,591 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:25:53,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:25:53,591 INFO L85 PathProgramCache]: Analyzing trace with hash 616380721, now seen corresponding path program 29 times [2024-02-07 14:25:53,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:25:53,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348079119] [2024-02-07 14:25:53,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:25:53,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:25:53,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:25:53,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:25:53,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:25:53,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348079119] [2024-02-07 14:25:53,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348079119] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:25:53,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:25:53,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:25:53,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204795162] [2024-02-07 14:25:53,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:25:53,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 14:25:53,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:25:53,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 14:25:53,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-02-07 14:25:53,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 14:25:53,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 213 transitions, 3478 flow. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:53,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:25:53,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 14:25:53,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:25:56,516 INFO L124 PetriNetUnfolderBase]: 7966/15869 cut-off events. [2024-02-07 14:25:56,516 INFO L125 PetriNetUnfolderBase]: For 116891/116891 co-relation queries the response was YES. [2024-02-07 14:25:56,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54645 conditions, 15869 events. 7966/15869 cut-off events. For 116891/116891 co-relation queries the response was YES. Maximal size of possible extension queue 895. Compared 144059 event pairs, 5105 based on Foata normal form. 8/15233 useless extension candidates. Maximal degree in co-relation 54536. Up to 10403 conditions per place. [2024-02-07 14:25:56,712 INFO L140 encePairwiseOnDemand]: 55/62 looper letters, 221 selfloop transitions, 68 changer transitions 0/303 dead transitions. [2024-02-07 14:25:56,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 303 transitions, 4765 flow [2024-02-07 14:25:56,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 14:25:56,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 14:25:56,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 237 transitions. [2024-02-07 14:25:56,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4778225806451613 [2024-02-07 14:25:56,714 INFO L175 Difference]: Start difference. First operand has 304 places, 213 transitions, 3478 flow. Second operand 8 states and 237 transitions. [2024-02-07 14:25:56,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 303 transitions, 4765 flow [2024-02-07 14:25:57,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 303 transitions, 4423 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-02-07 14:25:57,525 INFO L231 Difference]: Finished difference. Result has 309 places, 217 transitions, 3424 flow [2024-02-07 14:25:57,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=3181, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3424, PETRI_PLACES=309, PETRI_TRANSITIONS=217} [2024-02-07 14:25:57,526 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 241 predicate places. [2024-02-07 14:25:57,526 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 217 transitions, 3424 flow [2024-02-07 14:25:57,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:57,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:25:57,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:25:57,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-02-07 14:25:57,527 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:25:57,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:25:57,527 INFO L85 PathProgramCache]: Analyzing trace with hash 2095761153, now seen corresponding path program 30 times [2024-02-07 14:25:57,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:25:57,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781531749] [2024-02-07 14:25:57,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:25:57,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:25:57,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:25:57,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:25:57,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:25:57,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781531749] [2024-02-07 14:25:57,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781531749] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:25:57,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:25:57,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:25:57,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401046863] [2024-02-07 14:25:57,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:25:57,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 14:25:57,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:25:57,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 14:25:57,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-02-07 14:25:57,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 14:25:57,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 217 transitions, 3424 flow. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:25:57,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:25:57,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 14:25:57,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:26:00,399 INFO L124 PetriNetUnfolderBase]: 8315/16610 cut-off events. [2024-02-07 14:26:00,399 INFO L125 PetriNetUnfolderBase]: For 121825/121825 co-relation queries the response was YES. [2024-02-07 14:26:00,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56263 conditions, 16610 events. 8315/16610 cut-off events. For 121825/121825 co-relation queries the response was YES. Maximal size of possible extension queue 939. Compared 152263 event pairs, 5667 based on Foata normal form. 8/15938 useless extension candidates. Maximal degree in co-relation 56152. Up to 11813 conditions per place. [2024-02-07 14:26:00,635 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 210 selfloop transitions, 75 changer transitions 0/299 dead transitions. [2024-02-07 14:26:00,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 299 transitions, 4534 flow [2024-02-07 14:26:00,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 14:26:00,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 14:26:00,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 274 transitions. [2024-02-07 14:26:00,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44193548387096776 [2024-02-07 14:26:00,636 INFO L175 Difference]: Start difference. First operand has 309 places, 217 transitions, 3424 flow. Second operand 10 states and 274 transitions. [2024-02-07 14:26:00,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 299 transitions, 4534 flow [2024-02-07 14:26:01,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 299 transitions, 4276 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-02-07 14:26:01,408 INFO L231 Difference]: Finished difference. Result has 318 places, 222 transitions, 3453 flow [2024-02-07 14:26:01,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=3196, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3453, PETRI_PLACES=318, PETRI_TRANSITIONS=222} [2024-02-07 14:26:01,409 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 250 predicate places. [2024-02-07 14:26:01,409 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 222 transitions, 3453 flow [2024-02-07 14:26:01,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:26:01,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:26:01,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:26:01,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-02-07 14:26:01,410 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:26:01,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:26:01,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1140072755, now seen corresponding path program 31 times [2024-02-07 14:26:01,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:26:01,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772685531] [2024-02-07 14:26:01,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:26:01,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:26:01,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:26:01,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:26:01,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:26:01,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772685531] [2024-02-07 14:26:01,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772685531] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:26:01,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:26:01,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-07 14:26:01,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473668413] [2024-02-07 14:26:01,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:26:01,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:26:01,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:26:01,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:26:01,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:26:01,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 14:26:01,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 222 transitions, 3453 flow. Second operand has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:26:01,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:26:01,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 14:26:01,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:26:04,423 INFO L124 PetriNetUnfolderBase]: 8477/17157 cut-off events. [2024-02-07 14:26:04,424 INFO L125 PetriNetUnfolderBase]: For 120438/120438 co-relation queries the response was YES. [2024-02-07 14:26:04,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56482 conditions, 17157 events. 8477/17157 cut-off events. For 120438/120438 co-relation queries the response was YES. Maximal size of possible extension queue 981. Compared 160047 event pairs, 3093 based on Foata normal form. 8/16494 useless extension candidates. Maximal degree in co-relation 56369. Up to 11279 conditions per place. [2024-02-07 14:26:04,681 INFO L140 encePairwiseOnDemand]: 55/62 looper letters, 215 selfloop transitions, 61 changer transitions 0/290 dead transitions. [2024-02-07 14:26:04,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 290 transitions, 4436 flow [2024-02-07 14:26:04,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:26:04,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:26:04,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 206 transitions. [2024-02-07 14:26:04,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47465437788018433 [2024-02-07 14:26:04,682 INFO L175 Difference]: Start difference. First operand has 318 places, 222 transitions, 3453 flow. Second operand 7 states and 206 transitions. [2024-02-07 14:26:04,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 290 transitions, 4436 flow [2024-02-07 14:26:05,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 290 transitions, 4264 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-02-07 14:26:05,736 INFO L231 Difference]: Finished difference. Result has 324 places, 224 transitions, 3467 flow [2024-02-07 14:26:05,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=3281, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3467, PETRI_PLACES=324, PETRI_TRANSITIONS=224} [2024-02-07 14:26:05,737 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 256 predicate places. [2024-02-07 14:26:05,737 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 224 transitions, 3467 flow [2024-02-07 14:26:05,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:26:05,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:26:05,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:26:05,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-02-07 14:26:05,738 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:26:05,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:26:05,738 INFO L85 PathProgramCache]: Analyzing trace with hash -54127029, now seen corresponding path program 32 times [2024-02-07 14:26:05,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:26:05,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060412210] [2024-02-07 14:26:05,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:26:05,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:26:05,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:26:05,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:26:05,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:26:05,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060412210] [2024-02-07 14:26:05,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060412210] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:26:05,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:26:05,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:26:05,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656525597] [2024-02-07 14:26:05,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:26:05,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 14:26:05,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:26:05,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 14:26:05,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-02-07 14:26:05,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 14:26:05,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 224 transitions, 3467 flow. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:26:05,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:26:05,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 14:26:05,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:26:09,072 INFO L124 PetriNetUnfolderBase]: 8465/16936 cut-off events. [2024-02-07 14:26:09,073 INFO L125 PetriNetUnfolderBase]: For 120788/120788 co-relation queries the response was YES. [2024-02-07 14:26:09,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56128 conditions, 16936 events. 8465/16936 cut-off events. For 120788/120788 co-relation queries the response was YES. Maximal size of possible extension queue 961. Compared 156014 event pairs, 5833 based on Foata normal form. 8/16248 useless extension candidates. Maximal degree in co-relation 56012. Up to 12079 conditions per place. [2024-02-07 14:26:09,473 INFO L140 encePairwiseOnDemand]: 55/62 looper letters, 204 selfloop transitions, 73 changer transitions 0/291 dead transitions. [2024-02-07 14:26:09,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 291 transitions, 4364 flow [2024-02-07 14:26:09,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 14:26:09,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 14:26:09,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-02-07 14:26:09,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46169354838709675 [2024-02-07 14:26:09,475 INFO L175 Difference]: Start difference. First operand has 324 places, 224 transitions, 3467 flow. Second operand 8 states and 229 transitions. [2024-02-07 14:26:09,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 291 transitions, 4364 flow [2024-02-07 14:26:10,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 291 transitions, 4114 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-02-07 14:26:10,576 INFO L231 Difference]: Finished difference. Result has 327 places, 224 transitions, 3366 flow [2024-02-07 14:26:10,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=3217, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3366, PETRI_PLACES=327, PETRI_TRANSITIONS=224} [2024-02-07 14:26:10,577 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 259 predicate places. [2024-02-07 14:26:10,577 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 224 transitions, 3366 flow [2024-02-07 14:26:10,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:26:10,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:26:10,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:26:10,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-02-07 14:26:10,578 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err1ASSERT_VIOLATIONWITNESS_INVARIANT, P0Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 38 more)] === [2024-02-07 14:26:10,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:26:10,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1026663671, now seen corresponding path program 33 times [2024-02-07 14:26:10,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:26:10,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891783907] [2024-02-07 14:26:10,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:26:10,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:26:10,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:26:10,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:26:10,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:26:10,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891783907] [2024-02-07 14:26:10,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891783907] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:26:10,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:26:10,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:26:10,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024664678] [2024-02-07 14:26:10,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:26:10,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 14:26:10,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:26:10,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 14:26:10,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-02-07 14:26:10,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-02-07 14:26:10,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 224 transitions, 3366 flow. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:26:10,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:26:10,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-02-07 14:26:10,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand