./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe032_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe032_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe032_tso.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe032_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 20:17:08,530 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 20:17:08,592 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 20:17:08,596 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 20:17:08,597 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 20:17:08,621 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 20:17:08,622 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 20:17:08,622 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 20:17:08,622 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 20:17:08,625 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 20:17:08,626 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 20:17:08,626 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 20:17:08,626 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 20:17:08,627 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 20:17:08,627 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 20:17:08,628 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 20:17:08,628 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 20:17:08,628 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 20:17:08,628 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 20:17:08,628 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 20:17:08,629 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 20:17:08,629 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 20:17:08,629 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 20:17:08,629 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 20:17:08,629 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 20:17:08,630 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 20:17:08,630 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 20:17:08,630 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 20:17:08,631 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 20:17:08,631 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 20:17:08,631 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 20:17:08,632 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 20:17:08,632 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:17:08,632 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 20:17:08,632 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 20:17:08,632 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 20:17:08,633 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 20:17:08,633 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 20:17:08,633 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 20:17:08,633 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 20:17:08,633 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 20:17:08,633 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 20:17:08,634 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 20:17:08,634 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 20:17:08,807 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 20:17:08,822 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 20:17:08,824 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 20:17:08,825 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 20:17:08,825 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 20:17:08,826 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe032_tso.i [2024-06-21 20:17:09,870 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 20:17:10,096 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 20:17:10,097 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe032_tso.i [2024-06-21 20:17:10,115 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c03d7363/acd0f80e32fa405e9c430135304e49c5/FLAG2a399eddc [2024-06-21 20:17:10,127 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c03d7363/acd0f80e32fa405e9c430135304e49c5 [2024-06-21 20:17:10,129 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 20:17:10,129 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 20:17:10,131 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe032_tso.yml/witness.yml [2024-06-21 20:17:10,230 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 20:17:10,231 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 20:17:10,232 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 20:17:10,232 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 20:17:10,240 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 20:17:10,241 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:17:10" (1/2) ... [2024-06-21 20:17:10,242 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3927d878 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:17:10, skipping insertion in model container [2024-06-21 20:17:10,242 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:17:10" (1/2) ... [2024-06-21 20:17:10,243 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@15646fa9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:17:10, skipping insertion in model container [2024-06-21 20:17:10,244 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:17:10" (2/2) ... [2024-06-21 20:17:10,244 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3927d878 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:17:10, skipping insertion in model container [2024-06-21 20:17:10,244 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:17:10" (2/2) ... [2024-06-21 20:17:10,245 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 20:17:10,283 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 20:17:10,285 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] (((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((((0 <= __unbuffered_cnt && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-21 20:17:10,285 INFO L97 edCorrectnessWitness]: Location invariant before [L786-L786] (((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((((0 <= __unbuffered_cnt && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-21 20:17:10,285 INFO L97 edCorrectnessWitness]: Location invariant before [L785-L785] (((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((((0 <= __unbuffered_cnt && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-21 20:17:10,285 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 20:17:10,285 INFO L106 edCorrectnessWitness]: ghost_update [L781-L781] multithreaded = 1; [2024-06-21 20:17:10,326 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 20:17:10,664 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:17:10,673 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 20:17:10,771 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:17:10,798 INFO L206 MainTranslator]: Completed translation [2024-06-21 20:17:10,798 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:17:10 WrapperNode [2024-06-21 20:17:10,799 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 20:17:10,799 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 20:17:10,800 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 20:17:10,800 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 20:17:10,805 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:17:10" (1/1) ... [2024-06-21 20:17:10,817 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:17:10" (1/1) ... [2024-06-21 20:17:10,842 INFO L138 Inliner]: procedures = 175, calls = 46, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 65 [2024-06-21 20:17:10,842 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 20:17:10,843 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 20:17:10,843 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 20:17:10,843 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 20:17:10,850 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:17:10" (1/1) ... [2024-06-21 20:17:10,851 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:17:10" (1/1) ... [2024-06-21 20:17:10,853 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:17:10" (1/1) ... [2024-06-21 20:17:10,862 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 20:17:10,863 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:17:10" (1/1) ... [2024-06-21 20:17:10,863 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:17:10" (1/1) ... [2024-06-21 20:17:10,867 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:17:10" (1/1) ... [2024-06-21 20:17:10,893 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:17:10" (1/1) ... [2024-06-21 20:17:10,894 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:17:10" (1/1) ... [2024-06-21 20:17:10,895 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:17:10" (1/1) ... [2024-06-21 20:17:10,897 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 20:17:10,898 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 20:17:10,898 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 20:17:10,898 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 20:17:10,898 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:17:10" (1/1) ... [2024-06-21 20:17:10,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:17:10,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 20:17:10,944 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 20:17:10,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 20:17:10,999 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 20:17:10,999 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 20:17:11,000 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 20:17:11,000 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 20:17:11,000 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 20:17:11,001 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 20:17:11,001 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 20:17:11,001 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 20:17:11,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 20:17:11,001 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 20:17:11,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 20:17:11,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 20:17:11,003 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 20:17:11,132 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 20:17:11,134 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 20:17:11,276 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 20:17:11,276 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 20:17:11,343 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 20:17:11,344 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 20:17:11,344 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:17:11 BoogieIcfgContainer [2024-06-21 20:17:11,344 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 20:17:11,345 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 20:17:11,346 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 20:17:11,348 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 20:17:11,348 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 08:17:10" (1/4) ... [2024-06-21 20:17:11,349 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14cc25d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:17:11, skipping insertion in model container [2024-06-21 20:17:11,349 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:17:10" (2/4) ... [2024-06-21 20:17:11,349 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14cc25d8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:17:11, skipping insertion in model container [2024-06-21 20:17:11,350 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:17:10" (3/4) ... [2024-06-21 20:17:11,350 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14cc25d8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:17:11, skipping insertion in model container [2024-06-21 20:17:11,350 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:17:11" (4/4) ... [2024-06-21 20:17:11,351 INFO L112 eAbstractionObserver]: Analyzing ICFG safe032_tso.i [2024-06-21 20:17:11,365 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 20:17:11,365 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 20:17:11,365 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 20:17:11,416 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 20:17:11,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 20:17:11,464 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-21 20:17:11,464 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:17:11,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 72 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 20:17:11,466 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 20:17:11,468 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-21 20:17:11,475 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 20:17:11,483 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;@3e920eef, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 20:17:11,483 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 20:17:11,493 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 20:17:11,493 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 20:17:11,493 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:17:11,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:11,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 20:17:11,495 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:11,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:11,501 INFO L85 PathProgramCache]: Analyzing trace with hash 219070604, now seen corresponding path program 1 times [2024-06-21 20:17:11,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:11,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795499737] [2024-06-21 20:17:11,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:11,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:11,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:11,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:11,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:11,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795499737] [2024-06-21 20:17:11,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795499737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:11,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:11,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 20:17:11,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810519113] [2024-06-21 20:17:11,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:11,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 20:17:11,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:11,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 20:17:11,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 20:17:11,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-06-21 20:17:11,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 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) [2024-06-21 20:17:11,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:11,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-06-21 20:17:11,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:12,115 INFO L124 PetriNetUnfolderBase]: 575/990 cut-off events. [2024-06-21 20:17:12,116 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-06-21 20:17:12,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1930 conditions, 990 events. 575/990 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5172 event pairs, 361 based on Foata normal form. 1/922 useless extension candidates. Maximal degree in co-relation 1918. Up to 885 conditions per place. [2024-06-21 20:17:12,129 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 28 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-21 20:17:12,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 165 flow [2024-06-21 20:17:12,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 20:17:12,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 20:17:12,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2024-06-21 20:17:12,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7063492063492064 [2024-06-21 20:17:12,142 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 89 transitions. [2024-06-21 20:17:12,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 165 flow [2024-06-21 20:17:12,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 160 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 20:17:12,147 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-21 20:17:12,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-21 20:17:12,152 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-21 20:17:12,152 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-21 20:17:12,152 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) [2024-06-21 20:17:12,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:12,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:12,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 20:17:12,153 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:12,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:12,155 INFO L85 PathProgramCache]: Analyzing trace with hash 73488363, now seen corresponding path program 1 times [2024-06-21 20:17:12,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:12,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123201283] [2024-06-21 20:17:12,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:12,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:12,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:12,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:12,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:12,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123201283] [2024-06-21 20:17:12,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123201283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:12,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:12,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 20:17:12,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410363568] [2024-06-21 20:17:12,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:12,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 20:17:12,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:12,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 20:17:12,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 20:17:12,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-06-21 20:17:12,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:12,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:12,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-06-21 20:17:12,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:12,485 INFO L124 PetriNetUnfolderBase]: 569/966 cut-off events. [2024-06-21 20:17:12,485 INFO L125 PetriNetUnfolderBase]: For 205/205 co-relation queries the response was YES. [2024-06-21 20:17:12,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2201 conditions, 966 events. 569/966 cut-off events. For 205/205 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4919 event pairs, 293 based on Foata normal form. 3/937 useless extension candidates. Maximal degree in co-relation 2189. Up to 861 conditions per place. [2024-06-21 20:17:12,491 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 35 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-21 20:17:12,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 232 flow [2024-06-21 20:17:12,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:17:12,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:17:12,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 117 transitions. [2024-06-21 20:17:12,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6964285714285714 [2024-06-21 20:17:12,496 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 117 transitions. [2024-06-21 20:17:12,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 232 flow [2024-06-21 20:17:12,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 228 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 20:17:12,499 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-21 20:17:12,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-21 20:17:12,499 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-21 20:17:12,500 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-21 20:17:12,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:12,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:12,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:12,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 20:17:12,503 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:12,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:12,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1951982098, now seen corresponding path program 1 times [2024-06-21 20:17:12,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:12,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814099128] [2024-06-21 20:17:12,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:12,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:12,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:12,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:12,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:12,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814099128] [2024-06-21 20:17:12,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814099128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:12,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:12,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 20:17:12,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73189942] [2024-06-21 20:17:12,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:12,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 20:17:12,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:12,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 20:17:12,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 20:17:12,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:12,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:12,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:12,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:12,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:12,757 INFO L124 PetriNetUnfolderBase]: 936/1529 cut-off events. [2024-06-21 20:17:12,757 INFO L125 PetriNetUnfolderBase]: For 772/772 co-relation queries the response was YES. [2024-06-21 20:17:12,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3853 conditions, 1529 events. 936/1529 cut-off events. For 772/772 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7770 event pairs, 533 based on Foata normal form. 3/1530 useless extension candidates. Maximal degree in co-relation 3839. Up to 1395 conditions per place. [2024-06-21 20:17:12,768 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 39 selfloop transitions, 11 changer transitions 0/59 dead transitions. [2024-06-21 20:17:12,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 59 transitions, 300 flow [2024-06-21 20:17:12,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:17:12,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:17:12,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 111 transitions. [2024-06-21 20:17:12,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6607142857142857 [2024-06-21 20:17:12,772 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 4 states and 111 transitions. [2024-06-21 20:17:12,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 59 transitions, 300 flow [2024-06-21 20:17:12,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 59 transitions, 286 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 20:17:12,775 INFO L231 Difference]: Finished difference. Result has 49 places, 47 transitions, 202 flow [2024-06-21 20:17:12,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=202, PETRI_PLACES=49, PETRI_TRANSITIONS=47} [2024-06-21 20:17:12,776 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 6 predicate places. [2024-06-21 20:17:12,776 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 47 transitions, 202 flow [2024-06-21 20:17:12,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:12,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:12,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:12,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 20:17:12,777 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:12,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:12,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1501446107, now seen corresponding path program 1 times [2024-06-21 20:17:12,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:12,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793329915] [2024-06-21 20:17:12,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:12,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:12,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:12,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:12,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:12,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793329915] [2024-06-21 20:17:12,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793329915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:12,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:12,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:17:12,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769314649] [2024-06-21 20:17:12,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:12,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:17:12,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:12,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:17:12,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:17:12,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 42 [2024-06-21 20:17:12,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 202 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:12,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:12,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 42 [2024-06-21 20:17:12,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:13,163 INFO L124 PetriNetUnfolderBase]: 857/1493 cut-off events. [2024-06-21 20:17:13,164 INFO L125 PetriNetUnfolderBase]: For 1498/1498 co-relation queries the response was YES. [2024-06-21 20:17:13,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4117 conditions, 1493 events. 857/1493 cut-off events. For 1498/1498 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7940 event pairs, 254 based on Foata normal form. 6/1463 useless extension candidates. Maximal degree in co-relation 4101. Up to 1227 conditions per place. [2024-06-21 20:17:13,173 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 53 selfloop transitions, 12 changer transitions 0/77 dead transitions. [2024-06-21 20:17:13,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 77 transitions, 418 flow [2024-06-21 20:17:13,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:13,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:13,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 164 transitions. [2024-06-21 20:17:13,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6507936507936508 [2024-06-21 20:17:13,175 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 202 flow. Second operand 6 states and 164 transitions. [2024-06-21 20:17:13,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 77 transitions, 418 flow [2024-06-21 20:17:13,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 77 transitions, 412 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-21 20:17:13,178 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 257 flow [2024-06-21 20:17:13,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=257, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-06-21 20:17:13,179 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2024-06-21 20:17:13,179 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 257 flow [2024-06-21 20:17:13,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:13,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:13,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:13,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 20:17:13,180 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:13,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:13,181 INFO L85 PathProgramCache]: Analyzing trace with hash 408460797, now seen corresponding path program 1 times [2024-06-21 20:17:13,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:13,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492045696] [2024-06-21 20:17:13,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:13,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:13,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:13,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:13,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:13,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492045696] [2024-06-21 20:17:13,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492045696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:13,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:13,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:17:13,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834617953] [2024-06-21 20:17:13,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:13,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:17:13,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:13,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:17:13,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:17:13,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:13,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 257 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:13,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:13,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:13,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:13,420 INFO L124 PetriNetUnfolderBase]: 968/1626 cut-off events. [2024-06-21 20:17:13,421 INFO L125 PetriNetUnfolderBase]: For 2753/2753 co-relation queries the response was YES. [2024-06-21 20:17:13,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5011 conditions, 1626 events. 968/1626 cut-off events. For 2753/2753 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8546 event pairs, 346 based on Foata normal form. 4/1622 useless extension candidates. Maximal degree in co-relation 4991. Up to 1333 conditions per place. [2024-06-21 20:17:13,432 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 57 selfloop transitions, 22 changer transitions 0/88 dead transitions. [2024-06-21 20:17:13,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 88 transitions, 575 flow [2024-06-21 20:17:13,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:17:13,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:17:13,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 144 transitions. [2024-06-21 20:17:13,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6857142857142857 [2024-06-21 20:17:13,434 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 257 flow. Second operand 5 states and 144 transitions. [2024-06-21 20:17:13,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 88 transitions, 575 flow [2024-06-21 20:17:13,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 88 transitions, 544 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 20:17:13,442 INFO L231 Difference]: Finished difference. Result has 59 places, 65 transitions, 383 flow [2024-06-21 20:17:13,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=383, PETRI_PLACES=59, PETRI_TRANSITIONS=65} [2024-06-21 20:17:13,444 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-21 20:17:13,444 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 65 transitions, 383 flow [2024-06-21 20:17:13,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:13,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:13,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:13,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 20:17:13,446 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:13,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:13,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1067838237, now seen corresponding path program 2 times [2024-06-21 20:17:13,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:13,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992186193] [2024-06-21 20:17:13,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:13,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:13,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:13,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:13,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:13,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992186193] [2024-06-21 20:17:13,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992186193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:13,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:13,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:17:13,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395745583] [2024-06-21 20:17:13,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:13,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:17:13,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:13,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:17:13,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:17:13,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:13,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 65 transitions, 383 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:13,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:13,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:13,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:13,676 INFO L124 PetriNetUnfolderBase]: 993/1672 cut-off events. [2024-06-21 20:17:13,676 INFO L125 PetriNetUnfolderBase]: For 4535/4535 co-relation queries the response was YES. [2024-06-21 20:17:13,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5991 conditions, 1672 events. 993/1672 cut-off events. For 4535/4535 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8857 event pairs, 374 based on Foata normal form. 4/1670 useless extension candidates. Maximal degree in co-relation 5968. Up to 1359 conditions per place. [2024-06-21 20:17:13,687 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 53 selfloop transitions, 30 changer transitions 0/92 dead transitions. [2024-06-21 20:17:13,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 92 transitions, 691 flow [2024-06-21 20:17:13,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:17:13,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:17:13,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-06-21 20:17:13,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-21 20:17:13,688 INFO L175 Difference]: Start difference. First operand has 59 places, 65 transitions, 383 flow. Second operand 5 states and 140 transitions. [2024-06-21 20:17:13,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 92 transitions, 691 flow [2024-06-21 20:17:13,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 92 transitions, 661 flow, removed 15 selfloop flow, removed 0 redundant places. [2024-06-21 20:17:13,695 INFO L231 Difference]: Finished difference. Result has 66 places, 75 transitions, 546 flow [2024-06-21 20:17:13,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=546, PETRI_PLACES=66, PETRI_TRANSITIONS=75} [2024-06-21 20:17:13,696 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-21 20:17:13,696 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 75 transitions, 546 flow [2024-06-21 20:17:13,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:13,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:13,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:13,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 20:17:13,697 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:13,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:13,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1045936365, now seen corresponding path program 1 times [2024-06-21 20:17:13,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:13,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766253750] [2024-06-21 20:17:13,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:13,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:13,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:13,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:13,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:13,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766253750] [2024-06-21 20:17:13,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766253750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:13,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:13,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:17:13,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945753011] [2024-06-21 20:17:13,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:13,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:17:13,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:13,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:17:13,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:17:13,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:13,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 75 transitions, 546 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:13,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:13,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:13,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:13,957 INFO L124 PetriNetUnfolderBase]: 995/1682 cut-off events. [2024-06-21 20:17:13,958 INFO L125 PetriNetUnfolderBase]: For 5890/5890 co-relation queries the response was YES. [2024-06-21 20:17:13,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6465 conditions, 1682 events. 995/1682 cut-off events. For 5890/5890 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 8883 event pairs, 343 based on Foata normal form. 3/1683 useless extension candidates. Maximal degree in co-relation 6437. Up to 1456 conditions per place. [2024-06-21 20:17:13,983 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 72 selfloop transitions, 17 changer transitions 0/98 dead transitions. [2024-06-21 20:17:13,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 98 transitions, 822 flow [2024-06-21 20:17:13,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:17:13,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:17:13,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2024-06-21 20:17:13,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-21 20:17:13,985 INFO L175 Difference]: Start difference. First operand has 66 places, 75 transitions, 546 flow. Second operand 5 states and 135 transitions. [2024-06-21 20:17:13,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 98 transitions, 822 flow [2024-06-21 20:17:13,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 98 transitions, 789 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-21 20:17:13,991 INFO L231 Difference]: Finished difference. Result has 70 places, 82 transitions, 610 flow [2024-06-21 20:17:13,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=513, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=610, PETRI_PLACES=70, PETRI_TRANSITIONS=82} [2024-06-21 20:17:13,992 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-06-21 20:17:13,992 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 82 transitions, 610 flow [2024-06-21 20:17:13,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:13,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:13,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:13,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 20:17:13,993 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:13,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:13,993 INFO L85 PathProgramCache]: Analyzing trace with hash -628573029, now seen corresponding path program 1 times [2024-06-21 20:17:13,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:13,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677659313] [2024-06-21 20:17:13,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:13,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:13,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:14,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:14,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:14,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677659313] [2024-06-21 20:17:14,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677659313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:14,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:14,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 20:17:14,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750320767] [2024-06-21 20:17:14,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:14,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 20:17:14,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:14,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 20:17:14,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 20:17:14,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:14,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 82 transitions, 610 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:14,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:14,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:14,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:14,194 INFO L124 PetriNetUnfolderBase]: 983/1653 cut-off events. [2024-06-21 20:17:14,195 INFO L125 PetriNetUnfolderBase]: For 7065/7065 co-relation queries the response was YES. [2024-06-21 20:17:14,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6632 conditions, 1653 events. 983/1653 cut-off events. For 7065/7065 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8639 event pairs, 355 based on Foata normal form. 2/1651 useless extension candidates. Maximal degree in co-relation 6602. Up to 1462 conditions per place. [2024-06-21 20:17:14,206 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 70 selfloop transitions, 11 changer transitions 0/90 dead transitions. [2024-06-21 20:17:14,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 90 transitions, 792 flow [2024-06-21 20:17:14,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:17:14,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:17:14,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-06-21 20:17:14,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 20:17:14,207 INFO L175 Difference]: Start difference. First operand has 70 places, 82 transitions, 610 flow. Second operand 4 states and 105 transitions. [2024-06-21 20:17:14,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 90 transitions, 792 flow [2024-06-21 20:17:14,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 90 transitions, 762 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-06-21 20:17:14,218 INFO L231 Difference]: Finished difference. Result has 73 places, 82 transitions, 610 flow [2024-06-21 20:17:14,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=580, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=610, PETRI_PLACES=73, PETRI_TRANSITIONS=82} [2024-06-21 20:17:14,219 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-06-21 20:17:14,219 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 82 transitions, 610 flow [2024-06-21 20:17:14,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:14,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:14,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:14,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 20:17:14,219 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:14,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:14,220 INFO L85 PathProgramCache]: Analyzing trace with hash -199330566, now seen corresponding path program 1 times [2024-06-21 20:17:14,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:14,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328039153] [2024-06-21 20:17:14,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:14,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:14,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:14,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:14,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:14,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328039153] [2024-06-21 20:17:14,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328039153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:14,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:14,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:17:14,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514297175] [2024-06-21 20:17:14,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:14,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:17:14,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:14,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:17:14,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:17:14,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:14,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 82 transitions, 610 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:14,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:14,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:14,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:14,510 INFO L124 PetriNetUnfolderBase]: 1017/1708 cut-off events. [2024-06-21 20:17:14,510 INFO L125 PetriNetUnfolderBase]: For 8020/8020 co-relation queries the response was YES. [2024-06-21 20:17:14,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6973 conditions, 1708 events. 1017/1708 cut-off events. For 8020/8020 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 8944 event pairs, 334 based on Foata normal form. 3/1709 useless extension candidates. Maximal degree in co-relation 6940. Up to 1477 conditions per place. [2024-06-21 20:17:14,522 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 90 selfloop transitions, 18 changer transitions 0/117 dead transitions. [2024-06-21 20:17:14,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 117 transitions, 974 flow [2024-06-21 20:17:14,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:17:14,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:17:14,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 20:17:14,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156462585034014 [2024-06-21 20:17:14,523 INFO L175 Difference]: Start difference. First operand has 73 places, 82 transitions, 610 flow. Second operand 7 states and 181 transitions. [2024-06-21 20:17:14,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 117 transitions, 974 flow [2024-06-21 20:17:14,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 117 transitions, 946 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-21 20:17:14,534 INFO L231 Difference]: Finished difference. Result has 78 places, 90 transitions, 708 flow [2024-06-21 20:17:14,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=582, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=708, PETRI_PLACES=78, PETRI_TRANSITIONS=90} [2024-06-21 20:17:14,535 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 35 predicate places. [2024-06-21 20:17:14,535 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 90 transitions, 708 flow [2024-06-21 20:17:14,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:14,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:14,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:14,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 20:17:14,536 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:14,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:14,536 INFO L85 PathProgramCache]: Analyzing trace with hash -194568966, now seen corresponding path program 2 times [2024-06-21 20:17:14,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:14,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826844405] [2024-06-21 20:17:14,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:14,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:14,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:14,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:14,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:14,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826844405] [2024-06-21 20:17:14,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826844405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:14,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:14,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:17:14,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852208421] [2024-06-21 20:17:14,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:14,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:17:14,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:14,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:17:14,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:17:14,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:14,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 90 transitions, 708 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:14,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:14,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:14,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:14,850 INFO L124 PetriNetUnfolderBase]: 1074/1810 cut-off events. [2024-06-21 20:17:14,850 INFO L125 PetriNetUnfolderBase]: For 10612/10612 co-relation queries the response was YES. [2024-06-21 20:17:14,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7903 conditions, 1810 events. 1074/1810 cut-off events. For 10612/10612 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 9715 event pairs, 333 based on Foata normal form. 4/1806 useless extension candidates. Maximal degree in co-relation 7869. Up to 1342 conditions per place. [2024-06-21 20:17:14,862 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 74 selfloop transitions, 52 changer transitions 0/135 dead transitions. [2024-06-21 20:17:14,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 135 transitions, 1260 flow [2024-06-21 20:17:14,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:14,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:14,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-06-21 20:17:14,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6865079365079365 [2024-06-21 20:17:14,864 INFO L175 Difference]: Start difference. First operand has 78 places, 90 transitions, 708 flow. Second operand 6 states and 173 transitions. [2024-06-21 20:17:14,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 135 transitions, 1260 flow [2024-06-21 20:17:14,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 135 transitions, 1208 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-21 20:17:14,876 INFO L231 Difference]: Finished difference. Result has 82 places, 107 transitions, 943 flow [2024-06-21 20:17:14,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=943, PETRI_PLACES=82, PETRI_TRANSITIONS=107} [2024-06-21 20:17:14,877 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-21 20:17:14,877 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 107 transitions, 943 flow [2024-06-21 20:17:14,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:14,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:14,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:14,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 20:17:14,878 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:14,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:14,879 INFO L85 PathProgramCache]: Analyzing trace with hash -831125468, now seen corresponding path program 1 times [2024-06-21 20:17:14,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:14,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037108794] [2024-06-21 20:17:14,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:14,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:14,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:14,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:14,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:14,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037108794] [2024-06-21 20:17:14,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037108794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:14,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:14,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:17:14,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999692543] [2024-06-21 20:17:14,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:14,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:17:14,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:14,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:17:14,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:17:14,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:14,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 107 transitions, 943 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:14,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:14,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:14,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:15,186 INFO L124 PetriNetUnfolderBase]: 1107/1870 cut-off events. [2024-06-21 20:17:15,187 INFO L125 PetriNetUnfolderBase]: For 13716/13716 co-relation queries the response was YES. [2024-06-21 20:17:15,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8940 conditions, 1870 events. 1107/1870 cut-off events. For 13716/13716 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 10171 event pairs, 324 based on Foata normal form. 4/1865 useless extension candidates. Maximal degree in co-relation 8903. Up to 1424 conditions per place. [2024-06-21 20:17:15,200 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 96 selfloop transitions, 41 changer transitions 0/146 dead transitions. [2024-06-21 20:17:15,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 146 transitions, 1453 flow [2024-06-21 20:17:15,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:15,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:15,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 171 transitions. [2024-06-21 20:17:15,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6785714285714286 [2024-06-21 20:17:15,202 INFO L175 Difference]: Start difference. First operand has 82 places, 107 transitions, 943 flow. Second operand 6 states and 171 transitions. [2024-06-21 20:17:15,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 146 transitions, 1453 flow [2024-06-21 20:17:15,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 146 transitions, 1393 flow, removed 30 selfloop flow, removed 0 redundant places. [2024-06-21 20:17:15,219 INFO L231 Difference]: Finished difference. Result has 89 places, 120 transitions, 1106 flow [2024-06-21 20:17:15,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=887, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1106, PETRI_PLACES=89, PETRI_TRANSITIONS=120} [2024-06-21 20:17:15,220 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-21 20:17:15,220 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 120 transitions, 1106 flow [2024-06-21 20:17:15,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:15,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:15,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:15,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 20:17:15,221 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:15,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:15,221 INFO L85 PathProgramCache]: Analyzing trace with hash -747910820, now seen corresponding path program 3 times [2024-06-21 20:17:15,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:15,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637584370] [2024-06-21 20:17:15,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:15,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:15,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:15,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:15,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:15,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637584370] [2024-06-21 20:17:15,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637584370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:15,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:15,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:17:15,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745716008] [2024-06-21 20:17:15,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:15,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:17:15,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:15,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:17:15,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:17:15,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:15,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 120 transitions, 1106 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:15,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:15,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:15,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:15,515 INFO L124 PetriNetUnfolderBase]: 1122/1897 cut-off events. [2024-06-21 20:17:15,515 INFO L125 PetriNetUnfolderBase]: For 15861/15861 co-relation queries the response was YES. [2024-06-21 20:17:15,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9533 conditions, 1897 events. 1122/1897 cut-off events. For 15861/15861 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 10371 event pairs, 342 based on Foata normal form. 4/1895 useless extension candidates. Maximal degree in co-relation 9492. Up to 1407 conditions per place. [2024-06-21 20:17:15,529 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 85 selfloop transitions, 56 changer transitions 0/150 dead transitions. [2024-06-21 20:17:15,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 150 transitions, 1578 flow [2024-06-21 20:17:15,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:15,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:15,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-21 20:17:15,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6626984126984127 [2024-06-21 20:17:15,531 INFO L175 Difference]: Start difference. First operand has 89 places, 120 transitions, 1106 flow. Second operand 6 states and 167 transitions. [2024-06-21 20:17:15,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 150 transitions, 1578 flow [2024-06-21 20:17:15,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 150 transitions, 1529 flow, removed 21 selfloop flow, removed 1 redundant places. [2024-06-21 20:17:15,550 INFO L231 Difference]: Finished difference. Result has 95 places, 129 transitions, 1309 flow [2024-06-21 20:17:15,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1057, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1309, PETRI_PLACES=95, PETRI_TRANSITIONS=129} [2024-06-21 20:17:15,551 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 52 predicate places. [2024-06-21 20:17:15,551 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 129 transitions, 1309 flow [2024-06-21 20:17:15,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:15,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:15,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:15,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 20:17:15,552 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:15,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:15,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1916727322, now seen corresponding path program 2 times [2024-06-21 20:17:15,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:15,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67977751] [2024-06-21 20:17:15,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:15,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:15,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:15,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:15,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:15,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67977751] [2024-06-21 20:17:15,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67977751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:15,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:15,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:17:15,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412584008] [2024-06-21 20:17:15,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:15,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:17:15,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:15,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:17:15,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:17:15,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:15,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 129 transitions, 1309 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:15,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:15,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:15,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:15,857 INFO L124 PetriNetUnfolderBase]: 1177/2001 cut-off events. [2024-06-21 20:17:15,857 INFO L125 PetriNetUnfolderBase]: For 18973/18973 co-relation queries the response was YES. [2024-06-21 20:17:15,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10489 conditions, 2001 events. 1177/2001 cut-off events. For 18973/18973 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11090 event pairs, 330 based on Foata normal form. 4/2001 useless extension candidates. Maximal degree in co-relation 10444. Up to 1498 conditions per place. [2024-06-21 20:17:15,870 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 105 selfloop transitions, 52 changer transitions 0/166 dead transitions. [2024-06-21 20:17:15,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 166 transitions, 1911 flow [2024-06-21 20:17:15,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:15,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:15,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 170 transitions. [2024-06-21 20:17:15,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6746031746031746 [2024-06-21 20:17:15,872 INFO L175 Difference]: Start difference. First operand has 95 places, 129 transitions, 1309 flow. Second operand 6 states and 170 transitions. [2024-06-21 20:17:15,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 166 transitions, 1911 flow [2024-06-21 20:17:15,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 166 transitions, 1832 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-21 20:17:15,893 INFO L231 Difference]: Finished difference. Result has 100 places, 143 transitions, 1515 flow [2024-06-21 20:17:15,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1230, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1515, PETRI_PLACES=100, PETRI_TRANSITIONS=143} [2024-06-21 20:17:15,894 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 57 predicate places. [2024-06-21 20:17:15,894 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 143 transitions, 1515 flow [2024-06-21 20:17:15,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:15,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:15,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:15,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 20:17:15,895 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:15,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:15,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1925298202, now seen corresponding path program 3 times [2024-06-21 20:17:15,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:15,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176137842] [2024-06-21 20:17:15,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:15,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:15,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:15,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:15,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:15,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176137842] [2024-06-21 20:17:15,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176137842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:15,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:15,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:17:15,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301290432] [2024-06-21 20:17:15,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:15,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:17:15,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:15,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:17:15,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:17:15,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:15,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 143 transitions, 1515 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:15,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:15,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:15,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:16,175 INFO L124 PetriNetUnfolderBase]: 1168/1989 cut-off events. [2024-06-21 20:17:16,175 INFO L125 PetriNetUnfolderBase]: For 21139/21139 co-relation queries the response was YES. [2024-06-21 20:17:16,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10655 conditions, 1989 events. 1168/1989 cut-off events. For 21139/21139 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11024 event pairs, 330 based on Foata normal form. 4/1989 useless extension candidates. Maximal degree in co-relation 10607. Up to 1492 conditions per place. [2024-06-21 20:17:16,189 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 105 selfloop transitions, 51 changer transitions 0/165 dead transitions. [2024-06-21 20:17:16,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 165 transitions, 1959 flow [2024-06-21 20:17:16,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:16,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:16,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 168 transitions. [2024-06-21 20:17:16,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-21 20:17:16,190 INFO L175 Difference]: Start difference. First operand has 100 places, 143 transitions, 1515 flow. Second operand 6 states and 168 transitions. [2024-06-21 20:17:16,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 165 transitions, 1959 flow [2024-06-21 20:17:16,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 165 transitions, 1907 flow, removed 26 selfloop flow, removed 0 redundant places. [2024-06-21 20:17:16,218 INFO L231 Difference]: Finished difference. Result has 106 places, 143 transitions, 1576 flow [2024-06-21 20:17:16,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1463, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1576, PETRI_PLACES=106, PETRI_TRANSITIONS=143} [2024-06-21 20:17:16,219 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 63 predicate places. [2024-06-21 20:17:16,219 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 143 transitions, 1576 flow [2024-06-21 20:17:16,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:16,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:16,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:16,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 20:17:16,220 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:16,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:16,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1925309114, now seen corresponding path program 1 times [2024-06-21 20:17:16,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:16,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149641442] [2024-06-21 20:17:16,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:16,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:16,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:16,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:16,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:16,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149641442] [2024-06-21 20:17:16,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149641442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:16,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:16,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:17:16,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647171862] [2024-06-21 20:17:16,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:16,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:17:16,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:16,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:17:16,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:17:16,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:16,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 143 transitions, 1576 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:16,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:16,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:16,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:16,563 INFO L124 PetriNetUnfolderBase]: 1168/1989 cut-off events. [2024-06-21 20:17:16,564 INFO L125 PetriNetUnfolderBase]: For 23742/23742 co-relation queries the response was YES. [2024-06-21 20:17:16,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10997 conditions, 1989 events. 1168/1989 cut-off events. For 23742/23742 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 10959 event pairs, 314 based on Foata normal form. 6/1993 useless extension candidates. Maximal degree in co-relation 10946. Up to 1681 conditions per place. [2024-06-21 20:17:16,580 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 138 selfloop transitions, 20 changer transitions 0/167 dead transitions. [2024-06-21 20:17:16,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 167 transitions, 2020 flow [2024-06-21 20:17:16,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:16,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:16,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-21 20:17:16,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-06-21 20:17:16,581 INFO L175 Difference]: Start difference. First operand has 106 places, 143 transitions, 1576 flow. Second operand 6 states and 159 transitions. [2024-06-21 20:17:16,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 167 transitions, 2020 flow [2024-06-21 20:17:16,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 167 transitions, 1909 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 20:17:16,607 INFO L231 Difference]: Finished difference. Result has 108 places, 146 transitions, 1567 flow [2024-06-21 20:17:16,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1465, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1567, PETRI_PLACES=108, PETRI_TRANSITIONS=146} [2024-06-21 20:17:16,608 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2024-06-21 20:17:16,608 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 146 transitions, 1567 flow [2024-06-21 20:17:16,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:16,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:16,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:16,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 20:17:16,609 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:16,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:16,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1989073823, now seen corresponding path program 1 times [2024-06-21 20:17:16,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:16,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854286150] [2024-06-21 20:17:16,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:16,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:16,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:16,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:16,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:16,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854286150] [2024-06-21 20:17:16,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854286150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:16,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:16,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:17:16,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268377599] [2024-06-21 20:17:16,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:16,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:17:16,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:16,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:17:16,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:17:16,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:16,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 146 transitions, 1567 flow. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:16,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:16,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:16,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:16,960 INFO L124 PetriNetUnfolderBase]: 1160/1967 cut-off events. [2024-06-21 20:17:16,960 INFO L125 PetriNetUnfolderBase]: For 24840/24840 co-relation queries the response was YES. [2024-06-21 20:17:16,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10933 conditions, 1967 events. 1160/1967 cut-off events. For 24840/24840 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 10880 event pairs, 332 based on Foata normal form. 4/1962 useless extension candidates. Maximal degree in co-relation 10881. Up to 1613 conditions per place. [2024-06-21 20:17:16,974 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 118 selfloop transitions, 30 changer transitions 0/157 dead transitions. [2024-06-21 20:17:16,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 157 transitions, 1949 flow [2024-06-21 20:17:16,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:17:16,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:17:16,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-06-21 20:17:16,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-21 20:17:16,976 INFO L175 Difference]: Start difference. First operand has 108 places, 146 transitions, 1567 flow. Second operand 5 states and 133 transitions. [2024-06-21 20:17:16,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 157 transitions, 1949 flow [2024-06-21 20:17:17,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 157 transitions, 1871 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-21 20:17:17,002 INFO L231 Difference]: Finished difference. Result has 109 places, 146 transitions, 1558 flow [2024-06-21 20:17:17,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1489, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1558, PETRI_PLACES=109, PETRI_TRANSITIONS=146} [2024-06-21 20:17:17,003 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-21 20:17:17,003 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 146 transitions, 1558 flow [2024-06-21 20:17:17,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:17,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:17,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:17,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 20:17:17,004 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:17,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:17,004 INFO L85 PathProgramCache]: Analyzing trace with hash 563819642, now seen corresponding path program 1 times [2024-06-21 20:17:17,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:17,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168359130] [2024-06-21 20:17:17,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:17,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:17,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:17,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:17,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:17,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168359130] [2024-06-21 20:17:17,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168359130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:17,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:17,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:17:17,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702329049] [2024-06-21 20:17:17,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:17,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:17:17,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:17,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:17:17,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:17:17,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:17,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 146 transitions, 1558 flow. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:17,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:17,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:17,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:17,282 INFO L124 PetriNetUnfolderBase]: 1170/1993 cut-off events. [2024-06-21 20:17:17,282 INFO L125 PetriNetUnfolderBase]: For 26096/26096 co-relation queries the response was YES. [2024-06-21 20:17:17,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11176 conditions, 1993 events. 1170/1993 cut-off events. For 26096/26096 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 11000 event pairs, 322 based on Foata normal form. 2/1989 useless extension candidates. Maximal degree in co-relation 11123. Up to 1619 conditions per place. [2024-06-21 20:17:17,297 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 124 selfloop transitions, 34 changer transitions 0/167 dead transitions. [2024-06-21 20:17:17,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 167 transitions, 2054 flow [2024-06-21 20:17:17,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:17:17,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:17:17,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2024-06-21 20:17:17,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2024-06-21 20:17:17,298 INFO L175 Difference]: Start difference. First operand has 109 places, 146 transitions, 1558 flow. Second operand 5 states and 138 transitions. [2024-06-21 20:17:17,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 167 transitions, 2054 flow [2024-06-21 20:17:17,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 167 transitions, 1940 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 20:17:17,332 INFO L231 Difference]: Finished difference. Result has 108 places, 150 transitions, 1597 flow [2024-06-21 20:17:17,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1453, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1597, PETRI_PLACES=108, PETRI_TRANSITIONS=150} [2024-06-21 20:17:17,332 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2024-06-21 20:17:17,332 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 150 transitions, 1597 flow [2024-06-21 20:17:17,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:17,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:17,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:17,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 20:17:17,333 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:17,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:17,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1531731770, now seen corresponding path program 2 times [2024-06-21 20:17:17,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:17,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689247134] [2024-06-21 20:17:17,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:17,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:17,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:17,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:17,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:17,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689247134] [2024-06-21 20:17:17,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689247134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:17,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:17,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:17:17,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111997356] [2024-06-21 20:17:17,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:17,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:17:17,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:17,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:17:17,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:17:17,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:17,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 150 transitions, 1597 flow. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:17,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:17,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:17,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:17,642 INFO L124 PetriNetUnfolderBase]: 1142/1930 cut-off events. [2024-06-21 20:17:17,642 INFO L125 PetriNetUnfolderBase]: For 27273/27273 co-relation queries the response was YES. [2024-06-21 20:17:17,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10791 conditions, 1930 events. 1142/1930 cut-off events. For 27273/27273 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 10525 event pairs, 336 based on Foata normal form. 4/1925 useless extension candidates. Maximal degree in co-relation 10741. Up to 1589 conditions per place. [2024-06-21 20:17:17,657 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 118 selfloop transitions, 33 changer transitions 0/160 dead transitions. [2024-06-21 20:17:17,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 160 transitions, 1957 flow [2024-06-21 20:17:17,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:17:17,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:17:17,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-06-21 20:17:17,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-21 20:17:17,658 INFO L175 Difference]: Start difference. First operand has 108 places, 150 transitions, 1597 flow. Second operand 5 states and 132 transitions. [2024-06-21 20:17:17,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 160 transitions, 1957 flow [2024-06-21 20:17:17,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 160 transitions, 1898 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-21 20:17:17,691 INFO L231 Difference]: Finished difference. Result has 111 places, 150 transitions, 1613 flow [2024-06-21 20:17:17,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1538, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1613, PETRI_PLACES=111, PETRI_TRANSITIONS=150} [2024-06-21 20:17:17,692 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 68 predicate places. [2024-06-21 20:17:17,692 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 150 transitions, 1613 flow [2024-06-21 20:17:17,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:17,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:17,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:17,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 20:17:17,692 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:17,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:17,693 INFO L85 PathProgramCache]: Analyzing trace with hash -10456871, now seen corresponding path program 1 times [2024-06-21 20:17:17,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:17,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831094456] [2024-06-21 20:17:17,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:17,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:17,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:17,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:17,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:17,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831094456] [2024-06-21 20:17:17,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831094456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:17,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:17,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:17:17,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715849245] [2024-06-21 20:17:17,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:17,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:17:17,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:17,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:17:17,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:17:17,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:17,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 150 transitions, 1613 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:17,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:17,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:17,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:18,165 INFO L124 PetriNetUnfolderBase]: 1221/2074 cut-off events. [2024-06-21 20:17:18,166 INFO L125 PetriNetUnfolderBase]: For 31356/31356 co-relation queries the response was YES. [2024-06-21 20:17:18,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11669 conditions, 2074 events. 1221/2074 cut-off events. For 31356/31356 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11459 event pairs, 189 based on Foata normal form. 6/2078 useless extension candidates. Maximal degree in co-relation 11618. Up to 1650 conditions per place. [2024-06-21 20:17:18,183 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 163 selfloop transitions, 23 changer transitions 0/195 dead transitions. [2024-06-21 20:17:18,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 195 transitions, 2291 flow [2024-06-21 20:17:18,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:17:18,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:17:18,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-21 20:17:18,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-06-21 20:17:18,185 INFO L175 Difference]: Start difference. First operand has 111 places, 150 transitions, 1613 flow. Second operand 8 states and 212 transitions. [2024-06-21 20:17:18,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 195 transitions, 2291 flow [2024-06-21 20:17:18,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 195 transitions, 2169 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 20:17:18,227 INFO L231 Difference]: Finished difference. Result has 114 places, 156 transitions, 1646 flow [2024-06-21 20:17:18,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1491, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1646, PETRI_PLACES=114, PETRI_TRANSITIONS=156} [2024-06-21 20:17:18,227 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 71 predicate places. [2024-06-21 20:17:18,227 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 156 transitions, 1646 flow [2024-06-21 20:17:18,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:18,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:18,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:18,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 20:17:18,228 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:18,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:18,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1714077115, now seen corresponding path program 2 times [2024-06-21 20:17:18,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:18,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520307890] [2024-06-21 20:17:18,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:18,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:18,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:18,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:18,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:18,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520307890] [2024-06-21 20:17:18,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520307890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:18,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:18,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:17:18,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539004631] [2024-06-21 20:17:18,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:18,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:17:18,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:18,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:17:18,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:17:18,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:18,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 156 transitions, 1646 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:18,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:18,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:18,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:18,649 INFO L124 PetriNetUnfolderBase]: 1224/2073 cut-off events. [2024-06-21 20:17:18,649 INFO L125 PetriNetUnfolderBase]: For 33029/33029 co-relation queries the response was YES. [2024-06-21 20:17:18,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11983 conditions, 2073 events. 1224/2073 cut-off events. For 33029/33029 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11416 event pairs, 288 based on Foata normal form. 6/2077 useless extension candidates. Maximal degree in co-relation 11930. Up to 1754 conditions per place. [2024-06-21 20:17:18,666 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 161 selfloop transitions, 21 changer transitions 0/191 dead transitions. [2024-06-21 20:17:18,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 191 transitions, 2186 flow [2024-06-21 20:17:18,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:17:18,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:17:18,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-21 20:17:18,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6101190476190477 [2024-06-21 20:17:18,668 INFO L175 Difference]: Start difference. First operand has 114 places, 156 transitions, 1646 flow. Second operand 8 states and 205 transitions. [2024-06-21 20:17:18,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 191 transitions, 2186 flow [2024-06-21 20:17:18,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 191 transitions, 2086 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-21 20:17:18,713 INFO L231 Difference]: Finished difference. Result has 118 places, 159 transitions, 1660 flow [2024-06-21 20:17:18,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1562, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1660, PETRI_PLACES=118, PETRI_TRANSITIONS=159} [2024-06-21 20:17:18,713 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-21 20:17:18,713 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 159 transitions, 1660 flow [2024-06-21 20:17:18,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:18,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:18,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:18,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 20:17:18,714 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:18,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:18,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1716878585, now seen corresponding path program 1 times [2024-06-21 20:17:18,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:18,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810442383] [2024-06-21 20:17:18,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:18,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:18,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:18,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:18,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:18,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810442383] [2024-06-21 20:17:18,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810442383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:18,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:18,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:17:18,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953251721] [2024-06-21 20:17:18,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:18,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:17:18,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:18,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:17:18,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:17:18,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:18,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 159 transitions, 1660 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:18,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:18,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:18,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:19,110 INFO L124 PetriNetUnfolderBase]: 1250/2117 cut-off events. [2024-06-21 20:17:19,111 INFO L125 PetriNetUnfolderBase]: For 34891/34891 co-relation queries the response was YES. [2024-06-21 20:17:19,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12204 conditions, 2117 events. 1250/2117 cut-off events. For 34891/34891 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 11686 event pairs, 273 based on Foata normal form. 3/2118 useless extension candidates. Maximal degree in co-relation 12149. Up to 1797 conditions per place. [2024-06-21 20:17:19,126 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 164 selfloop transitions, 24 changer transitions 0/197 dead transitions. [2024-06-21 20:17:19,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 197 transitions, 2242 flow [2024-06-21 20:17:19,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:17:19,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:17:19,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-21 20:17:19,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6130952380952381 [2024-06-21 20:17:19,127 INFO L175 Difference]: Start difference. First operand has 118 places, 159 transitions, 1660 flow. Second operand 8 states and 206 transitions. [2024-06-21 20:17:19,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 197 transitions, 2242 flow [2024-06-21 20:17:19,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 197 transitions, 2174 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 20:17:19,175 INFO L231 Difference]: Finished difference. Result has 120 places, 166 transitions, 1745 flow [2024-06-21 20:17:19,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1592, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1745, PETRI_PLACES=120, PETRI_TRANSITIONS=166} [2024-06-21 20:17:19,176 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-21 20:17:19,176 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 166 transitions, 1745 flow [2024-06-21 20:17:19,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:19,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:19,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:19,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 20:17:19,176 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:19,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:19,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1997803929, now seen corresponding path program 3 times [2024-06-21 20:17:19,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:19,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575021233] [2024-06-21 20:17:19,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:19,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:19,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:19,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:19,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:19,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575021233] [2024-06-21 20:17:19,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575021233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:19,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:19,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:17:19,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125007239] [2024-06-21 20:17:19,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:19,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:17:19,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:19,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:17:19,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:17:19,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:19,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 166 transitions, 1745 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:19,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:19,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:19,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:19,580 INFO L124 PetriNetUnfolderBase]: 1303/2196 cut-off events. [2024-06-21 20:17:19,580 INFO L125 PetriNetUnfolderBase]: For 41822/41822 co-relation queries the response was YES. [2024-06-21 20:17:19,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12942 conditions, 2196 events. 1303/2196 cut-off events. For 41822/41822 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 12129 event pairs, 283 based on Foata normal form. 14/2202 useless extension candidates. Maximal degree in co-relation 12886. Up to 1640 conditions per place. [2024-06-21 20:17:19,597 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 128 selfloop transitions, 65 changer transitions 0/202 dead transitions. [2024-06-21 20:17:19,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 202 transitions, 2411 flow [2024-06-21 20:17:19,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:17:19,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:17:19,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-06-21 20:17:19,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6768707482993197 [2024-06-21 20:17:19,599 INFO L175 Difference]: Start difference. First operand has 120 places, 166 transitions, 1745 flow. Second operand 7 states and 199 transitions. [2024-06-21 20:17:19,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 202 transitions, 2411 flow [2024-06-21 20:17:19,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 202 transitions, 2329 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-21 20:17:19,638 INFO L231 Difference]: Finished difference. Result has 123 places, 169 transitions, 1870 flow [2024-06-21 20:17:19,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1663, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1870, PETRI_PLACES=123, PETRI_TRANSITIONS=169} [2024-06-21 20:17:19,639 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2024-06-21 20:17:19,639 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 169 transitions, 1870 flow [2024-06-21 20:17:19,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:19,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:19,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:19,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 20:17:19,640 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:19,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:19,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1997808889, now seen corresponding path program 2 times [2024-06-21 20:17:19,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:19,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600364723] [2024-06-21 20:17:19,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:19,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:19,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:19,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:19,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:19,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600364723] [2024-06-21 20:17:19,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600364723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:19,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:19,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:17:19,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187377235] [2024-06-21 20:17:19,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:19,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:17:19,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:19,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:17:19,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:17:19,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:19,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 169 transitions, 1870 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:19,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:19,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:19,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:20,005 INFO L124 PetriNetUnfolderBase]: 1380/2323 cut-off events. [2024-06-21 20:17:20,006 INFO L125 PetriNetUnfolderBase]: For 46034/46034 co-relation queries the response was YES. [2024-06-21 20:17:20,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14247 conditions, 2323 events. 1380/2323 cut-off events. For 46034/46034 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 13044 event pairs, 286 based on Foata normal form. 4/2314 useless extension candidates. Maximal degree in co-relation 14189. Up to 1530 conditions per place. [2024-06-21 20:17:20,031 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 115 selfloop transitions, 99 changer transitions 0/223 dead transitions. [2024-06-21 20:17:20,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 223 transitions, 2932 flow [2024-06-21 20:17:20,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:17:20,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:17:20,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-06-21 20:17:20,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6938775510204082 [2024-06-21 20:17:20,033 INFO L175 Difference]: Start difference. First operand has 123 places, 169 transitions, 1870 flow. Second operand 7 states and 204 transitions. [2024-06-21 20:17:20,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 223 transitions, 2932 flow [2024-06-21 20:17:20,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 223 transitions, 2765 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 20:17:20,093 INFO L231 Difference]: Finished difference. Result has 126 places, 190 transitions, 2207 flow [2024-06-21 20:17:20,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1703, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2207, PETRI_PLACES=126, PETRI_TRANSITIONS=190} [2024-06-21 20:17:20,094 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 83 predicate places. [2024-06-21 20:17:20,094 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 190 transitions, 2207 flow [2024-06-21 20:17:20,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:20,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:20,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:20,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 20:17:20,095 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:20,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:20,095 INFO L85 PathProgramCache]: Analyzing trace with hash 2004475129, now seen corresponding path program 3 times [2024-06-21 20:17:20,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:20,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054723657] [2024-06-21 20:17:20,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:20,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:20,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:20,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:20,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:20,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054723657] [2024-06-21 20:17:20,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054723657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:20,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:20,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:17:20,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974408237] [2024-06-21 20:17:20,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:20,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:17:20,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:20,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:17:20,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:17:20,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:20,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 190 transitions, 2207 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:20,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:20,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:20,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:20,486 INFO L124 PetriNetUnfolderBase]: 1369/2308 cut-off events. [2024-06-21 20:17:20,486 INFO L125 PetriNetUnfolderBase]: For 49740/49740 co-relation queries the response was YES. [2024-06-21 20:17:20,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14593 conditions, 2308 events. 1369/2308 cut-off events. For 49740/49740 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 12961 event pairs, 286 based on Foata normal form. 4/2299 useless extension candidates. Maximal degree in co-relation 14533. Up to 1521 conditions per place. [2024-06-21 20:17:20,502 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 112 selfloop transitions, 101 changer transitions 0/222 dead transitions. [2024-06-21 20:17:20,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 222 transitions, 2971 flow [2024-06-21 20:17:20,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:17:20,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:17:20,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-06-21 20:17:20,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6870748299319728 [2024-06-21 20:17:20,503 INFO L175 Difference]: Start difference. First operand has 126 places, 190 transitions, 2207 flow. Second operand 7 states and 202 transitions. [2024-06-21 20:17:20,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 222 transitions, 2971 flow [2024-06-21 20:17:20,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 222 transitions, 2827 flow, removed 72 selfloop flow, removed 0 redundant places. [2024-06-21 20:17:20,583 INFO L231 Difference]: Finished difference. Result has 133 places, 190 transitions, 2275 flow [2024-06-21 20:17:20,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2063, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2275, PETRI_PLACES=133, PETRI_TRANSITIONS=190} [2024-06-21 20:17:20,584 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 90 predicate places. [2024-06-21 20:17:20,584 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 190 transitions, 2275 flow [2024-06-21 20:17:20,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:20,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:20,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:20,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 20:17:20,585 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:20,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:20,585 INFO L85 PathProgramCache]: Analyzing trace with hash 2004484057, now seen corresponding path program 1 times [2024-06-21 20:17:20,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:20,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633555651] [2024-06-21 20:17:20,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:20,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:20,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:20,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:20,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:20,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633555651] [2024-06-21 20:17:20,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633555651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:20,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:20,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:17:20,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557535960] [2024-06-21 20:17:20,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:20,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:17:20,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:20,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:17:20,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:17:20,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:20,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 190 transitions, 2275 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:20,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:20,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:20,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:21,016 INFO L124 PetriNetUnfolderBase]: 1422/2390 cut-off events. [2024-06-21 20:17:21,017 INFO L125 PetriNetUnfolderBase]: For 58062/58062 co-relation queries the response was YES. [2024-06-21 20:17:21,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15385 conditions, 2390 events. 1422/2390 cut-off events. For 58062/58062 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 13485 event pairs, 296 based on Foata normal form. 14/2394 useless extension candidates. Maximal degree in co-relation 15322. Up to 1836 conditions per place. [2024-06-21 20:17:21,035 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 157 selfloop transitions, 59 changer transitions 0/225 dead transitions. [2024-06-21 20:17:21,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 225 transitions, 2965 flow [2024-06-21 20:17:21,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:17:21,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:17:21,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-06-21 20:17:21,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6700680272108843 [2024-06-21 20:17:21,037 INFO L175 Difference]: Start difference. First operand has 133 places, 190 transitions, 2275 flow. Second operand 7 states and 197 transitions. [2024-06-21 20:17:21,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 225 transitions, 2965 flow [2024-06-21 20:17:21,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 225 transitions, 2759 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 20:17:21,097 INFO L231 Difference]: Finished difference. Result has 135 places, 193 transitions, 2270 flow [2024-06-21 20:17:21,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2069, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2270, PETRI_PLACES=135, PETRI_TRANSITIONS=193} [2024-06-21 20:17:21,098 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 92 predicate places. [2024-06-21 20:17:21,098 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 193 transitions, 2270 flow [2024-06-21 20:17:21,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:21,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:21,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:21,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 20:17:21,099 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:21,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:21,099 INFO L85 PathProgramCache]: Analyzing trace with hash -682735781, now seen corresponding path program 4 times [2024-06-21 20:17:21,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:21,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183709172] [2024-06-21 20:17:21,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:21,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:21,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:21,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:21,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:21,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183709172] [2024-06-21 20:17:21,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183709172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:21,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:21,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:17:21,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402352069] [2024-06-21 20:17:21,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:21,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:17:21,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:21,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:17:21,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:17:21,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:21,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 193 transitions, 2270 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:21,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:21,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:21,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:21,519 INFO L124 PetriNetUnfolderBase]: 1460/2461 cut-off events. [2024-06-21 20:17:21,519 INFO L125 PetriNetUnfolderBase]: For 60412/60412 co-relation queries the response was YES. [2024-06-21 20:17:21,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15730 conditions, 2461 events. 1460/2461 cut-off events. For 60412/60412 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 13990 event pairs, 312 based on Foata normal form. 14/2469 useless extension candidates. Maximal degree in co-relation 15666. Up to 1866 conditions per place. [2024-06-21 20:17:21,539 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 155 selfloop transitions, 61 changer transitions 0/225 dead transitions. [2024-06-21 20:17:21,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 225 transitions, 2966 flow [2024-06-21 20:17:21,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:17:21,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:17:21,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-21 20:17:21,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6598639455782312 [2024-06-21 20:17:21,540 INFO L175 Difference]: Start difference. First operand has 135 places, 193 transitions, 2270 flow. Second operand 7 states and 194 transitions. [2024-06-21 20:17:21,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 225 transitions, 2966 flow [2024-06-21 20:17:21,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 225 transitions, 2807 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 20:17:21,607 INFO L231 Difference]: Finished difference. Result has 137 places, 196 transitions, 2326 flow [2024-06-21 20:17:21,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2111, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2326, PETRI_PLACES=137, PETRI_TRANSITIONS=196} [2024-06-21 20:17:21,608 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 94 predicate places. [2024-06-21 20:17:21,608 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 196 transitions, 2326 flow [2024-06-21 20:17:21,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:21,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:21,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:21,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 20:17:21,609 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:21,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:21,609 INFO L85 PathProgramCache]: Analyzing trace with hash -565996295, now seen corresponding path program 4 times [2024-06-21 20:17:21,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:21,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059831158] [2024-06-21 20:17:21,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:21,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:21,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:21,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:21,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:21,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059831158] [2024-06-21 20:17:21,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059831158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:21,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:21,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:17:21,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514027104] [2024-06-21 20:17:21,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:21,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:17:21,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:21,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:17:21,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:17:21,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:21,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 196 transitions, 2326 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:21,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:21,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:21,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:22,037 INFO L124 PetriNetUnfolderBase]: 1539/2597 cut-off events. [2024-06-21 20:17:22,037 INFO L125 PetriNetUnfolderBase]: For 64940/64940 co-relation queries the response was YES. [2024-06-21 20:17:22,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16838 conditions, 2597 events. 1539/2597 cut-off events. For 64940/64940 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 14979 event pairs, 320 based on Foata normal form. 4/2595 useless extension candidates. Maximal degree in co-relation 16773. Up to 1742 conditions per place. [2024-06-21 20:17:22,059 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 128 selfloop transitions, 106 changer transitions 0/243 dead transitions. [2024-06-21 20:17:22,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 243 transitions, 3460 flow [2024-06-21 20:17:22,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:17:22,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:17:22,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-06-21 20:17:22,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6836734693877551 [2024-06-21 20:17:22,060 INFO L175 Difference]: Start difference. First operand has 137 places, 196 transitions, 2326 flow. Second operand 7 states and 201 transitions. [2024-06-21 20:17:22,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 243 transitions, 3460 flow [2024-06-21 20:17:22,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 243 transitions, 3287 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-21 20:17:22,153 INFO L231 Difference]: Finished difference. Result has 139 places, 214 transitions, 2679 flow [2024-06-21 20:17:22,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2153, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2679, PETRI_PLACES=139, PETRI_TRANSITIONS=214} [2024-06-21 20:17:22,154 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-21 20:17:22,154 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 214 transitions, 2679 flow [2024-06-21 20:17:22,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:22,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:22,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:22,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 20:17:22,155 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:22,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:22,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1646958669, now seen corresponding path program 5 times [2024-06-21 20:17:22,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:22,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725441464] [2024-06-21 20:17:22,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:22,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:22,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:22,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:22,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:22,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725441464] [2024-06-21 20:17:22,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725441464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:22,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:22,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:17:22,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974376345] [2024-06-21 20:17:22,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:22,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:17:22,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:22,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:17:22,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:17:22,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:22,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 214 transitions, 2679 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:22,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:22,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:22,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:22,622 INFO L124 PetriNetUnfolderBase]: 1530/2585 cut-off events. [2024-06-21 20:17:22,623 INFO L125 PetriNetUnfolderBase]: For 66640/66640 co-relation queries the response was YES. [2024-06-21 20:17:22,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16850 conditions, 2585 events. 1530/2585 cut-off events. For 66640/66640 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 14891 event pairs, 320 based on Foata normal form. 4/2583 useless extension candidates. Maximal degree in co-relation 16784. Up to 1736 conditions per place. [2024-06-21 20:17:22,651 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 125 selfloop transitions, 107 changer transitions 0/241 dead transitions. [2024-06-21 20:17:22,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 241 transitions, 3417 flow [2024-06-21 20:17:22,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:17:22,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:17:22,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 198 transitions. [2024-06-21 20:17:22,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.673469387755102 [2024-06-21 20:17:22,653 INFO L175 Difference]: Start difference. First operand has 139 places, 214 transitions, 2679 flow. Second operand 7 states and 198 transitions. [2024-06-21 20:17:22,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 241 transitions, 3417 flow [2024-06-21 20:17:22,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 241 transitions, 3255 flow, removed 75 selfloop flow, removed 1 redundant places. [2024-06-21 20:17:22,749 INFO L231 Difference]: Finished difference. Result has 145 places, 214 transitions, 2741 flow [2024-06-21 20:17:22,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2517, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2741, PETRI_PLACES=145, PETRI_TRANSITIONS=214} [2024-06-21 20:17:22,749 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-21 20:17:22,750 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 214 transitions, 2741 flow [2024-06-21 20:17:22,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:22,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:22,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:22,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 20:17:22,750 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:22,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:22,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1772588459, now seen corresponding path program 6 times [2024-06-21 20:17:22,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:22,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349697140] [2024-06-21 20:17:22,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:22,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:22,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:22,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:22,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:22,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349697140] [2024-06-21 20:17:22,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349697140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:22,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:22,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:17:22,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460006157] [2024-06-21 20:17:22,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:22,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:17:22,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:22,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:17:22,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:17:22,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:22,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 214 transitions, 2741 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:22,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:22,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:22,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:23,191 INFO L124 PetriNetUnfolderBase]: 1521/2576 cut-off events. [2024-06-21 20:17:23,192 INFO L125 PetriNetUnfolderBase]: For 68643/68643 co-relation queries the response was YES. [2024-06-21 20:17:23,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17000 conditions, 2576 events. 1521/2576 cut-off events. For 68643/68643 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 14874 event pairs, 318 based on Foata normal form. 4/2574 useless extension candidates. Maximal degree in co-relation 16932. Up to 1730 conditions per place. [2024-06-21 20:17:23,216 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 125 selfloop transitions, 106 changer transitions 0/240 dead transitions. [2024-06-21 20:17:23,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 240 transitions, 3435 flow [2024-06-21 20:17:23,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:17:23,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:17:23,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-06-21 20:17:23,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-21 20:17:23,217 INFO L175 Difference]: Start difference. First operand has 145 places, 214 transitions, 2741 flow. Second operand 7 states and 196 transitions. [2024-06-21 20:17:23,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 240 transitions, 3435 flow [2024-06-21 20:17:23,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 240 transitions, 3138 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-21 20:17:23,319 INFO L231 Difference]: Finished difference. Result has 146 places, 214 transitions, 2666 flow [2024-06-21 20:17:23,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2444, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2666, PETRI_PLACES=146, PETRI_TRANSITIONS=214} [2024-06-21 20:17:23,320 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 103 predicate places. [2024-06-21 20:17:23,320 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 214 transitions, 2666 flow [2024-06-21 20:17:23,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:23,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:23,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:23,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 20:17:23,321 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:23,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:23,321 INFO L85 PathProgramCache]: Analyzing trace with hash -565987367, now seen corresponding path program 2 times [2024-06-21 20:17:23,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:23,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881401836] [2024-06-21 20:17:23,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:23,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:23,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:23,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:23,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:23,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881401836] [2024-06-21 20:17:23,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881401836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:23,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:23,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:17:23,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942419956] [2024-06-21 20:17:23,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:23,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:17:23,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:23,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:17:23,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:17:23,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:23,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 214 transitions, 2666 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:23,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:23,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:23,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:23,753 INFO L124 PetriNetUnfolderBase]: 1584/2678 cut-off events. [2024-06-21 20:17:23,753 INFO L125 PetriNetUnfolderBase]: For 77392/77392 co-relation queries the response was YES. [2024-06-21 20:17:23,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17416 conditions, 2678 events. 1584/2678 cut-off events. For 77392/77392 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 15465 event pairs, 314 based on Foata normal form. 14/2688 useless extension candidates. Maximal degree in co-relation 17348. Up to 2074 conditions per place. [2024-06-21 20:17:23,773 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 180 selfloop transitions, 57 changer transitions 0/246 dead transitions. [2024-06-21 20:17:23,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 246 transitions, 3418 flow [2024-06-21 20:17:23,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:17:23,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:17:23,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-06-21 20:17:23,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6632653061224489 [2024-06-21 20:17:23,774 INFO L175 Difference]: Start difference. First operand has 146 places, 214 transitions, 2666 flow. Second operand 7 states and 195 transitions. [2024-06-21 20:17:23,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 246 transitions, 3418 flow [2024-06-21 20:17:23,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 246 transitions, 3206 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 20:17:23,877 INFO L231 Difference]: Finished difference. Result has 147 places, 217 transitions, 2659 flow [2024-06-21 20:17:23,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2454, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2659, PETRI_PLACES=147, PETRI_TRANSITIONS=217} [2024-06-21 20:17:23,878 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 104 predicate places. [2024-06-21 20:17:23,878 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 217 transitions, 2659 flow [2024-06-21 20:17:23,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:23,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:23,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:23,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 20:17:23,878 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:23,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:23,879 INFO L85 PathProgramCache]: Analyzing trace with hash -919306279, now seen corresponding path program 3 times [2024-06-21 20:17:23,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:23,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131217363] [2024-06-21 20:17:23,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:23,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:23,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:23,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:23,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:23,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131217363] [2024-06-21 20:17:23,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131217363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:23,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:23,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:17:23,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975444880] [2024-06-21 20:17:23,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:23,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:17:23,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:23,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:17:23,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:17:23,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:23,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 217 transitions, 2659 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:23,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:23,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:23,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:24,327 INFO L124 PetriNetUnfolderBase]: 1647/2790 cut-off events. [2024-06-21 20:17:24,327 INFO L125 PetriNetUnfolderBase]: For 82484/82484 co-relation queries the response was YES. [2024-06-21 20:17:24,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18061 conditions, 2790 events. 1647/2790 cut-off events. For 82484/82484 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 16315 event pairs, 325 based on Foata normal form. 14/2800 useless extension candidates. Maximal degree in co-relation 17992. Up to 2175 conditions per place. [2024-06-21 20:17:24,349 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 185 selfloop transitions, 56 changer transitions 0/250 dead transitions. [2024-06-21 20:17:24,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 250 transitions, 3491 flow [2024-06-21 20:17:24,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:17:24,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:17:24,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-06-21 20:17:24,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6632653061224489 [2024-06-21 20:17:24,350 INFO L175 Difference]: Start difference. First operand has 147 places, 217 transitions, 2659 flow. Second operand 7 states and 195 transitions. [2024-06-21 20:17:24,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 250 transitions, 3491 flow [2024-06-21 20:17:24,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 250 transitions, 3328 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-21 20:17:24,443 INFO L231 Difference]: Finished difference. Result has 149 places, 220 transitions, 2705 flow [2024-06-21 20:17:24,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2496, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2705, PETRI_PLACES=149, PETRI_TRANSITIONS=220} [2024-06-21 20:17:24,444 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 106 predicate places. [2024-06-21 20:17:24,444 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 220 transitions, 2705 flow [2024-06-21 20:17:24,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:24,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:24,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:24,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 20:17:24,445 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:24,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:24,445 INFO L85 PathProgramCache]: Analyzing trace with hash -908830759, now seen corresponding path program 4 times [2024-06-21 20:17:24,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:24,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366725056] [2024-06-21 20:17:24,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:24,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:24,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:24,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:24,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:24,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366725056] [2024-06-21 20:17:24,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366725056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:24,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:24,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:17:24,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711296176] [2024-06-21 20:17:24,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:24,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:17:24,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:24,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:17:24,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:17:24,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:24,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 220 transitions, 2705 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:24,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:24,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:24,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:24,939 INFO L124 PetriNetUnfolderBase]: 1777/3028 cut-off events. [2024-06-21 20:17:24,939 INFO L125 PetriNetUnfolderBase]: For 94250/94250 co-relation queries the response was YES. [2024-06-21 20:17:24,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19590 conditions, 3028 events. 1777/3028 cut-off events. For 94250/94250 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 18172 event pairs, 320 based on Foata normal form. 14/3038 useless extension candidates. Maximal degree in co-relation 19520. Up to 2012 conditions per place. [2024-06-21 20:17:24,964 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 188 selfloop transitions, 63 changer transitions 0/260 dead transitions. [2024-06-21 20:17:24,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 260 transitions, 3681 flow [2024-06-21 20:17:24,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:17:24,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:17:24,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-06-21 20:17:24,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6768707482993197 [2024-06-21 20:17:24,965 INFO L175 Difference]: Start difference. First operand has 149 places, 220 transitions, 2705 flow. Second operand 7 states and 199 transitions. [2024-06-21 20:17:24,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 260 transitions, 3681 flow [2024-06-21 20:17:25,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 260 transitions, 3514 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-21 20:17:25,075 INFO L231 Difference]: Finished difference. Result has 152 places, 225 transitions, 2813 flow [2024-06-21 20:17:25,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2538, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2813, PETRI_PLACES=152, PETRI_TRANSITIONS=225} [2024-06-21 20:17:25,076 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 109 predicate places. [2024-06-21 20:17:25,076 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 225 transitions, 2813 flow [2024-06-21 20:17:25,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:25,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:25,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:25,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 20:17:25,076 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:25,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:25,077 INFO L85 PathProgramCache]: Analyzing trace with hash 239261120, now seen corresponding path program 1 times [2024-06-21 20:17:25,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:25,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825219191] [2024-06-21 20:17:25,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:25,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:25,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:25,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:25,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:25,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825219191] [2024-06-21 20:17:25,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825219191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:25,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:25,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:17:25,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063415816] [2024-06-21 20:17:25,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:25,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:17:25,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:25,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:17:25,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:17:25,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:25,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 225 transitions, 2813 flow. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:25,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:25,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:25,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:25,505 INFO L124 PetriNetUnfolderBase]: 1787/3047 cut-off events. [2024-06-21 20:17:25,505 INFO L125 PetriNetUnfolderBase]: For 93195/93195 co-relation queries the response was YES. [2024-06-21 20:17:25,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20247 conditions, 3047 events. 1787/3047 cut-off events. For 93195/93195 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 18332 event pairs, 377 based on Foata normal form. 2/3045 useless extension candidates. Maximal degree in co-relation 20175. Up to 2574 conditions per place. [2024-06-21 20:17:25,528 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 196 selfloop transitions, 37 changer transitions 0/242 dead transitions. [2024-06-21 20:17:25,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 242 transitions, 3447 flow [2024-06-21 20:17:25,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:17:25,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:17:25,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2024-06-21 20:17:25,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.638095238095238 [2024-06-21 20:17:25,529 INFO L175 Difference]: Start difference. First operand has 152 places, 225 transitions, 2813 flow. Second operand 5 states and 134 transitions. [2024-06-21 20:17:25,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 242 transitions, 3447 flow [2024-06-21 20:17:25,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 242 transitions, 3306 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-21 20:17:25,661 INFO L231 Difference]: Finished difference. Result has 154 places, 229 transitions, 2829 flow [2024-06-21 20:17:25,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2676, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2829, PETRI_PLACES=154, PETRI_TRANSITIONS=229} [2024-06-21 20:17:25,662 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-21 20:17:25,662 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 229 transitions, 2829 flow [2024-06-21 20:17:25,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:25,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:25,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:25,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 20:17:25,663 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:25,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:25,663 INFO L85 PathProgramCache]: Analyzing trace with hash 239528030, now seen corresponding path program 2 times [2024-06-21 20:17:25,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:25,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034550890] [2024-06-21 20:17:25,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:25,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:25,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:25,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:25,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:25,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034550890] [2024-06-21 20:17:25,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034550890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:25,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:25,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:17:25,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822698430] [2024-06-21 20:17:25,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:25,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:17:25,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:25,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:17:25,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:17:25,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:25,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 229 transitions, 2829 flow. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:25,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:25,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:25,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:26,078 INFO L124 PetriNetUnfolderBase]: 1751/2976 cut-off events. [2024-06-21 20:17:26,079 INFO L125 PetriNetUnfolderBase]: For 94048/94048 co-relation queries the response was YES. [2024-06-21 20:17:26,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19786 conditions, 2976 events. 1751/2976 cut-off events. For 94048/94048 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 17823 event pairs, 386 based on Foata normal form. 2/2969 useless extension candidates. Maximal degree in co-relation 19712. Up to 2518 conditions per place. [2024-06-21 20:17:26,106 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 195 selfloop transitions, 34 changer transitions 0/238 dead transitions. [2024-06-21 20:17:26,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 238 transitions, 3309 flow [2024-06-21 20:17:26,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:17:26,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:17:26,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-21 20:17:26,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-06-21 20:17:26,107 INFO L175 Difference]: Start difference. First operand has 154 places, 229 transitions, 2829 flow. Second operand 5 states and 129 transitions. [2024-06-21 20:17:26,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 238 transitions, 3309 flow [2024-06-21 20:17:26,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 238 transitions, 3257 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-21 20:17:26,236 INFO L231 Difference]: Finished difference. Result has 157 places, 229 transitions, 2852 flow [2024-06-21 20:17:26,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2777, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2852, PETRI_PLACES=157, PETRI_TRANSITIONS=229} [2024-06-21 20:17:26,237 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-21 20:17:26,237 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 229 transitions, 2852 flow [2024-06-21 20:17:26,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:26,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:26,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:26,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 20:17:26,238 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:26,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:26,238 INFO L85 PathProgramCache]: Analyzing trace with hash 239537950, now seen corresponding path program 1 times [2024-06-21 20:17:26,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:26,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594597209] [2024-06-21 20:17:26,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:26,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:26,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:26,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:26,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:26,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594597209] [2024-06-21 20:17:26,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594597209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:26,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:26,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:17:26,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033960890] [2024-06-21 20:17:26,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:26,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:17:26,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:26,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:17:26,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:17:26,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:26,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 229 transitions, 2852 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:26,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:26,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:26,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:26,671 INFO L124 PetriNetUnfolderBase]: 1770/2999 cut-off events. [2024-06-21 20:17:26,671 INFO L125 PetriNetUnfolderBase]: For 101681/101681 co-relation queries the response was YES. [2024-06-21 20:17:26,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20052 conditions, 2999 events. 1770/2999 cut-off events. For 101681/101681 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 17838 event pairs, 381 based on Foata normal form. 8/2998 useless extension candidates. Maximal degree in co-relation 19977. Up to 2523 conditions per place. [2024-06-21 20:17:26,696 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 194 selfloop transitions, 41 changer transitions 0/244 dead transitions. [2024-06-21 20:17:26,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 244 transitions, 3404 flow [2024-06-21 20:17:26,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:26,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:26,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-21 20:17:26,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-21 20:17:26,697 INFO L175 Difference]: Start difference. First operand has 157 places, 229 transitions, 2852 flow. Second operand 6 states and 153 transitions. [2024-06-21 20:17:26,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 244 transitions, 3404 flow [2024-06-21 20:17:26,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 244 transitions, 3268 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 20:17:26,856 INFO L231 Difference]: Finished difference. Result has 157 places, 233 transitions, 2869 flow [2024-06-21 20:17:26,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2716, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2869, PETRI_PLACES=157, PETRI_TRANSITIONS=233} [2024-06-21 20:17:26,856 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-21 20:17:26,856 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 233 transitions, 2869 flow [2024-06-21 20:17:26,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:26,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:26,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:26,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 20:17:26,857 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:26,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:26,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1876271683, now seen corresponding path program 1 times [2024-06-21 20:17:26,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:26,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398727686] [2024-06-21 20:17:26,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:26,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:26,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:26,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:26,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:26,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398727686] [2024-06-21 20:17:26,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398727686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:26,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:26,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:17:26,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829640893] [2024-06-21 20:17:26,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:26,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:17:26,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:26,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:17:26,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:17:26,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:26,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 233 transitions, 2869 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:26,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:26,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:26,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:27,380 INFO L124 PetriNetUnfolderBase]: 1757/2995 cut-off events. [2024-06-21 20:17:27,380 INFO L125 PetriNetUnfolderBase]: For 99917/99917 co-relation queries the response was YES. [2024-06-21 20:17:27,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20161 conditions, 2995 events. 1757/2995 cut-off events. For 99917/99917 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 17819 event pairs, 350 based on Foata normal form. 2/2995 useless extension candidates. Maximal degree in co-relation 20086. Up to 2597 conditions per place. [2024-06-21 20:17:27,407 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 232 selfloop transitions, 18 changer transitions 0/259 dead transitions. [2024-06-21 20:17:27,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 259 transitions, 3435 flow [2024-06-21 20:17:27,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:17:27,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:17:27,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-21 20:17:27,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-21 20:17:27,408 INFO L175 Difference]: Start difference. First operand has 157 places, 233 transitions, 2869 flow. Second operand 7 states and 179 transitions. [2024-06-21 20:17:27,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 259 transitions, 3435 flow [2024-06-21 20:17:27,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 259 transitions, 3302 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-21 20:17:27,531 INFO L231 Difference]: Finished difference. Result has 160 places, 233 transitions, 2780 flow [2024-06-21 20:17:27,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2736, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2780, PETRI_PLACES=160, PETRI_TRANSITIONS=233} [2024-06-21 20:17:27,532 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-21 20:17:27,532 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 233 transitions, 2780 flow [2024-06-21 20:17:27,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:27,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:27,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:27,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 20:17:27,533 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:27,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:27,533 INFO L85 PathProgramCache]: Analyzing trace with hash -61543689, now seen corresponding path program 2 times [2024-06-21 20:17:27,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:27,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872232122] [2024-06-21 20:17:27,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:27,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:27,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:27,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:27,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:27,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872232122] [2024-06-21 20:17:27,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872232122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:27,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:27,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:17:27,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191150800] [2024-06-21 20:17:27,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:27,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:17:27,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:27,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:17:27,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:17:27,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:27,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 233 transitions, 2780 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:27,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:27,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:27,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:28,002 INFO L124 PetriNetUnfolderBase]: 1775/3019 cut-off events. [2024-06-21 20:17:28,002 INFO L125 PetriNetUnfolderBase]: For 104874/104874 co-relation queries the response was YES. [2024-06-21 20:17:28,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20226 conditions, 3019 events. 1775/3019 cut-off events. For 104874/104874 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 17992 event pairs, 361 based on Foata normal form. 2/3011 useless extension candidates. Maximal degree in co-relation 20150. Up to 2407 conditions per place. [2024-06-21 20:17:28,029 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 178 selfloop transitions, 72 changer transitions 0/259 dead transitions. [2024-06-21 20:17:28,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 259 transitions, 3644 flow [2024-06-21 20:17:28,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:28,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:28,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-21 20:17:28,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6468253968253969 [2024-06-21 20:17:28,030 INFO L175 Difference]: Start difference. First operand has 160 places, 233 transitions, 2780 flow. Second operand 6 states and 163 transitions. [2024-06-21 20:17:28,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 259 transitions, 3644 flow [2024-06-21 20:17:28,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 259 transitions, 3608 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 20:17:28,157 INFO L231 Difference]: Finished difference. Result has 160 places, 240 transitions, 2999 flow [2024-06-21 20:17:28,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2744, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2999, PETRI_PLACES=160, PETRI_TRANSITIONS=240} [2024-06-21 20:17:28,158 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-21 20:17:28,158 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 240 transitions, 2999 flow [2024-06-21 20:17:28,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:28,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:28,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:28,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 20:17:28,159 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:28,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:28,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1179525671, now seen corresponding path program 3 times [2024-06-21 20:17:28,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:28,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571589592] [2024-06-21 20:17:28,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:28,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:28,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:28,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:28,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:28,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571589592] [2024-06-21 20:17:28,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571589592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:28,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:28,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:17:28,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113324725] [2024-06-21 20:17:28,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:28,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:17:28,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:28,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:17:28,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:17:28,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:28,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 240 transitions, 2999 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:28,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:28,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:28,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:28,637 INFO L124 PetriNetUnfolderBase]: 1763/2979 cut-off events. [2024-06-21 20:17:28,637 INFO L125 PetriNetUnfolderBase]: For 109935/109935 co-relation queries the response was YES. [2024-06-21 20:17:28,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20301 conditions, 2979 events. 1763/2979 cut-off events. For 109935/109935 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 17756 event pairs, 397 based on Foata normal form. 4/2969 useless extension candidates. Maximal degree in co-relation 20224. Up to 2399 conditions per place. [2024-06-21 20:17:28,662 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 178 selfloop transitions, 65 changer transitions 0/252 dead transitions. [2024-06-21 20:17:28,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 252 transitions, 3661 flow [2024-06-21 20:17:28,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:28,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:28,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-21 20:17:28,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.623015873015873 [2024-06-21 20:17:28,663 INFO L175 Difference]: Start difference. First operand has 160 places, 240 transitions, 2999 flow. Second operand 6 states and 157 transitions. [2024-06-21 20:17:28,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 252 transitions, 3661 flow [2024-06-21 20:17:28,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 252 transitions, 3559 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-21 20:17:28,828 INFO L231 Difference]: Finished difference. Result has 164 places, 240 transitions, 3035 flow [2024-06-21 20:17:28,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2897, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3035, PETRI_PLACES=164, PETRI_TRANSITIONS=240} [2024-06-21 20:17:28,829 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 121 predicate places. [2024-06-21 20:17:28,829 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 240 transitions, 3035 flow [2024-06-21 20:17:28,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:28,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:28,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:28,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 20:17:28,829 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:28,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:28,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1006188873, now seen corresponding path program 1 times [2024-06-21 20:17:28,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:28,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831380367] [2024-06-21 20:17:28,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:28,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:28,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:28,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:28,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:28,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831380367] [2024-06-21 20:17:28,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831380367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:28,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:28,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:17:28,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598064129] [2024-06-21 20:17:28,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:28,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:17:28,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:28,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:17:28,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:17:28,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:28,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 240 transitions, 3035 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:28,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:28,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:28,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:29,276 INFO L124 PetriNetUnfolderBase]: 1768/3013 cut-off events. [2024-06-21 20:17:29,276 INFO L125 PetriNetUnfolderBase]: For 111484/111484 co-relation queries the response was YES. [2024-06-21 20:17:29,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20520 conditions, 3013 events. 1768/3013 cut-off events. For 111484/111484 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 17976 event pairs, 349 based on Foata normal form. 1/3012 useless extension candidates. Maximal degree in co-relation 20442. Up to 2624 conditions per place. [2024-06-21 20:17:29,301 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 231 selfloop transitions, 20 changer transitions 0/260 dead transitions. [2024-06-21 20:17:29,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 260 transitions, 3691 flow [2024-06-21 20:17:29,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:29,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:29,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-21 20:17:29,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-21 20:17:29,303 INFO L175 Difference]: Start difference. First operand has 164 places, 240 transitions, 3035 flow. Second operand 6 states and 154 transitions. [2024-06-21 20:17:29,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 260 transitions, 3691 flow [2024-06-21 20:17:29,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 260 transitions, 3417 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-21 20:17:29,452 INFO L231 Difference]: Finished difference. Result has 162 places, 243 transitions, 2843 flow [2024-06-21 20:17:29,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2761, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2843, PETRI_PLACES=162, PETRI_TRANSITIONS=243} [2024-06-21 20:17:29,453 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 119 predicate places. [2024-06-21 20:17:29,453 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 243 transitions, 2843 flow [2024-06-21 20:17:29,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:29,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:29,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:29,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 20:17:29,453 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:29,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:29,454 INFO L85 PathProgramCache]: Analyzing trace with hash -994970397, now seen corresponding path program 2 times [2024-06-21 20:17:29,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:29,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711219407] [2024-06-21 20:17:29,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:29,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:29,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:29,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:29,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:29,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711219407] [2024-06-21 20:17:29,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711219407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:29,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:29,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:17:29,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270224356] [2024-06-21 20:17:29,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:29,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:17:29,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:29,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:17:29,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:17:29,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:29,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 243 transitions, 2843 flow. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:29,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:29,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:29,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:29,888 INFO L124 PetriNetUnfolderBase]: 1765/3001 cut-off events. [2024-06-21 20:17:29,888 INFO L125 PetriNetUnfolderBase]: For 113627/113627 co-relation queries the response was YES. [2024-06-21 20:17:29,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20188 conditions, 3001 events. 1765/3001 cut-off events. For 113627/113627 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 17855 event pairs, 356 based on Foata normal form. 1/2995 useless extension candidates. Maximal degree in co-relation 20112. Up to 2621 conditions per place. [2024-06-21 20:17:29,911 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 223 selfloop transitions, 20 changer transitions 0/252 dead transitions. [2024-06-21 20:17:29,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 252 transitions, 3351 flow [2024-06-21 20:17:29,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:17:29,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:17:29,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-21 20:17:29,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6047619047619047 [2024-06-21 20:17:29,912 INFO L175 Difference]: Start difference. First operand has 162 places, 243 transitions, 2843 flow. Second operand 5 states and 127 transitions. [2024-06-21 20:17:29,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 252 transitions, 3351 flow [2024-06-21 20:17:30,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 252 transitions, 3301 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 20:17:30,060 INFO L231 Difference]: Finished difference. Result has 163 places, 243 transitions, 2839 flow [2024-06-21 20:17:30,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2793, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2839, PETRI_PLACES=163, PETRI_TRANSITIONS=243} [2024-06-21 20:17:30,061 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 120 predicate places. [2024-06-21 20:17:30,061 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 243 transitions, 2839 flow [2024-06-21 20:17:30,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:30,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:30,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:30,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 20:17:30,061 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:30,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:30,062 INFO L85 PathProgramCache]: Analyzing trace with hash -2097402408, now seen corresponding path program 1 times [2024-06-21 20:17:30,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:30,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29651120] [2024-06-21 20:17:30,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:30,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:30,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:30,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:30,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:30,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29651120] [2024-06-21 20:17:30,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29651120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:30,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:30,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:17:30,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801179652] [2024-06-21 20:17:30,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:30,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:17:30,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:30,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:17:30,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:17:30,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:30,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 243 transitions, 2839 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:30,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:30,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:30,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:30,633 INFO L124 PetriNetUnfolderBase]: 1965/3334 cut-off events. [2024-06-21 20:17:30,633 INFO L125 PetriNetUnfolderBase]: For 153693/153693 co-relation queries the response was YES. [2024-06-21 20:17:30,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23539 conditions, 3334 events. 1965/3334 cut-off events. For 153693/153693 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 20347 event pairs, 312 based on Foata normal form. 18/3348 useless extension candidates. Maximal degree in co-relation 23462. Up to 2459 conditions per place. [2024-06-21 20:17:30,664 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 256 selfloop transitions, 30 changer transitions 0/295 dead transitions. [2024-06-21 20:17:30,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 295 transitions, 3927 flow [2024-06-21 20:17:30,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:17:30,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:17:30,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 241 transitions. [2024-06-21 20:17:30,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375661375661376 [2024-06-21 20:17:30,665 INFO L175 Difference]: Start difference. First operand has 163 places, 243 transitions, 2839 flow. Second operand 9 states and 241 transitions. [2024-06-21 20:17:30,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 295 transitions, 3927 flow [2024-06-21 20:17:30,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 295 transitions, 3871 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 20:17:30,815 INFO L231 Difference]: Finished difference. Result has 168 places, 246 transitions, 2966 flow [2024-06-21 20:17:30,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2783, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2966, PETRI_PLACES=168, PETRI_TRANSITIONS=246} [2024-06-21 20:17:30,816 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 125 predicate places. [2024-06-21 20:17:30,816 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 246 transitions, 2966 flow [2024-06-21 20:17:30,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:30,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:30,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:30,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 20:17:30,816 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:30,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:30,817 INFO L85 PathProgramCache]: Analyzing trace with hash 648136152, now seen corresponding path program 2 times [2024-06-21 20:17:30,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:30,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731338112] [2024-06-21 20:17:30,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:30,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:30,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:30,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:30,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:30,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731338112] [2024-06-21 20:17:30,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731338112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:30,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:30,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:17:30,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318233520] [2024-06-21 20:17:30,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:30,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:17:30,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:30,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:17:30,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:17:30,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:30,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 246 transitions, 2966 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:30,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:30,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:30,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:31,450 INFO L124 PetriNetUnfolderBase]: 2072/3529 cut-off events. [2024-06-21 20:17:31,450 INFO L125 PetriNetUnfolderBase]: For 173596/173596 co-relation queries the response was YES. [2024-06-21 20:17:31,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25626 conditions, 3529 events. 2072/3529 cut-off events. For 173596/173596 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 21760 event pairs, 424 based on Foata normal form. 18/3545 useless extension candidates. Maximal degree in co-relation 25549. Up to 2797 conditions per place. [2024-06-21 20:17:31,481 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 255 selfloop transitions, 30 changer transitions 0/294 dead transitions. [2024-06-21 20:17:31,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 294 transitions, 4056 flow [2024-06-21 20:17:31,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:17:31,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:17:31,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 237 transitions. [2024-06-21 20:17:31,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.626984126984127 [2024-06-21 20:17:31,482 INFO L175 Difference]: Start difference. First operand has 168 places, 246 transitions, 2966 flow. Second operand 9 states and 237 transitions. [2024-06-21 20:17:31,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 294 transitions, 4056 flow [2024-06-21 20:17:31,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 294 transitions, 3947 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-21 20:17:31,656 INFO L231 Difference]: Finished difference. Result has 172 places, 250 transitions, 3096 flow [2024-06-21 20:17:31,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2865, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3096, PETRI_PLACES=172, PETRI_TRANSITIONS=250} [2024-06-21 20:17:31,657 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 129 predicate places. [2024-06-21 20:17:31,657 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 250 transitions, 3096 flow [2024-06-21 20:17:31,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:31,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:31,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:31,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 20:17:31,658 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:31,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:31,658 INFO L85 PathProgramCache]: Analyzing trace with hash 652897752, now seen corresponding path program 3 times [2024-06-21 20:17:31,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:31,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107435916] [2024-06-21 20:17:31,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:31,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:31,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:31,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:31,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:31,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107435916] [2024-06-21 20:17:31,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107435916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:31,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:31,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:17:31,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23176248] [2024-06-21 20:17:31,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:31,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:17:31,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:31,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:17:31,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:17:31,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:31,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 250 transitions, 3096 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:31,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:31,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:31,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:32,284 INFO L124 PetriNetUnfolderBase]: 2026/3459 cut-off events. [2024-06-21 20:17:32,284 INFO L125 PetriNetUnfolderBase]: For 166748/166748 co-relation queries the response was YES. [2024-06-21 20:17:32,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24001 conditions, 3459 events. 2026/3459 cut-off events. For 166748/166748 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 21306 event pairs, 421 based on Foata normal form. 24/3481 useless extension candidates. Maximal degree in co-relation 23922. Up to 2898 conditions per place. [2024-06-21 20:17:32,318 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 254 selfloop transitions, 26 changer transitions 0/289 dead transitions. [2024-06-21 20:17:32,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 289 transitions, 3852 flow [2024-06-21 20:17:32,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:17:32,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:17:32,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-21 20:17:32,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6137566137566137 [2024-06-21 20:17:32,319 INFO L175 Difference]: Start difference. First operand has 172 places, 250 transitions, 3096 flow. Second operand 9 states and 232 transitions. [2024-06-21 20:17:32,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 289 transitions, 3852 flow [2024-06-21 20:17:32,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 289 transitions, 3698 flow, removed 62 selfloop flow, removed 5 redundant places. [2024-06-21 20:17:32,549 INFO L231 Difference]: Finished difference. Result has 176 places, 250 transitions, 3002 flow [2024-06-21 20:17:32,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2942, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3002, PETRI_PLACES=176, PETRI_TRANSITIONS=250} [2024-06-21 20:17:32,549 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-21 20:17:32,550 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 250 transitions, 3002 flow [2024-06-21 20:17:32,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:32,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:32,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:32,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 20:17:32,550 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:32,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:32,551 INFO L85 PathProgramCache]: Analyzing trace with hash 39338618, now seen corresponding path program 4 times [2024-06-21 20:17:32,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:32,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207032928] [2024-06-21 20:17:32,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:32,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:32,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:32,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:32,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:32,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207032928] [2024-06-21 20:17:32,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207032928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:32,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:32,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:17:32,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015646022] [2024-06-21 20:17:32,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:32,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:17:32,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:32,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:17:32,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:17:32,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:32,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 250 transitions, 3002 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:32,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:32,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:32,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:33,256 INFO L124 PetriNetUnfolderBase]: 2188/3721 cut-off events. [2024-06-21 20:17:33,257 INFO L125 PetriNetUnfolderBase]: For 201393/201393 co-relation queries the response was YES. [2024-06-21 20:17:33,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24929 conditions, 3721 events. 2188/3721 cut-off events. For 201393/201393 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 23156 event pairs, 472 based on Foata normal form. 50/3756 useless extension candidates. Maximal degree in co-relation 24848. Up to 2553 conditions per place. [2024-06-21 20:17:33,296 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 155 selfloop transitions, 124 changer transitions 3/291 dead transitions. [2024-06-21 20:17:33,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 291 transitions, 4028 flow [2024-06-21 20:17:33,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:17:33,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:17:33,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-06-21 20:17:33,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6815476190476191 [2024-06-21 20:17:33,298 INFO L175 Difference]: Start difference. First operand has 176 places, 250 transitions, 3002 flow. Second operand 8 states and 229 transitions. [2024-06-21 20:17:33,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 291 transitions, 4028 flow [2024-06-21 20:17:33,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 291 transitions, 3968 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 20:17:33,562 INFO L231 Difference]: Finished difference. Result has 176 places, 251 transitions, 3279 flow [2024-06-21 20:17:33,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2942, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3279, PETRI_PLACES=176, PETRI_TRANSITIONS=251} [2024-06-21 20:17:33,563 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-21 20:17:33,564 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 251 transitions, 3279 flow [2024-06-21 20:17:33,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:33,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:33,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:33,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 20:17:33,564 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:33,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:33,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1727387422, now seen corresponding path program 5 times [2024-06-21 20:17:33,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:33,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948521148] [2024-06-21 20:17:33,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:33,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:33,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:33,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:33,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:33,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948521148] [2024-06-21 20:17:33,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948521148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:33,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:33,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:17:33,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748499155] [2024-06-21 20:17:33,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:33,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:17:33,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:33,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:17:33,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:17:33,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:33,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 251 transitions, 3279 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:33,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:33,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:33,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:34,305 INFO L124 PetriNetUnfolderBase]: 2566/4373 cut-off events. [2024-06-21 20:17:34,306 INFO L125 PetriNetUnfolderBase]: For 264593/264593 co-relation queries the response was YES. [2024-06-21 20:17:34,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31152 conditions, 4373 events. 2566/4373 cut-off events. For 264593/264593 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 27960 event pairs, 585 based on Foata normal form. 42/4400 useless extension candidates. Maximal degree in co-relation 31070. Up to 2519 conditions per place. [2024-06-21 20:17:34,348 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 160 selfloop transitions, 129 changer transitions 4/302 dead transitions. [2024-06-21 20:17:34,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 302 transitions, 4619 flow [2024-06-21 20:17:34,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:17:34,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:17:34,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 235 transitions. [2024-06-21 20:17:34,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6994047619047619 [2024-06-21 20:17:34,349 INFO L175 Difference]: Start difference. First operand has 176 places, 251 transitions, 3279 flow. Second operand 8 states and 235 transitions. [2024-06-21 20:17:34,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 302 transitions, 4619 flow [2024-06-21 20:17:34,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 302 transitions, 4307 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-21 20:17:34,739 INFO L231 Difference]: Finished difference. Result has 178 places, 254 transitions, 3405 flow [2024-06-21 20:17:34,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2967, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3405, PETRI_PLACES=178, PETRI_TRANSITIONS=254} [2024-06-21 20:17:34,740 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-21 20:17:34,740 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 254 transitions, 3405 flow [2024-06-21 20:17:34,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:34,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:34,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:34,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 20:17:34,741 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:34,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:34,741 INFO L85 PathProgramCache]: Analyzing trace with hash 2129759308, now seen corresponding path program 6 times [2024-06-21 20:17:34,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:34,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051033049] [2024-06-21 20:17:34,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:34,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:34,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:34,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:34,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:34,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051033049] [2024-06-21 20:17:34,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051033049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:34,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:34,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:17:34,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970099914] [2024-06-21 20:17:34,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:34,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:17:34,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:34,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:17:34,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:17:34,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:34,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 254 transitions, 3405 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:34,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:34,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:34,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:35,423 INFO L124 PetriNetUnfolderBase]: 2439/4170 cut-off events. [2024-06-21 20:17:35,424 INFO L125 PetriNetUnfolderBase]: For 229539/229539 co-relation queries the response was YES. [2024-06-21 20:17:35,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27855 conditions, 4170 events. 2439/4170 cut-off events. For 229539/229539 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 26593 event pairs, 595 based on Foata normal form. 50/4205 useless extension candidates. Maximal degree in co-relation 27772. Up to 2982 conditions per place. [2024-06-21 20:17:35,462 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 158 selfloop transitions, 124 changer transitions 3/294 dead transitions. [2024-06-21 20:17:35,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 294 transitions, 4455 flow [2024-06-21 20:17:35,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:17:35,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:17:35,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-06-21 20:17:35,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6815476190476191 [2024-06-21 20:17:35,464 INFO L175 Difference]: Start difference. First operand has 178 places, 254 transitions, 3405 flow. Second operand 8 states and 229 transitions. [2024-06-21 20:17:35,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 294 transitions, 4455 flow [2024-06-21 20:17:35,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 294 transitions, 4071 flow, removed 72 selfloop flow, removed 5 redundant places. [2024-06-21 20:17:35,752 INFO L231 Difference]: Finished difference. Result has 181 places, 253 transitions, 3269 flow [2024-06-21 20:17:35,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3021, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3269, PETRI_PLACES=181, PETRI_TRANSITIONS=253} [2024-06-21 20:17:35,753 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 138 predicate places. [2024-06-21 20:17:35,753 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 253 transitions, 3269 flow [2024-06-21 20:17:35,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:35,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:35,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:35,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 20:17:35,754 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:35,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:35,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1975539020, now seen corresponding path program 1 times [2024-06-21 20:17:35,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:35,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186181018] [2024-06-21 20:17:35,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:35,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:35,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:35,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:35,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:35,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186181018] [2024-06-21 20:17:35,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186181018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:35,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:35,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:17:35,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431675468] [2024-06-21 20:17:35,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:35,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:17:35,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:35,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:17:35,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:17:35,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:35,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 253 transitions, 3269 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:35,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:35,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:35,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:36,518 INFO L124 PetriNetUnfolderBase]: 2731/4667 cut-off events. [2024-06-21 20:17:36,532 INFO L125 PetriNetUnfolderBase]: For 265050/265050 co-relation queries the response was YES. [2024-06-21 20:17:36,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31122 conditions, 4667 events. 2731/4667 cut-off events. For 265050/265050 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 30395 event pairs, 627 based on Foata normal form. 42/4691 useless extension candidates. Maximal degree in co-relation 31038. Up to 2561 conditions per place. [2024-06-21 20:17:36,594 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 158 selfloop transitions, 132 changer transitions 4/303 dead transitions. [2024-06-21 20:17:36,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 303 transitions, 4605 flow [2024-06-21 20:17:36,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:17:36,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:17:36,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 234 transitions. [2024-06-21 20:17:36,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6964285714285714 [2024-06-21 20:17:36,596 INFO L175 Difference]: Start difference. First operand has 181 places, 253 transitions, 3269 flow. Second operand 8 states and 234 transitions. [2024-06-21 20:17:36,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 303 transitions, 4605 flow [2024-06-21 20:17:37,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 303 transitions, 4299 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-21 20:17:37,030 INFO L231 Difference]: Finished difference. Result has 182 places, 255 transitions, 3358 flow [2024-06-21 20:17:37,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2975, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3358, PETRI_PLACES=182, PETRI_TRANSITIONS=255} [2024-06-21 20:17:37,031 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-21 20:17:37,031 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 255 transitions, 3358 flow [2024-06-21 20:17:37,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:37,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:37,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:37,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 20:17:37,032 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:37,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:37,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1570618147, now seen corresponding path program 1 times [2024-06-21 20:17:37,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:37,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151749188] [2024-06-21 20:17:37,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:37,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:37,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:37,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:37,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:37,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151749188] [2024-06-21 20:17:37,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151749188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:37,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:37,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:17:37,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069780860] [2024-06-21 20:17:37,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:37,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:17:37,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:37,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:17:37,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:17:37,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:37,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 255 transitions, 3358 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:37,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:37,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:37,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:37,696 INFO L124 PetriNetUnfolderBase]: 2719/4646 cut-off events. [2024-06-21 20:17:37,696 INFO L125 PetriNetUnfolderBase]: For 230863/230863 co-relation queries the response was YES. [2024-06-21 20:17:37,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30809 conditions, 4646 events. 2719/4646 cut-off events. For 230863/230863 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 30288 event pairs, 748 based on Foata normal form. 2/4642 useless extension candidates. Maximal degree in co-relation 30724. Up to 4084 conditions per place. [2024-06-21 20:17:37,742 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 212 selfloop transitions, 55 changer transitions 0/276 dead transitions. [2024-06-21 20:17:37,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 276 transitions, 4119 flow [2024-06-21 20:17:37,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:37,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:37,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-21 20:17:37,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-06-21 20:17:37,743 INFO L175 Difference]: Start difference. First operand has 182 places, 255 transitions, 3358 flow. Second operand 6 states and 159 transitions. [2024-06-21 20:17:37,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 276 transitions, 4119 flow [2024-06-21 20:17:38,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 276 transitions, 3859 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-21 20:17:38,083 INFO L231 Difference]: Finished difference. Result has 185 places, 262 transitions, 3367 flow [2024-06-21 20:17:38,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3102, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3367, PETRI_PLACES=185, PETRI_TRANSITIONS=262} [2024-06-21 20:17:38,083 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-21 20:17:38,083 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 262 transitions, 3367 flow [2024-06-21 20:17:38,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:38,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:38,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:38,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 20:17:38,084 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:38,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:38,084 INFO L85 PathProgramCache]: Analyzing trace with hash -865336095, now seen corresponding path program 2 times [2024-06-21 20:17:38,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:38,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314337686] [2024-06-21 20:17:38,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:38,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:38,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:38,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:38,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:38,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314337686] [2024-06-21 20:17:38,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314337686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:38,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:38,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:17:38,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14764308] [2024-06-21 20:17:38,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:38,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:17:38,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:38,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:17:38,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:17:38,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:38,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 262 transitions, 3367 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:38,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:38,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:38,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:38,721 INFO L124 PetriNetUnfolderBase]: 2737/4654 cut-off events. [2024-06-21 20:17:38,721 INFO L125 PetriNetUnfolderBase]: For 233643/233643 co-relation queries the response was YES. [2024-06-21 20:17:38,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30909 conditions, 4654 events. 2737/4654 cut-off events. For 233643/233643 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 30240 event pairs, 788 based on Foata normal form. 2/4642 useless extension candidates. Maximal degree in co-relation 30821. Up to 4004 conditions per place. [2024-06-21 20:17:38,850 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 195 selfloop transitions, 78 changer transitions 0/282 dead transitions. [2024-06-21 20:17:38,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 282 transitions, 4342 flow [2024-06-21 20:17:38,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:38,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:38,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-21 20:17:38,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.623015873015873 [2024-06-21 20:17:38,852 INFO L175 Difference]: Start difference. First operand has 185 places, 262 transitions, 3367 flow. Second operand 6 states and 157 transitions. [2024-06-21 20:17:38,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 282 transitions, 4342 flow [2024-06-21 20:17:39,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 282 transitions, 4244 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 20:17:39,281 INFO L231 Difference]: Finished difference. Result has 187 places, 269 transitions, 3550 flow [2024-06-21 20:17:39,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3275, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3550, PETRI_PLACES=187, PETRI_TRANSITIONS=269} [2024-06-21 20:17:39,281 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-21 20:17:39,281 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 269 transitions, 3550 flow [2024-06-21 20:17:39,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:39,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:39,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:39,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 20:17:39,282 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:39,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:39,282 INFO L85 PathProgramCache]: Analyzing trace with hash -864920385, now seen corresponding path program 3 times [2024-06-21 20:17:39,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:39,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925319949] [2024-06-21 20:17:39,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:39,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:39,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:39,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:39,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:39,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925319949] [2024-06-21 20:17:39,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925319949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:39,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:39,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:17:39,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996863010] [2024-06-21 20:17:39,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:39,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:17:39,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:39,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:17:39,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:17:39,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:39,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 269 transitions, 3550 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:39,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:39,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:39,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:39,903 INFO L124 PetriNetUnfolderBase]: 2731/4647 cut-off events. [2024-06-21 20:17:39,903 INFO L125 PetriNetUnfolderBase]: For 232301/232301 co-relation queries the response was YES. [2024-06-21 20:17:39,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30852 conditions, 4647 events. 2731/4647 cut-off events. For 232301/232301 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 30188 event pairs, 787 based on Foata normal form. 2/4635 useless extension candidates. Maximal degree in co-relation 30764. Up to 3999 conditions per place. [2024-06-21 20:17:39,947 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 191 selfloop transitions, 82 changer transitions 0/282 dead transitions. [2024-06-21 20:17:39,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 282 transitions, 4414 flow [2024-06-21 20:17:39,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:39,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:39,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-21 20:17:39,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.626984126984127 [2024-06-21 20:17:39,948 INFO L175 Difference]: Start difference. First operand has 187 places, 269 transitions, 3550 flow. Second operand 6 states and 158 transitions. [2024-06-21 20:17:39,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 282 transitions, 4414 flow [2024-06-21 20:17:40,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 282 transitions, 4256 flow, removed 29 selfloop flow, removed 2 redundant places. [2024-06-21 20:17:40,353 INFO L231 Difference]: Finished difference. Result has 191 places, 269 transitions, 3563 flow [2024-06-21 20:17:40,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3392, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3563, PETRI_PLACES=191, PETRI_TRANSITIONS=269} [2024-06-21 20:17:40,354 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-21 20:17:40,354 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 269 transitions, 3563 flow [2024-06-21 20:17:40,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:40,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:40,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:40,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 20:17:40,355 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:40,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:40,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1115459146, now seen corresponding path program 7 times [2024-06-21 20:17:40,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:40,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915390044] [2024-06-21 20:17:40,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:40,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:40,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:40,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:40,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:40,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915390044] [2024-06-21 20:17:40,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915390044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:40,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:40,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:17:40,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846605489] [2024-06-21 20:17:40,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:40,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:17:40,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:40,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:17:40,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:17:40,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:40,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 269 transitions, 3563 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:40,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:40,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:40,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:41,216 INFO L124 PetriNetUnfolderBase]: 2893/4948 cut-off events. [2024-06-21 20:17:41,216 INFO L125 PetriNetUnfolderBase]: For 301331/301331 co-relation queries the response was YES. [2024-06-21 20:17:41,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32560 conditions, 4948 events. 2893/4948 cut-off events. For 301331/301331 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 32664 event pairs, 831 based on Foata normal form. 50/4992 useless extension candidates. Maximal degree in co-relation 32471. Up to 3710 conditions per place. [2024-06-21 20:17:41,261 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 175 selfloop transitions, 119 changer transitions 3/306 dead transitions. [2024-06-21 20:17:41,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 306 transitions, 4551 flow [2024-06-21 20:17:41,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:17:41,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:17:41,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 225 transitions. [2024-06-21 20:17:41,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6696428571428571 [2024-06-21 20:17:41,263 INFO L175 Difference]: Start difference. First operand has 191 places, 269 transitions, 3563 flow. Second operand 8 states and 225 transitions. [2024-06-21 20:17:41,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 306 transitions, 4551 flow [2024-06-21 20:17:41,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 306 transitions, 4348 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 20:17:41,635 INFO L231 Difference]: Finished difference. Result has 194 places, 270 transitions, 3695 flow [2024-06-21 20:17:41,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3360, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3695, PETRI_PLACES=194, PETRI_TRANSITIONS=270} [2024-06-21 20:17:41,636 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-21 20:17:41,636 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 270 transitions, 3695 flow [2024-06-21 20:17:41,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:41,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:41,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:41,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 20:17:41,637 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:41,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:41,637 INFO L85 PathProgramCache]: Analyzing trace with hash -572863016, now seen corresponding path program 8 times [2024-06-21 20:17:41,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:41,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92247408] [2024-06-21 20:17:41,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:41,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:41,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:41,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:41,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:41,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92247408] [2024-06-21 20:17:41,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92247408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:41,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:41,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:17:41,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014883286] [2024-06-21 20:17:41,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:41,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:17:41,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:41,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:17:41,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:17:41,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:41,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 270 transitions, 3695 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:41,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:41,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:41,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:42,396 INFO L124 PetriNetUnfolderBase]: 3045/5214 cut-off events. [2024-06-21 20:17:42,397 INFO L125 PetriNetUnfolderBase]: For 323828/323828 co-relation queries the response was YES. [2024-06-21 20:17:42,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34550 conditions, 5214 events. 3045/5214 cut-off events. For 323828/323828 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 34734 event pairs, 886 based on Foata normal form. 50/5258 useless extension candidates. Maximal degree in co-relation 34460. Up to 3966 conditions per place. [2024-06-21 20:17:42,444 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 176 selfloop transitions, 119 changer transitions 3/307 dead transitions. [2024-06-21 20:17:42,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 307 transitions, 4693 flow [2024-06-21 20:17:42,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:17:42,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:17:42,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-06-21 20:17:42,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-21 20:17:42,445 INFO L175 Difference]: Start difference. First operand has 194 places, 270 transitions, 3695 flow. Second operand 8 states and 224 transitions. [2024-06-21 20:17:42,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 307 transitions, 4693 flow [2024-06-21 20:17:42,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 307 transitions, 4381 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-21 20:17:42,915 INFO L231 Difference]: Finished difference. Result has 196 places, 271 transitions, 3722 flow [2024-06-21 20:17:42,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3383, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3722, PETRI_PLACES=196, PETRI_TRANSITIONS=271} [2024-06-21 20:17:42,916 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 153 predicate places. [2024-06-21 20:17:42,916 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 271 transitions, 3722 flow [2024-06-21 20:17:42,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:42,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:42,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:42,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 20:17:42,917 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:42,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:42,917 INFO L85 PathProgramCache]: Analyzing trace with hash 771486218, now seen corresponding path program 9 times [2024-06-21 20:17:42,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:42,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798044553] [2024-06-21 20:17:42,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:42,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:42,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:43,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:43,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:43,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798044553] [2024-06-21 20:17:43,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798044553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:43,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:43,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:17:43,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101766879] [2024-06-21 20:17:43,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:43,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:17:43,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:43,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:17:43,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:17:43,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:43,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 271 transitions, 3722 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:43,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:43,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:43,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:43,798 INFO L124 PetriNetUnfolderBase]: 3398/5817 cut-off events. [2024-06-21 20:17:43,798 INFO L125 PetriNetUnfolderBase]: For 391484/391484 co-relation queries the response was YES. [2024-06-21 20:17:43,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39756 conditions, 5817 events. 3398/5817 cut-off events. For 391484/391484 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 39515 event pairs, 971 based on Foata normal form. 42/5853 useless extension candidates. Maximal degree in co-relation 39665. Up to 3646 conditions per place. [2024-06-21 20:17:43,855 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 179 selfloop transitions, 126 changer transitions 4/318 dead transitions. [2024-06-21 20:17:43,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 318 transitions, 5064 flow [2024-06-21 20:17:43,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:17:43,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:17:43,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 230 transitions. [2024-06-21 20:17:43,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6845238095238095 [2024-06-21 20:17:43,856 INFO L175 Difference]: Start difference. First operand has 196 places, 271 transitions, 3722 flow. Second operand 8 states and 230 transitions. [2024-06-21 20:17:43,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 318 transitions, 5064 flow [2024-06-21 20:17:44,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 318 transitions, 4748 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-21 20:17:44,497 INFO L231 Difference]: Finished difference. Result has 198 places, 274 transitions, 3861 flow [2024-06-21 20:17:44,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3406, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3861, PETRI_PLACES=198, PETRI_TRANSITIONS=274} [2024-06-21 20:17:44,498 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 155 predicate places. [2024-06-21 20:17:44,498 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 274 transitions, 3861 flow [2024-06-21 20:17:44,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:44,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:44,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:44,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 20:17:44,499 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:44,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:44,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1644488182, now seen corresponding path program 10 times [2024-06-21 20:17:44,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:44,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898131512] [2024-06-21 20:17:44,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:44,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:44,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:44,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:44,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:44,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898131512] [2024-06-21 20:17:44,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898131512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:44,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:44,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:17:44,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797051951] [2024-06-21 20:17:44,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:44,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:17:44,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:44,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:17:44,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:17:44,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:44,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 274 transitions, 3861 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:44,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:44,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:44,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:45,372 INFO L124 PetriNetUnfolderBase]: 3296/5663 cut-off events. [2024-06-21 20:17:45,372 INFO L125 PetriNetUnfolderBase]: For 343944/343944 co-relation queries the response was YES. [2024-06-21 20:17:45,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36245 conditions, 5663 events. 3296/5663 cut-off events. For 343944/343944 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 38404 event pairs, 1008 based on Foata normal form. 50/5707 useless extension candidates. Maximal degree in co-relation 36153. Up to 4353 conditions per place. [2024-06-21 20:17:45,422 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 183 selfloop transitions, 118 changer transitions 0/310 dead transitions. [2024-06-21 20:17:45,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 310 transitions, 4881 flow [2024-06-21 20:17:45,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:17:45,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:17:45,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-06-21 20:17:45,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-21 20:17:45,424 INFO L175 Difference]: Start difference. First operand has 198 places, 274 transitions, 3861 flow. Second operand 8 states and 224 transitions. [2024-06-21 20:17:45,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 310 transitions, 4881 flow [2024-06-21 20:17:46,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 310 transitions, 4558 flow, removed 82 selfloop flow, removed 4 redundant places. [2024-06-21 20:17:46,033 INFO L231 Difference]: Finished difference. Result has 202 places, 274 transitions, 3783 flow [2024-06-21 20:17:46,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3538, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3783, PETRI_PLACES=202, PETRI_TRANSITIONS=274} [2024-06-21 20:17:46,034 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 159 predicate places. [2024-06-21 20:17:46,034 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 274 transitions, 3783 flow [2024-06-21 20:17:46,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:46,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:46,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:46,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 20:17:46,035 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:46,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:46,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1398852310, now seen corresponding path program 2 times [2024-06-21 20:17:46,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:46,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939929140] [2024-06-21 20:17:46,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:46,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:46,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:46,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:46,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:46,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939929140] [2024-06-21 20:17:46,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939929140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:46,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:46,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:17:46,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576301643] [2024-06-21 20:17:46,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:46,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:17:46,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:46,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:17:46,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:17:46,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:46,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 274 transitions, 3783 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:46,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:46,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:46,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:46,998 INFO L124 PetriNetUnfolderBase]: 3425/5912 cut-off events. [2024-06-21 20:17:46,998 INFO L125 PetriNetUnfolderBase]: For 336010/336010 co-relation queries the response was YES. [2024-06-21 20:17:47,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37028 conditions, 5912 events. 3425/5912 cut-off events. For 336010/336010 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 40704 event pairs, 1010 based on Foata normal form. 42/5948 useless extension candidates. Maximal degree in co-relation 36934. Up to 4115 conditions per place. [2024-06-21 20:17:47,048 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 180 selfloop transitions, 122 changer transitions 6/317 dead transitions. [2024-06-21 20:17:47,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 317 transitions, 4853 flow [2024-06-21 20:17:47,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:17:47,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:17:47,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-06-21 20:17:47,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6815476190476191 [2024-06-21 20:17:47,049 INFO L175 Difference]: Start difference. First operand has 202 places, 274 transitions, 3783 flow. Second operand 8 states and 229 transitions. [2024-06-21 20:17:47,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 317 transitions, 4853 flow [2024-06-21 20:17:47,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 317 transitions, 4593 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 20:17:47,614 INFO L231 Difference]: Finished difference. Result has 203 places, 275 transitions, 3867 flow [2024-06-21 20:17:47,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3523, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3867, PETRI_PLACES=203, PETRI_TRANSITIONS=275} [2024-06-21 20:17:47,614 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-21 20:17:47,615 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 275 transitions, 3867 flow [2024-06-21 20:17:47,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:47,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:47,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:47,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 20:17:47,615 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:47,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:47,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1644242228, now seen corresponding path program 3 times [2024-06-21 20:17:47,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:47,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503242033] [2024-06-21 20:17:47,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:47,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:47,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:47,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:47,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:47,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503242033] [2024-06-21 20:17:47,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503242033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:47,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:47,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:17:47,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199008383] [2024-06-21 20:17:47,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:47,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:17:47,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:47,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:17:47,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:17:47,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:47,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 275 transitions, 3867 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:47,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:47,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:47,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:48,522 INFO L124 PetriNetUnfolderBase]: 3546/6157 cut-off events. [2024-06-21 20:17:48,522 INFO L125 PetriNetUnfolderBase]: For 356309/356309 co-relation queries the response was YES. [2024-06-21 20:17:48,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38454 conditions, 6157 events. 3546/6157 cut-off events. For 356309/356309 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 42874 event pairs, 1071 based on Foata normal form. 42/6193 useless extension candidates. Maximal degree in co-relation 38359. Up to 4444 conditions per place. [2024-06-21 20:17:48,582 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 189 selfloop transitions, 121 changer transitions 0/319 dead transitions. [2024-06-21 20:17:48,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 319 transitions, 5059 flow [2024-06-21 20:17:48,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:17:48,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:17:48,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-06-21 20:17:48,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6815476190476191 [2024-06-21 20:17:48,584 INFO L175 Difference]: Start difference. First operand has 203 places, 275 transitions, 3867 flow. Second operand 8 states and 229 transitions. [2024-06-21 20:17:48,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 319 transitions, 5059 flow [2024-06-21 20:17:49,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 319 transitions, 4724 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-21 20:17:49,346 INFO L231 Difference]: Finished difference. Result has 205 places, 277 transitions, 3895 flow [2024-06-21 20:17:49,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3532, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3895, PETRI_PLACES=205, PETRI_TRANSITIONS=277} [2024-06-21 20:17:49,346 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 162 predicate places. [2024-06-21 20:17:49,346 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 277 transitions, 3895 flow [2024-06-21 20:17:49,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:49,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:49,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:49,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 20:17:49,347 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:49,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:49,347 INFO L85 PathProgramCache]: Analyzing trace with hash -158870230, now seen corresponding path program 4 times [2024-06-21 20:17:49,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:49,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750558978] [2024-06-21 20:17:49,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:49,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:49,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:49,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:49,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:49,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750558978] [2024-06-21 20:17:49,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750558978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:49,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:49,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:17:49,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032488486] [2024-06-21 20:17:49,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:49,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:17:49,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:49,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:17:49,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:17:49,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:49,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 277 transitions, 3895 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:49,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:49,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:49,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:50,444 INFO L124 PetriNetUnfolderBase]: 3763/6553 cut-off events. [2024-06-21 20:17:50,444 INFO L125 PetriNetUnfolderBase]: For 391983/391983 co-relation queries the response was YES. [2024-06-21 20:17:50,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40338 conditions, 6553 events. 3763/6553 cut-off events. For 391983/391983 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 46455 event pairs, 1104 based on Foata normal form. 42/6589 useless extension candidates. Maximal degree in co-relation 40242. Up to 3049 conditions per place. [2024-06-21 20:17:50,509 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 185 selfloop transitions, 130 changer transitions 0/324 dead transitions. [2024-06-21 20:17:50,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 324 transitions, 5091 flow [2024-06-21 20:17:50,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:17:50,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:17:50,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 231 transitions. [2024-06-21 20:17:50,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6875 [2024-06-21 20:17:50,511 INFO L175 Difference]: Start difference. First operand has 205 places, 277 transitions, 3895 flow. Second operand 8 states and 231 transitions. [2024-06-21 20:17:50,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 324 transitions, 5091 flow [2024-06-21 20:17:51,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 324 transitions, 4758 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-21 20:17:51,128 INFO L231 Difference]: Finished difference. Result has 206 places, 277 transitions, 3793 flow [2024-06-21 20:17:51,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3478, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3793, PETRI_PLACES=206, PETRI_TRANSITIONS=277} [2024-06-21 20:17:51,128 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 163 predicate places. [2024-06-21 20:17:51,128 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 277 transitions, 3793 flow [2024-06-21 20:17:51,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:51,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:51,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:51,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 20:17:51,129 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:51,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:51,129 INFO L85 PathProgramCache]: Analyzing trace with hash 2099085123, now seen corresponding path program 1 times [2024-06-21 20:17:51,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:51,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096587861] [2024-06-21 20:17:51,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:51,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:51,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:51,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:51,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:51,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096587861] [2024-06-21 20:17:51,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096587861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:51,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:51,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:17:51,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622215794] [2024-06-21 20:17:51,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:51,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:17:51,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:51,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:17:51,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:17:51,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:51,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 277 transitions, 3793 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:51,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:51,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:51,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:52,107 INFO L124 PetriNetUnfolderBase]: 3779/6571 cut-off events. [2024-06-21 20:17:52,107 INFO L125 PetriNetUnfolderBase]: For 341834/341834 co-relation queries the response was YES. [2024-06-21 20:17:52,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40366 conditions, 6571 events. 3779/6571 cut-off events. For 341834/341834 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 46625 event pairs, 1308 based on Foata normal form. 4/6566 useless extension candidates. Maximal degree in co-relation 40269. Up to 5930 conditions per place. [2024-06-21 20:17:52,169 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 243 selfloop transitions, 39 changer transitions 0/291 dead transitions. [2024-06-21 20:17:52,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 291 transitions, 4431 flow [2024-06-21 20:17:52,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:52,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:52,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-21 20:17:52,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5992063492063492 [2024-06-21 20:17:52,185 INFO L175 Difference]: Start difference. First operand has 206 places, 277 transitions, 3793 flow. Second operand 6 states and 151 transitions. [2024-06-21 20:17:52,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 291 transitions, 4431 flow [2024-06-21 20:17:52,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 291 transitions, 4076 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-21 20:17:52,777 INFO L231 Difference]: Finished difference. Result has 206 places, 280 transitions, 3576 flow [2024-06-21 20:17:52,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3438, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3576, PETRI_PLACES=206, PETRI_TRANSITIONS=280} [2024-06-21 20:17:52,778 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 163 predicate places. [2024-06-21 20:17:52,778 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 280 transitions, 3576 flow [2024-06-21 20:17:52,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:52,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:52,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:52,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 20:17:52,779 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:52,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:52,779 INFO L85 PathProgramCache]: Analyzing trace with hash 616383391, now seen corresponding path program 2 times [2024-06-21 20:17:52,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:52,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114648365] [2024-06-21 20:17:52,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:52,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:52,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:52,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:52,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:52,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114648365] [2024-06-21 20:17:52,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114648365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:52,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:52,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:17:52,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393346493] [2024-06-21 20:17:52,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:52,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:17:52,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:52,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:17:52,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:17:52,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:52,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 280 transitions, 3576 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:52,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:52,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:52,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:53,614 INFO L124 PetriNetUnfolderBase]: 3655/6361 cut-off events. [2024-06-21 20:17:53,614 INFO L125 PetriNetUnfolderBase]: For 295688/295688 co-relation queries the response was YES. [2024-06-21 20:17:53,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37323 conditions, 6361 events. 3655/6361 cut-off events. For 295688/295688 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 44811 event pairs, 1215 based on Foata normal form. 4/6356 useless extension candidates. Maximal degree in co-relation 37225. Up to 5690 conditions per place. [2024-06-21 20:17:53,674 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 243 selfloop transitions, 43 changer transitions 0/295 dead transitions. [2024-06-21 20:17:53,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 295 transitions, 4230 flow [2024-06-21 20:17:53,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:53,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:53,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-21 20:17:53,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5992063492063492 [2024-06-21 20:17:53,676 INFO L175 Difference]: Start difference. First operand has 206 places, 280 transitions, 3576 flow. Second operand 6 states and 151 transitions. [2024-06-21 20:17:53,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 295 transitions, 4230 flow [2024-06-21 20:17:54,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 295 transitions, 4114 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-21 20:17:54,366 INFO L231 Difference]: Finished difference. Result has 208 places, 283 transitions, 3612 flow [2024-06-21 20:17:54,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3460, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3612, PETRI_PLACES=208, PETRI_TRANSITIONS=283} [2024-06-21 20:17:54,367 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 165 predicate places. [2024-06-21 20:17:54,367 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 283 transitions, 3612 flow [2024-06-21 20:17:54,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:54,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:54,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:54,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 20:17:54,367 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:54,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:54,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1127082749, now seen corresponding path program 1 times [2024-06-21 20:17:54,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:54,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737510526] [2024-06-21 20:17:54,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:54,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:54,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:54,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:54,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:54,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737510526] [2024-06-21 20:17:54,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737510526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:54,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:54,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:17:54,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648015689] [2024-06-21 20:17:54,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:54,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:17:54,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:54,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:17:54,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:17:54,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:54,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 283 transitions, 3612 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:54,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:54,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:54,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:55,274 INFO L124 PetriNetUnfolderBase]: 3683/6422 cut-off events. [2024-06-21 20:17:55,275 INFO L125 PetriNetUnfolderBase]: For 304908/304908 co-relation queries the response was YES. [2024-06-21 20:17:55,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37957 conditions, 6422 events. 3683/6422 cut-off events. For 304908/304908 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 45217 event pairs, 1206 based on Foata normal form. 2/6420 useless extension candidates. Maximal degree in co-relation 37858. Up to 5648 conditions per place. [2024-06-21 20:17:55,336 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 241 selfloop transitions, 61 changer transitions 0/311 dead transitions. [2024-06-21 20:17:55,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 311 transitions, 4719 flow [2024-06-21 20:17:55,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:17:55,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:17:55,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-21 20:17:55,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-06-21 20:17:55,338 INFO L175 Difference]: Start difference. First operand has 208 places, 283 transitions, 3612 flow. Second operand 7 states and 184 transitions. [2024-06-21 20:17:55,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 311 transitions, 4719 flow [2024-06-21 20:17:55,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 311 transitions, 4589 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-21 20:17:55,941 INFO L231 Difference]: Finished difference. Result has 212 places, 291 transitions, 3734 flow [2024-06-21 20:17:55,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3482, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3734, PETRI_PLACES=212, PETRI_TRANSITIONS=291} [2024-06-21 20:17:55,941 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 169 predicate places. [2024-06-21 20:17:55,941 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 291 transitions, 3734 flow [2024-06-21 20:17:55,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:55,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:55,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:55,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 20:17:55,942 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:55,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:55,942 INFO L85 PathProgramCache]: Analyzing trace with hash -933213391, now seen corresponding path program 2 times [2024-06-21 20:17:55,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:55,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223271624] [2024-06-21 20:17:55,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:55,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:55,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:56,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:56,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:56,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223271624] [2024-06-21 20:17:56,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223271624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:56,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:56,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:17:56,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143213990] [2024-06-21 20:17:56,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:56,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:17:56,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:56,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:17:56,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:17:56,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:56,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 291 transitions, 3734 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:56,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:56,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:56,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:56,789 INFO L124 PetriNetUnfolderBase]: 3693/6414 cut-off events. [2024-06-21 20:17:56,789 INFO L125 PetriNetUnfolderBase]: For 315485/315485 co-relation queries the response was YES. [2024-06-21 20:17:56,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38241 conditions, 6414 events. 3693/6414 cut-off events. For 315485/315485 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 45099 event pairs, 1235 based on Foata normal form. 2/6400 useless extension candidates. Maximal degree in co-relation 38140. Up to 5658 conditions per place. [2024-06-21 20:17:56,960 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 231 selfloop transitions, 68 changer transitions 0/308 dead transitions. [2024-06-21 20:17:56,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 308 transitions, 4782 flow [2024-06-21 20:17:56,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:56,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:56,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-21 20:17:56,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.623015873015873 [2024-06-21 20:17:56,962 INFO L175 Difference]: Start difference. First operand has 212 places, 291 transitions, 3734 flow. Second operand 6 states and 157 transitions. [2024-06-21 20:17:56,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 308 transitions, 4782 flow [2024-06-21 20:17:57,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 308 transitions, 4667 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 20:17:57,600 INFO L231 Difference]: Finished difference. Result has 215 places, 295 transitions, 3828 flow [2024-06-21 20:17:57,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3622, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3828, PETRI_PLACES=215, PETRI_TRANSITIONS=295} [2024-06-21 20:17:57,601 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 172 predicate places. [2024-06-21 20:17:57,601 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 295 transitions, 3828 flow [2024-06-21 20:17:57,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:57,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:57,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:57,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 20:17:57,601 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:57,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:57,602 INFO L85 PathProgramCache]: Analyzing trace with hash -36159865, now seen corresponding path program 3 times [2024-06-21 20:17:57,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:57,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331481060] [2024-06-21 20:17:57,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:57,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:57,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:57,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:57,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:57,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331481060] [2024-06-21 20:17:57,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331481060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:57,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:57,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:17:57,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649970660] [2024-06-21 20:17:57,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:57,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:17:57,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:57,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:17:57,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:17:57,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:57,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 295 transitions, 3828 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:57,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:57,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:57,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:17:58,435 INFO L124 PetriNetUnfolderBase]: 3689/6410 cut-off events. [2024-06-21 20:17:58,435 INFO L125 PetriNetUnfolderBase]: For 321728/321728 co-relation queries the response was YES. [2024-06-21 20:17:58,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38221 conditions, 6410 events. 3689/6410 cut-off events. For 321728/321728 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 45123 event pairs, 1235 based on Foata normal form. 2/6396 useless extension candidates. Maximal degree in co-relation 38118. Up to 5656 conditions per place. [2024-06-21 20:17:58,510 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 236 selfloop transitions, 63 changer transitions 0/308 dead transitions. [2024-06-21 20:17:58,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 308 transitions, 4816 flow [2024-06-21 20:17:58,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:17:58,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:17:58,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-21 20:17:58,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-21 20:17:58,512 INFO L175 Difference]: Start difference. First operand has 215 places, 295 transitions, 3828 flow. Second operand 6 states and 156 transitions. [2024-06-21 20:17:58,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 308 transitions, 4816 flow [2024-06-21 20:17:59,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 308 transitions, 4640 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 20:17:59,276 INFO L231 Difference]: Finished difference. Result has 217 places, 295 transitions, 3786 flow [2024-06-21 20:17:59,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3652, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3786, PETRI_PLACES=217, PETRI_TRANSITIONS=295} [2024-06-21 20:17:59,277 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 174 predicate places. [2024-06-21 20:17:59,277 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 295 transitions, 3786 flow [2024-06-21 20:17:59,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:59,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:17:59,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:17:59,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 20:17:59,277 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:17:59,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:17:59,278 INFO L85 PathProgramCache]: Analyzing trace with hash 946483229, now seen corresponding path program 4 times [2024-06-21 20:17:59,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:17:59,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204352957] [2024-06-21 20:17:59,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:17:59,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:17:59,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:17:59,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:17:59,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:17:59,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204352957] [2024-06-21 20:17:59,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204352957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:17:59,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:17:59,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:17:59,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230444121] [2024-06-21 20:17:59,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:17:59,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:17:59,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:17:59,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:17:59,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:17:59,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:17:59,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 295 transitions, 3786 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:17:59,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:17:59,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:17:59,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:00,152 INFO L124 PetriNetUnfolderBase]: 3699/6450 cut-off events. [2024-06-21 20:18:00,153 INFO L125 PetriNetUnfolderBase]: For 330373/330373 co-relation queries the response was YES. [2024-06-21 20:18:00,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38425 conditions, 6450 events. 3699/6450 cut-off events. For 330373/330373 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 45524 event pairs, 1215 based on Foata normal form. 2/6448 useless extension candidates. Maximal degree in co-relation 38323. Up to 5666 conditions per place. [2024-06-21 20:18:00,212 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 239 selfloop transitions, 68 changer transitions 1/317 dead transitions. [2024-06-21 20:18:00,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 317 transitions, 4755 flow [2024-06-21 20:18:00,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:18:00,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:18:00,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-21 20:18:00,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2024-06-21 20:18:00,214 INFO L175 Difference]: Start difference. First operand has 217 places, 295 transitions, 3786 flow. Second operand 6 states and 161 transitions. [2024-06-21 20:18:00,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 317 transitions, 4755 flow [2024-06-21 20:18:00,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 317 transitions, 4542 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 20:18:00,826 INFO L231 Difference]: Finished difference. Result has 216 places, 298 transitions, 3768 flow [2024-06-21 20:18:00,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3579, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3768, PETRI_PLACES=216, PETRI_TRANSITIONS=298} [2024-06-21 20:18:00,842 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-21 20:18:00,842 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 298 transitions, 3768 flow [2024-06-21 20:18:00,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:00,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:00,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:00,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 20:18:00,843 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:18:00,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:00,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1741764323, now seen corresponding path program 5 times [2024-06-21 20:18:00,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:00,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468001261] [2024-06-21 20:18:00,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:00,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:00,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:00,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:18:00,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:00,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468001261] [2024-06-21 20:18:00,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468001261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:00,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:00,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:18:00,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145955865] [2024-06-21 20:18:00,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:00,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:18:00,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:00,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:18:00,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:18:00,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:18:00,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 298 transitions, 3768 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:00,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:00,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:18:00,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:01,703 INFO L124 PetriNetUnfolderBase]: 3707/6453 cut-off events. [2024-06-21 20:18:01,703 INFO L125 PetriNetUnfolderBase]: For 340385/340385 co-relation queries the response was YES. [2024-06-21 20:18:01,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38575 conditions, 6453 events. 3707/6453 cut-off events. For 340385/340385 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 45567 event pairs, 1245 based on Foata normal form. 2/6442 useless extension candidates. Maximal degree in co-relation 38475. Up to 5676 conditions per place. [2024-06-21 20:18:01,770 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 232 selfloop transitions, 72 changer transitions 1/314 dead transitions. [2024-06-21 20:18:01,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 314 transitions, 4721 flow [2024-06-21 20:18:01,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:18:01,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:18:01,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-21 20:18:01,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-21 20:18:01,773 INFO L175 Difference]: Start difference. First operand has 216 places, 298 transitions, 3768 flow. Second operand 6 states and 153 transitions. [2024-06-21 20:18:01,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 314 transitions, 4721 flow [2024-06-21 20:18:02,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 314 transitions, 4611 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-21 20:18:02,481 INFO L231 Difference]: Finished difference. Result has 219 places, 301 transitions, 3856 flow [2024-06-21 20:18:02,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3661, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3856, PETRI_PLACES=219, PETRI_TRANSITIONS=301} [2024-06-21 20:18:02,483 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-21 20:18:02,483 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 301 transitions, 3856 flow [2024-06-21 20:18:02,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:02,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:02,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:02,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 20:18:02,484 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:18:02,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:02,484 INFO L85 PathProgramCache]: Analyzing trace with hash -285272941, now seen corresponding path program 6 times [2024-06-21 20:18:02,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:02,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811250947] [2024-06-21 20:18:02,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:02,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:02,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:02,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:18:02,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:02,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811250947] [2024-06-21 20:18:02,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811250947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:02,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:02,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:18:02,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224327853] [2024-06-21 20:18:02,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:02,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:18:02,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:02,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:18:02,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:18:02,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:18:02,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 301 transitions, 3856 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:02,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:02,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:18:02,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:03,481 INFO L124 PetriNetUnfolderBase]: 3638/6330 cut-off events. [2024-06-21 20:18:03,481 INFO L125 PetriNetUnfolderBase]: For 345416/345416 co-relation queries the response was YES. [2024-06-21 20:18:03,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38080 conditions, 6330 events. 3638/6330 cut-off events. For 345416/345416 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 44431 event pairs, 1171 based on Foata normal form. 2/6328 useless extension candidates. Maximal degree in co-relation 37979. Up to 5550 conditions per place. [2024-06-21 20:18:03,552 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 233 selfloop transitions, 70 changer transitions 3/315 dead transitions. [2024-06-21 20:18:03,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 315 transitions, 4628 flow [2024-06-21 20:18:03,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:18:03,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:18:03,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-21 20:18:03,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.623015873015873 [2024-06-21 20:18:03,553 INFO L175 Difference]: Start difference. First operand has 219 places, 301 transitions, 3856 flow. Second operand 6 states and 157 transitions. [2024-06-21 20:18:03,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 315 transitions, 4628 flow [2024-06-21 20:18:04,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 315 transitions, 4470 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 20:18:04,214 INFO L231 Difference]: Finished difference. Result has 221 places, 298 transitions, 3803 flow [2024-06-21 20:18:04,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3698, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3803, PETRI_PLACES=221, PETRI_TRANSITIONS=298} [2024-06-21 20:18:04,214 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-21 20:18:04,214 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 298 transitions, 3803 flow [2024-06-21 20:18:04,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:04,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:04,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:04,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 20:18:04,215 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:18:04,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:04,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1741756387, now seen corresponding path program 1 times [2024-06-21 20:18:04,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:04,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144398940] [2024-06-21 20:18:04,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:04,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:04,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:04,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:18:04,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:04,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144398940] [2024-06-21 20:18:04,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144398940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:04,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:04,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:18:04,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049424821] [2024-06-21 20:18:04,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:04,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:18:04,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:04,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:18:04,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:18:04,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:18:04,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 298 transitions, 3803 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:04,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:04,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:18:04,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:05,057 INFO L124 PetriNetUnfolderBase]: 3470/6033 cut-off events. [2024-06-21 20:18:05,057 INFO L125 PetriNetUnfolderBase]: For 359298/359298 co-relation queries the response was YES. [2024-06-21 20:18:05,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37304 conditions, 6033 events. 3470/6033 cut-off events. For 359298/359298 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 41903 event pairs, 1086 based on Foata normal form. 4/6028 useless extension candidates. Maximal degree in co-relation 37203. Up to 5393 conditions per place. [2024-06-21 20:18:05,119 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 266 selfloop transitions, 37 changer transitions 0/312 dead transitions. [2024-06-21 20:18:05,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 312 transitions, 4491 flow [2024-06-21 20:18:05,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:18:05,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:18:05,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-21 20:18:05,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-21 20:18:05,120 INFO L175 Difference]: Start difference. First operand has 221 places, 298 transitions, 3803 flow. Second operand 6 states and 149 transitions. [2024-06-21 20:18:05,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 312 transitions, 4491 flow [2024-06-21 20:18:05,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 312 transitions, 4209 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-21 20:18:05,822 INFO L231 Difference]: Finished difference. Result has 219 places, 301 transitions, 3663 flow [2024-06-21 20:18:05,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3521, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3663, PETRI_PLACES=219, PETRI_TRANSITIONS=301} [2024-06-21 20:18:05,823 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-21 20:18:05,823 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 301 transitions, 3663 flow [2024-06-21 20:18:05,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:05,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:05,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:05,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 20:18:05,824 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:18:05,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:05,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1998256897, now seen corresponding path program 2 times [2024-06-21 20:18:05,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:05,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888708210] [2024-06-21 20:18:05,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:05,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:05,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:05,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:18:05,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:05,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888708210] [2024-06-21 20:18:05,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888708210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:05,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:05,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:18:05,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077327929] [2024-06-21 20:18:05,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:05,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:18:05,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:05,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:18:05,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:18:05,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:18:05,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 301 transitions, 3663 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:05,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:05,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:18:05,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:06,665 INFO L124 PetriNetUnfolderBase]: 3486/6072 cut-off events. [2024-06-21 20:18:06,665 INFO L125 PetriNetUnfolderBase]: For 368078/368078 co-relation queries the response was YES. [2024-06-21 20:18:06,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37457 conditions, 6072 events. 3486/6072 cut-off events. For 368078/368078 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 42236 event pairs, 1077 based on Foata normal form. 4/6072 useless extension candidates. Maximal degree in co-relation 37355. Up to 5417 conditions per place. [2024-06-21 20:18:06,722 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 269 selfloop transitions, 40 changer transitions 0/318 dead transitions. [2024-06-21 20:18:06,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 318 transitions, 4377 flow [2024-06-21 20:18:06,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:18:06,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:18:06,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-21 20:18:06,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-21 20:18:06,723 INFO L175 Difference]: Start difference. First operand has 219 places, 301 transitions, 3663 flow. Second operand 6 states and 153 transitions. [2024-06-21 20:18:06,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 318 transitions, 4377 flow [2024-06-21 20:18:07,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 318 transitions, 4257 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-21 20:18:07,691 INFO L231 Difference]: Finished difference. Result has 221 places, 304 transitions, 3697 flow [2024-06-21 20:18:07,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3543, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3697, PETRI_PLACES=221, PETRI_TRANSITIONS=304} [2024-06-21 20:18:07,692 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-21 20:18:07,692 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 304 transitions, 3697 flow [2024-06-21 20:18:07,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:07,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:07,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:07,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 20:18:07,693 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:18:07,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:07,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1732233187, now seen corresponding path program 3 times [2024-06-21 20:18:07,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:07,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699342168] [2024-06-21 20:18:07,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:07,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:07,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:07,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:18:07,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:07,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699342168] [2024-06-21 20:18:07,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699342168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:07,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:07,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:18:07,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995208878] [2024-06-21 20:18:07,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:07,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:18:07,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:07,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:18:07,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:18:07,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:18:07,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 304 transitions, 3697 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:07,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:07,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:18:07,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:08,532 INFO L124 PetriNetUnfolderBase]: 3489/6074 cut-off events. [2024-06-21 20:18:08,532 INFO L125 PetriNetUnfolderBase]: For 375456/375456 co-relation queries the response was YES. [2024-06-21 20:18:08,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37542 conditions, 6074 events. 3489/6074 cut-off events. For 375456/375456 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 42321 event pairs, 1081 based on Foata normal form. 4/6069 useless extension candidates. Maximal degree in co-relation 37439. Up to 5370 conditions per place. [2024-06-21 20:18:08,592 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 264 selfloop transitions, 46 changer transitions 0/319 dead transitions. [2024-06-21 20:18:08,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 319 transitions, 4413 flow [2024-06-21 20:18:08,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:18:08,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:18:08,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-21 20:18:08,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-21 20:18:08,593 INFO L175 Difference]: Start difference. First operand has 221 places, 304 transitions, 3697 flow. Second operand 6 states and 150 transitions. [2024-06-21 20:18:08,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 319 transitions, 4413 flow [2024-06-21 20:18:09,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 319 transitions, 4281 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-21 20:18:09,431 INFO L231 Difference]: Finished difference. Result has 223 places, 307 transitions, 3737 flow [2024-06-21 20:18:09,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3565, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3737, PETRI_PLACES=223, PETRI_TRANSITIONS=307} [2024-06-21 20:18:09,431 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-21 20:18:09,431 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 307 transitions, 3737 flow [2024-06-21 20:18:09,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:09,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:09,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:09,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 20:18:09,432 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:18:09,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:09,432 INFO L85 PathProgramCache]: Analyzing trace with hash -567846408, now seen corresponding path program 1 times [2024-06-21 20:18:09,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:09,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801635746] [2024-06-21 20:18:09,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:09,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:09,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:09,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:18:09,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:09,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801635746] [2024-06-21 20:18:09,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801635746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:09,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:09,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:18:09,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190645954] [2024-06-21 20:18:09,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:09,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:18:09,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:09,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:18:09,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:18:09,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:18:09,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 307 transitions, 3737 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:09,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:09,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:18:09,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:10,386 INFO L124 PetriNetUnfolderBase]: 3494/6074 cut-off events. [2024-06-21 20:18:10,387 INFO L125 PetriNetUnfolderBase]: For 379167/379167 co-relation queries the response was YES. [2024-06-21 20:18:10,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37771 conditions, 6074 events. 3494/6074 cut-off events. For 379167/379167 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 42062 event pairs, 1044 based on Foata normal form. 1/6061 useless extension candidates. Maximal degree in co-relation 37667. Up to 5291 conditions per place. [2024-06-21 20:18:10,440 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 242 selfloop transitions, 85 changer transitions 0/336 dead transitions. [2024-06-21 20:18:10,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 336 transitions, 4899 flow [2024-06-21 20:18:10,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:18:10,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:18:10,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-21 20:18:10,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-21 20:18:10,441 INFO L175 Difference]: Start difference. First operand has 223 places, 307 transitions, 3737 flow. Second operand 7 states and 189 transitions. [2024-06-21 20:18:10,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 336 transitions, 4899 flow [2024-06-21 20:18:11,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 336 transitions, 4749 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-21 20:18:11,073 INFO L231 Difference]: Finished difference. Result has 226 places, 310 transitions, 3805 flow [2024-06-21 20:18:11,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3587, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3805, PETRI_PLACES=226, PETRI_TRANSITIONS=310} [2024-06-21 20:18:11,074 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 183 predicate places. [2024-06-21 20:18:11,074 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 310 transitions, 3805 flow [2024-06-21 20:18:11,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:11,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:11,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:11,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 20:18:11,074 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:18:11,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:11,075 INFO L85 PathProgramCache]: Analyzing trace with hash 986087862, now seen corresponding path program 2 times [2024-06-21 20:18:11,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:11,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671151670] [2024-06-21 20:18:11,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:11,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:11,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:11,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:18:11,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:11,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671151670] [2024-06-21 20:18:11,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671151670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:11,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:11,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:18:11,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134830794] [2024-06-21 20:18:11,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:11,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:18:11,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:11,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:18:11,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:18:11,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:18:11,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 310 transitions, 3805 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:11,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:11,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:18:11,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:11,944 INFO L124 PetriNetUnfolderBase]: 3499/6086 cut-off events. [2024-06-21 20:18:11,944 INFO L125 PetriNetUnfolderBase]: For 389010/389010 co-relation queries the response was YES. [2024-06-21 20:18:11,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37950 conditions, 6086 events. 3499/6086 cut-off events. For 389010/389010 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 42163 event pairs, 1078 based on Foata normal form. 1/6074 useless extension candidates. Maximal degree in co-relation 37845. Up to 5295 conditions per place. [2024-06-21 20:18:12,005 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 236 selfloop transitions, 88 changer transitions 0/333 dead transitions. [2024-06-21 20:18:12,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 333 transitions, 4951 flow [2024-06-21 20:18:12,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:18:12,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:18:12,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-21 20:18:12,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-21 20:18:12,006 INFO L175 Difference]: Start difference. First operand has 226 places, 310 transitions, 3805 flow. Second operand 7 states and 182 transitions. [2024-06-21 20:18:12,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 333 transitions, 4951 flow [2024-06-21 20:18:12,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 333 transitions, 4805 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 20:18:12,734 INFO L231 Difference]: Finished difference. Result has 229 places, 313 transitions, 3883 flow [2024-06-21 20:18:12,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3665, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3883, PETRI_PLACES=229, PETRI_TRANSITIONS=313} [2024-06-21 20:18:12,734 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-21 20:18:12,734 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 313 transitions, 3883 flow [2024-06-21 20:18:12,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:12,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:12,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:12,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 20:18:12,735 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:18:12,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:12,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1415657962, now seen corresponding path program 1 times [2024-06-21 20:18:12,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:12,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513092226] [2024-06-21 20:18:12,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:12,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:12,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:12,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:18:12,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:12,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513092226] [2024-06-21 20:18:12,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513092226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:12,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:12,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:18:12,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7715762] [2024-06-21 20:18:12,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:12,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:18:12,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:12,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:18:12,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:18:12,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:18:12,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 313 transitions, 3883 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:12,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:12,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:18:12,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:13,777 INFO L124 PetriNetUnfolderBase]: 3515/6113 cut-off events. [2024-06-21 20:18:13,777 INFO L125 PetriNetUnfolderBase]: For 406769/406769 co-relation queries the response was YES. [2024-06-21 20:18:13,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38239 conditions, 6113 events. 3515/6113 cut-off events. For 406769/406769 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 42308 event pairs, 948 based on Foata normal form. 4/6115 useless extension candidates. Maximal degree in co-relation 38133. Up to 5411 conditions per place. [2024-06-21 20:18:13,831 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 312 selfloop transitions, 28 changer transitions 0/349 dead transitions. [2024-06-21 20:18:13,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 349 transitions, 4814 flow [2024-06-21 20:18:13,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:18:13,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:18:13,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-21 20:18:13,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6101190476190477 [2024-06-21 20:18:13,832 INFO L175 Difference]: Start difference. First operand has 229 places, 313 transitions, 3883 flow. Second operand 8 states and 205 transitions. [2024-06-21 20:18:13,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 349 transitions, 4814 flow [2024-06-21 20:18:14,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 349 transitions, 4672 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 20:18:14,657 INFO L231 Difference]: Finished difference. Result has 233 places, 316 transitions, 3838 flow [2024-06-21 20:18:14,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3741, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3838, PETRI_PLACES=233, PETRI_TRANSITIONS=316} [2024-06-21 20:18:14,657 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-21 20:18:14,657 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 316 transitions, 3838 flow [2024-06-21 20:18:14,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:14,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:14,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:14,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 20:18:14,658 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:18:14,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:14,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1406134762, now seen corresponding path program 2 times [2024-06-21 20:18:14,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:14,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393788510] [2024-06-21 20:18:14,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:14,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:14,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:14,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:18:14,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:14,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393788510] [2024-06-21 20:18:14,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393788510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:14,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:14,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:18:14,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671591518] [2024-06-21 20:18:14,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:14,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:18:14,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:14,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:18:14,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:18:14,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:18:14,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 316 transitions, 3838 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:14,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:14,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:18:14,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:15,602 INFO L124 PetriNetUnfolderBase]: 3495/6086 cut-off events. [2024-06-21 20:18:15,603 INFO L125 PetriNetUnfolderBase]: For 407376/407376 co-relation queries the response was YES. [2024-06-21 20:18:15,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37828 conditions, 6086 events. 3495/6086 cut-off events. For 407376/407376 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 42243 event pairs, 1045 based on Foata normal form. 4/6088 useless extension candidates. Maximal degree in co-relation 37721. Up to 5497 conditions per place. [2024-06-21 20:18:15,664 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 314 selfloop transitions, 21 changer transitions 0/344 dead transitions. [2024-06-21 20:18:15,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 344 transitions, 4578 flow [2024-06-21 20:18:15,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:18:15,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:18:15,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-21 20:18:15,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5922619047619048 [2024-06-21 20:18:15,665 INFO L175 Difference]: Start difference. First operand has 233 places, 316 transitions, 3838 flow. Second operand 8 states and 199 transitions. [2024-06-21 20:18:15,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 344 transitions, 4578 flow [2024-06-21 20:18:16,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 344 transitions, 4523 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 20:18:16,602 INFO L231 Difference]: Finished difference. Result has 236 places, 316 transitions, 3831 flow [2024-06-21 20:18:16,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3783, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3831, PETRI_PLACES=236, PETRI_TRANSITIONS=316} [2024-06-21 20:18:16,603 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 193 predicate places. [2024-06-21 20:18:16,603 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 316 transitions, 3831 flow [2024-06-21 20:18:16,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:16,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:16,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:16,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 20:18:16,603 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:18:16,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:16,604 INFO L85 PathProgramCache]: Analyzing trace with hash 986084886, now seen corresponding path program 3 times [2024-06-21 20:18:16,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:16,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612336989] [2024-06-21 20:18:16,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:16,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:16,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:16,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:18:16,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:16,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612336989] [2024-06-21 20:18:16,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612336989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:16,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:16,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:18:16,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625247305] [2024-06-21 20:18:16,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:16,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:18:16,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:16,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:18:16,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:18:16,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:18:16,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 316 transitions, 3831 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:16,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:16,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:18:16,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:17,599 INFO L124 PetriNetUnfolderBase]: 3511/6098 cut-off events. [2024-06-21 20:18:17,599 INFO L125 PetriNetUnfolderBase]: For 421421/421421 co-relation queries the response was YES. [2024-06-21 20:18:17,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38239 conditions, 6098 events. 3511/6098 cut-off events. For 421421/421421 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 42273 event pairs, 1068 based on Foata normal form. 4/6089 useless extension candidates. Maximal degree in co-relation 38131. Up to 5299 conditions per place. [2024-06-21 20:18:17,652 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 240 selfloop transitions, 91 changer transitions 0/340 dead transitions. [2024-06-21 20:18:17,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 340 transitions, 5065 flow [2024-06-21 20:18:17,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:18:17,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:18:17,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-21 20:18:17,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6224489795918368 [2024-06-21 20:18:17,654 INFO L175 Difference]: Start difference. First operand has 236 places, 316 transitions, 3831 flow. Second operand 7 states and 183 transitions. [2024-06-21 20:18:17,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 340 transitions, 5065 flow [2024-06-21 20:18:18,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 340 transitions, 4993 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 20:18:18,613 INFO L231 Difference]: Finished difference. Result has 235 places, 319 transitions, 4049 flow [2024-06-21 20:18:18,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3759, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4049, PETRI_PLACES=235, PETRI_TRANSITIONS=319} [2024-06-21 20:18:18,613 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 192 predicate places. [2024-06-21 20:18:18,613 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 319 transitions, 4049 flow [2024-06-21 20:18:18,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:18,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:18,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:18,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 20:18:18,614 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:18:18,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:18,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1125194538, now seen corresponding path program 1 times [2024-06-21 20:18:18,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:18,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115208450] [2024-06-21 20:18:18,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:18,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:18,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:18,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:18:18,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:18,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115208450] [2024-06-21 20:18:18,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115208450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:18,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:18,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:18:18,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668936908] [2024-06-21 20:18:18,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:18,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:18:18,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:18,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:18:18,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:18:18,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:18:18,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 319 transitions, 4049 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:18,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:18,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:18:18,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:19,543 INFO L124 PetriNetUnfolderBase]: 3516/6106 cut-off events. [2024-06-21 20:18:19,543 INFO L125 PetriNetUnfolderBase]: For 426449/426449 co-relation queries the response was YES. [2024-06-21 20:18:19,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38751 conditions, 6106 events. 3516/6106 cut-off events. For 426449/426449 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 42331 event pairs, 1077 based on Foata normal form. 1/6095 useless extension candidates. Maximal degree in co-relation 38642. Up to 5336 conditions per place. [2024-06-21 20:18:19,610 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 259 selfloop transitions, 78 changer transitions 0/346 dead transitions. [2024-06-21 20:18:19,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 346 transitions, 4957 flow [2024-06-21 20:18:19,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:18:19,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:18:19,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-21 20:18:19,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6326530612244898 [2024-06-21 20:18:19,611 INFO L175 Difference]: Start difference. First operand has 235 places, 319 transitions, 4049 flow. Second operand 7 states and 186 transitions. [2024-06-21 20:18:19,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 346 transitions, 4957 flow [2024-06-21 20:18:20,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 346 transitions, 4689 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-21 20:18:20,821 INFO L231 Difference]: Finished difference. Result has 237 places, 322 transitions, 3973 flow [2024-06-21 20:18:20,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3781, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3973, PETRI_PLACES=237, PETRI_TRANSITIONS=322} [2024-06-21 20:18:20,821 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-21 20:18:20,821 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 322 transitions, 3973 flow [2024-06-21 20:18:20,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:20,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:20,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:20,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 20:18:20,822 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:18:20,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:20,822 INFO L85 PathProgramCache]: Analyzing trace with hash 634389880, now seen corresponding path program 2 times [2024-06-21 20:18:20,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:20,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504849167] [2024-06-21 20:18:20,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:20,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:20,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:20,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:18:20,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:20,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504849167] [2024-06-21 20:18:20,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504849167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:20,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:20,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:18:20,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355510400] [2024-06-21 20:18:20,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:20,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:18:20,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:20,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:18:20,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:18:20,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:18:20,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 322 transitions, 3973 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:20,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:20,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:18:20,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:21,784 INFO L124 PetriNetUnfolderBase]: 3529/6127 cut-off events. [2024-06-21 20:18:21,784 INFO L125 PetriNetUnfolderBase]: For 437587/437587 co-relation queries the response was YES. [2024-06-21 20:18:21,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38791 conditions, 6127 events. 3529/6127 cut-off events. For 437587/437587 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 42497 event pairs, 1077 based on Foata normal form. 1/6116 useless extension candidates. Maximal degree in co-relation 38681. Up to 5346 conditions per place. [2024-06-21 20:18:21,839 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 251 selfloop transitions, 86 changer transitions 0/346 dead transitions. [2024-06-21 20:18:21,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 346 transitions, 5055 flow [2024-06-21 20:18:21,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:18:21,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:18:21,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-21 20:18:21,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-06-21 20:18:21,840 INFO L175 Difference]: Start difference. First operand has 237 places, 322 transitions, 3973 flow. Second operand 6 states and 160 transitions. [2024-06-21 20:18:21,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 346 transitions, 5055 flow [2024-06-21 20:18:23,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 346 transitions, 4895 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 20:18:23,159 INFO L231 Difference]: Finished difference. Result has 239 places, 328 transitions, 4063 flow [2024-06-21 20:18:23,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3825, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4063, PETRI_PLACES=239, PETRI_TRANSITIONS=328} [2024-06-21 20:18:23,160 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-21 20:18:23,160 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 328 transitions, 4063 flow [2024-06-21 20:18:23,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:23,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:23,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:23,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 20:18:23,160 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:18:23,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:23,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1974182714, now seen corresponding path program 3 times [2024-06-21 20:18:23,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:23,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863934037] [2024-06-21 20:18:23,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:23,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:23,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:23,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:18:23,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:23,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863934037] [2024-06-21 20:18:23,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863934037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:23,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:23,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:18:23,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343665034] [2024-06-21 20:18:23,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:23,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:18:23,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:23,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:18:23,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:18:23,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:18:23,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 328 transitions, 4063 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:23,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:23,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:18:23,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:24,074 INFO L124 PetriNetUnfolderBase]: 3526/6126 cut-off events. [2024-06-21 20:18:24,074 INFO L125 PetriNetUnfolderBase]: For 446069/446069 co-relation queries the response was YES. [2024-06-21 20:18:24,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38853 conditions, 6126 events. 3526/6126 cut-off events. For 446069/446069 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 42610 event pairs, 1059 based on Foata normal form. 1/6121 useless extension candidates. Maximal degree in co-relation 38742. Up to 5334 conditions per place. [2024-06-21 20:18:24,139 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 258 selfloop transitions, 83 changer transitions 0/350 dead transitions. [2024-06-21 20:18:24,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 350 transitions, 5095 flow [2024-06-21 20:18:24,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:18:24,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:18:24,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-21 20:18:24,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-06-21 20:18:24,141 INFO L175 Difference]: Start difference. First operand has 239 places, 328 transitions, 4063 flow. Second operand 7 states and 184 transitions. [2024-06-21 20:18:24,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 350 transitions, 5095 flow [2024-06-21 20:18:25,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 350 transitions, 4985 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 20:18:25,316 INFO L231 Difference]: Finished difference. Result has 244 places, 328 transitions, 4125 flow [2024-06-21 20:18:25,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3953, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4125, PETRI_PLACES=244, PETRI_TRANSITIONS=328} [2024-06-21 20:18:25,316 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-21 20:18:25,316 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 328 transitions, 4125 flow [2024-06-21 20:18:25,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:25,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:25,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:25,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 20:18:25,317 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:18:25,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:25,317 INFO L85 PathProgramCache]: Analyzing trace with hash 218188978, now seen corresponding path program 4 times [2024-06-21 20:18:25,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:25,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823301158] [2024-06-21 20:18:25,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:25,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:25,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:25,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:18:25,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:25,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823301158] [2024-06-21 20:18:25,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823301158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:25,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:25,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:18:25,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22182631] [2024-06-21 20:18:25,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:25,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:18:25,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:25,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:18:25,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:18:25,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:18:25,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 328 transitions, 4125 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:25,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:25,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:18:25,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:26,336 INFO L124 PetriNetUnfolderBase]: 3520/6096 cut-off events. [2024-06-21 20:18:26,336 INFO L125 PetriNetUnfolderBase]: For 456153/456153 co-relation queries the response was YES. [2024-06-21 20:18:26,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38826 conditions, 6096 events. 3520/6096 cut-off events. For 456153/456153 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 42272 event pairs, 1098 based on Foata normal form. 2/6084 useless extension candidates. Maximal degree in co-relation 38714. Up to 5329 conditions per place. [2024-06-21 20:18:26,398 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 250 selfloop transitions, 82 changer transitions 0/341 dead transitions. [2024-06-21 20:18:26,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 341 transitions, 5119 flow [2024-06-21 20:18:26,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:18:26,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:18:26,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 20:18:26,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2024-06-21 20:18:26,399 INFO L175 Difference]: Start difference. First operand has 244 places, 328 transitions, 4125 flow. Second operand 7 states and 177 transitions. [2024-06-21 20:18:26,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 341 transitions, 5119 flow [2024-06-21 20:18:27,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 341 transitions, 4884 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 20:18:27,477 INFO L231 Difference]: Finished difference. Result has 244 places, 328 transitions, 4061 flow [2024-06-21 20:18:27,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3890, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4061, PETRI_PLACES=244, PETRI_TRANSITIONS=328} [2024-06-21 20:18:27,478 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-21 20:18:27,478 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 328 transitions, 4061 flow [2024-06-21 20:18:27,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:27,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:27,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:27,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 20:18:27,479 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:18:27,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:27,479 INFO L85 PathProgramCache]: Analyzing trace with hash 140109334, now seen corresponding path program 4 times [2024-06-21 20:18:27,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:27,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407227983] [2024-06-21 20:18:27,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:27,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:27,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:27,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:18:27,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:27,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407227983] [2024-06-21 20:18:27,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407227983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:27,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:27,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:18:27,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145522284] [2024-06-21 20:18:27,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:27,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:18:27,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:27,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:18:27,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:18:27,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:18:27,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 328 transitions, 4061 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:27,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:27,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:18:27,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:28,452 INFO L124 PetriNetUnfolderBase]: 3579/6187 cut-off events. [2024-06-21 20:18:28,453 INFO L125 PetriNetUnfolderBase]: For 516797/516797 co-relation queries the response was YES. [2024-06-21 20:18:28,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39460 conditions, 6187 events. 3579/6187 cut-off events. For 516797/516797 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 42994 event pairs, 1107 based on Foata normal form. 20/6193 useless extension candidates. Maximal degree in co-relation 39347. Up to 5346 conditions per place. [2024-06-21 20:18:28,524 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 255 selfloop transitions, 84 changer transitions 0/348 dead transitions. [2024-06-21 20:18:28,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 348 transitions, 5197 flow [2024-06-21 20:18:28,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:18:28,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:18:28,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 20:18:28,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-21 20:18:28,525 INFO L175 Difference]: Start difference. First operand has 244 places, 328 transitions, 4061 flow. Second operand 7 states and 180 transitions. [2024-06-21 20:18:28,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 348 transitions, 5197 flow [2024-06-21 20:18:29,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 348 transitions, 5005 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 20:18:29,759 INFO L231 Difference]: Finished difference. Result has 245 places, 331 transitions, 4152 flow [2024-06-21 20:18:29,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3869, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4152, PETRI_PLACES=245, PETRI_TRANSITIONS=331} [2024-06-21 20:18:29,759 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-21 20:18:29,759 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 331 transitions, 4152 flow [2024-06-21 20:18:29,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:29,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:29,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:29,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 20:18:29,760 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:18:29,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:29,760 INFO L85 PathProgramCache]: Analyzing trace with hash 161026214, now seen corresponding path program 3 times [2024-06-21 20:18:29,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:29,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669768069] [2024-06-21 20:18:29,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:29,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:29,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:29,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:18:29,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:29,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669768069] [2024-06-21 20:18:29,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669768069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:29,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:29,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:18:29,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071274167] [2024-06-21 20:18:29,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:29,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:18:29,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:29,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:18:29,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:18:29,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:18:29,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 331 transitions, 4152 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:29,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:29,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:18:29,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:30,692 INFO L124 PetriNetUnfolderBase]: 3584/6223 cut-off events. [2024-06-21 20:18:30,692 INFO L125 PetriNetUnfolderBase]: For 473250/473250 co-relation queries the response was YES. [2024-06-21 20:18:30,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39823 conditions, 6223 events. 3584/6223 cut-off events. For 473250/473250 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 43320 event pairs, 1083 based on Foata normal form. 1/6220 useless extension candidates. Maximal degree in co-relation 39708. Up to 5431 conditions per place. [2024-06-21 20:18:30,762 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 268 selfloop transitions, 78 changer transitions 0/355 dead transitions. [2024-06-21 20:18:30,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 355 transitions, 5083 flow [2024-06-21 20:18:30,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:18:30,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:18:30,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-21 20:18:30,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-06-21 20:18:30,763 INFO L175 Difference]: Start difference. First operand has 245 places, 331 transitions, 4152 flow. Second operand 7 states and 184 transitions. [2024-06-21 20:18:30,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 355 transitions, 5083 flow [2024-06-21 20:18:31,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 355 transitions, 4838 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-21 20:18:31,901 INFO L231 Difference]: Finished difference. Result has 247 places, 334 transitions, 4104 flow [2024-06-21 20:18:31,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3907, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4104, PETRI_PLACES=247, PETRI_TRANSITIONS=334} [2024-06-21 20:18:31,902 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-21 20:18:31,902 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 334 transitions, 4104 flow [2024-06-21 20:18:31,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:31,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:31,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:31,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 20:18:31,902 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:18:31,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:31,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1120228062, now seen corresponding path program 4 times [2024-06-21 20:18:31,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:31,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998333847] [2024-06-21 20:18:31,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:31,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:31,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:31,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:18:31,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:31,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998333847] [2024-06-21 20:18:31,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998333847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:31,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:31,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:18:31,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805181155] [2024-06-21 20:18:31,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:31,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:18:31,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:31,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:18:31,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:18:32,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:18:32,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 334 transitions, 4104 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:32,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:32,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:18:32,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:32,847 INFO L124 PetriNetUnfolderBase]: 3581/6219 cut-off events. [2024-06-21 20:18:32,847 INFO L125 PetriNetUnfolderBase]: For 476342/476342 co-relation queries the response was YES. [2024-06-21 20:18:32,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39291 conditions, 6219 events. 3581/6219 cut-off events. For 476342/476342 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 43341 event pairs, 1076 based on Foata normal form. 1/6216 useless extension candidates. Maximal degree in co-relation 39175. Up to 5429 conditions per place. [2024-06-21 20:18:32,923 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 269 selfloop transitions, 80 changer transitions 0/358 dead transitions. [2024-06-21 20:18:32,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 358 transitions, 5172 flow [2024-06-21 20:18:32,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:18:32,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:18:32,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-21 20:18:32,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6005291005291006 [2024-06-21 20:18:32,925 INFO L175 Difference]: Start difference. First operand has 247 places, 334 transitions, 4104 flow. Second operand 9 states and 227 transitions. [2024-06-21 20:18:32,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 358 transitions, 5172 flow [2024-06-21 20:18:34,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 358 transitions, 5063 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 20:18:34,194 INFO L231 Difference]: Finished difference. Result has 252 places, 334 transitions, 4161 flow [2024-06-21 20:18:34,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3995, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4161, PETRI_PLACES=252, PETRI_TRANSITIONS=334} [2024-06-21 20:18:34,195 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 209 predicate places. [2024-06-21 20:18:34,195 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 334 transitions, 4161 flow [2024-06-21 20:18:34,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:34,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:34,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:34,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 20:18:34,195 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:18:34,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:34,196 INFO L85 PathProgramCache]: Analyzing trace with hash 2124365594, now seen corresponding path program 5 times [2024-06-21 20:18:34,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:34,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397056077] [2024-06-21 20:18:34,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:34,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:34,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:34,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:18:34,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:34,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397056077] [2024-06-21 20:18:34,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397056077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:34,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:34,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:18:34,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278306531] [2024-06-21 20:18:34,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:34,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:18:34,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:34,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:18:34,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:18:34,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:18:34,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 334 transitions, 4161 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:34,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:34,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:18:34,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:35,207 INFO L124 PetriNetUnfolderBase]: 3573/6206 cut-off events. [2024-06-21 20:18:35,207 INFO L125 PetriNetUnfolderBase]: For 485321/485321 co-relation queries the response was YES. [2024-06-21 20:18:35,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39242 conditions, 6206 events. 3573/6206 cut-off events. For 485321/485321 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 43204 event pairs, 1076 based on Foata normal form. 2/6204 useless extension candidates. Maximal degree in co-relation 39124. Up to 5421 conditions per place. [2024-06-21 20:18:35,277 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 266 selfloop transitions, 77 changer transitions 0/352 dead transitions. [2024-06-21 20:18:35,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 352 transitions, 5049 flow [2024-06-21 20:18:35,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:18:35,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:18:35,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-21 20:18:35,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-21 20:18:35,278 INFO L175 Difference]: Start difference. First operand has 252 places, 334 transitions, 4161 flow. Second operand 7 states and 182 transitions. [2024-06-21 20:18:35,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 352 transitions, 5049 flow [2024-06-21 20:18:36,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 352 transitions, 4815 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-21 20:18:36,363 INFO L231 Difference]: Finished difference. Result has 250 places, 334 transitions, 4089 flow [2024-06-21 20:18:36,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3927, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4089, PETRI_PLACES=250, PETRI_TRANSITIONS=334} [2024-06-21 20:18:36,363 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-21 20:18:36,364 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 334 transitions, 4089 flow [2024-06-21 20:18:36,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:36,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:36,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:36,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 20:18:36,364 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:18:36,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:36,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1947503984, now seen corresponding path program 6 times [2024-06-21 20:18:36,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:36,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000640674] [2024-06-21 20:18:36,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:36,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:36,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:36,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:18:36,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:36,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000640674] [2024-06-21 20:18:36,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000640674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:36,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:36,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:18:36,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083523196] [2024-06-21 20:18:36,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:36,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:18:36,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:36,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:18:36,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:18:36,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:18:36,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 334 transitions, 4089 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:36,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:36,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:18:36,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:37,363 INFO L124 PetriNetUnfolderBase]: 3583/6200 cut-off events. [2024-06-21 20:18:37,364 INFO L125 PetriNetUnfolderBase]: For 496963/496963 co-relation queries the response was YES. [2024-06-21 20:18:37,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39421 conditions, 6200 events. 3583/6200 cut-off events. For 496963/496963 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 43228 event pairs, 1105 based on Foata normal form. 2/6184 useless extension candidates. Maximal degree in co-relation 39303. Up to 5431 conditions per place. [2024-06-21 20:18:37,430 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 256 selfloop transitions, 84 changer transitions 0/349 dead transitions. [2024-06-21 20:18:37,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 349 transitions, 5008 flow [2024-06-21 20:18:37,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:18:37,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:18:37,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-21 20:18:37,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6150793650793651 [2024-06-21 20:18:37,431 INFO L175 Difference]: Start difference. First operand has 250 places, 334 transitions, 4089 flow. Second operand 6 states and 155 transitions. [2024-06-21 20:18:37,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 349 transitions, 5008 flow [2024-06-21 20:18:38,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 349 transitions, 4848 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 20:18:38,624 INFO L231 Difference]: Finished difference. Result has 250 places, 338 transitions, 4157 flow [2024-06-21 20:18:38,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3935, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4157, PETRI_PLACES=250, PETRI_TRANSITIONS=338} [2024-06-21 20:18:38,624 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-21 20:18:38,624 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 338 transitions, 4157 flow [2024-06-21 20:18:38,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:38,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:38,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:38,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 20:18:38,625 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:18:38,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:38,625 INFO L85 PathProgramCache]: Analyzing trace with hash -298911146, now seen corresponding path program 7 times [2024-06-21 20:18:38,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:38,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049658640] [2024-06-21 20:18:38,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:38,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:38,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:38,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:18:38,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:38,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049658640] [2024-06-21 20:18:38,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049658640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:38,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:38,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:18:38,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747917273] [2024-06-21 20:18:38,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:38,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:18:38,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:38,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:18:38,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:18:38,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:18:38,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 338 transitions, 4157 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:38,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:38,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:18:38,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:39,521 INFO L124 PetriNetUnfolderBase]: 3575/6188 cut-off events. [2024-06-21 20:18:39,522 INFO L125 PetriNetUnfolderBase]: For 501744/501744 co-relation queries the response was YES. [2024-06-21 20:18:39,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39328 conditions, 6188 events. 3575/6188 cut-off events. For 501744/501744 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 43075 event pairs, 1105 based on Foata normal form. 2/6172 useless extension candidates. Maximal degree in co-relation 39209. Up to 5423 conditions per place. [2024-06-21 20:18:39,586 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 259 selfloop transitions, 80 changer transitions 0/348 dead transitions. [2024-06-21 20:18:39,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 348 transitions, 4859 flow [2024-06-21 20:18:39,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:18:39,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:18:39,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-21 20:18:39,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-21 20:18:39,587 INFO L175 Difference]: Start difference. First operand has 250 places, 338 transitions, 4157 flow. Second operand 6 states and 153 transitions. [2024-06-21 20:18:39,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 348 transitions, 4859 flow [2024-06-21 20:18:40,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 348 transitions, 4564 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 20:18:40,698 INFO L231 Difference]: Finished difference. Result has 250 places, 338 transitions, 4031 flow [2024-06-21 20:18:40,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3862, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4031, PETRI_PLACES=250, PETRI_TRANSITIONS=338} [2024-06-21 20:18:40,699 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-21 20:18:40,699 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 338 transitions, 4031 flow [2024-06-21 20:18:40,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:40,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:40,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:40,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 20:18:40,699 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:18:40,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:40,700 INFO L85 PathProgramCache]: Analyzing trace with hash -869801354, now seen corresponding path program 1 times [2024-06-21 20:18:40,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:40,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606992042] [2024-06-21 20:18:40,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:40,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:40,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:40,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:18:40,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:40,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606992042] [2024-06-21 20:18:40,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606992042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:40,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:40,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:18:40,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252765165] [2024-06-21 20:18:40,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:40,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:18:40,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:40,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:18:40,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:18:40,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:18:40,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 338 transitions, 4031 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:40,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:40,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:18:40,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:41,750 INFO L124 PetriNetUnfolderBase]: 3596/6248 cut-off events. [2024-06-21 20:18:41,750 INFO L125 PetriNetUnfolderBase]: For 520955/520955 co-relation queries the response was YES. [2024-06-21 20:18:41,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39988 conditions, 6248 events. 3596/6248 cut-off events. For 520955/520955 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 43512 event pairs, 967 based on Foata normal form. 2/6248 useless extension candidates. Maximal degree in co-relation 39868. Up to 5636 conditions per place. [2024-06-21 20:18:41,810 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 330 selfloop transitions, 27 changer transitions 0/366 dead transitions. [2024-06-21 20:18:41,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 366 transitions, 5119 flow [2024-06-21 20:18:41,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:18:41,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:18:41,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-21 20:18:41,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5863095238095238 [2024-06-21 20:18:41,811 INFO L175 Difference]: Start difference. First operand has 250 places, 338 transitions, 4031 flow. Second operand 8 states and 197 transitions. [2024-06-21 20:18:41,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 366 transitions, 5119 flow [2024-06-21 20:18:43,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 366 transitions, 4925 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 20:18:43,014 INFO L231 Difference]: Finished difference. Result has 252 places, 342 transitions, 4052 flow [2024-06-21 20:18:43,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3837, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4052, PETRI_PLACES=252, PETRI_TRANSITIONS=342} [2024-06-21 20:18:43,014 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 209 predicate places. [2024-06-21 20:18:43,015 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 342 transitions, 4052 flow [2024-06-21 20:18:43,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:43,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:43,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:43,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 20:18:43,015 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:18:43,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:43,015 INFO L85 PathProgramCache]: Analyzing trace with hash 256529304, now seen corresponding path program 2 times [2024-06-21 20:18:43,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:43,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590805233] [2024-06-21 20:18:43,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:43,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:43,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:43,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:18:43,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:43,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590805233] [2024-06-21 20:18:43,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590805233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:43,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:43,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:18:43,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022252704] [2024-06-21 20:18:43,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:43,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:18:43,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:43,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:18:43,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:18:43,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:18:43,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 342 transitions, 4052 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:43,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:43,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:18:43,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:44,009 INFO L124 PetriNetUnfolderBase]: 3591/6241 cut-off events. [2024-06-21 20:18:44,009 INFO L125 PetriNetUnfolderBase]: For 526082/526082 co-relation queries the response was YES. [2024-06-21 20:18:44,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39757 conditions, 6241 events. 3591/6241 cut-off events. For 526082/526082 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 43453 event pairs, 1050 based on Foata normal form. 2/6241 useless extension candidates. Maximal degree in co-relation 39636. Up to 5664 conditions per place. [2024-06-21 20:18:44,077 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 329 selfloop transitions, 22 changer transitions 0/360 dead transitions. [2024-06-21 20:18:44,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 360 transitions, 4798 flow [2024-06-21 20:18:44,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:18:44,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:18:44,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-21 20:18:44,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5850340136054422 [2024-06-21 20:18:44,078 INFO L175 Difference]: Start difference. First operand has 252 places, 342 transitions, 4052 flow. Second operand 7 states and 172 transitions. [2024-06-21 20:18:44,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 360 transitions, 4798 flow [2024-06-21 20:18:45,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 360 transitions, 4635 flow, removed 69 selfloop flow, removed 4 redundant places. [2024-06-21 20:18:45,396 INFO L231 Difference]: Finished difference. Result has 255 places, 342 transitions, 3938 flow [2024-06-21 20:18:45,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3889, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3938, PETRI_PLACES=255, PETRI_TRANSITIONS=342} [2024-06-21 20:18:45,397 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 212 predicate places. [2024-06-21 20:18:45,397 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 342 transitions, 3938 flow [2024-06-21 20:18:45,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:45,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:45,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:45,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 20:18:45,398 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:18:45,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:45,398 INFO L85 PathProgramCache]: Analyzing trace with hash 392142586, now seen corresponding path program 3 times [2024-06-21 20:18:45,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:45,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404923453] [2024-06-21 20:18:45,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:45,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:45,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:45,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:18:45,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:45,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404923453] [2024-06-21 20:18:45,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404923453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:45,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:45,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:18:45,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896322595] [2024-06-21 20:18:45,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:45,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:18:45,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:45,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:18:45,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:18:45,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:18:45,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 342 transitions, 3938 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:45,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:45,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:18:45,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:46,431 INFO L124 PetriNetUnfolderBase]: 3586/6227 cut-off events. [2024-06-21 20:18:46,431 INFO L125 PetriNetUnfolderBase]: For 531044/531044 co-relation queries the response was YES. [2024-06-21 20:18:46,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39429 conditions, 6227 events. 3586/6227 cut-off events. For 531044/531044 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 43358 event pairs, 1056 based on Foata normal form. 2/6222 useless extension candidates. Maximal degree in co-relation 39306. Up to 5657 conditions per place. [2024-06-21 20:18:46,490 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 324 selfloop transitions, 22 changer transitions 0/355 dead transitions. [2024-06-21 20:18:46,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 355 transitions, 4736 flow [2024-06-21 20:18:46,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:18:46,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:18:46,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-21 20:18:46,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-21 20:18:46,491 INFO L175 Difference]: Start difference. First operand has 255 places, 342 transitions, 3938 flow. Second operand 6 states and 146 transitions. [2024-06-21 20:18:46,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 355 transitions, 4736 flow [2024-06-21 20:18:47,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 355 transitions, 4682 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 20:18:47,906 INFO L231 Difference]: Finished difference. Result has 255 places, 344 transitions, 4017 flow [2024-06-21 20:18:47,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3884, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4017, PETRI_PLACES=255, PETRI_TRANSITIONS=344} [2024-06-21 20:18:47,906 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 212 predicate places. [2024-06-21 20:18:47,907 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 344 transitions, 4017 flow [2024-06-21 20:18:47,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:47,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:47,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:47,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 20:18:47,907 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:18:47,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:47,907 INFO L85 PathProgramCache]: Analyzing trace with hash -640411164, now seen corresponding path program 1 times [2024-06-21 20:18:47,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:47,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248876062] [2024-06-21 20:18:47,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:47,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:47,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:47,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:18:47,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:47,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248876062] [2024-06-21 20:18:47,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248876062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:47,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:47,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:18:47,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131973672] [2024-06-21 20:18:47,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:47,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:18:47,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:47,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:18:47,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:18:47,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:18:47,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 344 transitions, 4017 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:47,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:47,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:18:47,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:48,844 INFO L124 PetriNetUnfolderBase]: 3591/6232 cut-off events. [2024-06-21 20:18:48,844 INFO L125 PetriNetUnfolderBase]: For 539044/539044 co-relation queries the response was YES. [2024-06-21 20:18:48,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39665 conditions, 6232 events. 3591/6232 cut-off events. For 539044/539044 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 43435 event pairs, 1060 based on Foata normal form. 1/6227 useless extension candidates. Maximal degree in co-relation 39541. Up to 5543 conditions per place. [2024-06-21 20:18:48,917 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 294 selfloop transitions, 58 changer transitions 0/361 dead transitions. [2024-06-21 20:18:48,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 361 transitions, 4974 flow [2024-06-21 20:18:48,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:18:48,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:18:48,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-21 20:18:48,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.623015873015873 [2024-06-21 20:18:48,919 INFO L175 Difference]: Start difference. First operand has 255 places, 344 transitions, 4017 flow. Second operand 6 states and 157 transitions. [2024-06-21 20:18:48,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 361 transitions, 4974 flow [2024-06-21 20:18:50,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 361 transitions, 4857 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-21 20:18:50,295 INFO L231 Difference]: Finished difference. Result has 257 places, 347 transitions, 4078 flow [2024-06-21 20:18:50,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3900, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4078, PETRI_PLACES=257, PETRI_TRANSITIONS=347} [2024-06-21 20:18:50,295 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 214 predicate places. [2024-06-21 20:18:50,295 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 347 transitions, 4078 flow [2024-06-21 20:18:50,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:50,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:50,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:50,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 20:18:50,296 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:18:50,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:50,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1722790722, now seen corresponding path program 2 times [2024-06-21 20:18:50,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:50,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733693883] [2024-06-21 20:18:50,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:50,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:50,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:50,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:18:50,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:50,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733693883] [2024-06-21 20:18:50,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733693883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:50,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:50,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:18:50,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804659010] [2024-06-21 20:18:50,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:50,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:18:50,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:50,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:18:50,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:18:50,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:18:50,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 347 transitions, 4078 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:50,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:50,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:18:50,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:51,259 INFO L124 PetriNetUnfolderBase]: 3588/6228 cut-off events. [2024-06-21 20:18:51,259 INFO L125 PetriNetUnfolderBase]: For 546408/546408 co-relation queries the response was YES. [2024-06-21 20:18:51,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39700 conditions, 6228 events. 3588/6228 cut-off events. For 546408/546408 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 43333 event pairs, 1060 based on Foata normal form. 1/6223 useless extension candidates. Maximal degree in co-relation 39575. Up to 5540 conditions per place. [2024-06-21 20:18:51,329 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 295 selfloop transitions, 56 changer transitions 0/360 dead transitions. [2024-06-21 20:18:51,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 360 transitions, 4812 flow [2024-06-21 20:18:51,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:18:51,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:18:51,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-21 20:18:51,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-21 20:18:51,330 INFO L175 Difference]: Start difference. First operand has 257 places, 347 transitions, 4078 flow. Second operand 6 states and 156 transitions. [2024-06-21 20:18:51,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 360 transitions, 4812 flow [2024-06-21 20:18:52,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 360 transitions, 4687 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 20:18:52,993 INFO L231 Difference]: Finished difference. Result has 258 places, 347 transitions, 4076 flow [2024-06-21 20:18:52,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3953, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4076, PETRI_PLACES=258, PETRI_TRANSITIONS=347} [2024-06-21 20:18:52,993 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-21 20:18:52,994 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 347 transitions, 4076 flow [2024-06-21 20:18:52,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:52,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:52,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:52,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 20:18:52,994 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:18:52,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:52,994 INFO L85 PathProgramCache]: Analyzing trace with hash 403318402, now seen corresponding path program 3 times [2024-06-21 20:18:52,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:52,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100854877] [2024-06-21 20:18:52,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:52,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:52,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:53,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:18:53,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:53,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100854877] [2024-06-21 20:18:53,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100854877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:53,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:53,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:18:53,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297309063] [2024-06-21 20:18:53,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:53,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:18:53,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:53,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:18:53,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:18:53,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:18:53,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 347 transitions, 4076 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:53,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:53,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:18:53,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:53,976 INFO L124 PetriNetUnfolderBase]: 3593/6237 cut-off events. [2024-06-21 20:18:53,976 INFO L125 PetriNetUnfolderBase]: For 546603/546603 co-relation queries the response was YES. [2024-06-21 20:18:54,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39769 conditions, 6237 events. 3593/6237 cut-off events. For 546603/546603 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 43469 event pairs, 1086 based on Foata normal form. 1/6232 useless extension candidates. Maximal degree in co-relation 39644. Up to 5443 conditions per place. [2024-06-21 20:18:54,049 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 272 selfloop transitions, 88 changer transitions 0/369 dead transitions. [2024-06-21 20:18:54,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 369 transitions, 5235 flow [2024-06-21 20:18:54,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:18:54,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:18:54,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 20:18:54,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-21 20:18:54,050 INFO L175 Difference]: Start difference. First operand has 258 places, 347 transitions, 4076 flow. Second operand 7 states and 180 transitions. [2024-06-21 20:18:54,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 369 transitions, 5235 flow [2024-06-21 20:18:55,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 369 transitions, 5080 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 20:18:55,351 INFO L231 Difference]: Finished difference. Result has 259 places, 350 transitions, 4157 flow [2024-06-21 20:18:55,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3925, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4157, PETRI_PLACES=259, PETRI_TRANSITIONS=350} [2024-06-21 20:18:55,351 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 216 predicate places. [2024-06-21 20:18:55,351 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 350 transitions, 4157 flow [2024-06-21 20:18:55,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:55,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:55,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:55,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 20:18:55,352 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:18:55,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:55,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1004114152, now seen corresponding path program 4 times [2024-06-21 20:18:55,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:55,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124111511] [2024-06-21 20:18:55,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:55,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:55,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:55,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:18:55,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:55,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124111511] [2024-06-21 20:18:55,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124111511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:55,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:55,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:18:55,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731334588] [2024-06-21 20:18:55,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:55,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:18:55,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:55,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:18:55,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:18:55,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:18:55,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 350 transitions, 4157 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:55,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:55,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:18:55,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:56,304 INFO L124 PetriNetUnfolderBase]: 3598/6246 cut-off events. [2024-06-21 20:18:56,304 INFO L125 PetriNetUnfolderBase]: For 546993/546993 co-relation queries the response was YES. [2024-06-21 20:18:56,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39898 conditions, 6246 events. 3598/6246 cut-off events. For 546993/546993 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 43580 event pairs, 1089 based on Foata normal form. 1/6241 useless extension candidates. Maximal degree in co-relation 39773. Up to 5449 conditions per place. [2024-06-21 20:18:56,376 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 271 selfloop transitions, 91 changer transitions 0/371 dead transitions. [2024-06-21 20:18:56,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 371 transitions, 5324 flow [2024-06-21 20:18:56,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:18:56,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:18:56,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-21 20:18:56,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-06-21 20:18:56,377 INFO L175 Difference]: Start difference. First operand has 259 places, 350 transitions, 4157 flow. Second operand 6 states and 160 transitions. [2024-06-21 20:18:56,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 371 transitions, 5324 flow [2024-06-21 20:18:57,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 371 transitions, 5099 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-21 20:18:57,638 INFO L231 Difference]: Finished difference. Result has 259 places, 353 transitions, 4176 flow [2024-06-21 20:18:57,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3951, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4176, PETRI_PLACES=259, PETRI_TRANSITIONS=353} [2024-06-21 20:18:57,638 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 216 predicate places. [2024-06-21 20:18:57,639 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 353 transitions, 4176 flow [2024-06-21 20:18:57,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:57,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:18:57,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:18:57,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 20:18:57,639 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:18:57,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:18:57,640 INFO L85 PathProgramCache]: Analyzing trace with hash -308665636, now seen corresponding path program 5 times [2024-06-21 20:18:57,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:18:57,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155395802] [2024-06-21 20:18:57,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:18:57,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:18:57,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:18:57,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:18:57,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:18:57,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155395802] [2024-06-21 20:18:57,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155395802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:18:57,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:18:57,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:18:57,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795201053] [2024-06-21 20:18:57,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:18:57,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:18:57,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:18:57,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:18:57,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:18:57,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:18:57,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 353 transitions, 4176 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:18:57,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:18:57,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:18:57,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:18:58,577 INFO L124 PetriNetUnfolderBase]: 3611/6257 cut-off events. [2024-06-21 20:18:58,577 INFO L125 PetriNetUnfolderBase]: For 563815/563815 co-relation queries the response was YES. [2024-06-21 20:18:58,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40224 conditions, 6257 events. 3611/6257 cut-off events. For 563815/563815 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 43689 event pairs, 1115 based on Foata normal form. 1/6244 useless extension candidates. Maximal degree in co-relation 40098. Up to 5464 conditions per place. [2024-06-21 20:18:58,650 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 266 selfloop transitions, 96 changer transitions 0/371 dead transitions. [2024-06-21 20:18:58,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 371 transitions, 5376 flow [2024-06-21 20:18:58,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:18:58,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:18:58,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-21 20:18:58,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-21 20:18:58,651 INFO L175 Difference]: Start difference. First operand has 259 places, 353 transitions, 4176 flow. Second operand 6 states and 153 transitions. [2024-06-21 20:18:58,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 371 transitions, 5376 flow [2024-06-21 20:19:00,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 371 transitions, 5184 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-21 20:19:00,312 INFO L231 Difference]: Finished difference. Result has 261 places, 359 transitions, 4282 flow [2024-06-21 20:19:00,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3996, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4282, PETRI_PLACES=261, PETRI_TRANSITIONS=359} [2024-06-21 20:19:00,313 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 218 predicate places. [2024-06-21 20:19:00,313 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 359 transitions, 4282 flow [2024-06-21 20:19:00,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:00,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:00,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:19:00,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 20:19:00,313 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:19:00,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:00,314 INFO L85 PathProgramCache]: Analyzing trace with hash -565569766, now seen corresponding path program 6 times [2024-06-21 20:19:00,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:00,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557736964] [2024-06-21 20:19:00,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:00,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:00,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:19:00,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:19:00,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:19:00,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557736964] [2024-06-21 20:19:00,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557736964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:19:00,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:19:00,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:19:00,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676809129] [2024-06-21 20:19:00,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:19:00,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:19:00,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:19:00,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:19:00,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:19:00,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:19:00,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 359 transitions, 4282 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:00,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:19:00,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:19:00,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:01,284 INFO L124 PetriNetUnfolderBase]: 3608/6264 cut-off events. [2024-06-21 20:19:01,284 INFO L125 PetriNetUnfolderBase]: For 571316/571316 co-relation queries the response was YES. [2024-06-21 20:19:01,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40257 conditions, 6264 events. 3608/6264 cut-off events. For 571316/571316 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 43663 event pairs, 1089 based on Foata normal form. 1/6259 useless extension candidates. Maximal degree in co-relation 40130. Up to 5461 conditions per place. [2024-06-21 20:19:01,355 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 264 selfloop transitions, 101 changer transitions 0/374 dead transitions. [2024-06-21 20:19:01,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 374 transitions, 5400 flow [2024-06-21 20:19:01,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:19:01,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:19:01,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-21 20:19:01,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.623015873015873 [2024-06-21 20:19:01,356 INFO L175 Difference]: Start difference. First operand has 261 places, 359 transitions, 4282 flow. Second operand 6 states and 157 transitions. [2024-06-21 20:19:01,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 374 transitions, 5400 flow [2024-06-21 20:19:02,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 374 transitions, 5186 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 20:19:02,976 INFO L231 Difference]: Finished difference. Result has 263 places, 359 transitions, 4276 flow [2024-06-21 20:19:02,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4068, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4276, PETRI_PLACES=263, PETRI_TRANSITIONS=359} [2024-06-21 20:19:02,976 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 220 predicate places. [2024-06-21 20:19:02,976 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 359 transitions, 4276 flow [2024-06-21 20:19:02,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:02,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:02,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:19:02,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 20:19:02,977 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:19:02,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:02,977 INFO L85 PathProgramCache]: Analyzing trace with hash -313427236, now seen corresponding path program 7 times [2024-06-21 20:19:02,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:02,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461173373] [2024-06-21 20:19:02,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:02,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:02,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:19:03,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:19:03,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:19:03,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461173373] [2024-06-21 20:19:03,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461173373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:19:03,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:19:03,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:19:03,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733128510] [2024-06-21 20:19:03,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:19:03,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:19:03,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:19:03,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:19:03,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:19:03,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:19:03,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 359 transitions, 4276 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:03,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:19:03,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:19:03,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:03,965 INFO L124 PetriNetUnfolderBase]: 3613/6249 cut-off events. [2024-06-21 20:19:03,965 INFO L125 PetriNetUnfolderBase]: For 584496/584496 co-relation queries the response was YES. [2024-06-21 20:19:04,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40392 conditions, 6249 events. 3613/6249 cut-off events. For 584496/584496 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 43535 event pairs, 1108 based on Foata normal form. 1/6236 useless extension candidates. Maximal degree in co-relation 40266. Up to 5467 conditions per place. [2024-06-21 20:19:04,036 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 261 selfloop transitions, 104 changer transitions 0/374 dead transitions. [2024-06-21 20:19:04,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 374 transitions, 5264 flow [2024-06-21 20:19:04,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:19:04,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:19:04,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 20:19:04,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-21 20:19:04,037 INFO L175 Difference]: Start difference. First operand has 263 places, 359 transitions, 4276 flow. Second operand 7 states and 175 transitions. [2024-06-21 20:19:04,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 374 transitions, 5264 flow [2024-06-21 20:19:05,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 374 transitions, 4889 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 20:19:05,854 INFO L231 Difference]: Finished difference. Result has 263 places, 362 transitions, 4167 flow [2024-06-21 20:19:05,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3913, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4167, PETRI_PLACES=263, PETRI_TRANSITIONS=362} [2024-06-21 20:19:05,854 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 220 predicate places. [2024-06-21 20:19:05,854 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 362 transitions, 4167 flow [2024-06-21 20:19:05,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:05,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:05,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:19:05,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 20:19:05,855 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:19:05,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:05,855 INFO L85 PathProgramCache]: Analyzing trace with hash 2100307012, now seen corresponding path program 8 times [2024-06-21 20:19:05,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:05,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480431360] [2024-06-21 20:19:05,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:05,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:05,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:19:05,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:19:05,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:19:05,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480431360] [2024-06-21 20:19:05,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480431360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:19:05,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:19:05,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:19:05,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236774846] [2024-06-21 20:19:05,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:19:05,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:19:05,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:19:05,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:19:05,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:19:05,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:19:05,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 362 transitions, 4167 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:05,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:19:05,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:19:05,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:06,824 INFO L124 PetriNetUnfolderBase]: 3610/6249 cut-off events. [2024-06-21 20:19:06,824 INFO L125 PetriNetUnfolderBase]: For 590582/590582 co-relation queries the response was YES. [2024-06-21 20:19:06,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40312 conditions, 6249 events. 3610/6249 cut-off events. For 590582/590582 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 43578 event pairs, 1103 based on Foata normal form. 1/6236 useless extension candidates. Maximal degree in co-relation 40186. Up to 5464 conditions per place. [2024-06-21 20:19:06,898 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 266 selfloop transitions, 101 changer transitions 0/376 dead transitions. [2024-06-21 20:19:06,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 376 transitions, 5113 flow [2024-06-21 20:19:06,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:19:06,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:19:06,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-21 20:19:06,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5687830687830688 [2024-06-21 20:19:06,899 INFO L175 Difference]: Start difference. First operand has 263 places, 362 transitions, 4167 flow. Second operand 9 states and 215 transitions. [2024-06-21 20:19:06,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 376 transitions, 5113 flow [2024-06-21 20:19:08,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 376 transitions, 4956 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 20:19:08,580 INFO L231 Difference]: Finished difference. Result has 268 places, 362 transitions, 4218 flow [2024-06-21 20:19:08,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4010, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4218, PETRI_PLACES=268, PETRI_TRANSITIONS=362} [2024-06-21 20:19:08,580 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-21 20:19:08,580 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 362 transitions, 4218 flow [2024-06-21 20:19:08,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:08,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:08,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:19:08,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 20:19:08,581 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:19:08,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:08,581 INFO L85 PathProgramCache]: Analyzing trace with hash -386748126, now seen corresponding path program 9 times [2024-06-21 20:19:08,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:08,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789497648] [2024-06-21 20:19:08,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:08,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:08,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:19:08,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:19:08,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:19:08,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789497648] [2024-06-21 20:19:08,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789497648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:19:08,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:19:08,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:19:08,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866724747] [2024-06-21 20:19:08,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:19:08,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:19:08,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:19:08,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:19:08,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:19:08,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:19:08,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 362 transitions, 4218 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:08,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:19:08,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:19:08,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:09,562 INFO L124 PetriNetUnfolderBase]: 3607/6245 cut-off events. [2024-06-21 20:19:09,563 INFO L125 PetriNetUnfolderBase]: For 599720/599720 co-relation queries the response was YES. [2024-06-21 20:19:09,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40342 conditions, 6245 events. 3607/6245 cut-off events. For 599720/599720 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 43535 event pairs, 1103 based on Foata normal form. 1/6232 useless extension candidates. Maximal degree in co-relation 40214. Up to 5461 conditions per place. [2024-06-21 20:19:09,635 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 265 selfloop transitions, 99 changer transitions 0/373 dead transitions. [2024-06-21 20:19:09,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 373 transitions, 4972 flow [2024-06-21 20:19:09,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:19:09,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:19:09,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-21 20:19:09,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-21 20:19:09,636 INFO L175 Difference]: Start difference. First operand has 268 places, 362 transitions, 4218 flow. Second operand 7 states and 173 transitions. [2024-06-21 20:19:09,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 373 transitions, 4972 flow [2024-06-21 20:19:11,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 373 transitions, 4572 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-06-21 20:19:11,701 INFO L231 Difference]: Finished difference. Result has 264 places, 362 transitions, 4023 flow [2024-06-21 20:19:11,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3818, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4023, PETRI_PLACES=264, PETRI_TRANSITIONS=362} [2024-06-21 20:19:11,701 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 221 predicate places. [2024-06-21 20:19:11,701 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 362 transitions, 4023 flow [2024-06-21 20:19:11,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:11,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:11,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:19:11,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 20:19:11,702 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:19:11,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:11,702 INFO L85 PathProgramCache]: Analyzing trace with hash 887014298, now seen corresponding path program 1 times [2024-06-21 20:19:11,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:11,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411926362] [2024-06-21 20:19:11,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:11,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:11,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:19:11,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:19:11,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:19:11,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411926362] [2024-06-21 20:19:11,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411926362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:19:11,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:19:11,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:19:11,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983344098] [2024-06-21 20:19:11,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:19:11,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:19:11,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:19:11,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:19:11,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:19:11,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:19:11,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 362 transitions, 4023 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:11,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:19:11,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:19:11,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:12,756 INFO L124 PetriNetUnfolderBase]: 3739/6468 cut-off events. [2024-06-21 20:19:12,756 INFO L125 PetriNetUnfolderBase]: For 727256/727256 co-relation queries the response was YES. [2024-06-21 20:19:12,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43183 conditions, 6468 events. 3739/6468 cut-off events. For 727256/727256 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 45308 event pairs, 1004 based on Foata normal form. 12/6474 useless extension candidates. Maximal degree in co-relation 43056. Up to 5319 conditions per place. [2024-06-21 20:19:12,830 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 316 selfloop transitions, 68 changer transitions 0/393 dead transitions. [2024-06-21 20:19:12,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 393 transitions, 5191 flow [2024-06-21 20:19:12,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:19:12,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:19:12,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-21 20:19:12,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292517006802721 [2024-06-21 20:19:12,831 INFO L175 Difference]: Start difference. First operand has 264 places, 362 transitions, 4023 flow. Second operand 7 states and 185 transitions. [2024-06-21 20:19:12,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 393 transitions, 5191 flow [2024-06-21 20:19:15,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 393 transitions, 4993 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 20:19:15,041 INFO L231 Difference]: Finished difference. Result has 266 places, 366 transitions, 4119 flow [2024-06-21 20:19:15,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3825, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4119, PETRI_PLACES=266, PETRI_TRANSITIONS=366} [2024-06-21 20:19:15,042 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-21 20:19:15,042 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 366 transitions, 4119 flow [2024-06-21 20:19:15,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:15,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:15,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:19:15,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 20:19:15,043 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:19:15,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:15,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1722793698, now seen corresponding path program 2 times [2024-06-21 20:19:15,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:15,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789666616] [2024-06-21 20:19:15,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:15,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:15,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:19:15,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:19:15,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:19:15,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789666616] [2024-06-21 20:19:15,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789666616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:19:15,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:19:15,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:19:15,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159258784] [2024-06-21 20:19:15,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:19:15,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:19:15,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:19:15,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:19:15,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:19:15,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:19:15,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 366 transitions, 4119 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:15,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:19:15,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:19:15,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:16,143 INFO L124 PetriNetUnfolderBase]: 3782/6564 cut-off events. [2024-06-21 20:19:16,143 INFO L125 PetriNetUnfolderBase]: For 750336/750336 co-relation queries the response was YES. [2024-06-21 20:19:16,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44068 conditions, 6564 events. 3782/6564 cut-off events. For 750336/750336 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 46368 event pairs, 1106 based on Foata normal form. 16/6574 useless extension candidates. Maximal degree in co-relation 43939. Up to 5752 conditions per place. [2024-06-21 20:19:16,227 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 313 selfloop transitions, 64 changer transitions 0/386 dead transitions. [2024-06-21 20:19:16,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 386 transitions, 4988 flow [2024-06-21 20:19:16,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:19:16,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:19:16,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-21 20:19:16,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-21 20:19:16,229 INFO L175 Difference]: Start difference. First operand has 266 places, 366 transitions, 4119 flow. Second operand 7 states and 182 transitions. [2024-06-21 20:19:16,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 386 transitions, 4988 flow [2024-06-21 20:19:18,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 386 transitions, 4881 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-21 20:19:18,373 INFO L231 Difference]: Finished difference. Result has 270 places, 368 transitions, 4214 flow [2024-06-21 20:19:18,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4014, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4214, PETRI_PLACES=270, PETRI_TRANSITIONS=368} [2024-06-21 20:19:18,374 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 227 predicate places. [2024-06-21 20:19:18,374 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 368 transitions, 4214 flow [2024-06-21 20:19:18,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:18,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:18,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:19:18,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 20:19:18,375 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:19:18,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:18,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1723149888, now seen corresponding path program 3 times [2024-06-21 20:19:18,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:18,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130783815] [2024-06-21 20:19:18,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:18,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:18,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:19:18,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:19:18,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:19:18,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130783815] [2024-06-21 20:19:18,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130783815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:19:18,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:19:18,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:19:18,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908771915] [2024-06-21 20:19:18,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:19:18,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:19:18,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:19:18,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:19:18,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:19:18,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:19:18,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 368 transitions, 4214 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:18,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:19:18,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:19:18,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:19,593 INFO L124 PetriNetUnfolderBase]: 3789/6583 cut-off events. [2024-06-21 20:19:19,594 INFO L125 PetriNetUnfolderBase]: For 725136/725136 co-relation queries the response was YES. [2024-06-21 20:19:19,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43872 conditions, 6583 events. 3789/6583 cut-off events. For 725136/725136 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 46516 event pairs, 1099 based on Foata normal form. 12/6589 useless extension candidates. Maximal degree in co-relation 43741. Up to 5677 conditions per place. [2024-06-21 20:19:19,662 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 313 selfloop transitions, 69 changer transitions 0/391 dead transitions. [2024-06-21 20:19:19,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 391 transitions, 5109 flow [2024-06-21 20:19:19,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:19:19,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:19:19,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-21 20:19:19,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-21 20:19:19,663 INFO L175 Difference]: Start difference. First operand has 270 places, 368 transitions, 4214 flow. Second operand 7 states and 182 transitions. [2024-06-21 20:19:19,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 391 transitions, 5109 flow [2024-06-21 20:19:21,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 391 transitions, 4950 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 20:19:21,982 INFO L231 Difference]: Finished difference. Result has 272 places, 370 transitions, 4263 flow [2024-06-21 20:19:21,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4055, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4263, PETRI_PLACES=272, PETRI_TRANSITIONS=370} [2024-06-21 20:19:21,983 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-21 20:19:21,983 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 370 transitions, 4263 flow [2024-06-21 20:19:21,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:21,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:21,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:19:21,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 20:19:21,984 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:19:21,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:21,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1635696000, now seen corresponding path program 4 times [2024-06-21 20:19:21,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:21,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436689332] [2024-06-21 20:19:21,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:21,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:21,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:19:22,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:19:22,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:19:22,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436689332] [2024-06-21 20:19:22,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436689332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:19:22,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:19:22,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:19:22,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721602712] [2024-06-21 20:19:22,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:19:22,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:19:22,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:19:22,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:19:22,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:19:22,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:19:22,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 370 transitions, 4263 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:22,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:19:22,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:19:22,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:23,111 INFO L124 PetriNetUnfolderBase]: 3845/6650 cut-off events. [2024-06-21 20:19:23,112 INFO L125 PetriNetUnfolderBase]: For 760699/760699 co-relation queries the response was YES. [2024-06-21 20:19:23,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44511 conditions, 6650 events. 3845/6650 cut-off events. For 760699/760699 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 46953 event pairs, 1175 based on Foata normal form. 16/6652 useless extension candidates. Maximal degree in co-relation 44379. Up to 5771 conditions per place. [2024-06-21 20:19:23,197 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 277 selfloop transitions, 101 changer transitions 0/387 dead transitions. [2024-06-21 20:19:23,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 387 transitions, 5129 flow [2024-06-21 20:19:23,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:19:23,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:19:23,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 20:19:23,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-21 20:19:23,198 INFO L175 Difference]: Start difference. First operand has 272 places, 370 transitions, 4263 flow. Second operand 7 states and 176 transitions. [2024-06-21 20:19:23,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 387 transitions, 5129 flow [2024-06-21 20:19:25,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 387 transitions, 4944 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-21 20:19:25,819 INFO L231 Difference]: Finished difference. Result has 274 places, 372 transitions, 4352 flow [2024-06-21 20:19:25,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4078, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4352, PETRI_PLACES=274, PETRI_TRANSITIONS=372} [2024-06-21 20:19:25,820 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 231 predicate places. [2024-06-21 20:19:25,820 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 372 transitions, 4352 flow [2024-06-21 20:19:25,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:25,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:25,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:19:25,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 20:19:25,820 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:19:25,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:25,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1635339810, now seen corresponding path program 5 times [2024-06-21 20:19:25,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:25,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422699045] [2024-06-21 20:19:25,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:25,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:25,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:19:25,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:19:25,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:19:25,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422699045] [2024-06-21 20:19:25,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422699045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:19:25,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:19:25,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:19:25,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073295111] [2024-06-21 20:19:25,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:19:25,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:19:25,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:19:25,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:19:25,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:19:25,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:19:25,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 372 transitions, 4352 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:25,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:19:25,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:19:25,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:27,031 INFO L124 PetriNetUnfolderBase]: 3964/6839 cut-off events. [2024-06-21 20:19:27,032 INFO L125 PetriNetUnfolderBase]: For 826611/826611 co-relation queries the response was YES. [2024-06-21 20:19:27,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47318 conditions, 6839 events. 3964/6839 cut-off events. For 826611/826611 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 48474 event pairs, 1196 based on Foata normal form. 12/6837 useless extension candidates. Maximal degree in co-relation 47185. Up to 5712 conditions per place. [2024-06-21 20:19:27,108 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 277 selfloop transitions, 109 changer transitions 0/395 dead transitions. [2024-06-21 20:19:27,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 395 transitions, 5512 flow [2024-06-21 20:19:27,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:19:27,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:19:27,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-21 20:19:27,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-21 20:19:27,109 INFO L175 Difference]: Start difference. First operand has 274 places, 372 transitions, 4352 flow. Second operand 7 states and 179 transitions. [2024-06-21 20:19:27,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 395 transitions, 5512 flow [2024-06-21 20:19:30,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 395 transitions, 5262 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 20:19:30,105 INFO L231 Difference]: Finished difference. Result has 276 places, 376 transitions, 4462 flow [2024-06-21 20:19:30,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4102, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4462, PETRI_PLACES=276, PETRI_TRANSITIONS=376} [2024-06-21 20:19:30,106 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-21 20:19:30,106 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 376 transitions, 4462 flow [2024-06-21 20:19:30,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:30,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:30,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:19:30,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 20:19:30,106 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:19:30,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:30,107 INFO L85 PathProgramCache]: Analyzing trace with hash 2035193310, now seen corresponding path program 6 times [2024-06-21 20:19:30,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:30,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641057994] [2024-06-21 20:19:30,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:30,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:30,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:19:30,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:19:30,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:19:30,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641057994] [2024-06-21 20:19:30,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641057994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:19:30,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:19:30,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:19:30,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642242701] [2024-06-21 20:19:30,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:19:30,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:19:30,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:19:30,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:19:30,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:19:30,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:19:30,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 376 transitions, 4462 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:30,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:19:30,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:19:30,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:31,232 INFO L124 PetriNetUnfolderBase]: 3928/6787 cut-off events. [2024-06-21 20:19:31,232 INFO L125 PetriNetUnfolderBase]: For 783944/783944 co-relation queries the response was YES. [2024-06-21 20:19:31,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45322 conditions, 6787 events. 3928/6787 cut-off events. For 783944/783944 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 48131 event pairs, 1192 based on Foata normal form. 16/6789 useless extension candidates. Maximal degree in co-relation 45188. Up to 5904 conditions per place. [2024-06-21 20:19:31,315 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 276 selfloop transitions, 106 changer transitions 0/391 dead transitions. [2024-06-21 20:19:31,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 391 transitions, 5274 flow [2024-06-21 20:19:31,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:19:31,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:19:31,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 20:19:31,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2024-06-21 20:19:31,317 INFO L175 Difference]: Start difference. First operand has 276 places, 376 transitions, 4462 flow. Second operand 7 states and 177 transitions. [2024-06-21 20:19:31,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 391 transitions, 5274 flow [2024-06-21 20:19:34,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 391 transitions, 4955 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-21 20:19:34,470 INFO L231 Difference]: Finished difference. Result has 278 places, 376 transitions, 4361 flow [2024-06-21 20:19:34,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4143, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4361, PETRI_PLACES=278, PETRI_TRANSITIONS=376} [2024-06-21 20:19:34,471 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-21 20:19:34,471 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 376 transitions, 4361 flow [2024-06-21 20:19:34,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:34,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:34,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:19:34,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 20:19:34,471 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:19:34,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:34,472 INFO L85 PathProgramCache]: Analyzing trace with hash 2049491006, now seen corresponding path program 1 times [2024-06-21 20:19:34,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:34,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137691404] [2024-06-21 20:19:34,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:34,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:34,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:19:34,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:19:34,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:19:34,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137691404] [2024-06-21 20:19:34,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137691404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:19:34,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:19:34,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:19:34,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696721571] [2024-06-21 20:19:34,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:19:34,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:19:34,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:19:34,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:19:34,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:19:34,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:19:34,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 376 transitions, 4361 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:34,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:19:34,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:19:34,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:35,644 INFO L124 PetriNetUnfolderBase]: 4014/6931 cut-off events. [2024-06-21 20:19:35,644 INFO L125 PetriNetUnfolderBase]: For 816443/816443 co-relation queries the response was YES. [2024-06-21 20:19:35,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46702 conditions, 6931 events. 4014/6931 cut-off events. For 816443/816443 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 49282 event pairs, 1195 based on Foata normal form. 12/6929 useless extension candidates. Maximal degree in co-relation 46568. Up to 5788 conditions per place. [2024-06-21 20:19:35,727 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 273 selfloop transitions, 116 changer transitions 0/398 dead transitions. [2024-06-21 20:19:35,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 398 transitions, 5499 flow [2024-06-21 20:19:35,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:19:35,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:19:35,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 20:19:35,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156462585034014 [2024-06-21 20:19:35,728 INFO L175 Difference]: Start difference. First operand has 278 places, 376 transitions, 4361 flow. Second operand 7 states and 181 transitions. [2024-06-21 20:19:35,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 398 transitions, 5499 flow [2024-06-21 20:19:38,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 398 transitions, 5262 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 20:19:38,497 INFO L231 Difference]: Finished difference. Result has 279 places, 379 transitions, 4467 flow [2024-06-21 20:19:38,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4124, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4467, PETRI_PLACES=279, PETRI_TRANSITIONS=379} [2024-06-21 20:19:38,498 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 236 predicate places. [2024-06-21 20:19:38,498 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 379 transitions, 4467 flow [2024-06-21 20:19:38,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:38,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:38,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:19:38,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 20:19:38,498 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:19:38,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:38,499 INFO L85 PathProgramCache]: Analyzing trace with hash -874916960, now seen corresponding path program 2 times [2024-06-21 20:19:38,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:38,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319057917] [2024-06-21 20:19:38,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:38,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:38,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:19:38,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:19:38,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:19:38,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319057917] [2024-06-21 20:19:38,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319057917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:19:38,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:19:38,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:19:38,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905381679] [2024-06-21 20:19:38,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:19:38,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:19:38,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:19:38,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:19:38,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:19:38,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:19:38,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 379 transitions, 4467 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:38,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:19:38,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:19:38,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:39,668 INFO L124 PetriNetUnfolderBase]: 4054/6995 cut-off events. [2024-06-21 20:19:39,668 INFO L125 PetriNetUnfolderBase]: For 836673/836673 co-relation queries the response was YES. [2024-06-21 20:19:39,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47494 conditions, 6995 events. 4054/6995 cut-off events. For 836673/836673 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 49811 event pairs, 1216 based on Foata normal form. 12/6993 useless extension candidates. Maximal degree in co-relation 47359. Up to 6030 conditions per place. [2024-06-21 20:19:39,758 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 284 selfloop transitions, 106 changer transitions 0/399 dead transitions. [2024-06-21 20:19:39,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 399 transitions, 5377 flow [2024-06-21 20:19:39,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:19:39,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:19:39,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 20:19:39,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-21 20:19:39,759 INFO L175 Difference]: Start difference. First operand has 279 places, 379 transitions, 4467 flow. Second operand 7 states and 180 transitions. [2024-06-21 20:19:39,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 399 transitions, 5377 flow [2024-06-21 20:19:42,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 399 transitions, 5184 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-21 20:19:42,352 INFO L231 Difference]: Finished difference. Result has 283 places, 381 transitions, 4565 flow [2024-06-21 20:19:42,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4274, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4565, PETRI_PLACES=283, PETRI_TRANSITIONS=381} [2024-06-21 20:19:42,352 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 240 predicate places. [2024-06-21 20:19:42,352 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 381 transitions, 4565 flow [2024-06-21 20:19:42,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:42,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:42,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:19:42,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 20:19:42,353 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:19:42,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:42,353 INFO L85 PathProgramCache]: Analyzing trace with hash -361022210, now seen corresponding path program 3 times [2024-06-21 20:19:42,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:42,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701164018] [2024-06-21 20:19:42,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:42,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:42,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:19:42,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:19:42,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:19:42,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701164018] [2024-06-21 20:19:42,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701164018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:19:42,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:19:42,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:19:42,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425161642] [2024-06-21 20:19:42,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:19:42,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:19:42,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:19:42,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:19:42,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:19:42,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:19:42,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 381 transitions, 4565 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:42,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:19:42,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:19:42,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:43,550 INFO L124 PetriNetUnfolderBase]: 4107/7094 cut-off events. [2024-06-21 20:19:43,550 INFO L125 PetriNetUnfolderBase]: For 863670/863670 co-relation queries the response was YES. [2024-06-21 20:19:43,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48824 conditions, 7094 events. 4107/7094 cut-off events. For 863670/863670 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 50660 event pairs, 1222 based on Foata normal form. 12/7092 useless extension candidates. Maximal degree in co-relation 48687. Up to 5557 conditions per place. [2024-06-21 20:19:43,643 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 269 selfloop transitions, 126 changer transitions 0/404 dead transitions. [2024-06-21 20:19:43,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 404 transitions, 5757 flow [2024-06-21 20:19:43,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:19:43,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:19:43,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 20:19:43,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-21 20:19:43,644 INFO L175 Difference]: Start difference. First operand has 283 places, 381 transitions, 4565 flow. Second operand 7 states and 180 transitions. [2024-06-21 20:19:43,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 404 transitions, 5757 flow [2024-06-21 20:19:47,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 404 transitions, 5486 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-21 20:19:47,101 INFO L231 Difference]: Finished difference. Result has 285 places, 383 transitions, 4633 flow [2024-06-21 20:19:47,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4294, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4633, PETRI_PLACES=285, PETRI_TRANSITIONS=383} [2024-06-21 20:19:47,101 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-21 20:19:47,101 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 383 transitions, 4633 flow [2024-06-21 20:19:47,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:47,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:47,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:19:47,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 20:19:47,102 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:19:47,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:47,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1479748878, now seen corresponding path program 1 times [2024-06-21 20:19:47,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:47,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014340594] [2024-06-21 20:19:47,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:47,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:47,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:19:47,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:19:47,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:19:47,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014340594] [2024-06-21 20:19:47,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014340594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:19:47,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:19:47,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:19:47,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512191579] [2024-06-21 20:19:47,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:19:47,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:19:47,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:19:47,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:19:47,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:19:47,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:19:47,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 383 transitions, 4633 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:47,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:19:47,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:19:47,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:48,277 INFO L124 PetriNetUnfolderBase]: 4115/7134 cut-off events. [2024-06-21 20:19:48,277 INFO L125 PetriNetUnfolderBase]: For 827914/827914 co-relation queries the response was YES. [2024-06-21 20:19:48,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49104 conditions, 7134 events. 4115/7134 cut-off events. For 827914/827914 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 51047 event pairs, 1201 based on Foata normal form. 2/7132 useless extension candidates. Maximal degree in co-relation 48966. Up to 6406 conditions per place. [2024-06-21 20:19:48,368 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 354 selfloop transitions, 39 changer transitions 0/402 dead transitions. [2024-06-21 20:19:48,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 402 transitions, 5523 flow [2024-06-21 20:19:48,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:19:48,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:19:48,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-21 20:19:48,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-21 20:19:48,369 INFO L175 Difference]: Start difference. First operand has 285 places, 383 transitions, 4633 flow. Second operand 6 states and 156 transitions. [2024-06-21 20:19:48,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 402 transitions, 5523 flow [2024-06-21 20:19:51,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 402 transitions, 5323 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-21 20:19:51,635 INFO L231 Difference]: Finished difference. Result has 287 places, 385 transitions, 4582 flow [2024-06-21 20:19:51,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4433, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4582, PETRI_PLACES=287, PETRI_TRANSITIONS=385} [2024-06-21 20:19:51,636 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-21 20:19:51,636 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 385 transitions, 4582 flow [2024-06-21 20:19:51,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:51,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:51,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:19:51,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 20:19:51,636 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:19:51,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:51,637 INFO L85 PathProgramCache]: Analyzing trace with hash -474472802, now seen corresponding path program 2 times [2024-06-21 20:19:51,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:51,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595937352] [2024-06-21 20:19:51,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:51,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:51,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:19:51,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:19:51,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:19:51,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595937352] [2024-06-21 20:19:51,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595937352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:19:51,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:19:51,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:19:51,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889396543] [2024-06-21 20:19:51,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:19:51,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:19:51,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:19:51,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:19:51,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:19:51,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:19:51,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 385 transitions, 4582 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:51,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:19:51,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:19:51,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:52,872 INFO L124 PetriNetUnfolderBase]: 4136/7169 cut-off events. [2024-06-21 20:19:52,873 INFO L125 PetriNetUnfolderBase]: For 850832/850832 co-relation queries the response was YES. [2024-06-21 20:19:52,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49488 conditions, 7169 events. 4136/7169 cut-off events. For 850832/850832 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 51355 event pairs, 1202 based on Foata normal form. 2/7167 useless extension candidates. Maximal degree in co-relation 49349. Up to 6392 conditions per place. [2024-06-21 20:19:52,965 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 351 selfloop transitions, 45 changer transitions 0/405 dead transitions. [2024-06-21 20:19:52,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 405 transitions, 5748 flow [2024-06-21 20:19:52,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:19:52,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:19:52,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-21 20:19:52,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-21 20:19:52,966 INFO L175 Difference]: Start difference. First operand has 287 places, 385 transitions, 4582 flow. Second operand 6 states and 153 transitions. [2024-06-21 20:19:52,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 405 transitions, 5748 flow [2024-06-21 20:19:56,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 405 transitions, 5621 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-21 20:19:56,264 INFO L231 Difference]: Finished difference. Result has 289 places, 389 transitions, 4687 flow [2024-06-21 20:19:56,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4455, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4687, PETRI_PLACES=289, PETRI_TRANSITIONS=389} [2024-06-21 20:19:56,265 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-21 20:19:56,265 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 389 transitions, 4687 flow [2024-06-21 20:19:56,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:56,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:19:56,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:19:56,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 20:19:56,265 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:19:56,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:19:56,266 INFO L85 PathProgramCache]: Analyzing trace with hash 965290846, now seen corresponding path program 3 times [2024-06-21 20:19:56,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:19:56,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470290082] [2024-06-21 20:19:56,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:19:56,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:19:56,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:19:56,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:19:56,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:19:56,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470290082] [2024-06-21 20:19:56,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470290082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:19:56,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:19:56,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:19:56,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455911766] [2024-06-21 20:19:56,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:19:56,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:19:56,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:19:56,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:19:56,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:19:56,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:19:56,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 389 transitions, 4687 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:19:56,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:19:56,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:19:56,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:19:57,504 INFO L124 PetriNetUnfolderBase]: 4131/7161 cut-off events. [2024-06-21 20:19:57,504 INFO L125 PetriNetUnfolderBase]: For 856187/856187 co-relation queries the response was YES. [2024-06-21 20:19:57,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49336 conditions, 7161 events. 4131/7161 cut-off events. For 856187/856187 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 51273 event pairs, 1199 based on Foata normal form. 2/7156 useless extension candidates. Maximal degree in co-relation 49196. Up to 6430 conditions per place. [2024-06-21 20:19:57,592 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 360 selfloop transitions, 40 changer transitions 0/409 dead transitions. [2024-06-21 20:19:57,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 409 transitions, 5537 flow [2024-06-21 20:19:57,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:19:57,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:19:57,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-21 20:19:57,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-06-21 20:19:57,593 INFO L175 Difference]: Start difference. First operand has 289 places, 389 transitions, 4687 flow. Second operand 6 states and 159 transitions. [2024-06-21 20:19:57,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 409 transitions, 5537 flow [2024-06-21 20:20:01,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 409 transitions, 5395 flow, removed 50 selfloop flow, removed 2 redundant places. [2024-06-21 20:20:01,209 INFO L231 Difference]: Finished difference. Result has 293 places, 389 transitions, 4630 flow [2024-06-21 20:20:01,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4545, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4630, PETRI_PLACES=293, PETRI_TRANSITIONS=389} [2024-06-21 20:20:01,210 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 250 predicate places. [2024-06-21 20:20:01,210 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 389 transitions, 4630 flow [2024-06-21 20:20:01,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:20:01,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:20:01,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:20:01,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 20:20:01,211 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:20:01,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:20:01,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1250681054, now seen corresponding path program 4 times [2024-06-21 20:20:01,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:20:01,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746224570] [2024-06-21 20:20:01,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:20:01,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:20:01,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:20:01,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:20:01,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:20:01,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746224570] [2024-06-21 20:20:01,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746224570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:20:01,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:20:01,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:20:01,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351807100] [2024-06-21 20:20:01,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:20:01,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:20:01,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:20:01,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:20:01,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:20:01,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:20:01,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 389 transitions, 4630 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:20:01,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:20:01,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:20:01,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:20:02,403 INFO L124 PetriNetUnfolderBase]: 4139/7173 cut-off events. [2024-06-21 20:20:02,403 INFO L125 PetriNetUnfolderBase]: For 871315/871315 co-relation queries the response was YES. [2024-06-21 20:20:02,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49606 conditions, 7173 events. 4139/7173 cut-off events. For 871315/871315 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 51401 event pairs, 1195 based on Foata normal form. 2/7168 useless extension candidates. Maximal degree in co-relation 49464. Up to 6416 conditions per place. [2024-06-21 20:20:02,497 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 357 selfloop transitions, 43 changer transitions 0/409 dead transitions. [2024-06-21 20:20:02,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 409 transitions, 5544 flow [2024-06-21 20:20:02,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:20:02,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:20:02,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-21 20:20:02,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6150793650793651 [2024-06-21 20:20:02,498 INFO L175 Difference]: Start difference. First operand has 293 places, 389 transitions, 4630 flow. Second operand 6 states and 155 transitions. [2024-06-21 20:20:02,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 409 transitions, 5544 flow [2024-06-21 20:20:06,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 409 transitions, 5441 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 20:20:06,707 INFO L231 Difference]: Finished difference. Result has 294 places, 391 transitions, 4692 flow [2024-06-21 20:20:06,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4527, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4692, PETRI_PLACES=294, PETRI_TRANSITIONS=391} [2024-06-21 20:20:06,708 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-21 20:20:06,708 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 391 transitions, 4692 flow [2024-06-21 20:20:06,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:20:06,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:20:06,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:20:06,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 20:20:06,708 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:20:06,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:20:06,708 INFO L85 PathProgramCache]: Analyzing trace with hash -449911168, now seen corresponding path program 5 times [2024-06-21 20:20:06,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:20:06,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144860979] [2024-06-21 20:20:06,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:20:06,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:20:06,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:20:06,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:20:06,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:20:06,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144860979] [2024-06-21 20:20:06,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144860979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:20:06,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:20:06,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:20:06,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305294970] [2024-06-21 20:20:06,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:20:06,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:20:06,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:20:06,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:20:06,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:20:06,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:20:06,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 391 transitions, 4692 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:20:06,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:20:06,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:20:06,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:20:07,967 INFO L124 PetriNetUnfolderBase]: 4147/7187 cut-off events. [2024-06-21 20:20:07,967 INFO L125 PetriNetUnfolderBase]: For 889813/889813 co-relation queries the response was YES. [2024-06-21 20:20:08,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49959 conditions, 7187 events. 4147/7187 cut-off events. For 889813/889813 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 51604 event pairs, 1181 based on Foata normal form. 2/7180 useless extension candidates. Maximal degree in co-relation 49816. Up to 6317 conditions per place. [2024-06-21 20:20:08,061 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 347 selfloop transitions, 52 changer transitions 0/408 dead transitions. [2024-06-21 20:20:08,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 408 transitions, 5847 flow [2024-06-21 20:20:08,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:20:08,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:20:08,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-21 20:20:08,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-21 20:20:08,063 INFO L175 Difference]: Start difference. First operand has 294 places, 391 transitions, 4692 flow. Second operand 6 states and 149 transitions. [2024-06-21 20:20:08,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 408 transitions, 5847 flow [2024-06-21 20:20:11,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 408 transitions, 5704 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-21 20:20:11,749 INFO L231 Difference]: Finished difference. Result has 296 places, 394 transitions, 4775 flow [2024-06-21 20:20:11,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4549, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4775, PETRI_PLACES=296, PETRI_TRANSITIONS=394} [2024-06-21 20:20:11,749 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-21 20:20:11,749 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 394 transitions, 4775 flow [2024-06-21 20:20:11,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:20:11,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:20:11,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:20:11,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 20:20:11,750 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:20:11,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:20:11,750 INFO L85 PathProgramCache]: Analyzing trace with hash -470304464, now seen corresponding path program 6 times [2024-06-21 20:20:11,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:20:11,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986332297] [2024-06-21 20:20:11,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:20:11,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:20:11,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:20:11,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:20:11,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:20:11,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986332297] [2024-06-21 20:20:11,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986332297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:20:11,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:20:11,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:20:11,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862225842] [2024-06-21 20:20:11,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:20:11,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:20:11,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:20:11,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:20:11,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:20:11,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:20:11,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 394 transitions, 4775 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:20:11,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:20:11,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:20:11,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:20:13,005 INFO L124 PetriNetUnfolderBase]: 4142/7180 cut-off events. [2024-06-21 20:20:13,005 INFO L125 PetriNetUnfolderBase]: For 894397/894397 co-relation queries the response was YES. [2024-06-21 20:20:13,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49796 conditions, 7180 events. 4142/7180 cut-off events. For 894397/894397 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 51611 event pairs, 1181 based on Foata normal form. 2/7173 useless extension candidates. Maximal degree in co-relation 49652. Up to 6313 conditions per place. [2024-06-21 20:20:13,090 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 345 selfloop transitions, 53 changer transitions 0/407 dead transitions. [2024-06-21 20:20:13,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 407 transitions, 5601 flow [2024-06-21 20:20:13,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:20:13,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:20:13,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-21 20:20:13,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-21 20:20:13,091 INFO L175 Difference]: Start difference. First operand has 296 places, 394 transitions, 4775 flow. Second operand 6 states and 148 transitions. [2024-06-21 20:20:13,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 407 transitions, 5601 flow [2024-06-21 20:20:16,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 407 transitions, 5400 flow, removed 61 selfloop flow, removed 3 redundant places. [2024-06-21 20:20:16,385 INFO L231 Difference]: Finished difference. Result has 299 places, 394 transitions, 4685 flow [2024-06-21 20:20:16,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4574, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4685, PETRI_PLACES=299, PETRI_TRANSITIONS=394} [2024-06-21 20:20:16,385 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-21 20:20:16,385 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 394 transitions, 4685 flow [2024-06-21 20:20:16,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:20:16,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:20:16,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:20:16,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 20:20:16,386 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:20:16,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:20:16,386 INFO L85 PathProgramCache]: Analyzing trace with hash -883442012, now seen corresponding path program 1 times [2024-06-21 20:20:16,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:20:16,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275394165] [2024-06-21 20:20:16,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:20:16,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:20:16,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:20:16,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:20:16,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:20:16,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275394165] [2024-06-21 20:20:16,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275394165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:20:16,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:20:16,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:20:16,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921418496] [2024-06-21 20:20:16,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:20:16,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:20:16,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:20:16,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:20:16,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:20:16,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:20:16,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 394 transitions, 4685 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:20:16,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:20:16,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:20:16,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:20:17,702 INFO L124 PetriNetUnfolderBase]: 4340/7504 cut-off events. [2024-06-21 20:20:17,702 INFO L125 PetriNetUnfolderBase]: For 1119503/1119503 co-relation queries the response was YES. [2024-06-21 20:20:17,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55044 conditions, 7504 events. 4340/7504 cut-off events. For 1119503/1119503 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 54117 event pairs, 1059 based on Foata normal form. 12/7512 useless extension candidates. Maximal degree in co-relation 54899. Up to 5948 conditions per place. [2024-06-21 20:20:17,800 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 333 selfloop transitions, 93 changer transitions 0/435 dead transitions. [2024-06-21 20:20:17,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 435 transitions, 6325 flow [2024-06-21 20:20:17,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:20:17,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:20:17,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2024-06-21 20:20:17,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6216931216931217 [2024-06-21 20:20:17,802 INFO L175 Difference]: Start difference. First operand has 299 places, 394 transitions, 4685 flow. Second operand 9 states and 235 transitions. [2024-06-21 20:20:17,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 435 transitions, 6325 flow [2024-06-21 20:20:21,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 435 transitions, 6204 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 20:20:21,223 INFO L231 Difference]: Finished difference. Result has 304 places, 399 transitions, 4939 flow [2024-06-21 20:20:21,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4564, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4939, PETRI_PLACES=304, PETRI_TRANSITIONS=399} [2024-06-21 20:20:21,224 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-21 20:20:21,224 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 399 transitions, 4939 flow [2024-06-21 20:20:21,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:20:21,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:20:21,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:20:21,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 20:20:21,224 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:20:21,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:20:21,225 INFO L85 PathProgramCache]: Analyzing trace with hash -637524926, now seen corresponding path program 2 times [2024-06-21 20:20:21,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:20:21,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551680643] [2024-06-21 20:20:21,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:20:21,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:20:21,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:20:21,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:20:21,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:20:21,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551680643] [2024-06-21 20:20:21,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551680643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:20:21,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:20:21,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:20:21,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369617321] [2024-06-21 20:20:21,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:20:21,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:20:21,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:20:21,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:20:21,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:20:21,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:20:21,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 399 transitions, 4939 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:20:21,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:20:21,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:20:21,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:20:22,619 INFO L124 PetriNetUnfolderBase]: 4387/7602 cut-off events. [2024-06-21 20:20:22,619 INFO L125 PetriNetUnfolderBase]: For 1144741/1144741 co-relation queries the response was YES. [2024-06-21 20:20:22,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56293 conditions, 7602 events. 4387/7602 cut-off events. For 1144741/1144741 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 55071 event pairs, 1276 based on Foata normal form. 12/7610 useless extension candidates. Maximal degree in co-relation 56146. Up to 6472 conditions per place. [2024-06-21 20:20:22,744 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 338 selfloop transitions, 82 changer transitions 0/429 dead transitions. [2024-06-21 20:20:22,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 429 transitions, 6223 flow [2024-06-21 20:20:22,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:20:22,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:20:22,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-21 20:20:22,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6160714285714286 [2024-06-21 20:20:22,745 INFO L175 Difference]: Start difference. First operand has 304 places, 399 transitions, 4939 flow. Second operand 8 states and 207 transitions. [2024-06-21 20:20:22,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 429 transitions, 6223 flow [2024-06-21 20:20:26,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 429 transitions, 6058 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-21 20:20:26,031 INFO L231 Difference]: Finished difference. Result has 309 places, 402 transitions, 5078 flow [2024-06-21 20:20:26,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4776, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5078, PETRI_PLACES=309, PETRI_TRANSITIONS=402} [2024-06-21 20:20:26,031 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-21 20:20:26,031 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 402 transitions, 5078 flow [2024-06-21 20:20:26,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:20:26,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:20:26,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:20:26,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 20:20:26,032 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:20:26,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:20:26,032 INFO L85 PathProgramCache]: Analyzing trace with hash 319267840, now seen corresponding path program 3 times [2024-06-21 20:20:26,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:20:26,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704871795] [2024-06-21 20:20:26,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:20:26,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:20:26,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:20:26,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:20:26,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:20:26,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704871795] [2024-06-21 20:20:26,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704871795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:20:26,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:20:26,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:20:26,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329242447] [2024-06-21 20:20:26,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:20:26,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:20:26,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:20:26,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:20:26,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:20:26,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:20:26,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 402 transitions, 5078 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:20:26,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:20:26,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:20:26,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:20:27,517 INFO L124 PetriNetUnfolderBase]: 4397/7620 cut-off events. [2024-06-21 20:20:27,518 INFO L125 PetriNetUnfolderBase]: For 1148058/1148058 co-relation queries the response was YES. [2024-06-21 20:20:27,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55736 conditions, 7620 events. 4397/7620 cut-off events. For 1148058/1148058 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 55221 event pairs, 1287 based on Foata normal form. 16/7632 useless extension candidates. Maximal degree in co-relation 55586. Up to 6648 conditions per place. [2024-06-21 20:20:27,605 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 332 selfloop transitions, 85 changer transitions 0/426 dead transitions. [2024-06-21 20:20:27,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 426 transitions, 6039 flow [2024-06-21 20:20:27,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:20:27,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:20:27,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-21 20:20:27,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-21 20:20:27,606 INFO L175 Difference]: Start difference. First operand has 309 places, 402 transitions, 5078 flow. Second operand 8 states and 204 transitions. [2024-06-21 20:20:27,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 426 transitions, 6039 flow [2024-06-21 20:20:31,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 426 transitions, 5738 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-21 20:20:31,772 INFO L231 Difference]: Finished difference. Result has 310 places, 404 transitions, 5018 flow [2024-06-21 20:20:31,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4781, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5018, PETRI_PLACES=310, PETRI_TRANSITIONS=404} [2024-06-21 20:20:31,772 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 267 predicate places. [2024-06-21 20:20:31,772 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 404 transitions, 5018 flow [2024-06-21 20:20:31,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:20:31,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:20:31,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:20:31,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 20:20:31,773 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:20:31,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:20:31,773 INFO L85 PathProgramCache]: Analyzing trace with hash -529030820, now seen corresponding path program 4 times [2024-06-21 20:20:31,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:20:31,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811967743] [2024-06-21 20:20:31,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:20:31,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:20:31,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:20:31,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:20:31,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:20:31,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811967743] [2024-06-21 20:20:31,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811967743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:20:31,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:20:31,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:20:31,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745619274] [2024-06-21 20:20:31,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:20:31,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:20:31,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:20:31,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:20:31,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:20:31,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:20:31,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 404 transitions, 5018 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:20:31,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:20:31,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:20:31,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:20:33,115 INFO L124 PetriNetUnfolderBase]: 4453/7696 cut-off events. [2024-06-21 20:20:33,116 INFO L125 PetriNetUnfolderBase]: For 1167720/1167720 co-relation queries the response was YES. [2024-06-21 20:20:33,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55836 conditions, 7696 events. 4453/7696 cut-off events. For 1167720/1167720 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 55887 event pairs, 1332 based on Foata normal form. 16/7694 useless extension candidates. Maximal degree in co-relation 55686. Up to 6736 conditions per place. [2024-06-21 20:20:33,226 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 321 selfloop transitions, 91 changer transitions 0/421 dead transitions. [2024-06-21 20:20:33,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 421 transitions, 5950 flow [2024-06-21 20:20:33,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:20:33,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:20:33,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 20:20:33,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2024-06-21 20:20:33,227 INFO L175 Difference]: Start difference. First operand has 310 places, 404 transitions, 5018 flow. Second operand 7 states and 177 transitions. [2024-06-21 20:20:33,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 421 transitions, 5950 flow [2024-06-21 20:20:38,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 421 transitions, 5740 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 20:20:38,125 INFO L231 Difference]: Finished difference. Result has 311 places, 406 transitions, 5060 flow [2024-06-21 20:20:38,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4808, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5060, PETRI_PLACES=311, PETRI_TRANSITIONS=406} [2024-06-21 20:20:38,125 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-21 20:20:38,125 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 406 transitions, 5060 flow [2024-06-21 20:20:38,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:20:38,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:20:38,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:20:38,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 20:20:38,126 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:20:38,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:20:38,126 INFO L85 PathProgramCache]: Analyzing trace with hash -675823550, now seen corresponding path program 5 times [2024-06-21 20:20:38,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:20:38,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782531073] [2024-06-21 20:20:38,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:20:38,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:20:38,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:20:38,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:20:38,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:20:38,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782531073] [2024-06-21 20:20:38,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782531073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:20:38,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:20:38,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:20:38,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507783834] [2024-06-21 20:20:38,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:20:38,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:20:38,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:20:38,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:20:38,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:20:38,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:20:38,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 406 transitions, 5060 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:20:38,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:20:38,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:20:38,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:20:39,495 INFO L124 PetriNetUnfolderBase]: 4509/7792 cut-off events. [2024-06-21 20:20:39,495 INFO L125 PetriNetUnfolderBase]: For 1186094/1186094 co-relation queries the response was YES. [2024-06-21 20:20:39,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56461 conditions, 7792 events. 4509/7792 cut-off events. For 1186094/1186094 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 56696 event pairs, 1346 based on Foata normal form. 16/7790 useless extension candidates. Maximal degree in co-relation 56310. Up to 6824 conditions per place. [2024-06-21 20:20:39,608 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 331 selfloop transitions, 83 changer transitions 0/423 dead transitions. [2024-06-21 20:20:39,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 423 transitions, 6000 flow [2024-06-21 20:20:39,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:20:39,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:20:39,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 20:20:39,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-21 20:20:39,610 INFO L175 Difference]: Start difference. First operand has 311 places, 406 transitions, 5060 flow. Second operand 7 states and 176 transitions. [2024-06-21 20:20:39,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 423 transitions, 6000 flow [2024-06-21 20:20:44,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 423 transitions, 5770 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 20:20:44,232 INFO L231 Difference]: Finished difference. Result has 313 places, 408 transitions, 5070 flow [2024-06-21 20:20:44,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4830, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5070, PETRI_PLACES=313, PETRI_TRANSITIONS=408} [2024-06-21 20:20:44,233 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-21 20:20:44,233 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 408 transitions, 5070 flow [2024-06-21 20:20:44,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:20:44,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:20:44,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:20:44,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 20:20:44,233 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:20:44,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:20:44,234 INFO L85 PathProgramCache]: Analyzing trace with hash -675971420, now seen corresponding path program 6 times [2024-06-21 20:20:44,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:20:44,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223384746] [2024-06-21 20:20:44,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:20:44,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:20:44,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:20:44,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:20:44,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:20:44,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223384746] [2024-06-21 20:20:44,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223384746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:20:44,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:20:44,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:20:44,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32570626] [2024-06-21 20:20:44,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:20:44,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:20:44,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:20:44,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:20:44,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:20:44,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:20:44,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 408 transitions, 5070 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:20:44,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:20:44,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:20:44,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:20:45,633 INFO L124 PetriNetUnfolderBase]: 4576/7891 cut-off events. [2024-06-21 20:20:45,633 INFO L125 PetriNetUnfolderBase]: For 1209121/1209121 co-relation queries the response was YES. [2024-06-21 20:20:45,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57629 conditions, 7891 events. 4576/7891 cut-off events. For 1209121/1209121 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 57446 event pairs, 1340 based on Foata normal form. 12/7885 useless extension candidates. Maximal degree in co-relation 57477. Up to 6691 conditions per place. [2024-06-21 20:20:45,736 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 339 selfloop transitions, 83 changer transitions 0/431 dead transitions. [2024-06-21 20:20:45,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 431 transitions, 6364 flow [2024-06-21 20:20:45,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:20:45,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:20:45,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-21 20:20:45,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-21 20:20:45,737 INFO L175 Difference]: Start difference. First operand has 313 places, 408 transitions, 5070 flow. Second operand 7 states and 179 transitions. [2024-06-21 20:20:45,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 431 transitions, 6364 flow [2024-06-21 20:20:49,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 431 transitions, 6148 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-21 20:20:49,681 INFO L231 Difference]: Finished difference. Result has 316 places, 412 transitions, 5210 flow [2024-06-21 20:20:49,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4854, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5210, PETRI_PLACES=316, PETRI_TRANSITIONS=412} [2024-06-21 20:20:49,682 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 273 predicate places. [2024-06-21 20:20:49,682 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 412 transitions, 5210 flow [2024-06-21 20:20:49,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:20:49,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:20:49,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:20:49,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 20:20:49,683 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:20:49,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:20:49,683 INFO L85 PathProgramCache]: Analyzing trace with hash -468897248, now seen corresponding path program 1 times [2024-06-21 20:20:49,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:20:49,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293401273] [2024-06-21 20:20:49,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:20:49,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:20:49,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:20:49,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:20:49,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:20:49,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293401273] [2024-06-21 20:20:49,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293401273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:20:49,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:20:49,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:20:49,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172742287] [2024-06-21 20:20:49,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:20:49,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:20:49,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:20:49,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:20:49,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:20:49,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:20:49,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 412 transitions, 5210 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:20:49,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:20:49,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:20:49,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:20:51,242 INFO L124 PetriNetUnfolderBase]: 4616/7977 cut-off events. [2024-06-21 20:20:51,242 INFO L125 PetriNetUnfolderBase]: For 1235234/1235234 co-relation queries the response was YES. [2024-06-21 20:20:51,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58196 conditions, 7977 events. 4616/7977 cut-off events. For 1235234/1235234 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 58249 event pairs, 1323 based on Foata normal form. 12/7971 useless extension candidates. Maximal degree in co-relation 58042. Up to 6797 conditions per place. [2024-06-21 20:20:51,340 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 323 selfloop transitions, 100 changer transitions 0/432 dead transitions. [2024-06-21 20:20:51,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 432 transitions, 6188 flow [2024-06-21 20:20:51,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:20:51,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:20:51,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 20:20:51,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-21 20:20:51,341 INFO L175 Difference]: Start difference. First operand has 316 places, 412 transitions, 5210 flow. Second operand 7 states and 180 transitions. [2024-06-21 20:20:51,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 432 transitions, 6188 flow [2024-06-21 20:20:55,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 432 transitions, 6013 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-21 20:20:55,655 INFO L231 Difference]: Finished difference. Result has 320 places, 414 transitions, 5316 flow [2024-06-21 20:20:55,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5035, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5316, PETRI_PLACES=320, PETRI_TRANSITIONS=414} [2024-06-21 20:20:55,656 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-21 20:20:55,656 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 414 transitions, 5316 flow [2024-06-21 20:20:55,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:20:55,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:20:55,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:20:55,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 20:20:55,657 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:20:55,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:20:55,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1288097676, now seen corresponding path program 7 times [2024-06-21 20:20:55,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:20:55,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509952541] [2024-06-21 20:20:55,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:20:55,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:20:55,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:20:55,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:20:55,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:20:55,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509952541] [2024-06-21 20:20:55,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509952541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:20:55,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:20:55,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:20:55,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444561672] [2024-06-21 20:20:55,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:20:55,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:20:55,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:20:55,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:20:55,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:20:55,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:20:55,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 414 transitions, 5316 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:20:55,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:20:55,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:20:55,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:20:57,145 INFO L124 PetriNetUnfolderBase]: 4656/8038 cut-off events. [2024-06-21 20:20:57,145 INFO L125 PetriNetUnfolderBase]: For 1251916/1251916 co-relation queries the response was YES. [2024-06-21 20:20:57,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58597 conditions, 8038 events. 4656/8038 cut-off events. For 1251916/1251916 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 58675 event pairs, 1142 based on Foata normal form. 12/8046 useless extension candidates. Maximal degree in co-relation 58441. Up to 6704 conditions per place. [2024-06-21 20:20:57,253 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 341 selfloop transitions, 92 changer transitions 2/444 dead transitions. [2024-06-21 20:20:57,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 444 transitions, 6529 flow [2024-06-21 20:20:57,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:20:57,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:20:57,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-21 20:20:57,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-21 20:20:57,255 INFO L175 Difference]: Start difference. First operand has 320 places, 414 transitions, 5316 flow. Second operand 7 states and 189 transitions. [2024-06-21 20:20:57,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 444 transitions, 6529 flow [2024-06-21 20:21:00,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 444 transitions, 6268 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-21 20:21:00,899 INFO L231 Difference]: Finished difference. Result has 322 places, 414 transitions, 5258 flow [2024-06-21 20:21:00,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5055, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5258, PETRI_PLACES=322, PETRI_TRANSITIONS=414} [2024-06-21 20:21:00,900 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-21 20:21:00,900 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 414 transitions, 5258 flow [2024-06-21 20:21:00,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:21:00,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:21:00,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:21:00,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 20:21:00,901 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:21:00,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:21:00,901 INFO L85 PathProgramCache]: Analyzing trace with hash -681390176, now seen corresponding path program 8 times [2024-06-21 20:21:00,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:21:00,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974679094] [2024-06-21 20:21:00,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:21:00,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:21:00,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:21:01,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:21:01,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:21:01,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974679094] [2024-06-21 20:21:01,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974679094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:21:01,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:21:01,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:21:01,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918690461] [2024-06-21 20:21:01,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:21:01,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:21:01,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:21:01,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:21:01,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:21:01,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:21:01,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 414 transitions, 5258 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:21:01,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:21:01,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:21:01,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:21:02,408 INFO L124 PetriNetUnfolderBase]: 4688/8075 cut-off events. [2024-06-21 20:21:02,408 INFO L125 PetriNetUnfolderBase]: For 1297622/1297622 co-relation queries the response was YES. [2024-06-21 20:21:02,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58739 conditions, 8075 events. 4688/8075 cut-off events. For 1297622/1297622 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 58857 event pairs, 1346 based on Foata normal form. 16/8087 useless extension candidates. Maximal degree in co-relation 58582. Up to 7113 conditions per place. [2024-06-21 20:21:02,523 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 345 selfloop transitions, 81 changer transitions 2/437 dead transitions. [2024-06-21 20:21:02,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 437 transitions, 6209 flow [2024-06-21 20:21:02,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:21:02,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:21:02,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 20:21:02,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156462585034014 [2024-06-21 20:21:02,525 INFO L175 Difference]: Start difference. First operand has 322 places, 414 transitions, 5258 flow. Second operand 7 states and 181 transitions. [2024-06-21 20:21:02,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 437 transitions, 6209 flow [2024-06-21 20:21:06,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 437 transitions, 6047 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 20:21:06,908 INFO L231 Difference]: Finished difference. Result has 325 places, 414 transitions, 5276 flow [2024-06-21 20:21:06,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5097, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5276, PETRI_PLACES=325, PETRI_TRANSITIONS=414} [2024-06-21 20:21:06,909 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 282 predicate places. [2024-06-21 20:21:06,909 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 414 transitions, 5276 flow [2024-06-21 20:21:06,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:21:06,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:21:06,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:21:06,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 20:21:06,909 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:21:06,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:21:06,910 INFO L85 PathProgramCache]: Analyzing trace with hash -482088386, now seen corresponding path program 9 times [2024-06-21 20:21:06,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:21:06,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776565735] [2024-06-21 20:21:06,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:21:06,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:21:06,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:21:06,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:21:06,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:21:06,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776565735] [2024-06-21 20:21:06,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776565735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:21:06,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:21:06,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:21:06,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032932859] [2024-06-21 20:21:06,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:21:06,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:21:06,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:21:06,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:21:06,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:21:07,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:21:07,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 414 transitions, 5276 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:21:07,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:21:07,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:21:07,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:21:08,427 INFO L124 PetriNetUnfolderBase]: 4711/8110 cut-off events. [2024-06-21 20:21:08,427 INFO L125 PetriNetUnfolderBase]: For 1320058/1320058 co-relation queries the response was YES. [2024-06-21 20:21:08,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59035 conditions, 8110 events. 4711/8110 cut-off events. For 1320058/1320058 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 59120 event pairs, 1350 based on Foata normal form. 16/8122 useless extension candidates. Maximal degree in co-relation 58877. Up to 7153 conditions per place. [2024-06-21 20:21:08,538 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 343 selfloop transitions, 81 changer transitions 1/434 dead transitions. [2024-06-21 20:21:08,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 434 transitions, 6216 flow [2024-06-21 20:21:08,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:21:08,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:21:08,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 20:21:08,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6054421768707483 [2024-06-21 20:21:08,539 INFO L175 Difference]: Start difference. First operand has 325 places, 414 transitions, 5276 flow. Second operand 7 states and 178 transitions. [2024-06-21 20:21:08,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 434 transitions, 6216 flow [2024-06-21 20:21:12,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 434 transitions, 6051 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 20:21:12,613 INFO L231 Difference]: Finished difference. Result has 327 places, 415 transitions, 5300 flow [2024-06-21 20:21:12,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5111, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5300, PETRI_PLACES=327, PETRI_TRANSITIONS=415} [2024-06-21 20:21:12,613 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 284 predicate places. [2024-06-21 20:21:12,613 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 415 transitions, 5300 flow [2024-06-21 20:21:12,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:21:12,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:21:12,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:21:12,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 20:21:12,614 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:21:12,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:21:12,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1201765852, now seen corresponding path program 10 times [2024-06-21 20:21:12,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:21:12,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032745303] [2024-06-21 20:21:12,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:21:12,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:21:12,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:21:12,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:21:12,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:21:12,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032745303] [2024-06-21 20:21:12,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032745303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:21:12,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:21:12,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:21:12,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775753251] [2024-06-21 20:21:12,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:21:12,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:21:12,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:21:12,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:21:12,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:21:12,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:21:12,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 415 transitions, 5300 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:21:12,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:21:12,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:21:12,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:21:14,130 INFO L124 PetriNetUnfolderBase]: 4627/7949 cut-off events. [2024-06-21 20:21:14,130 INFO L125 PetriNetUnfolderBase]: For 1231526/1231526 co-relation queries the response was YES. [2024-06-21 20:21:14,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56647 conditions, 7949 events. 4627/7949 cut-off events. For 1231526/1231526 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 57780 event pairs, 1331 based on Foata normal form. 16/7952 useless extension candidates. Maximal degree in co-relation 56488. Up to 7021 conditions per place. [2024-06-21 20:21:14,232 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 334 selfloop transitions, 86 changer transitions 1/430 dead transitions. [2024-06-21 20:21:14,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 430 transitions, 6190 flow [2024-06-21 20:21:14,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:21:14,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:21:14,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-21 20:21:14,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-21 20:21:14,233 INFO L175 Difference]: Start difference. First operand has 327 places, 415 transitions, 5300 flow. Second operand 7 states and 173 transitions. [2024-06-21 20:21:14,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 430 transitions, 6190 flow [2024-06-21 20:21:18,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 430 transitions, 6021 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 20:21:18,881 INFO L231 Difference]: Finished difference. Result has 329 places, 414 transitions, 5292 flow [2024-06-21 20:21:18,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5131, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5292, PETRI_PLACES=329, PETRI_TRANSITIONS=414} [2024-06-21 20:21:18,882 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-21 20:21:18,882 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 414 transitions, 5292 flow [2024-06-21 20:21:18,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:21:18,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:21:18,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:21:18,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 20:21:18,883 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:21:18,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:21:18,883 INFO L85 PathProgramCache]: Analyzing trace with hash -474463874, now seen corresponding path program 2 times [2024-06-21 20:21:18,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:21:18,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181806658] [2024-06-21 20:21:18,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:21:18,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:21:18,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:21:18,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:21:18,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:21:18,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181806658] [2024-06-21 20:21:18,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181806658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:21:18,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:21:18,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:21:18,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020729287] [2024-06-21 20:21:18,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:21:18,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:21:18,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:21:18,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:21:18,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:21:18,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:21:18,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 414 transitions, 5292 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:21:18,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:21:18,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:21:18,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:21:20,377 INFO L124 PetriNetUnfolderBase]: 4555/7850 cut-off events. [2024-06-21 20:21:20,377 INFO L125 PetriNetUnfolderBase]: For 1225924/1225924 co-relation queries the response was YES. [2024-06-21 20:21:20,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56652 conditions, 7850 events. 4555/7850 cut-off events. For 1225924/1225924 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 56934 event pairs, 1250 based on Foata normal form. 12/7858 useless extension candidates. Maximal degree in co-relation 56492. Up to 6817 conditions per place. [2024-06-21 20:21:20,496 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 342 selfloop transitions, 86 changer transitions 0/437 dead transitions. [2024-06-21 20:21:20,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 437 transitions, 6292 flow [2024-06-21 20:21:20,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:21:20,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:21:20,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 20:21:20,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156462585034014 [2024-06-21 20:21:20,497 INFO L175 Difference]: Start difference. First operand has 329 places, 414 transitions, 5292 flow. Second operand 7 states and 181 transitions. [2024-06-21 20:21:20,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 437 transitions, 6292 flow [2024-06-21 20:21:24,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 437 transitions, 6044 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-21 20:21:24,935 INFO L231 Difference]: Finished difference. Result has 329 places, 416 transitions, 5301 flow [2024-06-21 20:21:24,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5044, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5301, PETRI_PLACES=329, PETRI_TRANSITIONS=416} [2024-06-21 20:21:24,935 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-21 20:21:24,935 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 416 transitions, 5301 flow [2024-06-21 20:21:24,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:21:24,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:21:24,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:21:24,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 20:21:24,936 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:21:24,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:21:24,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1209390364, now seen corresponding path program 3 times [2024-06-21 20:21:24,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:21:24,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233389663] [2024-06-21 20:21:24,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:21:24,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:21:24,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:21:25,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:21:25,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:21:25,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233389663] [2024-06-21 20:21:25,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233389663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:21:25,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:21:25,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:21:25,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721519051] [2024-06-21 20:21:25,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:21:25,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:21:25,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:21:25,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:21:25,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:21:25,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:21:25,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 416 transitions, 5301 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:21:25,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:21:25,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:21:25,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:21:26,447 INFO L124 PetriNetUnfolderBase]: 4595/7905 cut-off events. [2024-06-21 20:21:26,447 INFO L125 PetriNetUnfolderBase]: For 1249873/1249873 co-relation queries the response was YES. [2024-06-21 20:21:26,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57247 conditions, 7905 events. 4595/7905 cut-off events. For 1249873/1249873 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 57472 event pairs, 1291 based on Foata normal form. 12/7904 useless extension candidates. Maximal degree in co-relation 57086. Up to 6913 conditions per place. [2024-06-21 20:21:26,556 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 337 selfloop transitions, 90 changer transitions 0/436 dead transitions. [2024-06-21 20:21:26,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 436 transitions, 6295 flow [2024-06-21 20:21:26,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:21:26,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:21:26,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 20:21:26,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2024-06-21 20:21:26,557 INFO L175 Difference]: Start difference. First operand has 329 places, 416 transitions, 5301 flow. Second operand 7 states and 177 transitions. [2024-06-21 20:21:26,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 436 transitions, 6295 flow [2024-06-21 20:21:31,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 436 transitions, 6058 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-21 20:21:31,853 INFO L231 Difference]: Finished difference. Result has 331 places, 418 transitions, 5333 flow [2024-06-21 20:21:31,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5064, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5333, PETRI_PLACES=331, PETRI_TRANSITIONS=418} [2024-06-21 20:21:31,853 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 288 predicate places. [2024-06-21 20:21:31,853 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 418 transitions, 5333 flow [2024-06-21 20:21:31,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:21:31,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:21:31,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:21:31,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 20:21:31,854 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:21:31,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:21:31,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1771250972, now seen corresponding path program 4 times [2024-06-21 20:21:31,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:21:31,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558055585] [2024-06-21 20:21:31,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:21:31,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:21:31,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:21:31,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:21:31,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:21:31,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558055585] [2024-06-21 20:21:31,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558055585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:21:31,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:21:31,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:21:31,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116361986] [2024-06-21 20:21:31,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:21:31,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:21:31,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:21:31,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:21:31,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:21:31,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:21:31,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 418 transitions, 5333 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:21:31,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:21:31,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:21:31,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:21:33,286 INFO L124 PetriNetUnfolderBase]: 4602/7940 cut-off events. [2024-06-21 20:21:33,286 INFO L125 PetriNetUnfolderBase]: For 1225031/1225031 co-relation queries the response was YES. [2024-06-21 20:21:33,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56495 conditions, 7940 events. 4602/7940 cut-off events. For 1225031/1225031 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 57890 event pairs, 1256 based on Foata normal form. 12/7939 useless extension candidates. Maximal degree in co-relation 56333. Up to 6442 conditions per place. [2024-06-21 20:21:33,405 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 319 selfloop transitions, 110 changer transitions 0/438 dead transitions. [2024-06-21 20:21:33,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 438 transitions, 6293 flow [2024-06-21 20:21:33,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:21:33,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:21:33,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 20:21:33,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2024-06-21 20:21:33,406 INFO L175 Difference]: Start difference. First operand has 331 places, 418 transitions, 5333 flow. Second operand 7 states and 177 transitions. [2024-06-21 20:21:33,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 438 transitions, 6293 flow [2024-06-21 20:21:39,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 438 transitions, 6044 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-21 20:21:39,143 INFO L231 Difference]: Finished difference. Result has 333 places, 419 transitions, 5351 flow [2024-06-21 20:21:39,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5084, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5351, PETRI_PLACES=333, PETRI_TRANSITIONS=419} [2024-06-21 20:21:39,143 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 290 predicate places. [2024-06-21 20:21:39,143 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 419 transitions, 5351 flow [2024-06-21 20:21:39,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:21:39,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:21:39,144 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] [2024-06-21 20:21:39,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 20:21:39,144 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:21:39,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:21:39,144 INFO L85 PathProgramCache]: Analyzing trace with hash -276218431, now seen corresponding path program 1 times [2024-06-21 20:21:39,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:21:39,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054153187] [2024-06-21 20:21:39,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:21:39,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:21:39,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:21:39,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:21:39,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:21:39,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054153187] [2024-06-21 20:21:39,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054153187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:21:39,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:21:39,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:21:39,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851247056] [2024-06-21 20:21:39,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:21:39,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:21:39,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:21:39,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:21:39,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:21:39,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:21:39,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 419 transitions, 5351 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:21:39,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:21:39,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:21:39,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:21:40,685 INFO L124 PetriNetUnfolderBase]: 4607/7961 cut-off events. [2024-06-21 20:21:40,685 INFO L125 PetriNetUnfolderBase]: For 1159755/1159755 co-relation queries the response was YES. [2024-06-21 20:21:40,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56575 conditions, 7961 events. 4607/7961 cut-off events. For 1159755/1159755 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 57987 event pairs, 1245 based on Foata normal form. 1/7960 useless extension candidates. Maximal degree in co-relation 56412. Up to 7246 conditions per place. [2024-06-21 20:21:40,809 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 418 selfloop transitions, 27 changer transitions 0/454 dead transitions. [2024-06-21 20:21:40,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 454 transitions, 6605 flow [2024-06-21 20:21:40,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:21:40,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:21:40,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-21 20:21:40,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2024-06-21 20:21:40,810 INFO L175 Difference]: Start difference. First operand has 333 places, 419 transitions, 5351 flow. Second operand 9 states and 224 transitions. [2024-06-21 20:21:40,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 454 transitions, 6605 flow [2024-06-21 20:21:45,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 454 transitions, 6235 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-21 20:21:45,672 INFO L231 Difference]: Finished difference. Result has 335 places, 422 transitions, 5083 flow [2024-06-21 20:21:45,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4981, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5083, PETRI_PLACES=335, PETRI_TRANSITIONS=422} [2024-06-21 20:21:45,673 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 292 predicate places. [2024-06-21 20:21:45,673 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 422 transitions, 5083 flow [2024-06-21 20:21:45,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:21:45,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:21:45,673 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] [2024-06-21 20:21:45,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 20:21:45,673 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:21:45,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:21:45,674 INFO L85 PathProgramCache]: Analyzing trace with hash 45288803, now seen corresponding path program 2 times [2024-06-21 20:21:45,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:21:45,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704962300] [2024-06-21 20:21:45,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:21:45,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:21:45,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:21:45,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:21:45,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:21:45,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704962300] [2024-06-21 20:21:45,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704962300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:21:45,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:21:45,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:21:45,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88355495] [2024-06-21 20:21:45,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:21:45,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:21:45,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:21:45,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:21:45,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:21:45,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:21:45,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 422 transitions, 5083 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:21:45,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:21:45,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:21:45,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:21:47,244 INFO L124 PetriNetUnfolderBase]: 4604/7945 cut-off events. [2024-06-21 20:21:47,244 INFO L125 PetriNetUnfolderBase]: For 1164154/1164154 co-relation queries the response was YES. [2024-06-21 20:21:47,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55345 conditions, 7945 events. 4604/7945 cut-off events. For 1164154/1164154 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 57766 event pairs, 1235 based on Foata normal form. 1/7944 useless extension candidates. Maximal degree in co-relation 55183. Up to 7243 conditions per place. [2024-06-21 20:21:47,347 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 413 selfloop transitions, 27 changer transitions 0/449 dead transitions. [2024-06-21 20:21:47,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 449 transitions, 6031 flow [2024-06-21 20:21:47,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:21:47,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:21:47,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-21 20:21:47,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-21 20:21:47,348 INFO L175 Difference]: Start difference. First operand has 335 places, 422 transitions, 5083 flow. Second operand 8 states and 200 transitions. [2024-06-21 20:21:47,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 449 transitions, 6031 flow [2024-06-21 20:21:52,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 449 transitions, 5949 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-21 20:21:52,506 INFO L231 Difference]: Finished difference. Result has 335 places, 422 transitions, 5061 flow [2024-06-21 20:21:52,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5001, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5061, PETRI_PLACES=335, PETRI_TRANSITIONS=422} [2024-06-21 20:21:52,506 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 292 predicate places. [2024-06-21 20:21:52,506 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 422 transitions, 5061 flow [2024-06-21 20:21:52,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:21:52,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:21:52,507 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] [2024-06-21 20:21:52,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 20:21:52,507 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:21:52,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:21:52,507 INFO L85 PathProgramCache]: Analyzing trace with hash -838574683, now seen corresponding path program 1 times [2024-06-21 20:21:52,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:21:52,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349509843] [2024-06-21 20:21:52,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:21:52,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:21:52,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:21:52,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:21:52,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:21:52,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349509843] [2024-06-21 20:21:52,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349509843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:21:52,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:21:52,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:21:52,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637849499] [2024-06-21 20:21:52,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:21:52,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:21:52,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:21:52,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:21:52,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:21:52,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:21:52,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 422 transitions, 5061 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:21:52,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:21:52,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:21:52,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:21:54,025 INFO L124 PetriNetUnfolderBase]: 4625/7950 cut-off events. [2024-06-21 20:21:54,025 INFO L125 PetriNetUnfolderBase]: For 1213861/1213861 co-relation queries the response was YES. [2024-06-21 20:21:54,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56122 conditions, 7950 events. 4625/7950 cut-off events. For 1213861/1213861 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 57738 event pairs, 1234 based on Foata normal form. 2/7923 useless extension candidates. Maximal degree in co-relation 55960. Up to 7009 conditions per place. [2024-06-21 20:21:54,137 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 335 selfloop transitions, 113 changer transitions 2/459 dead transitions. [2024-06-21 20:21:54,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 459 transitions, 6495 flow [2024-06-21 20:21:54,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:21:54,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:21:54,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 233 transitions. [2024-06-21 20:21:54,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6164021164021164 [2024-06-21 20:21:54,139 INFO L175 Difference]: Start difference. First operand has 335 places, 422 transitions, 5061 flow. Second operand 9 states and 233 transitions. [2024-06-21 20:21:54,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 459 transitions, 6495 flow [2024-06-21 20:21:58,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 459 transitions, 6431 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 20:21:58,868 INFO L231 Difference]: Finished difference. Result has 338 places, 426 transitions, 5441 flow [2024-06-21 20:21:58,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4997, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5441, PETRI_PLACES=338, PETRI_TRANSITIONS=426} [2024-06-21 20:21:58,868 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 295 predicate places. [2024-06-21 20:21:58,868 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 426 transitions, 5441 flow [2024-06-21 20:21:58,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:21:58,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:21:58,869 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] [2024-06-21 20:21:58,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 20:21:58,870 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:21:58,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:21:58,871 INFO L85 PathProgramCache]: Analyzing trace with hash 919759199, now seen corresponding path program 2 times [2024-06-21 20:21:58,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:21:58,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826509120] [2024-06-21 20:21:58,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:21:58,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:21:58,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:21:58,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:21:58,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:21:58,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826509120] [2024-06-21 20:21:58,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826509120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:21:58,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:21:58,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:21:58,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232500680] [2024-06-21 20:21:58,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:21:58,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:21:58,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:21:58,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:21:58,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:21:59,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:21:59,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 426 transitions, 5441 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:21:59,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:21:59,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:21:59,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:22:00,403 INFO L124 PetriNetUnfolderBase]: 4620/7953 cut-off events. [2024-06-21 20:22:00,403 INFO L125 PetriNetUnfolderBase]: For 1216298/1216298 co-relation queries the response was YES. [2024-06-21 20:22:00,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56375 conditions, 7953 events. 4620/7953 cut-off events. For 1216298/1216298 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 57842 event pairs, 1259 based on Foata normal form. 2/7938 useless extension candidates. Maximal degree in co-relation 56211. Up to 7059 conditions per place. [2024-06-21 20:22:00,522 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 334 selfloop transitions, 108 changer transitions 0/451 dead transitions. [2024-06-21 20:22:00,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 451 transitions, 6387 flow [2024-06-21 20:22:00,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:22:00,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:22:00,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-21 20:22:00,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6130952380952381 [2024-06-21 20:22:00,525 INFO L175 Difference]: Start difference. First operand has 338 places, 426 transitions, 5441 flow. Second operand 8 states and 206 transitions. [2024-06-21 20:22:00,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 451 transitions, 6387 flow [2024-06-21 20:22:06,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 451 transitions, 6078 flow, removed 86 selfloop flow, removed 5 redundant places. [2024-06-21 20:22:06,110 INFO L231 Difference]: Finished difference. Result has 341 places, 426 transitions, 5353 flow [2024-06-21 20:22:06,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5132, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5353, PETRI_PLACES=341, PETRI_TRANSITIONS=426} [2024-06-21 20:22:06,116 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 298 predicate places. [2024-06-21 20:22:06,117 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 426 transitions, 5353 flow [2024-06-21 20:22:06,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:22:06,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:22:06,117 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] [2024-06-21 20:22:06,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 20:22:06,119 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:22:06,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:22:06,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1025612251, now seen corresponding path program 3 times [2024-06-21 20:22:06,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:22:06,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188902554] [2024-06-21 20:22:06,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:22:06,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:22:06,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:22:06,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:22:06,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:22:06,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188902554] [2024-06-21 20:22:06,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188902554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:22:06,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:22:06,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:22:06,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566106682] [2024-06-21 20:22:06,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:22:06,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:22:06,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:22:06,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:22:06,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:22:06,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:22:06,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 426 transitions, 5353 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:22:06,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:22:06,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:22:06,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:22:07,703 INFO L124 PetriNetUnfolderBase]: 4628/7971 cut-off events. [2024-06-21 20:22:07,703 INFO L125 PetriNetUnfolderBase]: For 1238710/1238710 co-relation queries the response was YES. [2024-06-21 20:22:07,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56686 conditions, 7971 events. 4628/7971 cut-off events. For 1238710/1238710 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 57993 event pairs, 1263 based on Foata normal form. 2/7958 useless extension candidates. Maximal degree in co-relation 56520. Up to 7071 conditions per place. [2024-06-21 20:22:07,824 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 330 selfloop transitions, 108 changer transitions 0/447 dead transitions. [2024-06-21 20:22:07,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 447 transitions, 6377 flow [2024-06-21 20:22:07,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:22:07,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:22:07,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-21 20:22:07,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5922619047619048 [2024-06-21 20:22:07,826 INFO L175 Difference]: Start difference. First operand has 341 places, 426 transitions, 5353 flow. Second operand 8 states and 199 transitions. [2024-06-21 20:22:07,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 447 transitions, 6377 flow [2024-06-21 20:22:13,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 447 transitions, 6139 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 20:22:13,511 INFO L231 Difference]: Finished difference. Result has 342 places, 428 transitions, 5442 flow [2024-06-21 20:22:13,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5115, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5442, PETRI_PLACES=342, PETRI_TRANSITIONS=428} [2024-06-21 20:22:13,512 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 299 predicate places. [2024-06-21 20:22:13,512 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 428 transitions, 5442 flow [2024-06-21 20:22:13,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:22:13,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:22:13,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:22:13,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 20:22:13,512 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:22:13,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:22:13,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1560166123, now seen corresponding path program 4 times [2024-06-21 20:22:13,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:22:13,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990303123] [2024-06-21 20:22:13,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:22:13,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:22:13,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:22:13,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:22:13,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:22:13,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990303123] [2024-06-21 20:22:13,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990303123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:22:13,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:22:13,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:22:13,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645772758] [2024-06-21 20:22:13,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:22:13,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:22:13,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:22:13,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:22:13,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:22:13,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:22:13,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 428 transitions, 5442 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:22:13,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:22:13,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:22:13,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:22:15,278 INFO L124 PetriNetUnfolderBase]: 4636/7979 cut-off events. [2024-06-21 20:22:15,278 INFO L125 PetriNetUnfolderBase]: For 1261430/1261430 co-relation queries the response was YES. [2024-06-21 20:22:15,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57075 conditions, 7979 events. 4636/7979 cut-off events. For 1261430/1261430 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 58020 event pairs, 1259 based on Foata normal form. 2/7962 useless extension candidates. Maximal degree in co-relation 56908. Up to 7063 conditions per place. [2024-06-21 20:22:15,477 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 329 selfloop transitions, 113 changer transitions 0/451 dead transitions. [2024-06-21 20:22:15,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 451 transitions, 6482 flow [2024-06-21 20:22:15,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:22:15,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:22:15,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-21 20:22:15,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.582010582010582 [2024-06-21 20:22:15,479 INFO L175 Difference]: Start difference. First operand has 342 places, 428 transitions, 5442 flow. Second operand 9 states and 220 transitions. [2024-06-21 20:22:15,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 451 transitions, 6482 flow [2024-06-21 20:22:20,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 451 transitions, 6171 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-21 20:22:20,743 INFO L231 Difference]: Finished difference. Result has 345 places, 430 transitions, 5472 flow [2024-06-21 20:22:20,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5131, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5472, PETRI_PLACES=345, PETRI_TRANSITIONS=430} [2024-06-21 20:22:20,744 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 302 predicate places. [2024-06-21 20:22:20,744 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 430 transitions, 5472 flow [2024-06-21 20:22:20,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:22:20,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:22:20,744 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] [2024-06-21 20:22:20,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 20:22:20,745 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:22:20,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:22:20,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1368301545, now seen corresponding path program 3 times [2024-06-21 20:22:20,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:22:20,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470481888] [2024-06-21 20:22:20,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:22:20,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:22:20,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:22:20,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:22:20,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:22:20,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470481888] [2024-06-21 20:22:20,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470481888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:22:20,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:22:20,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:22:20,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307743734] [2024-06-21 20:22:20,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:22:20,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:22:20,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:22:20,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:22:20,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:22:20,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:22:20,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 430 transitions, 5472 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:22:20,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:22:20,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:22:20,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:22:22,606 INFO L124 PetriNetUnfolderBase]: 4641/7984 cut-off events. [2024-06-21 20:22:22,606 INFO L125 PetriNetUnfolderBase]: For 1272253/1272253 co-relation queries the response was YES. [2024-06-21 20:22:22,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57186 conditions, 7984 events. 4641/7984 cut-off events. For 1272253/1272253 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 58009 event pairs, 1250 based on Foata normal form. 1/7963 useless extension candidates. Maximal degree in co-relation 57018. Up to 6748 conditions per place. [2024-06-21 20:22:22,735 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 288 selfloop transitions, 166 changer transitions 0/463 dead transitions. [2024-06-21 20:22:22,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 463 transitions, 7262 flow [2024-06-21 20:22:22,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:22:22,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:22:22,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-06-21 20:22:22,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2024-06-21 20:22:22,736 INFO L175 Difference]: Start difference. First operand has 345 places, 430 transitions, 5472 flow. Second operand 8 states and 217 transitions. [2024-06-21 20:22:22,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 463 transitions, 7262 flow [2024-06-21 20:22:28,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 463 transitions, 6937 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-21 20:22:28,355 INFO L231 Difference]: Finished difference. Result has 346 places, 433 transitions, 5531 flow [2024-06-21 20:22:28,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5147, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5531, PETRI_PLACES=346, PETRI_TRANSITIONS=433} [2024-06-21 20:22:28,356 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 303 predicate places. [2024-06-21 20:22:28,356 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 433 transitions, 5531 flow [2024-06-21 20:22:28,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:22:28,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:22:28,356 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] [2024-06-21 20:22:28,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 20:22:28,356 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:22:28,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:22:28,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1098122123, now seen corresponding path program 4 times [2024-06-21 20:22:28,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:22:28,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621180696] [2024-06-21 20:22:28,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:22:28,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:22:28,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:22:28,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:22:28,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:22:28,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621180696] [2024-06-21 20:22:28,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621180696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:22:28,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:22:28,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:22:28,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214954273] [2024-06-21 20:22:28,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:22:28,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:22:28,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:22:28,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:22:28,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:22:28,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:22:28,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 433 transitions, 5531 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:22:28,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:22:28,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:22:28,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:22:30,329 INFO L124 PetriNetUnfolderBase]: 4654/8004 cut-off events. [2024-06-21 20:22:30,329 INFO L125 PetriNetUnfolderBase]: For 1298140/1298140 co-relation queries the response was YES. [2024-06-21 20:22:30,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57658 conditions, 8004 events. 4654/8004 cut-off events. For 1298140/1298140 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 58262 event pairs, 1250 based on Foata normal form. 1/7983 useless extension candidates. Maximal degree in co-relation 57489. Up to 6758 conditions per place. [2024-06-21 20:22:30,447 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 286 selfloop transitions, 172 changer transitions 0/467 dead transitions. [2024-06-21 20:22:30,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 467 transitions, 7643 flow [2024-06-21 20:22:30,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:22:30,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:22:30,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-21 20:22:30,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6398809523809523 [2024-06-21 20:22:30,448 INFO L175 Difference]: Start difference. First operand has 346 places, 433 transitions, 5531 flow. Second operand 8 states and 215 transitions. [2024-06-21 20:22:30,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 467 transitions, 7643 flow [2024-06-21 20:22:36,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 467 transitions, 7273 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 20:22:36,208 INFO L231 Difference]: Finished difference. Result has 348 places, 439 transitions, 5615 flow [2024-06-21 20:22:36,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5173, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5615, PETRI_PLACES=348, PETRI_TRANSITIONS=439} [2024-06-21 20:22:36,209 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 305 predicate places. [2024-06-21 20:22:36,209 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 439 transitions, 5615 flow [2024-06-21 20:22:36,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:22:36,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:22:36,209 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] [2024-06-21 20:22:36,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 20:22:36,209 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:22:36,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:22:36,210 INFO L85 PathProgramCache]: Analyzing trace with hash -2055619729, now seen corresponding path program 5 times [2024-06-21 20:22:36,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:22:36,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553113039] [2024-06-21 20:22:36,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:22:36,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:22:36,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:22:36,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:22:36,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:22:36,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553113039] [2024-06-21 20:22:36,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553113039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:22:36,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:22:36,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:22:36,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969654123] [2024-06-21 20:22:36,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:22:36,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:22:36,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:22:36,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:22:36,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:22:36,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:22:36,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 439 transitions, 5615 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:22:36,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:22:36,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:22:36,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:22:38,037 INFO L124 PetriNetUnfolderBase]: 4651/8000 cut-off events. [2024-06-21 20:22:38,038 INFO L125 PetriNetUnfolderBase]: For 1309242/1309242 co-relation queries the response was YES. [2024-06-21 20:22:38,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57621 conditions, 8000 events. 4651/8000 cut-off events. For 1309242/1309242 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 58206 event pairs, 1250 based on Foata normal form. 1/7979 useless extension candidates. Maximal degree in co-relation 57451. Up to 6756 conditions per place. [2024-06-21 20:22:38,144 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 285 selfloop transitions, 175 changer transitions 0/469 dead transitions. [2024-06-21 20:22:38,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 469 transitions, 7383 flow [2024-06-21 20:22:38,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:22:38,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:22:38,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-06-21 20:22:38,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2024-06-21 20:22:38,145 INFO L175 Difference]: Start difference. First operand has 348 places, 439 transitions, 5615 flow. Second operand 8 states and 217 transitions. [2024-06-21 20:22:38,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 469 transitions, 7383 flow [2024-06-21 20:22:43,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 469 transitions, 7087 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-21 20:22:43,964 INFO L231 Difference]: Finished difference. Result has 352 places, 439 transitions, 5675 flow [2024-06-21 20:22:43,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5319, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5675, PETRI_PLACES=352, PETRI_TRANSITIONS=439} [2024-06-21 20:22:43,965 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 309 predicate places. [2024-06-21 20:22:43,965 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 439 transitions, 5675 flow [2024-06-21 20:22:43,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:22:43,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:22:43,965 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] [2024-06-21 20:22:43,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 20:22:43,966 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:22:43,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:22:43,966 INFO L85 PathProgramCache]: Analyzing trace with hash -2044191889, now seen corresponding path program 6 times [2024-06-21 20:22:43,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:22:43,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996790109] [2024-06-21 20:22:43,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:22:43,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:22:43,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:22:44,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:22:44,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:22:44,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996790109] [2024-06-21 20:22:44,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996790109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:22:44,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:22:44,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:22:44,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172247649] [2024-06-21 20:22:44,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:22:44,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:22:44,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:22:44,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:22:44,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:22:44,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:22:44,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 439 transitions, 5675 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:22:44,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:22:44,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:22:44,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:22:45,728 INFO L124 PetriNetUnfolderBase]: 4656/8021 cut-off events. [2024-06-21 20:22:45,728 INFO L125 PetriNetUnfolderBase]: For 1329106/1329106 co-relation queries the response was YES. [2024-06-21 20:22:45,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57888 conditions, 8021 events. 4656/8021 cut-off events. For 1329106/1329106 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 58490 event pairs, 1260 based on Foata normal form. 1/8000 useless extension candidates. Maximal degree in co-relation 57717. Up to 6760 conditions per place. [2024-06-21 20:22:45,842 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 282 selfloop transitions, 178 changer transitions 0/469 dead transitions. [2024-06-21 20:22:45,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 469 transitions, 7496 flow [2024-06-21 20:22:45,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:22:45,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:22:45,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-21 20:22:45,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6369047619047619 [2024-06-21 20:22:45,843 INFO L175 Difference]: Start difference. First operand has 352 places, 439 transitions, 5675 flow. Second operand 8 states and 214 transitions. [2024-06-21 20:22:45,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 469 transitions, 7496 flow [2024-06-21 20:22:51,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 469 transitions, 7035 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 20:22:51,012 INFO L231 Difference]: Finished difference. Result has 352 places, 442 transitions, 5631 flow [2024-06-21 20:22:51,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5223, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5631, PETRI_PLACES=352, PETRI_TRANSITIONS=442} [2024-06-21 20:22:51,012 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 309 predicate places. [2024-06-21 20:22:51,013 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 442 transitions, 5631 flow [2024-06-21 20:22:51,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:22:51,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:22:51,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:22:51,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 20:22:51,013 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:22:51,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:22:51,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1828590947, now seen corresponding path program 7 times [2024-06-21 20:22:51,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:22:51,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202832385] [2024-06-21 20:22:51,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:22:51,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:22:51,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:22:51,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:22:51,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:22:51,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202832385] [2024-06-21 20:22:51,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202832385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:22:51,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:22:51,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:22:51,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940641887] [2024-06-21 20:22:51,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:22:51,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:22:51,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:22:51,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:22:51,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:22:51,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:22:51,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 442 transitions, 5631 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:22:51,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:22:51,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:22:51,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:22:52,745 INFO L124 PetriNetUnfolderBase]: 4677/8046 cut-off events. [2024-06-21 20:22:52,745 INFO L125 PetriNetUnfolderBase]: For 1365858/1365858 co-relation queries the response was YES. [2024-06-21 20:22:52,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58490 conditions, 8046 events. 4677/8046 cut-off events. For 1365858/1365858 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 58627 event pairs, 1252 based on Foata normal form. 1/8025 useless extension candidates. Maximal degree in co-relation 58318. Up to 6776 conditions per place. [2024-06-21 20:22:52,857 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 271 selfloop transitions, 192 changer transitions 0/472 dead transitions. [2024-06-21 20:22:52,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 472 transitions, 7811 flow [2024-06-21 20:22:52,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:22:52,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:22:52,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-21 20:22:52,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6360544217687075 [2024-06-21 20:22:52,858 INFO L175 Difference]: Start difference. First operand has 352 places, 442 transitions, 5631 flow. Second operand 7 states and 187 transitions. [2024-06-21 20:22:52,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 472 transitions, 7811 flow [2024-06-21 20:22:58,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 472 transitions, 7503 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 20:22:58,878 INFO L231 Difference]: Finished difference. Result has 354 places, 451 transitions, 5869 flow [2024-06-21 20:22:58,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5332, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5869, PETRI_PLACES=354, PETRI_TRANSITIONS=451} [2024-06-21 20:22:58,879 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 311 predicate places. [2024-06-21 20:22:58,879 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 451 transitions, 5869 flow [2024-06-21 20:22:58,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:22:58,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:22:58,879 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] [2024-06-21 20:22:58,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 20:22:58,880 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:22:58,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:22:58,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1769748335, now seen corresponding path program 8 times [2024-06-21 20:22:58,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:22:58,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935399041] [2024-06-21 20:22:58,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:22:58,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:22:58,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:22:58,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:22:58,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:22:58,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935399041] [2024-06-21 20:22:58,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935399041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:22:58,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:22:58,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:22:58,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923988099] [2024-06-21 20:22:58,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:22:58,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:22:58,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:22:58,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:22:58,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:22:58,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:22:58,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 451 transitions, 5869 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:22:58,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:22:58,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:22:58,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:23:00,675 INFO L124 PetriNetUnfolderBase]: 4690/8064 cut-off events. [2024-06-21 20:23:00,676 INFO L125 PetriNetUnfolderBase]: For 1395937/1395937 co-relation queries the response was YES. [2024-06-21 20:23:00,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58949 conditions, 8064 events. 4690/8064 cut-off events. For 1395937/1395937 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 58698 event pairs, 1250 based on Foata normal form. 1/8043 useless extension candidates. Maximal degree in co-relation 58776. Up to 6786 conditions per place. [2024-06-21 20:23:00,788 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 271 selfloop transitions, 198 changer transitions 0/478 dead transitions. [2024-06-21 20:23:00,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 478 transitions, 8023 flow [2024-06-21 20:23:00,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:23:00,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:23:00,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-21 20:23:00,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6326530612244898 [2024-06-21 20:23:00,789 INFO L175 Difference]: Start difference. First operand has 354 places, 451 transitions, 5869 flow. Second operand 7 states and 186 transitions. [2024-06-21 20:23:00,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 478 transitions, 8023 flow [2024-06-21 20:23:07,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 478 transitions, 7739 flow, removed 31 selfloop flow, removed 2 redundant places. [2024-06-21 20:23:07,219 INFO L231 Difference]: Finished difference. Result has 359 places, 457 transitions, 6097 flow [2024-06-21 20:23:07,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5609, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6097, PETRI_PLACES=359, PETRI_TRANSITIONS=457} [2024-06-21 20:23:07,220 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 316 predicate places. [2024-06-21 20:23:07,220 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 457 transitions, 6097 flow [2024-06-21 20:23:07,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:23:07,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:23:07,221 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] [2024-06-21 20:23:07,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 20:23:07,221 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:23:07,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:23:07,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1160154901, now seen corresponding path program 9 times [2024-06-21 20:23:07,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:23:07,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630739483] [2024-06-21 20:23:07,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:23:07,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:23:07,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:23:07,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:23:07,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:23:07,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630739483] [2024-06-21 20:23:07,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630739483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:23:07,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:23:07,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:23:07,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019291374] [2024-06-21 20:23:07,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:23:07,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:23:07,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:23:07,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:23:07,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:23:07,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:23:07,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 457 transitions, 6097 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:23:07,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:23:07,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:23:07,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:23:09,031 INFO L124 PetriNetUnfolderBase]: 4695/8073 cut-off events. [2024-06-21 20:23:09,031 INFO L125 PetriNetUnfolderBase]: For 1417265/1417265 co-relation queries the response was YES. [2024-06-21 20:23:09,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59187 conditions, 8073 events. 4695/8073 cut-off events. For 1417265/1417265 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 58760 event pairs, 1279 based on Foata normal form. 1/8052 useless extension candidates. Maximal degree in co-relation 59013. Up to 6790 conditions per place. [2024-06-21 20:23:09,140 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 272 selfloop transitions, 201 changer transitions 0/482 dead transitions. [2024-06-21 20:23:09,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 482 transitions, 8209 flow [2024-06-21 20:23:09,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:23:09,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:23:09,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-21 20:23:09,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6160714285714286 [2024-06-21 20:23:09,141 INFO L175 Difference]: Start difference. First operand has 359 places, 457 transitions, 6097 flow. Second operand 8 states and 207 transitions. [2024-06-21 20:23:09,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 482 transitions, 8209 flow [2024-06-21 20:23:16,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 482 transitions, 7870 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-21 20:23:16,227 INFO L231 Difference]: Finished difference. Result has 364 places, 460 transitions, 6216 flow [2024-06-21 20:23:16,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5764, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6216, PETRI_PLACES=364, PETRI_TRANSITIONS=460} [2024-06-21 20:23:16,227 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 321 predicate places. [2024-06-21 20:23:16,228 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 460 transitions, 6216 flow [2024-06-21 20:23:16,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:23:16,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:23:16,229 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] [2024-06-21 20:23:16,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 20:23:16,229 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:23:16,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:23:16,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1551478851, now seen corresponding path program 1 times [2024-06-21 20:23:16,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:23:16,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52730308] [2024-06-21 20:23:16,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:23:16,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:23:16,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:23:16,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:23:16,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:23:16,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52730308] [2024-06-21 20:23:16,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52730308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:23:16,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:23:16,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:23:16,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448609625] [2024-06-21 20:23:16,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:23:16,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:23:16,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:23:16,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:23:16,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:23:16,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:23:16,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 460 transitions, 6216 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:23:16,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:23:16,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:23:16,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:23:18,052 INFO L124 PetriNetUnfolderBase]: 4716/8110 cut-off events. [2024-06-21 20:23:18,052 INFO L125 PetriNetUnfolderBase]: For 1466468/1466468 co-relation queries the response was YES. [2024-06-21 20:23:18,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60079 conditions, 8110 events. 4716/8110 cut-off events. For 1466468/1466468 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 59131 event pairs, 1253 based on Foata normal form. 2/8093 useless extension candidates. Maximal degree in co-relation 59904. Up to 7151 conditions per place. [2024-06-21 20:23:18,167 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 388 selfloop transitions, 98 changer transitions 2/497 dead transitions. [2024-06-21 20:23:18,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 497 transitions, 7702 flow [2024-06-21 20:23:18,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:23:18,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:23:18,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-21 20:23:18,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6137566137566137 [2024-06-21 20:23:18,168 INFO L175 Difference]: Start difference. First operand has 364 places, 460 transitions, 6216 flow. Second operand 9 states and 232 transitions. [2024-06-21 20:23:18,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 497 transitions, 7702 flow [2024-06-21 20:23:24,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 497 transitions, 7282 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 20:23:24,105 INFO L231 Difference]: Finished difference. Result has 368 places, 464 transitions, 6166 flow [2024-06-21 20:23:24,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5796, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6166, PETRI_PLACES=368, PETRI_TRANSITIONS=464} [2024-06-21 20:23:24,116 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 325 predicate places. [2024-06-21 20:23:24,116 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 464 transitions, 6166 flow [2024-06-21 20:23:24,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:23:24,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:23:24,117 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] [2024-06-21 20:23:24,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 20:23:24,117 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:23:24,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:23:24,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1554335811, now seen corresponding path program 2 times [2024-06-21 20:23:24,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:23:24,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285464765] [2024-06-21 20:23:24,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:23:24,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:23:24,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:23:24,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:23:24,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:23:24,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285464765] [2024-06-21 20:23:24,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285464765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:23:24,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:23:24,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:23:24,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937110050] [2024-06-21 20:23:24,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:23:24,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:23:24,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:23:24,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:23:24,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:23:24,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:23:24,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 464 transitions, 6166 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:23:24,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:23:24,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:23:24,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:23:25,921 INFO L124 PetriNetUnfolderBase]: 4711/8109 cut-off events. [2024-06-21 20:23:25,921 INFO L125 PetriNetUnfolderBase]: For 1469169/1469169 co-relation queries the response was YES. [2024-06-21 20:23:26,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59709 conditions, 8109 events. 4711/8109 cut-off events. For 1469169/1469169 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 59161 event pairs, 1268 based on Foata normal form. 2/8097 useless extension candidates. Maximal degree in co-relation 59532. Up to 7201 conditions per place. [2024-06-21 20:23:26,038 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 387 selfloop transitions, 93 changer transitions 0/489 dead transitions. [2024-06-21 20:23:26,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 489 transitions, 7188 flow [2024-06-21 20:23:26,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:23:26,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:23:26,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-21 20:23:26,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6101190476190477 [2024-06-21 20:23:26,039 INFO L175 Difference]: Start difference. First operand has 368 places, 464 transitions, 6166 flow. Second operand 8 states and 205 transitions. [2024-06-21 20:23:26,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 489 transitions, 7188 flow [2024-06-21 20:23:32,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 489 transitions, 6886 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-21 20:23:32,425 INFO L231 Difference]: Finished difference. Result has 370 places, 464 transitions, 6055 flow [2024-06-21 20:23:32,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5864, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6055, PETRI_PLACES=370, PETRI_TRANSITIONS=464} [2024-06-21 20:23:32,425 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 327 predicate places. [2024-06-21 20:23:32,425 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 464 transitions, 6055 flow [2024-06-21 20:23:32,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:23:32,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:23:32,426 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] [2024-06-21 20:23:32,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 20:23:32,426 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:23:32,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:23:32,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1297337277, now seen corresponding path program 3 times [2024-06-21 20:23:32,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:23:32,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130717659] [2024-06-21 20:23:32,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:23:32,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:23:32,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:23:32,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:23:32,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:23:32,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130717659] [2024-06-21 20:23:32,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130717659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:23:32,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:23:32,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:23:32,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032847334] [2024-06-21 20:23:32,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:23:32,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:23:32,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:23:32,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:23:32,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:23:32,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:23:32,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 464 transitions, 6055 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:23:32,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:23:32,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:23:32,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:23:34,402 INFO L124 PetriNetUnfolderBase]: 4719/8129 cut-off events. [2024-06-21 20:23:34,403 INFO L125 PetriNetUnfolderBase]: For 1488624/1488624 co-relation queries the response was YES. [2024-06-21 20:23:34,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59796 conditions, 8129 events. 4719/8129 cut-off events. For 1488624/1488624 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 59395 event pairs, 1276 based on Foata normal form. 2/8117 useless extension candidates. Maximal degree in co-relation 59618. Up to 7213 conditions per place. [2024-06-21 20:23:34,505 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 380 selfloop transitions, 95 changer transitions 0/484 dead transitions. [2024-06-21 20:23:34,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 484 transitions, 7128 flow [2024-06-21 20:23:34,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:23:34,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:23:34,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 20:23:34,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6054421768707483 [2024-06-21 20:23:34,507 INFO L175 Difference]: Start difference. First operand has 370 places, 464 transitions, 6055 flow. Second operand 7 states and 178 transitions. [2024-06-21 20:23:34,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 484 transitions, 7128 flow [2024-06-21 20:23:41,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 484 transitions, 6922 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 20:23:41,115 INFO L231 Difference]: Finished difference. Result has 370 places, 466 transitions, 6127 flow [2024-06-21 20:23:41,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5849, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6127, PETRI_PLACES=370, PETRI_TRANSITIONS=466} [2024-06-21 20:23:41,116 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 327 predicate places. [2024-06-21 20:23:41,116 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 466 transitions, 6127 flow [2024-06-21 20:23:41,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:23:41,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:23:41,116 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] [2024-06-21 20:23:41,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 20:23:41,116 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:23:41,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:23:41,117 INFO L85 PathProgramCache]: Analyzing trace with hash -699896171, now seen corresponding path program 5 times [2024-06-21 20:23:41,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:23:41,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002037785] [2024-06-21 20:23:41,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:23:41,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:23:41,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:23:41,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:23:41,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:23:41,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002037785] [2024-06-21 20:23:41,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002037785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:23:41,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:23:41,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:23:41,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133856412] [2024-06-21 20:23:41,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:23:41,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:23:41,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:23:41,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:23:41,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:23:41,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:23:41,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 466 transitions, 6127 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:23:41,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:23:41,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:23:41,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:23:42,982 INFO L124 PetriNetUnfolderBase]: 4727/8128 cut-off events. [2024-06-21 20:23:42,983 INFO L125 PetriNetUnfolderBase]: For 1513215/1513215 co-relation queries the response was YES. [2024-06-21 20:23:43,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60168 conditions, 8128 events. 4727/8128 cut-off events. For 1513215/1513215 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 59369 event pairs, 1260 based on Foata normal form. 2/8115 useless extension candidates. Maximal degree in co-relation 59989. Up to 7156 conditions per place. [2024-06-21 20:23:43,088 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 381 selfloop transitions, 108 changer transitions 2/500 dead transitions. [2024-06-21 20:23:43,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 500 transitions, 7683 flow [2024-06-21 20:23:43,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:23:43,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:23:43,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-06-21 20:23:43,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6058201058201058 [2024-06-21 20:23:43,090 INFO L175 Difference]: Start difference. First operand has 370 places, 466 transitions, 6127 flow. Second operand 9 states and 229 transitions. [2024-06-21 20:23:43,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 500 transitions, 7683 flow [2024-06-21 20:23:50,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 500 transitions, 7428 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-21 20:23:50,049 INFO L231 Difference]: Finished difference. Result has 375 places, 470 transitions, 6326 flow [2024-06-21 20:23:50,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5872, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6326, PETRI_PLACES=375, PETRI_TRANSITIONS=470} [2024-06-21 20:23:50,049 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 332 predicate places. [2024-06-21 20:23:50,049 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 470 transitions, 6326 flow [2024-06-21 20:23:50,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:23:50,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:23:50,050 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] [2024-06-21 20:23:50,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 20:23:50,050 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:23:50,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:23:50,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1430027685, now seen corresponding path program 6 times [2024-06-21 20:23:50,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:23:50,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771014546] [2024-06-21 20:23:50,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:23:50,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:23:50,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:23:50,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:23:50,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:23:50,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771014546] [2024-06-21 20:23:50,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771014546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:23:50,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:23:50,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:23:50,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450955042] [2024-06-21 20:23:50,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:23:50,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:23:50,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:23:50,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:23:50,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:23:50,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:23:50,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 470 transitions, 6326 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:23:50,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:23:50,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:23:50,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:23:51,995 INFO L124 PetriNetUnfolderBase]: 4722/8126 cut-off events. [2024-06-21 20:23:51,995 INFO L125 PetriNetUnfolderBase]: For 1515563/1515563 co-relation queries the response was YES. [2024-06-21 20:23:52,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59983 conditions, 8126 events. 4722/8126 cut-off events. For 1515563/1515563 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 59296 event pairs, 1276 based on Foata normal form. 2/8122 useless extension candidates. Maximal degree in co-relation 59802. Up to 7206 conditions per place. [2024-06-21 20:23:52,149 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 380 selfloop transitions, 103 changer transitions 0/492 dead transitions. [2024-06-21 20:23:52,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 492 transitions, 7346 flow [2024-06-21 20:23:52,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:23:52,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:23:52,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-21 20:23:52,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6011904761904762 [2024-06-21 20:23:52,150 INFO L175 Difference]: Start difference. First operand has 375 places, 470 transitions, 6326 flow. Second operand 8 states and 202 transitions. [2024-06-21 20:23:52,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 492 transitions, 7346 flow [2024-06-21 20:23:58,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 492 transitions, 7027 flow, removed 96 selfloop flow, removed 5 redundant places. [2024-06-21 20:23:58,017 INFO L231 Difference]: Finished difference. Result has 378 places, 470 transitions, 6218 flow [2024-06-21 20:23:58,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6007, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6218, PETRI_PLACES=378, PETRI_TRANSITIONS=470} [2024-06-21 20:23:58,018 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-21 20:23:58,018 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 470 transitions, 6218 flow [2024-06-21 20:23:58,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:23:58,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:23:58,018 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] [2024-06-21 20:23:58,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-21 20:23:58,019 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:23:58,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:23:58,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1547237097, now seen corresponding path program 10 times [2024-06-21 20:23:58,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:23:58,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634479088] [2024-06-21 20:23:58,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:23:58,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:23:58,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:23:58,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:23:58,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:23:58,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634479088] [2024-06-21 20:23:58,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634479088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:23:58,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:23:58,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:23:58,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481366472] [2024-06-21 20:23:58,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:23:58,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:23:58,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:23:58,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:23:58,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:23:58,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:23:58,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 470 transitions, 6218 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:23:58,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:23:58,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:23:58,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:23:59,932 INFO L124 PetriNetUnfolderBase]: 4727/8133 cut-off events. [2024-06-21 20:23:59,932 INFO L125 PetriNetUnfolderBase]: For 1522264/1522264 co-relation queries the response was YES. [2024-06-21 20:24:00,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60085 conditions, 8133 events. 4727/8133 cut-off events. For 1522264/1522264 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 59401 event pairs, 1304 based on Foata normal form. 1/8128 useless extension candidates. Maximal degree in co-relation 59902. Up to 6835 conditions per place. [2024-06-21 20:24:00,050 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 324 selfloop transitions, 166 changer transitions 0/499 dead transitions. [2024-06-21 20:24:00,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 499 transitions, 7871 flow [2024-06-21 20:24:00,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:24:00,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:24:00,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-21 20:24:00,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6339285714285714 [2024-06-21 20:24:00,051 INFO L175 Difference]: Start difference. First operand has 378 places, 470 transitions, 6218 flow. Second operand 8 states and 213 transitions. [2024-06-21 20:24:00,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 499 transitions, 7871 flow [2024-06-21 20:24:07,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 499 transitions, 7643 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 20:24:07,965 INFO L231 Difference]: Finished difference. Result has 379 places, 473 transitions, 6383 flow [2024-06-21 20:24:07,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5990, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6383, PETRI_PLACES=379, PETRI_TRANSITIONS=473} [2024-06-21 20:24:07,966 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 336 predicate places. [2024-06-21 20:24:07,966 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 473 transitions, 6383 flow [2024-06-21 20:24:07,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:24:07,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:24:07,966 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] [2024-06-21 20:24:07,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-21 20:24:07,967 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:24:07,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:24:07,967 INFO L85 PathProgramCache]: Analyzing trace with hash -137327609, now seen corresponding path program 11 times [2024-06-21 20:24:07,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:24:07,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60167090] [2024-06-21 20:24:07,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:24:07,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:24:07,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:24:08,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:24:08,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:24:08,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60167090] [2024-06-21 20:24:08,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60167090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:24:08,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:24:08,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:24:08,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896842264] [2024-06-21 20:24:08,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:24:08,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:24:08,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:24:08,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:24:08,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:24:08,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:24:08,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 473 transitions, 6383 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:24:08,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:24:08,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:24:08,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:24:09,875 INFO L124 PetriNetUnfolderBase]: 4740/8157 cut-off events. [2024-06-21 20:24:09,875 INFO L125 PetriNetUnfolderBase]: For 1554710/1554710 co-relation queries the response was YES. [2024-06-21 20:24:09,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60734 conditions, 8157 events. 4740/8157 cut-off events. For 1554710/1554710 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 59604 event pairs, 1305 based on Foata normal form. 1/8152 useless extension candidates. Maximal degree in co-relation 60550. Up to 6845 conditions per place. [2024-06-21 20:24:09,991 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 321 selfloop transitions, 173 changer transitions 0/503 dead transitions. [2024-06-21 20:24:09,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 503 transitions, 8371 flow [2024-06-21 20:24:09,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:24:09,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:24:09,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-21 20:24:09,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6279761904761905 [2024-06-21 20:24:09,992 INFO L175 Difference]: Start difference. First operand has 379 places, 473 transitions, 6383 flow. Second operand 8 states and 211 transitions. [2024-06-21 20:24:09,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 503 transitions, 8371 flow [2024-06-21 20:24:17,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 503 transitions, 8108 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 20:24:17,022 INFO L231 Difference]: Finished difference. Result has 383 places, 479 transitions, 6590 flow [2024-06-21 20:24:17,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6124, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6590, PETRI_PLACES=383, PETRI_TRANSITIONS=479} [2024-06-21 20:24:17,022 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 340 predicate places. [2024-06-21 20:24:17,023 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 479 transitions, 6590 flow [2024-06-21 20:24:17,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:24:17,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:24:17,023 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] [2024-06-21 20:24:17,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-21 20:24:17,023 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:24:17,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:24:17,023 INFO L85 PathProgramCache]: Analyzing trace with hash 226220623, now seen corresponding path program 12 times [2024-06-21 20:24:17,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:24:17,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654778804] [2024-06-21 20:24:17,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:24:17,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:24:17,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:24:17,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:24:17,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:24:17,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654778804] [2024-06-21 20:24:17,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654778804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:24:17,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:24:17,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:24:17,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766076513] [2024-06-21 20:24:17,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:24:17,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:24:17,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:24:17,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:24:17,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:24:17,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:24:17,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 479 transitions, 6590 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:24:17,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:24:17,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:24:17,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:24:18,820 INFO L124 PetriNetUnfolderBase]: 4737/8153 cut-off events. [2024-06-21 20:24:18,821 INFO L125 PetriNetUnfolderBase]: For 1567824/1567824 co-relation queries the response was YES. [2024-06-21 20:24:18,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60755 conditions, 8153 events. 4737/8153 cut-off events. For 1567824/1567824 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 59601 event pairs, 1308 based on Foata normal form. 1/8148 useless extension candidates. Maximal degree in co-relation 60568. Up to 6843 conditions per place. [2024-06-21 20:24:18,936 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 325 selfloop transitions, 171 changer transitions 0/505 dead transitions. [2024-06-21 20:24:18,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 505 transitions, 8210 flow [2024-06-21 20:24:18,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:24:18,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:24:18,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-21 20:24:18,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-06-21 20:24:18,937 INFO L175 Difference]: Start difference. First operand has 383 places, 479 transitions, 6590 flow. Second operand 8 states and 212 transitions. [2024-06-21 20:24:18,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 505 transitions, 8210 flow [2024-06-21 20:24:27,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 505 transitions, 7943 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-21 20:24:27,669 INFO L231 Difference]: Finished difference. Result has 387 places, 479 transitions, 6671 flow [2024-06-21 20:24:27,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6323, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6671, PETRI_PLACES=387, PETRI_TRANSITIONS=479} [2024-06-21 20:24:27,669 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 344 predicate places. [2024-06-21 20:24:27,669 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 479 transitions, 6671 flow [2024-06-21 20:24:27,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:24:27,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:24:27,670 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] [2024-06-21 20:24:27,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-21 20:24:27,670 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:24:27,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:24:27,670 INFO L85 PathProgramCache]: Analyzing trace with hash -491746391, now seen corresponding path program 13 times [2024-06-21 20:24:27,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:24:27,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362385139] [2024-06-21 20:24:27,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:24:27,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:24:27,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:24:27,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:24:27,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:24:27,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362385139] [2024-06-21 20:24:27,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362385139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:24:27,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:24:27,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:24:27,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241302635] [2024-06-21 20:24:27,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:24:27,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:24:27,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:24:27,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:24:27,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:24:27,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:24:27,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 479 transitions, 6671 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:24:27,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:24:27,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:24:27,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:24:29,599 INFO L124 PetriNetUnfolderBase]: 4734/8157 cut-off events. [2024-06-21 20:24:29,600 INFO L125 PetriNetUnfolderBase]: For 1579845/1579845 co-relation queries the response was YES. [2024-06-21 20:24:29,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60773 conditions, 8157 events. 4734/8157 cut-off events. For 1579845/1579845 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 59678 event pairs, 1312 based on Foata normal form. 1/8152 useless extension candidates. Maximal degree in co-relation 60584. Up to 6841 conditions per place. [2024-06-21 20:24:29,710 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 319 selfloop transitions, 175 changer transitions 0/503 dead transitions. [2024-06-21 20:24:29,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 503 transitions, 8569 flow [2024-06-21 20:24:29,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:24:29,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:24:29,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-21 20:24:29,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 20:24:29,712 INFO L175 Difference]: Start difference. First operand has 387 places, 479 transitions, 6671 flow. Second operand 8 states and 210 transitions. [2024-06-21 20:24:29,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 503 transitions, 8569 flow [2024-06-21 20:24:36,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 503 transitions, 8110 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 20:24:36,894 INFO L231 Difference]: Finished difference. Result has 387 places, 479 transitions, 6568 flow [2024-06-21 20:24:36,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6212, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6568, PETRI_PLACES=387, PETRI_TRANSITIONS=479} [2024-06-21 20:24:36,894 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 344 predicate places. [2024-06-21 20:24:36,895 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 479 transitions, 6568 flow [2024-06-21 20:24:36,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:24:36,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:24:36,895 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] [2024-06-21 20:24:36,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-21 20:24:36,895 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:24:36,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:24:36,896 INFO L85 PathProgramCache]: Analyzing trace with hash 154504309, now seen corresponding path program 14 times [2024-06-21 20:24:36,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:24:36,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481198561] [2024-06-21 20:24:36,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:24:36,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:24:36,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:24:36,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:24:36,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:24:36,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481198561] [2024-06-21 20:24:36,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481198561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:24:36,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:24:36,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:24:36,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326362921] [2024-06-21 20:24:36,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:24:36,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:24:36,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:24:36,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:24:36,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:24:37,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:24:37,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 479 transitions, 6568 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:24:37,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:24:37,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:24:37,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:24:38,794 INFO L124 PetriNetUnfolderBase]: 4731/8153 cut-off events. [2024-06-21 20:24:38,795 INFO L125 PetriNetUnfolderBase]: For 1589511/1589511 co-relation queries the response was YES. [2024-06-21 20:24:38,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60706 conditions, 8153 events. 4731/8153 cut-off events. For 1589511/1589511 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 59600 event pairs, 1316 based on Foata normal form. 1/8148 useless extension candidates. Maximal degree in co-relation 60517. Up to 6839 conditions per place. [2024-06-21 20:24:38,913 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 318 selfloop transitions, 178 changer transitions 0/505 dead transitions. [2024-06-21 20:24:38,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 505 transitions, 8196 flow [2024-06-21 20:24:38,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:24:38,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:24:38,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-21 20:24:38,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6279761904761905 [2024-06-21 20:24:38,914 INFO L175 Difference]: Start difference. First operand has 387 places, 479 transitions, 6568 flow. Second operand 8 states and 211 transitions. [2024-06-21 20:24:38,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 505 transitions, 8196 flow [2024-06-21 20:24:47,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 505 transitions, 7842 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 20:24:47,647 INFO L231 Difference]: Finished difference. Result has 389 places, 479 transitions, 6576 flow [2024-06-21 20:24:47,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6214, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6576, PETRI_PLACES=389, PETRI_TRANSITIONS=479} [2024-06-21 20:24:47,648 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 346 predicate places. [2024-06-21 20:24:47,648 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 479 transitions, 6576 flow [2024-06-21 20:24:47,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:24:47,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:24:47,648 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] [2024-06-21 20:24:47,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-21 20:24:47,648 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:24:47,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:24:47,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1497597827, now seen corresponding path program 15 times [2024-06-21 20:24:47,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:24:47,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386689876] [2024-06-21 20:24:47,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:24:47,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:24:47,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:24:47,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:24:47,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:24:47,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386689876] [2024-06-21 20:24:47,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386689876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:24:47,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:24:47,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:24:47,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786108768] [2024-06-21 20:24:47,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:24:47,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:24:47,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:24:47,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:24:47,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:24:47,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:24:47,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 479 transitions, 6576 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:24:47,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:24:47,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:24:47,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:24:49,446 INFO L124 PetriNetUnfolderBase]: 4752/8176 cut-off events. [2024-06-21 20:24:49,447 INFO L125 PetriNetUnfolderBase]: For 1633773/1633773 co-relation queries the response was YES. [2024-06-21 20:24:49,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61402 conditions, 8176 events. 4752/8176 cut-off events. For 1633773/1633773 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 59772 event pairs, 1291 based on Foata normal form. 1/8171 useless extension candidates. Maximal degree in co-relation 61211. Up to 6861 conditions per place. [2024-06-21 20:24:49,732 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 314 selfloop transitions, 190 changer transitions 0/513 dead transitions. [2024-06-21 20:24:49,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 513 transitions, 8934 flow [2024-06-21 20:24:49,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:24:49,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:24:49,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 256 transitions. [2024-06-21 20:24:49,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6095238095238096 [2024-06-21 20:24:49,734 INFO L175 Difference]: Start difference. First operand has 389 places, 479 transitions, 6576 flow. Second operand 10 states and 256 transitions. [2024-06-21 20:24:49,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 513 transitions, 8934 flow [2024-06-21 20:24:56,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 513 transitions, 8528 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-21 20:24:56,867 INFO L231 Difference]: Finished difference. Result has 392 places, 486 transitions, 6701 flow [2024-06-21 20:24:56,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6182, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6701, PETRI_PLACES=392, PETRI_TRANSITIONS=486} [2024-06-21 20:24:56,867 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 349 predicate places. [2024-06-21 20:24:56,868 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 486 transitions, 6701 flow [2024-06-21 20:24:56,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:24:56,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:24:56,868 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] [2024-06-21 20:24:56,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-21 20:24:56,868 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:24:56,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:24:56,869 INFO L85 PathProgramCache]: Analyzing trace with hash 538617559, now seen corresponding path program 16 times [2024-06-21 20:24:56,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:24:56,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422595531] [2024-06-21 20:24:56,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:24:56,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:24:56,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:24:56,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:24:56,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:24:56,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422595531] [2024-06-21 20:24:56,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422595531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:24:56,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:24:56,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:24:56,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8232925] [2024-06-21 20:24:56,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:24:56,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:24:56,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:24:56,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:24:56,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:24:56,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:24:56,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 486 transitions, 6701 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:24:56,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:24:56,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:24:56,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:24:58,878 INFO L124 PetriNetUnfolderBase]: 4746/8180 cut-off events. [2024-06-21 20:24:58,878 INFO L125 PetriNetUnfolderBase]: For 1644306/1644306 co-relation queries the response was YES. [2024-06-21 20:24:58,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61211 conditions, 8180 events. 4746/8180 cut-off events. For 1644306/1644306 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 59838 event pairs, 1301 based on Foata normal form. 2/8176 useless extension candidates. Maximal degree in co-relation 61019. Up to 6856 conditions per place. [2024-06-21 20:24:58,998 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 314 selfloop transitions, 184 changer transitions 0/507 dead transitions. [2024-06-21 20:24:58,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 507 transitions, 8617 flow [2024-06-21 20:24:58,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:24:58,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:24:58,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-21 20:24:58,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6220238095238095 [2024-06-21 20:24:58,999 INFO L175 Difference]: Start difference. First operand has 392 places, 486 transitions, 6701 flow. Second operand 8 states and 209 transitions. [2024-06-21 20:24:58,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 507 transitions, 8617 flow [2024-06-21 20:25:06,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 507 transitions, 8225 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-21 20:25:06,469 INFO L231 Difference]: Finished difference. Result has 393 places, 486 transitions, 6684 flow [2024-06-21 20:25:06,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6309, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6684, PETRI_PLACES=393, PETRI_TRANSITIONS=486} [2024-06-21 20:25:06,470 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 350 predicate places. [2024-06-21 20:25:06,471 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 486 transitions, 6684 flow [2024-06-21 20:25:06,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:25:06,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:25:06,471 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] [2024-06-21 20:25:06,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-21 20:25:06,471 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:25:06,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:25:06,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1187260649, now seen corresponding path program 17 times [2024-06-21 20:25:06,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:25:06,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348050342] [2024-06-21 20:25:06,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:25:06,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:25:06,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:25:06,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:25:06,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:25:06,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348050342] [2024-06-21 20:25:06,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348050342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:25:06,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:25:06,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:25:06,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411579084] [2024-06-21 20:25:06,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:25:06,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:25:06,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:25:06,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:25:06,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:25:06,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:25:06,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 486 transitions, 6684 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:25:06,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:25:06,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:25:06,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:25:08,382 INFO L124 PetriNetUnfolderBase]: 4756/8147 cut-off events. [2024-06-21 20:25:08,382 INFO L125 PetriNetUnfolderBase]: For 1669414/1669414 co-relation queries the response was YES. [2024-06-21 20:25:08,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61387 conditions, 8147 events. 4756/8147 cut-off events. For 1669414/1669414 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 59429 event pairs, 1360 based on Foata normal form. 2/8120 useless extension candidates. Maximal degree in co-relation 61193. Up to 6866 conditions per place. [2024-06-21 20:25:08,507 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 311 selfloop transitions, 184 changer transitions 0/504 dead transitions. [2024-06-21 20:25:08,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 504 transitions, 8667 flow [2024-06-21 20:25:08,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:25:08,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:25:08,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-21 20:25:08,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-21 20:25:08,509 INFO L175 Difference]: Start difference. First operand has 393 places, 486 transitions, 6684 flow. Second operand 7 states and 182 transitions. [2024-06-21 20:25:08,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 504 transitions, 8667 flow [2024-06-21 20:25:18,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 504 transitions, 8283 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 20:25:18,294 INFO L231 Difference]: Finished difference. Result has 393 places, 490 transitions, 6760 flow [2024-06-21 20:25:18,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6306, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6760, PETRI_PLACES=393, PETRI_TRANSITIONS=490} [2024-06-21 20:25:18,294 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 350 predicate places. [2024-06-21 20:25:18,294 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 490 transitions, 6760 flow [2024-06-21 20:25:18,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:25:18,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:25:18,295 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] [2024-06-21 20:25:18,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-21 20:25:18,295 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:25:18,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:25:18,295 INFO L85 PathProgramCache]: Analyzing trace with hash 862542325, now seen corresponding path program 18 times [2024-06-21 20:25:18,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:25:18,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708210329] [2024-06-21 20:25:18,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:25:18,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:25:18,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:25:18,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:25:18,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:25:18,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708210329] [2024-06-21 20:25:18,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708210329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:25:18,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:25:18,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:25:18,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390903179] [2024-06-21 20:25:18,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:25:18,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:25:18,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:25:18,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:25:18,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:25:18,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:25:18,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 490 transitions, 6760 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:25:18,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:25:18,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:25:18,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:25:20,251 INFO L124 PetriNetUnfolderBase]: 4766/8165 cut-off events. [2024-06-21 20:25:20,251 INFO L125 PetriNetUnfolderBase]: For 1691677/1691677 co-relation queries the response was YES. [2024-06-21 20:25:20,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61633 conditions, 8165 events. 4766/8165 cut-off events. For 1691677/1691677 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 59602 event pairs, 1360 based on Foata normal form. 2/8138 useless extension candidates. Maximal degree in co-relation 61438. Up to 6876 conditions per place. [2024-06-21 20:25:20,379 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 313 selfloop transitions, 186 changer transitions 0/508 dead transitions. [2024-06-21 20:25:20,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 508 transitions, 8759 flow [2024-06-21 20:25:20,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:25:20,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:25:20,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-21 20:25:20,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-21 20:25:20,380 INFO L175 Difference]: Start difference. First operand has 393 places, 490 transitions, 6760 flow. Second operand 7 states and 182 transitions. [2024-06-21 20:25:20,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 508 transitions, 8759 flow [2024-06-21 20:25:28,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 508 transitions, 8092 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-21 20:25:28,419 INFO L231 Difference]: Finished difference. Result has 394 places, 494 transitions, 6559 flow [2024-06-21 20:25:28,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6127, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6559, PETRI_PLACES=394, PETRI_TRANSITIONS=494} [2024-06-21 20:25:28,419 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 351 predicate places. [2024-06-21 20:25:28,419 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 494 transitions, 6559 flow [2024-06-21 20:25:28,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:25:28,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:25:28,420 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] [2024-06-21 20:25:28,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-21 20:25:28,420 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:25:28,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:25:28,420 INFO L85 PathProgramCache]: Analyzing trace with hash 509223413, now seen corresponding path program 19 times [2024-06-21 20:25:28,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:25:28,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195308070] [2024-06-21 20:25:28,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:25:28,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:25:28,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:25:28,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:25:28,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:25:28,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195308070] [2024-06-21 20:25:28,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195308070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:25:28,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:25:28,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:25:28,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518875327] [2024-06-21 20:25:28,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:25:28,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:25:28,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:25:28,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:25:28,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:25:28,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:25:28,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 494 transitions, 6559 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:25:28,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:25:28,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:25:28,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:25:30,295 INFO L124 PetriNetUnfolderBase]: 4760/8165 cut-off events. [2024-06-21 20:25:30,295 INFO L125 PetriNetUnfolderBase]: For 1687220/1687220 co-relation queries the response was YES. [2024-06-21 20:25:30,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61283 conditions, 8165 events. 4760/8165 cut-off events. For 1687220/1687220 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 59673 event pairs, 1368 based on Foata normal form. 2/8138 useless extension candidates. Maximal degree in co-relation 61088. Up to 6871 conditions per place. [2024-06-21 20:25:30,420 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 313 selfloop transitions, 186 changer transitions 0/508 dead transitions. [2024-06-21 20:25:30,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 508 transitions, 8477 flow [2024-06-21 20:25:30,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:25:30,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:25:30,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 20:25:30,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-21 20:25:30,421 INFO L175 Difference]: Start difference. First operand has 394 places, 494 transitions, 6559 flow. Second operand 7 states and 180 transitions. [2024-06-21 20:25:30,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 508 transitions, 8477 flow [2024-06-21 20:25:39,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 508 transitions, 8120 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 20:25:39,323 INFO L231 Difference]: Finished difference. Result has 397 places, 494 transitions, 6581 flow [2024-06-21 20:25:39,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6202, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6581, PETRI_PLACES=397, PETRI_TRANSITIONS=494} [2024-06-21 20:25:39,323 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 354 predicate places. [2024-06-21 20:25:39,323 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 494 transitions, 6581 flow [2024-06-21 20:25:39,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:25:39,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:25:39,324 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] [2024-06-21 20:25:39,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-21 20:25:39,324 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:25:39,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:25:39,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1326860125, now seen corresponding path program 7 times [2024-06-21 20:25:39,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:25:39,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166812852] [2024-06-21 20:25:39,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:25:39,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:25:39,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:25:39,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:25:39,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:25:39,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166812852] [2024-06-21 20:25:39,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166812852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:25:39,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:25:39,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:25:39,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478997761] [2024-06-21 20:25:39,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:25:39,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:25:39,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:25:39,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:25:39,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:25:39,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:25:39,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 494 transitions, 6581 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:25:39,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:25:39,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:25:39,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:25:41,320 INFO L124 PetriNetUnfolderBase]: 4796/8237 cut-off events. [2024-06-21 20:25:41,321 INFO L125 PetriNetUnfolderBase]: For 1804859/1804859 co-relation queries the response was YES. [2024-06-21 20:25:41,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62145 conditions, 8237 events. 4796/8237 cut-off events. For 1804859/1804859 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 60347 event pairs, 1303 based on Foata normal form. 10/8233 useless extension candidates. Maximal degree in co-relation 61949. Up to 7284 conditions per place. [2024-06-21 20:25:41,446 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 401 selfloop transitions, 102 changer transitions 0/512 dead transitions. [2024-06-21 20:25:41,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 512 transitions, 7751 flow [2024-06-21 20:25:41,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:25:41,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:25:41,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-21 20:25:41,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-21 20:25:41,447 INFO L175 Difference]: Start difference. First operand has 397 places, 494 transitions, 6581 flow. Second operand 8 states and 198 transitions. [2024-06-21 20:25:41,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 512 transitions, 7751 flow [2024-06-21 20:25:50,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 512 transitions, 7286 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-21 20:25:50,587 INFO L231 Difference]: Finished difference. Result has 397 places, 496 transitions, 6444 flow [2024-06-21 20:25:50,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6116, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6444, PETRI_PLACES=397, PETRI_TRANSITIONS=496} [2024-06-21 20:25:50,587 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 354 predicate places. [2024-06-21 20:25:50,587 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 496 transitions, 6444 flow [2024-06-21 20:25:50,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:25:50,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:25:50,588 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] [2024-06-21 20:25:50,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-21 20:25:50,588 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:25:50,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:25:50,588 INFO L85 PathProgramCache]: Analyzing trace with hash 277623653, now seen corresponding path program 8 times [2024-06-21 20:25:50,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:25:50,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820527474] [2024-06-21 20:25:50,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:25:50,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:25:50,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:25:50,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:25:50,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:25:50,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820527474] [2024-06-21 20:25:50,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820527474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:25:50,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:25:50,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:25:50,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804135923] [2024-06-21 20:25:50,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:25:50,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:25:50,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:25:50,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:25:50,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:25:50,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:25:50,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 496 transitions, 6444 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:25:50,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:25:50,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:25:50,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:25:52,610 INFO L124 PetriNetUnfolderBase]: 4819/8286 cut-off events. [2024-06-21 20:25:52,611 INFO L125 PetriNetUnfolderBase]: For 1806101/1806101 co-relation queries the response was YES. [2024-06-21 20:25:52,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62126 conditions, 8286 events. 4819/8286 cut-off events. For 1806101/1806101 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 60899 event pairs, 1298 based on Foata normal form. 10/8282 useless extension candidates. Maximal degree in co-relation 61931. Up to 7193 conditions per place. [2024-06-21 20:25:52,745 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 403 selfloop transitions, 107 changer transitions 0/519 dead transitions. [2024-06-21 20:25:52,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 519 transitions, 7656 flow [2024-06-21 20:25:52,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:25:52,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:25:52,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-21 20:25:52,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-21 20:25:52,746 INFO L175 Difference]: Start difference. First operand has 397 places, 496 transitions, 6444 flow. Second operand 9 states and 222 transitions. [2024-06-21 20:25:52,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 519 transitions, 7656 flow [2024-06-21 20:26:00,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 519 transitions, 7358 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-21 20:26:00,467 INFO L231 Difference]: Finished difference. Result has 400 places, 498 transitions, 6487 flow [2024-06-21 20:26:00,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6146, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6487, PETRI_PLACES=400, PETRI_TRANSITIONS=498} [2024-06-21 20:26:00,468 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 357 predicate places. [2024-06-21 20:26:00,468 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 498 transitions, 6487 flow [2024-06-21 20:26:00,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:26:00,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:26:00,468 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] [2024-06-21 20:26:00,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-21 20:26:00,468 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:26:00,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:26:00,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1503976565, now seen corresponding path program 20 times [2024-06-21 20:26:00,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:26:00,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939295072] [2024-06-21 20:26:00,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:26:00,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:26:00,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:26:00,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:26:00,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:26:00,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939295072] [2024-06-21 20:26:00,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939295072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:26:00,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:26:00,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:26:00,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472117488] [2024-06-21 20:26:00,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:26:00,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:26:00,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:26:00,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:26:00,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:26:00,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:26:00,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 498 transitions, 6487 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:26:00,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:26:00,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:26:00,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:26:02,425 INFO L124 PetriNetUnfolderBase]: 4813/8262 cut-off events. [2024-06-21 20:26:02,426 INFO L125 PetriNetUnfolderBase]: For 1712991/1712991 co-relation queries the response was YES. [2024-06-21 20:26:02,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61554 conditions, 8262 events. 4813/8262 cut-off events. For 1712991/1712991 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 60670 event pairs, 1375 based on Foata normal form. 2/8237 useless extension candidates. Maximal degree in co-relation 61358. Up to 6959 conditions per place. [2024-06-21 20:26:02,546 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 313 selfloop transitions, 190 changer transitions 0/512 dead transitions. [2024-06-21 20:26:02,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 512 transitions, 8129 flow [2024-06-21 20:26:02,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:26:02,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:26:02,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-21 20:26:02,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6011904761904762 [2024-06-21 20:26:02,547 INFO L175 Difference]: Start difference. First operand has 400 places, 498 transitions, 6487 flow. Second operand 8 states and 202 transitions. [2024-06-21 20:26:02,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 512 transitions, 8129 flow [2024-06-21 20:26:12,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 512 transitions, 7810 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-21 20:26:12,122 INFO L231 Difference]: Finished difference. Result has 401 places, 498 transitions, 6555 flow [2024-06-21 20:26:12,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6168, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6555, PETRI_PLACES=401, PETRI_TRANSITIONS=498} [2024-06-21 20:26:12,122 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 358 predicate places. [2024-06-21 20:26:12,122 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 498 transitions, 6555 flow [2024-06-21 20:26:12,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:26:12,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:26:12,123 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] [2024-06-21 20:26:12,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-21 20:26:12,123 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:26:12,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:26:12,123 INFO L85 PathProgramCache]: Analyzing trace with hash 72995885, now seen corresponding path program 4 times [2024-06-21 20:26:12,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:26:12,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027071522] [2024-06-21 20:26:12,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:26:12,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:26:12,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:26:12,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:26:12,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:26:12,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027071522] [2024-06-21 20:26:12,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027071522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:26:12,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:26:12,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:26:12,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413572143] [2024-06-21 20:26:12,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:26:12,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:26:12,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:26:12,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:26:12,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:26:12,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:26:12,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 498 transitions, 6555 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:26:12,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:26:12,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:26:12,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:26:14,218 INFO L124 PetriNetUnfolderBase]: 4834/8327 cut-off events. [2024-06-21 20:26:14,219 INFO L125 PetriNetUnfolderBase]: For 1753448/1753448 co-relation queries the response was YES. [2024-06-21 20:26:14,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62187 conditions, 8327 events. 4834/8327 cut-off events. For 1753448/1753448 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 61137 event pairs, 1271 based on Foata normal form. 2/8324 useless extension candidates. Maximal degree in co-relation 61990. Up to 7331 conditions per place. [2024-06-21 20:26:14,344 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 433 selfloop transitions, 88 changer transitions 2/532 dead transitions. [2024-06-21 20:26:14,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 532 transitions, 8147 flow [2024-06-21 20:26:14,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:26:14,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:26:14,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-06-21 20:26:14,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6084656084656085 [2024-06-21 20:26:14,368 INFO L175 Difference]: Start difference. First operand has 401 places, 498 transitions, 6555 flow. Second operand 9 states and 230 transitions. [2024-06-21 20:26:14,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 532 transitions, 8147 flow [2024-06-21 20:26:24,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 532 transitions, 7683 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 20:26:24,866 INFO L231 Difference]: Finished difference. Result has 403 places, 502 transitions, 6449 flow [2024-06-21 20:26:24,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6091, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6449, PETRI_PLACES=403, PETRI_TRANSITIONS=502} [2024-06-21 20:26:24,867 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 360 predicate places. [2024-06-21 20:26:24,867 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 502 transitions, 6449 flow [2024-06-21 20:26:24,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:26:24,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:26:24,867 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] [2024-06-21 20:26:24,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-21 20:26:24,868 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:26:24,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:26:24,868 INFO L85 PathProgramCache]: Analyzing trace with hash -636742265, now seen corresponding path program 5 times [2024-06-21 20:26:24,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:26:24,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575191902] [2024-06-21 20:26:24,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:26:24,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:26:24,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:26:24,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:26:24,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:26:24,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575191902] [2024-06-21 20:26:24,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575191902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:26:24,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:26:24,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:26:24,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552360581] [2024-06-21 20:26:24,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:26:24,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:26:24,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:26:24,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:26:24,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:26:24,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:26:24,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 502 transitions, 6449 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:26:24,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:26:24,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:26:24,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:26:26,930 INFO L124 PetriNetUnfolderBase]: 4829/8330 cut-off events. [2024-06-21 20:26:26,931 INFO L125 PetriNetUnfolderBase]: For 1751443/1751443 co-relation queries the response was YES. [2024-06-21 20:26:27,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61700 conditions, 8330 events. 4829/8330 cut-off events. For 1751443/1751443 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 61260 event pairs, 1290 based on Foata normal form. 2/8328 useless extension candidates. Maximal degree in co-relation 61500. Up to 7381 conditions per place. [2024-06-21 20:26:27,050 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 432 selfloop transitions, 83 changer transitions 0/524 dead transitions. [2024-06-21 20:26:27,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 524 transitions, 7533 flow [2024-06-21 20:26:27,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:26:27,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:26:27,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-21 20:26:27,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-06-21 20:26:27,051 INFO L175 Difference]: Start difference. First operand has 403 places, 502 transitions, 6449 flow. Second operand 8 states and 203 transitions. [2024-06-21 20:26:27,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 524 transitions, 7533 flow [2024-06-21 20:26:35,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 524 transitions, 7243 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-21 20:26:35,865 INFO L231 Difference]: Finished difference. Result has 405 places, 502 transitions, 6330 flow [2024-06-21 20:26:35,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6159, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6330, PETRI_PLACES=405, PETRI_TRANSITIONS=502} [2024-06-21 20:26:35,865 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 362 predicate places. [2024-06-21 20:26:35,866 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 502 transitions, 6330 flow [2024-06-21 20:26:35,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:26:35,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:26:35,866 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] [2024-06-21 20:26:35,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-21 20:26:35,866 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:26:35,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:26:35,866 INFO L85 PathProgramCache]: Analyzing trace with hash 163084117, now seen corresponding path program 6 times [2024-06-21 20:26:35,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:26:35,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671928476] [2024-06-21 20:26:35,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:26:35,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:26:35,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:26:35,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:26:35,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:26:35,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671928476] [2024-06-21 20:26:35,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671928476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:26:35,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:26:35,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:26:35,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896094558] [2024-06-21 20:26:35,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:26:35,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:26:35,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:26:35,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:26:35,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:26:35,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:26:35,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 502 transitions, 6330 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:26:35,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:26:35,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:26:35,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:26:38,060 INFO L124 PetriNetUnfolderBase]: 4896/8443 cut-off events. [2024-06-21 20:26:38,061 INFO L125 PetriNetUnfolderBase]: For 1894389/1894389 co-relation queries the response was YES. [2024-06-21 20:26:38,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64169 conditions, 8443 events. 4896/8443 cut-off events. For 1894389/1894389 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 62234 event pairs, 1302 based on Foata normal form. 2/8440 useless extension candidates. Maximal degree in co-relation 63968. Up to 7395 conditions per place. [2024-06-21 20:26:38,197 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 439 selfloop transitions, 90 changer transitions 0/538 dead transitions. [2024-06-21 20:26:38,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 538 transitions, 7956 flow [2024-06-21 20:26:38,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:26:38,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:26:38,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 253 transitions. [2024-06-21 20:26:38,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6023809523809524 [2024-06-21 20:26:38,198 INFO L175 Difference]: Start difference. First operand has 405 places, 502 transitions, 6330 flow. Second operand 10 states and 253 transitions. [2024-06-21 20:26:38,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 538 transitions, 7956 flow [2024-06-21 20:26:48,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 538 transitions, 7770 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 20:26:48,087 INFO L231 Difference]: Finished difference. Result has 409 places, 506 transitions, 6516 flow [2024-06-21 20:26:48,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6144, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6516, PETRI_PLACES=409, PETRI_TRANSITIONS=506} [2024-06-21 20:26:48,088 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 366 predicate places. [2024-06-21 20:26:48,088 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 506 transitions, 6516 flow [2024-06-21 20:26:48,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:26:48,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:26:48,088 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] [2024-06-21 20:26:48,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-21 20:26:48,088 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:26:48,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:26:48,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1297886105, now seen corresponding path program 7 times [2024-06-21 20:26:48,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:26:48,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73579627] [2024-06-21 20:26:48,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:26:48,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:26:48,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:26:48,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:26:48,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:26:48,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73579627] [2024-06-21 20:26:48,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73579627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:26:48,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:26:48,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:26:48,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961123145] [2024-06-21 20:26:48,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:26:48,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:26:48,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:26:48,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:26:48,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:26:48,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:26:48,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 506 transitions, 6516 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:26:48,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:26:48,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:26:48,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:26:50,262 INFO L124 PetriNetUnfolderBase]: 4904/8463 cut-off events. [2024-06-21 20:26:50,262 INFO L125 PetriNetUnfolderBase]: For 1920766/1920766 co-relation queries the response was YES. [2024-06-21 20:26:50,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64704 conditions, 8463 events. 4904/8463 cut-off events. For 1920766/1920766 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 62491 event pairs, 1312 based on Foata normal form. 2/8461 useless extension candidates. Maximal degree in co-relation 64501. Up to 7494 conditions per place. [2024-06-21 20:26:50,394 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 438 selfloop transitions, 85 changer transitions 0/532 dead transitions. [2024-06-21 20:26:50,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 532 transitions, 7713 flow [2024-06-21 20:26:50,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:26:50,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:26:50,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 245 transitions. [2024-06-21 20:26:50,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-21 20:26:50,396 INFO L175 Difference]: Start difference. First operand has 409 places, 506 transitions, 6516 flow. Second operand 10 states and 245 transitions. [2024-06-21 20:26:50,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 532 transitions, 7713 flow [2024-06-21 20:26:59,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 532 transitions, 7451 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-21 20:26:59,728 INFO L231 Difference]: Finished difference. Result has 412 places, 508 transitions, 6526 flow [2024-06-21 20:26:59,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6266, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6526, PETRI_PLACES=412, PETRI_TRANSITIONS=508} [2024-06-21 20:26:59,728 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 369 predicate places. [2024-06-21 20:26:59,728 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 508 transitions, 6526 flow [2024-06-21 20:26:59,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:26:59,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:26:59,729 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] [2024-06-21 20:26:59,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-21 20:26:59,729 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:26:59,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:26:59,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1640124245, now seen corresponding path program 8 times [2024-06-21 20:26:59,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:26:59,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500663776] [2024-06-21 20:26:59,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:26:59,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:26:59,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:26:59,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:26:59,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:26:59,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500663776] [2024-06-21 20:26:59,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500663776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:26:59,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:26:59,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:26:59,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967846063] [2024-06-21 20:26:59,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:26:59,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:26:59,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:26:59,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:26:59,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:26:59,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:26:59,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 508 transitions, 6526 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:26:59,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:26:59,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:26:59,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:27:01,897 INFO L124 PetriNetUnfolderBase]: 4912/8479 cut-off events. [2024-06-21 20:27:01,897 INFO L125 PetriNetUnfolderBase]: For 1944067/1944067 co-relation queries the response was YES. [2024-06-21 20:27:01,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64809 conditions, 8479 events. 4912/8479 cut-off events. For 1944067/1944067 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 62671 event pairs, 1118 based on Foata normal form. 2/8477 useless extension candidates. Maximal degree in co-relation 64605. Up to 6669 conditions per place. [2024-06-21 20:27:02,021 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 428 selfloop transitions, 109 changer transitions 0/546 dead transitions. [2024-06-21 20:27:02,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 546 transitions, 8423 flow [2024-06-21 20:27:02,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:27:02,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:27:02,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 237 transitions. [2024-06-21 20:27:02,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.626984126984127 [2024-06-21 20:27:02,023 INFO L175 Difference]: Start difference. First operand has 412 places, 508 transitions, 6526 flow. Second operand 9 states and 237 transitions. [2024-06-21 20:27:02,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 546 transitions, 8423 flow [2024-06-21 20:27:12,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 546 transitions, 8190 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-21 20:27:12,912 INFO L231 Difference]: Finished difference. Result has 413 places, 510 transitions, 6603 flow [2024-06-21 20:27:12,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6293, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6603, PETRI_PLACES=413, PETRI_TRANSITIONS=510} [2024-06-21 20:27:12,913 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 370 predicate places. [2024-06-21 20:27:12,913 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 510 transitions, 6603 flow [2024-06-21 20:27:12,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:27:12,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:27:12,913 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] [2024-06-21 20:27:12,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-21 20:27:12,913 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:27:12,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:27:12,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1189266169, now seen corresponding path program 9 times [2024-06-21 20:27:12,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:27:12,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214881682] [2024-06-21 20:27:12,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:27:12,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:27:12,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:27:12,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:27:12,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:27:12,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214881682] [2024-06-21 20:27:12,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214881682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:27:12,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:27:12,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:27:12,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762199728] [2024-06-21 20:27:12,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:27:12,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:27:12,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:27:12,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:27:12,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:27:13,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:27:13,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 510 transitions, 6603 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:27:13,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:27:13,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:27:13,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:27:15,190 INFO L124 PetriNetUnfolderBase]: 4887/8432 cut-off events. [2024-06-21 20:27:15,190 INFO L125 PetriNetUnfolderBase]: For 1944397/1944397 co-relation queries the response was YES. [2024-06-21 20:27:15,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63628 conditions, 8432 events. 4887/8432 cut-off events. For 1944397/1944397 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 62229 event pairs, 1129 based on Foata normal form. 8/8436 useless extension candidates. Maximal degree in co-relation 63423. Up to 6655 conditions per place. [2024-06-21 20:27:15,325 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 428 selfloop transitions, 106 changer transitions 0/543 dead transitions. [2024-06-21 20:27:15,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 543 transitions, 8091 flow [2024-06-21 20:27:15,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:27:15,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:27:15,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-06-21 20:27:15,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-21 20:27:15,326 INFO L175 Difference]: Start difference. First operand has 413 places, 510 transitions, 6603 flow. Second operand 9 states and 234 transitions. [2024-06-21 20:27:15,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 543 transitions, 8091 flow [2024-06-21 20:27:25,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 543 transitions, 7722 flow, removed 71 selfloop flow, removed 9 redundant places. [2024-06-21 20:27:25,253 INFO L231 Difference]: Finished difference. Result has 413 places, 510 transitions, 6452 flow [2024-06-21 20:27:25,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6234, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6452, PETRI_PLACES=413, PETRI_TRANSITIONS=510} [2024-06-21 20:27:25,254 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 370 predicate places. [2024-06-21 20:27:25,254 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 510 transitions, 6452 flow [2024-06-21 20:27:25,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:27:25,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:27:25,254 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] [2024-06-21 20:27:25,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-21 20:27:25,255 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:27:25,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:27:25,255 INFO L85 PathProgramCache]: Analyzing trace with hash 104027989, now seen corresponding path program 10 times [2024-06-21 20:27:25,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:27:25,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954875007] [2024-06-21 20:27:25,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:27:25,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:27:25,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:27:25,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:27:25,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:27:25,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954875007] [2024-06-21 20:27:25,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954875007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:27:25,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:27:25,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:27:25,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438298248] [2024-06-21 20:27:25,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:27:25,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:27:25,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:27:25,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:27:25,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:27:25,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:27:25,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 510 transitions, 6452 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:27:25,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:27:25,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:27:25,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:27:27,367 INFO L124 PetriNetUnfolderBase]: 4864/8405 cut-off events. [2024-06-21 20:27:27,368 INFO L125 PetriNetUnfolderBase]: For 1862948/1862948 co-relation queries the response was YES. [2024-06-21 20:27:27,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61335 conditions, 8405 events. 4864/8405 cut-off events. For 1862948/1862948 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 62075 event pairs, 1276 based on Foata normal form. 10/8411 useless extension candidates. Maximal degree in co-relation 61132. Up to 7156 conditions per place. [2024-06-21 20:27:27,503 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 440 selfloop transitions, 88 changer transitions 0/537 dead transitions. [2024-06-21 20:27:27,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 537 transitions, 7914 flow [2024-06-21 20:27:27,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:27:27,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:27:27,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-21 20:27:27,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-21 20:27:27,504 INFO L175 Difference]: Start difference. First operand has 413 places, 510 transitions, 6452 flow. Second operand 8 states and 208 transitions. [2024-06-21 20:27:27,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 537 transitions, 7914 flow [2024-06-21 20:27:36,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 537 transitions, 7627 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-21 20:27:36,572 INFO L231 Difference]: Finished difference. Result has 413 places, 510 transitions, 6348 flow [2024-06-21 20:27:36,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6165, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6348, PETRI_PLACES=413, PETRI_TRANSITIONS=510} [2024-06-21 20:27:36,573 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 370 predicate places. [2024-06-21 20:27:36,573 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 510 transitions, 6348 flow [2024-06-21 20:27:36,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:27:36,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:27:36,573 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] [2024-06-21 20:27:36,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-21 20:27:36,573 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:27:36,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:27:36,574 INFO L85 PathProgramCache]: Analyzing trace with hash 93552469, now seen corresponding path program 11 times [2024-06-21 20:27:36,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:27:36,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294420848] [2024-06-21 20:27:36,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:27:36,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:27:36,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:27:36,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:27:36,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:27:36,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294420848] [2024-06-21 20:27:36,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294420848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:27:36,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:27:36,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:27:36,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948007024] [2024-06-21 20:27:36,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:27:36,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:27:36,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:27:36,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:27:36,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:27:36,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:27:36,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 510 transitions, 6348 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:27:36,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:27:36,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:27:36,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:27:38,719 INFO L124 PetriNetUnfolderBase]: 4834/8357 cut-off events. [2024-06-21 20:27:38,720 INFO L125 PetriNetUnfolderBase]: For 1756014/1756014 co-relation queries the response was YES. [2024-06-21 20:27:38,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59027 conditions, 8357 events. 4834/8357 cut-off events. For 1756014/1756014 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 61726 event pairs, 1282 based on Foata normal form. 10/8363 useless extension candidates. Maximal degree in co-relation 58823. Up to 7356 conditions per place. [2024-06-21 20:27:38,852 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 441 selfloop transitions, 82 changer transitions 0/532 dead transitions. [2024-06-21 20:27:38,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 532 transitions, 7460 flow [2024-06-21 20:27:38,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:27:38,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:27:38,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-21 20:27:38,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-21 20:27:38,853 INFO L175 Difference]: Start difference. First operand has 413 places, 510 transitions, 6348 flow. Second operand 8 states and 204 transitions. [2024-06-21 20:27:38,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 532 transitions, 7460 flow [2024-06-21 20:27:49,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 532 transitions, 7240 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-21 20:27:49,088 INFO L231 Difference]: Finished difference. Result has 415 places, 510 transitions, 6298 flow [2024-06-21 20:27:49,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6128, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6298, PETRI_PLACES=415, PETRI_TRANSITIONS=510} [2024-06-21 20:27:49,089 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 372 predicate places. [2024-06-21 20:27:49,089 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 510 transitions, 6298 flow [2024-06-21 20:27:49,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:27:49,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:27:49,089 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] [2024-06-21 20:27:49,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-21 20:27:49,090 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:27:49,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:27:49,090 INFO L85 PathProgramCache]: Analyzing trace with hash -765229607, now seen corresponding path program 12 times [2024-06-21 20:27:49,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:27:49,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719640070] [2024-06-21 20:27:49,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:27:49,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:27:49,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:27:49,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:27:49,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:27:49,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719640070] [2024-06-21 20:27:49,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719640070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:27:49,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:27:49,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:27:49,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075934049] [2024-06-21 20:27:49,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:27:49,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:27:49,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:27:49,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:27:49,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:27:49,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:27:49,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 510 transitions, 6298 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:27:49,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:27:49,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:27:49,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:27:51,288 INFO L124 PetriNetUnfolderBase]: 4870/8401 cut-off events. [2024-06-21 20:27:51,288 INFO L125 PetriNetUnfolderBase]: For 1777333/1777333 co-relation queries the response was YES. [2024-06-21 20:27:51,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59363 conditions, 8401 events. 4870/8401 cut-off events. For 1777333/1777333 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 62137 event pairs, 1322 based on Foata normal form. 10/8393 useless extension candidates. Maximal degree in co-relation 59158. Up to 7412 conditions per place. [2024-06-21 20:27:51,423 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 432 selfloop transitions, 86 changer transitions 0/527 dead transitions. [2024-06-21 20:27:51,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 527 transitions, 7465 flow [2024-06-21 20:27:51,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:27:51,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:27:51,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 20:27:51,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2024-06-21 20:27:51,425 INFO L175 Difference]: Start difference. First operand has 415 places, 510 transitions, 6298 flow. Second operand 7 states and 177 transitions. [2024-06-21 20:27:51,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 527 transitions, 7465 flow [2024-06-21 20:28:01,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 527 transitions, 7251 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 20:28:01,567 INFO L231 Difference]: Finished difference. Result has 413 places, 512 transitions, 6349 flow [2024-06-21 20:28:01,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6084, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6349, PETRI_PLACES=413, PETRI_TRANSITIONS=512} [2024-06-21 20:28:01,568 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 370 predicate places. [2024-06-21 20:28:01,568 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 512 transitions, 6349 flow [2024-06-21 20:28:01,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:28:01,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:28:01,568 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] [2024-06-21 20:28:01,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-21 20:28:01,569 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:28:01,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:28:01,569 INFO L85 PathProgramCache]: Analyzing trace with hash 519351671, now seen corresponding path program 13 times [2024-06-21 20:28:01,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:28:01,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606654068] [2024-06-21 20:28:01,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:28:01,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:28:01,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:28:01,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:28:01,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:28:01,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606654068] [2024-06-21 20:28:01,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606654068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:28:01,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:28:01,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:28:01,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093063270] [2024-06-21 20:28:01,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:28:01,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:28:01,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:28:01,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:28:01,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:28:01,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:28:01,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 512 transitions, 6349 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:28:01,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:28:01,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:28:01,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:28:03,661 INFO L124 PetriNetUnfolderBase]: 4906/8465 cut-off events. [2024-06-21 20:28:03,661 INFO L125 PetriNetUnfolderBase]: For 1802254/1802254 co-relation queries the response was YES. [2024-06-21 20:28:03,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60031 conditions, 8465 events. 4906/8465 cut-off events. For 1802254/1802254 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 62707 event pairs, 1330 based on Foata normal form. 10/8457 useless extension candidates. Maximal degree in co-relation 59825. Up to 7468 conditions per place. [2024-06-21 20:28:03,783 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 438 selfloop transitions, 82 changer transitions 0/529 dead transitions. [2024-06-21 20:28:03,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 529 transitions, 7524 flow [2024-06-21 20:28:03,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:28:03,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:28:03,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 20:28:03,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-21 20:28:03,784 INFO L175 Difference]: Start difference. First operand has 413 places, 512 transitions, 6349 flow. Second operand 7 states and 176 transitions. [2024-06-21 20:28:03,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 529 transitions, 7524 flow [2024-06-21 20:28:11,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 529 transitions, 7298 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-21 20:28:11,508 INFO L231 Difference]: Finished difference. Result has 415 places, 514 transitions, 6384 flow [2024-06-21 20:28:11,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6123, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6384, PETRI_PLACES=415, PETRI_TRANSITIONS=514} [2024-06-21 20:28:11,508 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 372 predicate places. [2024-06-21 20:28:11,508 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 514 transitions, 6384 flow [2024-06-21 20:28:11,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:28:11,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:28:11,509 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] [2024-06-21 20:28:11,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-21 20:28:11,509 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:28:11,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:28:11,509 INFO L85 PathProgramCache]: Analyzing trace with hash 519707861, now seen corresponding path program 14 times [2024-06-21 20:28:11,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:28:11,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530210029] [2024-06-21 20:28:11,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:28:11,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:28:11,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:28:11,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:28:11,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:28:11,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530210029] [2024-06-21 20:28:11,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530210029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:28:11,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:28:11,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:28:11,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193061832] [2024-06-21 20:28:11,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:28:11,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:28:11,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:28:11,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:28:11,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:28:11,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:28:11,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 514 transitions, 6384 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:28:11,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:28:11,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:28:11,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:28:13,655 INFO L124 PetriNetUnfolderBase]: 4876/8409 cut-off events. [2024-06-21 20:28:13,655 INFO L125 PetriNetUnfolderBase]: For 1689769/1689769 co-relation queries the response was YES. [2024-06-21 20:28:13,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57903 conditions, 8409 events. 4876/8409 cut-off events. For 1689769/1689769 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 62167 event pairs, 1300 based on Foata normal form. 10/8401 useless extension candidates. Maximal degree in co-relation 57696. Up to 7104 conditions per place. [2024-06-21 20:28:13,792 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 436 selfloop transitions, 88 changer transitions 0/533 dead transitions. [2024-06-21 20:28:13,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 533 transitions, 7502 flow [2024-06-21 20:28:13,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:28:13,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:28:13,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-21 20:28:13,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-21 20:28:13,794 INFO L175 Difference]: Start difference. First operand has 415 places, 514 transitions, 6384 flow. Second operand 7 states and 179 transitions. [2024-06-21 20:28:13,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 533 transitions, 7502 flow [2024-06-21 20:28:22,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 533 transitions, 7232 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-21 20:28:22,594 INFO L231 Difference]: Finished difference. Result has 417 places, 514 transitions, 6298 flow [2024-06-21 20:28:22,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6114, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6298, PETRI_PLACES=417, PETRI_TRANSITIONS=514} [2024-06-21 20:28:22,594 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 374 predicate places. [2024-06-21 20:28:22,594 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 514 transitions, 6298 flow [2024-06-21 20:28:22,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:28:22,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:28:22,595 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] [2024-06-21 20:28:22,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-21 20:28:22,595 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:28:22,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:28:22,595 INFO L85 PathProgramCache]: Analyzing trace with hash -857442783, now seen corresponding path program 1 times [2024-06-21 20:28:22,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:28:22,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106487646] [2024-06-21 20:28:22,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:28:22,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:28:22,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:28:22,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:28:22,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:28:22,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106487646] [2024-06-21 20:28:22,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106487646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:28:22,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:28:22,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:28:22,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382366882] [2024-06-21 20:28:22,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:28:22,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:28:22,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:28:22,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:28:22,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:28:22,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:28:22,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 514 transitions, 6298 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:28:22,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:28:22,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:28:22,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:28:24,711 INFO L124 PetriNetUnfolderBase]: 4929/8504 cut-off events. [2024-06-21 20:28:24,711 INFO L125 PetriNetUnfolderBase]: For 1736462/1736462 co-relation queries the response was YES. [2024-06-21 20:28:24,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59401 conditions, 8504 events. 4929/8504 cut-off events. For 1736462/1736462 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 62931 event pairs, 1076 based on Foata normal form. 6/8504 useless extension candidates. Maximal degree in co-relation 59193. Up to 7061 conditions per place. [2024-06-21 20:28:24,850 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 453 selfloop transitions, 83 changer transitions 0/545 dead transitions. [2024-06-21 20:28:24,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 545 transitions, 8200 flow [2024-06-21 20:28:24,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:28:24,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:28:24,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-21 20:28:24,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6326530612244898 [2024-06-21 20:28:24,851 INFO L175 Difference]: Start difference. First operand has 417 places, 514 transitions, 6298 flow. Second operand 7 states and 186 transitions. [2024-06-21 20:28:24,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 545 transitions, 8200 flow [2024-06-21 20:28:34,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 545 transitions, 7990 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 20:28:34,691 INFO L231 Difference]: Finished difference. Result has 418 places, 516 transitions, 6341 flow [2024-06-21 20:28:34,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6088, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6341, PETRI_PLACES=418, PETRI_TRANSITIONS=516} [2024-06-21 20:28:34,691 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-21 20:28:34,691 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 516 transitions, 6341 flow [2024-06-21 20:28:34,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:28:34,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:28:34,692 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] [2024-06-21 20:28:34,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-21 20:28:34,692 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:28:34,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:28:34,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1672288161, now seen corresponding path program 2 times [2024-06-21 20:28:34,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:28:34,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697117861] [2024-06-21 20:28:34,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:28:34,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:28:34,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:28:34,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:28:34,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:28:34,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697117861] [2024-06-21 20:28:34,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697117861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:28:34,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:28:34,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:28:34,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884720205] [2024-06-21 20:28:34,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:28:34,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:28:34,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:28:34,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:28:34,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:28:34,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:28:34,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 516 transitions, 6341 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:28:34,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:28:34,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:28:34,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:28:36,881 INFO L124 PetriNetUnfolderBase]: 4995/8634 cut-off events. [2024-06-21 20:28:36,882 INFO L125 PetriNetUnfolderBase]: For 1867151/1867151 co-relation queries the response was YES. [2024-06-21 20:28:36,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61826 conditions, 8634 events. 4995/8634 cut-off events. For 1867151/1867151 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 64158 event pairs, 1078 based on Foata normal form. 6/8634 useless extension candidates. Maximal degree in co-relation 61617. Up to 7097 conditions per place. [2024-06-21 20:28:37,020 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 452 selfloop transitions, 90 changer transitions 0/551 dead transitions. [2024-06-21 20:28:37,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 551 transitions, 8279 flow [2024-06-21 20:28:37,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:28:37,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:28:37,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-21 20:28:37,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6564625850340136 [2024-06-21 20:28:37,022 INFO L175 Difference]: Start difference. First operand has 418 places, 516 transitions, 6341 flow. Second operand 7 states and 193 transitions. [2024-06-21 20:28:37,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 551 transitions, 8279 flow [2024-06-21 20:28:48,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 551 transitions, 8132 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-21 20:28:48,100 INFO L231 Difference]: Finished difference. Result has 422 places, 518 transitions, 6464 flow [2024-06-21 20:28:48,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6200, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6464, PETRI_PLACES=422, PETRI_TRANSITIONS=518} [2024-06-21 20:28:48,101 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 379 predicate places. [2024-06-21 20:28:48,101 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 518 transitions, 6464 flow [2024-06-21 20:28:48,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:28:48,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:28:48,101 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] [2024-06-21 20:28:48,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-21 20:28:48,101 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:28:48,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:28:48,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1998663585, now seen corresponding path program 3 times [2024-06-21 20:28:48,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:28:48,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050289378] [2024-06-21 20:28:48,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:28:48,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:28:48,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:28:48,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:28:48,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:28:48,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050289378] [2024-06-21 20:28:48,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050289378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:28:48,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:28:48,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:28:48,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020267158] [2024-06-21 20:28:48,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:28:48,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:28:48,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:28:48,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:28:48,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:28:48,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:28:48,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 518 transitions, 6464 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:28:48,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:28:48,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:28:48,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:28:50,340 INFO L124 PetriNetUnfolderBase]: 4982/8603 cut-off events. [2024-06-21 20:28:50,340 INFO L125 PetriNetUnfolderBase]: For 1805740/1805740 co-relation queries the response was YES. [2024-06-21 20:28:50,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60695 conditions, 8603 events. 4982/8603 cut-off events. For 1805740/1805740 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 63971 event pairs, 1296 based on Foata normal form. 6/8596 useless extension candidates. Maximal degree in co-relation 60485. Up to 7570 conditions per place. [2024-06-21 20:28:50,478 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 466 selfloop transitions, 68 changer transitions 0/543 dead transitions. [2024-06-21 20:28:50,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 543 transitions, 7942 flow [2024-06-21 20:28:50,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:28:50,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:28:50,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-21 20:28:50,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292517006802721 [2024-06-21 20:28:50,479 INFO L175 Difference]: Start difference. First operand has 422 places, 518 transitions, 6464 flow. Second operand 7 states and 185 transitions. [2024-06-21 20:28:50,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 543 transitions, 7942 flow [2024-06-21 20:29:01,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 543 transitions, 7781 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-21 20:29:01,475 INFO L231 Difference]: Finished difference. Result has 426 places, 518 transitions, 6443 flow [2024-06-21 20:29:01,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6303, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6443, PETRI_PLACES=426, PETRI_TRANSITIONS=518} [2024-06-21 20:29:01,476 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 383 predicate places. [2024-06-21 20:29:01,476 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 518 transitions, 6443 flow [2024-06-21 20:29:01,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:29:01,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:29:01,476 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] [2024-06-21 20:29:01,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-21 20:29:01,476 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:29:01,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:29:01,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1999019775, now seen corresponding path program 4 times [2024-06-21 20:29:01,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:29:01,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933092005] [2024-06-21 20:29:01,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:29:01,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:29:01,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:29:01,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:29:01,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:29:01,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933092005] [2024-06-21 20:29:01,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933092005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:29:01,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:29:01,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:29:01,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30132944] [2024-06-21 20:29:01,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:29:01,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:29:01,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:29:01,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:29:01,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:29:01,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:29:01,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 518 transitions, 6443 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:29:01,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:29:01,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:29:01,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:29:03,760 INFO L124 PetriNetUnfolderBase]: 5010/8656 cut-off events. [2024-06-21 20:29:03,760 INFO L125 PetriNetUnfolderBase]: For 1854833/1854833 co-relation queries the response was YES. [2024-06-21 20:29:03,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60873 conditions, 8656 events. 5010/8656 cut-off events. For 1854833/1854833 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 64425 event pairs, 1315 based on Foata normal form. 8/8658 useless extension candidates. Maximal degree in co-relation 60662. Up to 7720 conditions per place. [2024-06-21 20:29:03,892 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 466 selfloop transitions, 62 changer transitions 0/537 dead transitions. [2024-06-21 20:29:03,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 537 transitions, 7600 flow [2024-06-21 20:29:03,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:29:03,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:29:03,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 20:29:03,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-21 20:29:03,894 INFO L175 Difference]: Start difference. First operand has 426 places, 518 transitions, 6443 flow. Second operand 7 states and 180 transitions. [2024-06-21 20:29:03,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 537 transitions, 7600 flow [2024-06-21 20:29:15,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 537 transitions, 7371 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 20:29:15,686 INFO L231 Difference]: Finished difference. Result has 426 places, 519 transitions, 6394 flow [2024-06-21 20:29:15,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6217, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6394, PETRI_PLACES=426, PETRI_TRANSITIONS=519} [2024-06-21 20:29:15,687 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 383 predicate places. [2024-06-21 20:29:15,687 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 519 transitions, 6394 flow [2024-06-21 20:29:15,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:29:15,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:29:15,687 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] [2024-06-21 20:29:15,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-21 20:29:15,688 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:29:15,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:29:15,688 INFO L85 PathProgramCache]: Analyzing trace with hash -2042303971, now seen corresponding path program 5 times [2024-06-21 20:29:15,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:29:15,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34825509] [2024-06-21 20:29:15,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:29:15,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:29:15,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:29:15,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:29:15,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:29:15,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34825509] [2024-06-21 20:29:15,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34825509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:29:15,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:29:15,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:29:15,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895572890] [2024-06-21 20:29:15,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:29:15,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:29:15,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:29:15,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:29:15,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:29:15,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:29:15,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 519 transitions, 6394 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:29:15,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:29:15,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:29:15,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:29:18,003 INFO L124 PetriNetUnfolderBase]: 4992/8644 cut-off events. [2024-06-21 20:29:18,004 INFO L125 PetriNetUnfolderBase]: For 1762844/1762844 co-relation queries the response was YES. [2024-06-21 20:29:18,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59282 conditions, 8644 events. 4992/8644 cut-off events. For 1762844/1762844 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 64423 event pairs, 1211 based on Foata normal form. 8/8646 useless extension candidates. Maximal degree in co-relation 59070. Up to 7484 conditions per place. [2024-06-21 20:29:18,144 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 461 selfloop transitions, 72 changer transitions 0/542 dead transitions. [2024-06-21 20:29:18,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 542 transitions, 7874 flow [2024-06-21 20:29:18,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:29:18,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:29:18,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-21 20:29:18,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-06-21 20:29:18,145 INFO L175 Difference]: Start difference. First operand has 426 places, 519 transitions, 6394 flow. Second operand 7 states and 184 transitions. [2024-06-21 20:29:18,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 542 transitions, 7874 flow [2024-06-21 20:29:29,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 542 transitions, 7705 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 20:29:29,376 INFO L231 Difference]: Finished difference. Result has 428 places, 519 transitions, 6377 flow [2024-06-21 20:29:29,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6225, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6377, PETRI_PLACES=428, PETRI_TRANSITIONS=519} [2024-06-21 20:29:29,376 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 385 predicate places. [2024-06-21 20:29:29,376 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 519 transitions, 6377 flow [2024-06-21 20:29:29,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:29:29,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:29:29,377 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] [2024-06-21 20:29:29,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-21 20:29:29,377 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:29:29,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:29:29,377 INFO L85 PathProgramCache]: Analyzing trace with hash -2039447011, now seen corresponding path program 6 times [2024-06-21 20:29:29,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:29:29,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411760399] [2024-06-21 20:29:29,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:29:29,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:29:29,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:29:29,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:29:29,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:29:29,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411760399] [2024-06-21 20:29:29,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411760399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:29:29,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:29:29,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:29:29,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091333074] [2024-06-21 20:29:29,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:29:29,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:29:29,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:29:29,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:29:29,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:29:29,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:29:29,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 519 transitions, 6377 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:29:29,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:29:29,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:29:29,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:29:31,661 INFO L124 PetriNetUnfolderBase]: 4974/8614 cut-off events. [2024-06-21 20:29:31,661 INFO L125 PetriNetUnfolderBase]: For 1668029/1668029 co-relation queries the response was YES. [2024-06-21 20:29:31,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57566 conditions, 8614 events. 4974/8614 cut-off events. For 1668029/1668029 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 64219 event pairs, 1301 based on Foata normal form. 8/8616 useless extension candidates. Maximal degree in co-relation 57353. Up to 7668 conditions per place. [2024-06-21 20:29:31,796 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 468 selfloop transitions, 60 changer transitions 0/537 dead transitions. [2024-06-21 20:29:31,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 537 transitions, 7489 flow [2024-06-21 20:29:31,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:29:31,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:29:31,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 20:29:31,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-21 20:29:31,797 INFO L175 Difference]: Start difference. First operand has 428 places, 519 transitions, 6377 flow. Second operand 7 states and 180 transitions. [2024-06-21 20:29:31,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 537 transitions, 7489 flow [2024-06-21 20:29:41,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 537 transitions, 7271 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 20:29:41,353 INFO L231 Difference]: Finished difference. Result has 429 places, 519 transitions, 6288 flow [2024-06-21 20:29:41,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6159, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6288, PETRI_PLACES=429, PETRI_TRANSITIONS=519} [2024-06-21 20:29:41,353 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 386 predicate places. [2024-06-21 20:29:41,353 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 519 transitions, 6288 flow [2024-06-21 20:29:41,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:29:41,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:29:41,354 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] [2024-06-21 20:29:41,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-21 20:29:41,354 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:29:41,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:29:41,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1923694697, now seen corresponding path program 1 times [2024-06-21 20:29:41,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:29:41,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285884497] [2024-06-21 20:29:41,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:29:41,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:29:41,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:29:41,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:29:41,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:29:41,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285884497] [2024-06-21 20:29:41,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285884497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:29:41,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:29:41,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:29:41,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381491633] [2024-06-21 20:29:41,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:29:41,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:29:41,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:29:41,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:29:41,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:29:41,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:29:41,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 519 transitions, 6288 flow. Second operand has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:29:41,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:29:41,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:29:41,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:29:43,719 INFO L124 PetriNetUnfolderBase]: 4995/8653 cut-off events. [2024-06-21 20:29:43,719 INFO L125 PetriNetUnfolderBase]: For 1611591/1611591 co-relation queries the response was YES. [2024-06-21 20:29:43,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57817 conditions, 8653 events. 4995/8653 cut-off events. For 1611591/1611591 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 64624 event pairs, 1304 based on Foata normal form. 1/8648 useless extension candidates. Maximal degree in co-relation 57603. Up to 7567 conditions per place. [2024-06-21 20:29:43,850 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 421 selfloop transitions, 118 changer transitions 0/548 dead transitions. [2024-06-21 20:29:43,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 548 transitions, 8222 flow [2024-06-21 20:29:43,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:29:43,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:29:43,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-21 20:29:43,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6220238095238095 [2024-06-21 20:29:43,851 INFO L175 Difference]: Start difference. First operand has 429 places, 519 transitions, 6288 flow. Second operand 8 states and 209 transitions. [2024-06-21 20:29:43,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 548 transitions, 8222 flow [2024-06-21 20:29:55,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 548 transitions, 8058 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 20:29:55,455 INFO L231 Difference]: Finished difference. Result has 432 places, 528 transitions, 6600 flow [2024-06-21 20:29:55,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6124, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6600, PETRI_PLACES=432, PETRI_TRANSITIONS=528} [2024-06-21 20:29:55,456 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 389 predicate places. [2024-06-21 20:29:55,456 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 528 transitions, 6600 flow [2024-06-21 20:29:55,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:29:55,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:29:55,457 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] [2024-06-21 20:29:55,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-21 20:29:55,457 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:29:55,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:29:55,457 INFO L85 PathProgramCache]: Analyzing trace with hash 973564511, now seen corresponding path program 2 times [2024-06-21 20:29:55,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:29:55,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425818637] [2024-06-21 20:29:55,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:29:55,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:29:55,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:29:55,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:29:55,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:29:55,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425818637] [2024-06-21 20:29:55,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425818637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:29:55,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:29:55,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:29:55,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647632959] [2024-06-21 20:29:55,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:29:55,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:29:55,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:29:55,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:29:55,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:29:55,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:29:55,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 528 transitions, 6600 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:29:55,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:29:55,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:29:55,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:29:57,664 INFO L124 PetriNetUnfolderBase]: 5000/8654 cut-off events. [2024-06-21 20:29:57,664 INFO L125 PetriNetUnfolderBase]: For 1630511/1630511 co-relation queries the response was YES. [2024-06-21 20:29:57,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58349 conditions, 8654 events. 5000/8654 cut-off events. For 1630511/1630511 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 64535 event pairs, 1304 based on Foata normal form. 1/8649 useless extension candidates. Maximal degree in co-relation 58132. Up to 7573 conditions per place. [2024-06-21 20:29:57,799 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 411 selfloop transitions, 127 changer transitions 0/547 dead transitions. [2024-06-21 20:29:57,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 547 transitions, 8448 flow [2024-06-21 20:29:57,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:29:57,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:29:57,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-21 20:29:57,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-06-21 20:29:57,800 INFO L175 Difference]: Start difference. First operand has 432 places, 528 transitions, 6600 flow. Second operand 7 states and 184 transitions. [2024-06-21 20:29:57,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 547 transitions, 8448 flow [2024-06-21 20:30:09,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 547 transitions, 8274 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 20:30:09,726 INFO L231 Difference]: Finished difference. Result has 434 places, 531 transitions, 6749 flow [2024-06-21 20:30:09,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6433, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6749, PETRI_PLACES=434, PETRI_TRANSITIONS=531} [2024-06-21 20:30:09,726 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-21 20:30:09,726 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 531 transitions, 6749 flow [2024-06-21 20:30:09,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:30:09,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:09,727 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] [2024-06-21 20:30:09,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-21 20:30:09,727 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:30:09,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:09,727 INFO L85 PathProgramCache]: Analyzing trace with hash 973357121, now seen corresponding path program 3 times [2024-06-21 20:30:09,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:09,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554601843] [2024-06-21 20:30:09,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:09,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:09,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:09,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:30:09,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:09,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554601843] [2024-06-21 20:30:09,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554601843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:09,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:09,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:30:09,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121540494] [2024-06-21 20:30:09,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:09,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:30:09,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:09,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:30:09,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:30:09,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:30:09,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 531 transitions, 6749 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:30:09,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:09,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:30:09,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:11,903 INFO L124 PetriNetUnfolderBase]: 4997/8650 cut-off events. [2024-06-21 20:30:11,904 INFO L125 PetriNetUnfolderBase]: For 1616959/1616959 co-relation queries the response was YES. [2024-06-21 20:30:12,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58211 conditions, 8650 events. 4997/8650 cut-off events. For 1616959/1616959 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 64583 event pairs, 1304 based on Foata normal form. 1/8645 useless extension candidates. Maximal degree in co-relation 57994. Up to 7570 conditions per place. [2024-06-21 20:30:12,046 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 419 selfloop transitions, 118 changer transitions 0/546 dead transitions. [2024-06-21 20:30:12,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 546 transitions, 8199 flow [2024-06-21 20:30:12,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:30:12,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:30:12,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-21 20:30:12,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-21 20:30:12,047 INFO L175 Difference]: Start difference. First operand has 434 places, 531 transitions, 6749 flow. Second operand 7 states and 182 transitions. [2024-06-21 20:30:12,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 546 transitions, 8199 flow [2024-06-21 20:30:24,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 546 transitions, 7967 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 20:30:24,483 INFO L231 Difference]: Finished difference. Result has 436 places, 531 transitions, 6769 flow [2024-06-21 20:30:24,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6519, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6769, PETRI_PLACES=436, PETRI_TRANSITIONS=531} [2024-06-21 20:30:24,484 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 393 predicate places. [2024-06-21 20:30:24,484 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 531 transitions, 6769 flow [2024-06-21 20:30:24,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:30:24,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:24,485 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] [2024-06-21 20:30:24,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-21 20:30:24,485 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:30:24,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:24,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1998817345, now seen corresponding path program 4 times [2024-06-21 20:30:24,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:24,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157621160] [2024-06-21 20:30:24,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:24,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:24,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:24,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:30:24,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:24,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157621160] [2024-06-21 20:30:24,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157621160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:24,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:24,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:30:24,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782348547] [2024-06-21 20:30:24,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:24,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:30:24,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:24,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:30:24,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:30:24,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:30:24,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 531 transitions, 6769 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:30:24,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:24,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:30:24,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:26,711 INFO L124 PetriNetUnfolderBase]: 5002/8659 cut-off events. [2024-06-21 20:30:26,711 INFO L125 PetriNetUnfolderBase]: For 1617535/1617535 co-relation queries the response was YES. [2024-06-21 20:30:26,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58283 conditions, 8659 events. 5002/8659 cut-off events. For 1617535/1617535 co-relation queries the response was YES. Maximal size of possible extension queue 619. Compared 64661 event pairs, 1304 based on Foata normal form. 1/8654 useless extension candidates. Maximal degree in co-relation 58066. Up to 7576 conditions per place. [2024-06-21 20:30:26,850 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 422 selfloop transitions, 121 changer transitions 0/552 dead transitions. [2024-06-21 20:30:26,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 552 transitions, 8293 flow [2024-06-21 20:30:26,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:30:26,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:30:26,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-21 20:30:26,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-06-21 20:30:26,851 INFO L175 Difference]: Start difference. First operand has 436 places, 531 transitions, 6769 flow. Second operand 7 states and 184 transitions. [2024-06-21 20:30:26,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 552 transitions, 8293 flow [2024-06-21 20:30:39,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 552 transitions, 7969 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 20:30:39,947 INFO L231 Difference]: Finished difference. Result has 435 places, 534 transitions, 6755 flow [2024-06-21 20:30:39,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6453, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6755, PETRI_PLACES=435, PETRI_TRANSITIONS=534} [2024-06-21 20:30:39,948 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 392 predicate places. [2024-06-21 20:30:39,948 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 534 transitions, 6755 flow [2024-06-21 20:30:39,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:30:39,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:39,948 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] [2024-06-21 20:30:39,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-21 20:30:39,948 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:30:39,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:39,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1998822925, now seen corresponding path program 5 times [2024-06-21 20:30:39,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:39,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49470037] [2024-06-21 20:30:39,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:39,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:39,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:40,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:30:40,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:40,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49470037] [2024-06-21 20:30:40,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49470037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:40,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:40,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:30:40,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654586523] [2024-06-21 20:30:40,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:40,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:30:40,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:40,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:30:40,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:30:40,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:30:40,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 534 transitions, 6755 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:30:40,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:40,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:30:40,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:42,185 INFO L124 PetriNetUnfolderBase]: 5007/8668 cut-off events. [2024-06-21 20:30:42,185 INFO L125 PetriNetUnfolderBase]: For 1616870/1616870 co-relation queries the response was YES. [2024-06-21 20:30:42,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58329 conditions, 8668 events. 5007/8668 cut-off events. For 1616870/1616870 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 64726 event pairs, 1304 based on Foata normal form. 1/8663 useless extension candidates. Maximal degree in co-relation 58112. Up to 7582 conditions per place. [2024-06-21 20:30:42,322 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 420 selfloop transitions, 123 changer transitions 0/552 dead transitions. [2024-06-21 20:30:42,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 552 transitions, 8271 flow [2024-06-21 20:30:42,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:30:42,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:30:42,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 20:30:42,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156462585034014 [2024-06-21 20:30:42,323 INFO L175 Difference]: Start difference. First operand has 435 places, 534 transitions, 6755 flow. Second operand 7 states and 181 transitions. [2024-06-21 20:30:42,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 552 transitions, 8271 flow [2024-06-21 20:30:55,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 552 transitions, 8013 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 20:30:55,563 INFO L231 Difference]: Finished difference. Result has 436 places, 537 transitions, 6809 flow [2024-06-21 20:30:55,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6505, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6809, PETRI_PLACES=436, PETRI_TRANSITIONS=537} [2024-06-21 20:30:55,564 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 393 predicate places. [2024-06-21 20:30:55,564 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 537 transitions, 6809 flow [2024-06-21 20:30:55,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:30:55,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:55,564 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] [2024-06-21 20:30:55,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-21 20:30:55,565 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:30:55,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:55,565 INFO L85 PathProgramCache]: Analyzing trace with hash -2039442051, now seen corresponding path program 6 times [2024-06-21 20:30:55,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:55,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349466650] [2024-06-21 20:30:55,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:55,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:55,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:55,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:30:55,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:55,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349466650] [2024-06-21 20:30:55,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349466650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:55,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:55,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:30:55,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741699783] [2024-06-21 20:30:55,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:55,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:30:55,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:55,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:30:55,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:30:55,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 20:30:55,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 537 transitions, 6809 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:30:55,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:55,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 20:30:55,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:57,756 INFO L124 PetriNetUnfolderBase]: 5004/8664 cut-off events. [2024-06-21 20:30:57,757 INFO L125 PetriNetUnfolderBase]: For 1602329/1602329 co-relation queries the response was YES. [2024-06-21 20:30:58,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58109 conditions, 8664 events. 5004/8664 cut-off events. For 1602329/1602329 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 64709 event pairs, 1304 based on Foata normal form. 1/8659 useless extension candidates. Maximal degree in co-relation 57892. Up to 7579 conditions per place. [2024-06-21 20:30:58,084 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 412 selfloop transitions, 130 changer transitions 0/551 dead transitions. [2024-06-21 20:30:58,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 551 transitions, 7927 flow [2024-06-21 20:30:58,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:30:58,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:30:58,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-21 20:30:58,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-21 20:30:58,086 INFO L175 Difference]: Start difference. First operand has 436 places, 537 transitions, 6809 flow. Second operand 7 states and 179 transitions. [2024-06-21 20:30:58,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 551 transitions, 7927 flow Killed by 15