./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-06-19_11-23-25.files/protection/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 19:31:58,613 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 19:31:58,681 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 19:31:58,685 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 19:31:58,685 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 19:31:58,725 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 19:31:58,726 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 19:31:58,726 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 19:31:58,727 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 19:31:58,730 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 19:31:58,730 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 19:31:58,730 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 19:31:58,731 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 19:31:58,732 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 19:31:58,732 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 19:31:58,732 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 19:31:58,732 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 19:31:58,732 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 19:31:58,734 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 19:31:58,734 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 19:31:58,734 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 19:31:58,735 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 19:31:58,735 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 19:31:58,735 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 19:31:58,735 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 19:31:58,735 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 19:31:58,735 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 19:31:58,736 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 19:31:58,736 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 19:31:58,736 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 19:31:58,737 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 19:31:58,737 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 19:31:58,737 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:31:58,738 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 19:31:58,738 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 19:31:58,749 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 19:31:58,749 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 19:31:58,749 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 19:31:58,749 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 19:31:58,749 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 19:31:58,750 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 19:31:58,750 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 19:31:58,750 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 19:31:58,750 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 19:31:58,956 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 19:31:58,969 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 19:31:58,971 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 19:31:58,972 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 19:31:58,972 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 19:31:58,973 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-27 19:31:59,134 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 19:31:59,134 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 19:31:59,134 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 19:32:00,095 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 19:32:00,307 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 19:32:00,307 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 19:32:00,318 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/772313564/1f76e04b320040f9a36aa65d8799032d/FLAG95049856c [2024-06-27 19:32:00,341 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/772313564/1f76e04b320040f9a36aa65d8799032d [2024-06-27 19:32:00,341 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 19:32:00,342 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 19:32:00,343 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 19:32:00,343 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 19:32:00,352 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 19:32:00,352 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:31:59" (1/2) ... [2024-06-27 19:32:00,353 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12ed7c74 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:32:00, skipping insertion in model container [2024-06-27 19:32:00,353 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:31:59" (1/2) ... [2024-06-27 19:32:00,354 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@77236ead and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:32:00, skipping insertion in model container [2024-06-27 19:32:00,355 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:32:00" (2/2) ... [2024-06-27 19:32:00,355 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12ed7c74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:32:00, skipping insertion in model container [2024-06-27 19:32:00,355 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:32:00" (2/2) ... [2024-06-27 19:32:00,355 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 19:32:00,395 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 19:32:00,396 INFO L97 edCorrectnessWitness]: Location invariant before [L785-L785] (((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) [2024-06-27 19:32:00,396 INFO L97 edCorrectnessWitness]: Location invariant before [L786-L786] (((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) [2024-06-27 19:32:00,396 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] (((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) [2024-06-27 19:32:00,397 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 19:32:00,397 INFO L106 edCorrectnessWitness]: ghost_update [L781-L781] multithreaded = 1; [2024-06-27 19:32:00,458 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 19:32:00,693 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:32:00,699 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 19:32:00,762 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:32:00,788 INFO L206 MainTranslator]: Completed translation [2024-06-27 19:32:00,789 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:32:00 WrapperNode [2024-06-27 19:32:00,789 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 19:32:00,789 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 19:32:00,790 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 19:32:00,790 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 19:32:00,794 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:32:00" (1/1) ... [2024-06-27 19:32:00,803 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:32:00" (1/1) ... [2024-06-27 19:32:00,820 INFO L138 Inliner]: procedures = 175, calls = 44, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2024-06-27 19:32:00,820 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 19:32:00,821 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 19:32:00,821 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 19:32:00,821 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 19:32:00,830 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:32:00" (1/1) ... [2024-06-27 19:32:00,831 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:32:00" (1/1) ... [2024-06-27 19:32:00,843 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:32:00" (1/1) ... [2024-06-27 19:32:00,860 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 19:32:00,860 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:32:00" (1/1) ... [2024-06-27 19:32:00,860 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:32:00" (1/1) ... [2024-06-27 19:32:00,865 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:32:00" (1/1) ... [2024-06-27 19:32:00,866 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:32:00" (1/1) ... [2024-06-27 19:32:00,867 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:32:00" (1/1) ... [2024-06-27 19:32:00,868 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:32:00" (1/1) ... [2024-06-27 19:32:00,870 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 19:32:00,870 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 19:32:00,871 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 19:32:00,874 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 19:32:00,875 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:32:00" (1/1) ... [2024-06-27 19:32:00,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:32:00,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 19:32:00,901 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 19:32:00,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 19:32:00,928 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 19:32:00,929 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 19:32:00,929 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 19:32:00,929 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 19:32:00,929 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 19:32:00,929 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 19:32:00,929 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 19:32:00,929 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 19:32:00,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 19:32:00,930 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 19:32:00,930 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 19:32:00,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 19:32:00,931 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 19:32:01,016 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 19:32:01,017 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 19:32:01,146 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 19:32:01,146 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 19:32:01,242 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 19:32:01,242 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 19:32:01,242 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:32:01 BoogieIcfgContainer [2024-06-27 19:32:01,243 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 19:32:01,244 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 19:32:01,244 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 19:32:01,246 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 19:32:01,246 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:31:59" (1/4) ... [2024-06-27 19:32:01,247 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ce1ea6f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 07:32:01, skipping insertion in model container [2024-06-27 19:32:01,247 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 07:32:00" (2/4) ... [2024-06-27 19:32:01,247 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ce1ea6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 07:32:01, skipping insertion in model container [2024-06-27 19:32:01,247 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:32:00" (3/4) ... [2024-06-27 19:32:01,247 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ce1ea6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 07:32:01, skipping insertion in model container [2024-06-27 19:32:01,247 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:32:01" (4/4) ... [2024-06-27 19:32:01,248 INFO L112 eAbstractionObserver]: Analyzing ICFG safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-27 19:32:01,277 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 19:32:01,277 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 19:32:01,277 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 19:32:01,313 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 19:32:01,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-27 19:32:01,372 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-27 19:32:01,373 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:32:01,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 66 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 19:32:01,374 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-27 19:32:01,380 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-27 19:32:01,387 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 19:32:01,391 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;@3a6266c7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 19:32:01,392 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 19:32:01,408 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 19:32:01,408 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 19:32:01,408 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:32:01,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:01,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 19:32:01,410 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:01,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:01,413 INFO L85 PathProgramCache]: Analyzing trace with hash 219069644, now seen corresponding path program 1 times [2024-06-27 19:32:01,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:01,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555912566] [2024-06-27 19:32:01,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:01,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:01,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:01,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:01,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:01,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555912566] [2024-06-27 19:32:01,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555912566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:01,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:01,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 19:32:01,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385747490] [2024-06-27 19:32:01,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:01,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 19:32:01,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:01,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 19:32:01,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 19:32:01,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 41 [2024-06-27 19:32:01,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 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) [2024-06-27 19:32:01,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:01,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 41 [2024-06-27 19:32:01,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:02,023 INFO L124 PetriNetUnfolderBase]: 470/794 cut-off events. [2024-06-27 19:32:02,028 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-27 19:32:02,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1593 conditions, 794 events. 470/794 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3834 event pairs, 281 based on Foata normal form. 1/747 useless extension candidates. Maximal degree in co-relation 1581. Up to 736 conditions per place. [2024-06-27 19:32:02,042 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 27 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-27 19:32:02,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 161 flow [2024-06-27 19:32:02,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 19:32:02,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 19:32:02,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2024-06-27 19:32:02,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7154471544715447 [2024-06-27 19:32:02,056 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 88 transitions. [2024-06-27 19:32:02,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 161 flow [2024-06-27 19:32:02,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 156 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:02,062 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-27 19:32:02,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-27 19:32:02,067 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-27 19:32:02,068 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-27 19:32:02,068 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) [2024-06-27 19:32:02,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:02,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:02,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 19:32:02,069 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:02,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:02,071 INFO L85 PathProgramCache]: Analyzing trace with hash 73227933, now seen corresponding path program 1 times [2024-06-27 19:32:02,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:02,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790719411] [2024-06-27 19:32:02,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:02,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:02,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:02,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:02,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:02,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790719411] [2024-06-27 19:32:02,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790719411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:02,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:02,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 19:32:02,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895505050] [2024-06-27 19:32:02,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:02,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:32:02,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:02,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:32:02,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:32:02,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-27 19:32:02,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:02,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:02,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-27 19:32:02,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:02,356 INFO L124 PetriNetUnfolderBase]: 594/1000 cut-off events. [2024-06-27 19:32:02,356 INFO L125 PetriNetUnfolderBase]: For 220/254 co-relation queries the response was YES. [2024-06-27 19:32:02,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2293 conditions, 1000 events. 594/1000 cut-off events. For 220/254 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5018 event pairs, 319 based on Foata normal form. 3/970 useless extension candidates. Maximal degree in co-relation 2281. Up to 901 conditions per place. [2024-06-27 19:32:02,364 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 38 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-27 19:32:02,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 55 transitions, 246 flow [2024-06-27 19:32:02,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:32:02,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:32:02,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 113 transitions. [2024-06-27 19:32:02,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6890243902439024 [2024-06-27 19:32:02,369 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 113 transitions. [2024-06-27 19:32:02,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 55 transitions, 246 flow [2024-06-27 19:32:02,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 55 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 19:32:02,372 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 152 flow [2024-06-27 19:32:02,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-06-27 19:32:02,372 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-06-27 19:32:02,373 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 152 flow [2024-06-27 19:32:02,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:02,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:02,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:02,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 19:32:02,376 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:02,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:02,379 INFO L85 PathProgramCache]: Analyzing trace with hash 627187612, now seen corresponding path program 1 times [2024-06-27 19:32:02,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:02,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573615553] [2024-06-27 19:32:02,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:02,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:02,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:02,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:02,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:02,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573615553] [2024-06-27 19:32:02,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573615553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:02,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:02,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 19:32:02,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919876982] [2024-06-27 19:32:02,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:02,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:32:02,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:02,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:32:02,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:32:02,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-27 19:32:02,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 152 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) [2024-06-27 19:32:02,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:02,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-27 19:32:02,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:02,675 INFO L124 PetriNetUnfolderBase]: 793/1310 cut-off events. [2024-06-27 19:32:02,676 INFO L125 PetriNetUnfolderBase]: For 692/726 co-relation queries the response was YES. [2024-06-27 19:32:02,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3343 conditions, 1310 events. 793/1310 cut-off events. For 692/726 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 6666 event pairs, 430 based on Foata normal form. 2/1284 useless extension candidates. Maximal degree in co-relation 3328. Up to 1192 conditions per place. [2024-06-27 19:32:02,685 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 42 selfloop transitions, 9 changer transitions 0/62 dead transitions. [2024-06-27 19:32:02,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 62 transitions, 325 flow [2024-06-27 19:32:02,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:32:02,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:32:02,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 109 transitions. [2024-06-27 19:32:02,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6646341463414634 [2024-06-27 19:32:02,689 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 152 flow. Second operand 4 states and 109 transitions. [2024-06-27 19:32:02,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 62 transitions, 325 flow [2024-06-27 19:32:02,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 62 transitions, 323 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-27 19:32:02,693 INFO L231 Difference]: Finished difference. Result has 51 places, 49 transitions, 226 flow [2024-06-27 19:32:02,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=226, PETRI_PLACES=51, PETRI_TRANSITIONS=49} [2024-06-27 19:32:02,694 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2024-06-27 19:32:02,694 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 49 transitions, 226 flow [2024-06-27 19:32:02,694 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) [2024-06-27 19:32:02,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:02,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:02,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 19:32:02,695 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:02,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:02,696 INFO L85 PathProgramCache]: Analyzing trace with hash 816716713, now seen corresponding path program 1 times [2024-06-27 19:32:02,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:02,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037373731] [2024-06-27 19:32:02,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:02,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:02,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:02,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:02,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:02,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037373731] [2024-06-27 19:32:02,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037373731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:02,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:02,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:02,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833618257] [2024-06-27 19:32:02,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:02,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:02,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:02,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:02,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:02,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-27 19:32:02,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 49 transitions, 226 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:02,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:02,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-27 19:32:02,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:03,083 INFO L124 PetriNetUnfolderBase]: 879/1449 cut-off events. [2024-06-27 19:32:03,084 INFO L125 PetriNetUnfolderBase]: For 1441/1449 co-relation queries the response was YES. [2024-06-27 19:32:03,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4154 conditions, 1449 events. 879/1449 cut-off events. For 1441/1449 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7300 event pairs, 265 based on Foata normal form. 12/1454 useless extension candidates. Maximal degree in co-relation 4135. Up to 1266 conditions per place. [2024-06-27 19:32:03,094 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 54 selfloop transitions, 14 changer transitions 0/79 dead transitions. [2024-06-27 19:32:03,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 79 transitions, 444 flow [2024-06-27 19:32:03,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:03,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:03,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-27 19:32:03,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6422764227642277 [2024-06-27 19:32:03,096 INFO L175 Difference]: Start difference. First operand has 51 places, 49 transitions, 226 flow. Second operand 6 states and 158 transitions. [2024-06-27 19:32:03,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 79 transitions, 444 flow [2024-06-27 19:32:03,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 79 transitions, 442 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-27 19:32:03,102 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 286 flow [2024-06-27 19:32:03,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=286, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2024-06-27 19:32:03,104 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 15 predicate places. [2024-06-27 19:32:03,104 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 286 flow [2024-06-27 19:32:03,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:03,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:03,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:03,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 19:32:03,105 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:03,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:03,106 INFO L85 PathProgramCache]: Analyzing trace with hash -2032019753, now seen corresponding path program 1 times [2024-06-27 19:32:03,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:03,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840634885] [2024-06-27 19:32:03,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:03,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:03,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:03,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:03,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:03,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840634885] [2024-06-27 19:32:03,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840634885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:03,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:03,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 19:32:03,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795858660] [2024-06-27 19:32:03,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:03,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:32:03,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:03,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:32:03,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:32:03,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-27 19:32:03,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 286 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:03,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:03,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-27 19:32:03,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:03,362 INFO L124 PetriNetUnfolderBase]: 799/1347 cut-off events. [2024-06-27 19:32:03,363 INFO L125 PetriNetUnfolderBase]: For 2272/2279 co-relation queries the response was YES. [2024-06-27 19:32:03,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4265 conditions, 1347 events. 799/1347 cut-off events. For 2272/2279 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6920 event pairs, 329 based on Foata normal form. 4/1329 useless extension candidates. Maximal degree in co-relation 4242. Up to 1174 conditions per place. [2024-06-27 19:32:03,372 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 43 selfloop transitions, 9 changer transitions 0/65 dead transitions. [2024-06-27 19:32:03,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 65 transitions, 423 flow [2024-06-27 19:32:03,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:32:03,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:32:03,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 106 transitions. [2024-06-27 19:32:03,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2024-06-27 19:32:03,374 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 286 flow. Second operand 4 states and 106 transitions. [2024-06-27 19:32:03,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 65 transitions, 423 flow [2024-06-27 19:32:03,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 65 transitions, 394 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:03,381 INFO L231 Difference]: Finished difference. Result has 58 places, 54 transitions, 288 flow [2024-06-27 19:32:03,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=288, PETRI_PLACES=58, PETRI_TRANSITIONS=54} [2024-06-27 19:32:03,383 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-27 19:32:03,383 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 54 transitions, 288 flow [2024-06-27 19:32:03,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:03,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:03,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:03,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 19:32:03,385 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:03,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:03,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1425222715, now seen corresponding path program 1 times [2024-06-27 19:32:03,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:03,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227105350] [2024-06-27 19:32:03,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:03,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:03,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:03,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:03,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:03,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227105350] [2024-06-27 19:32:03,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227105350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:03,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:03,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:32:03,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189826921] [2024-06-27 19:32:03,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:03,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:32:03,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:03,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:32:03,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:32:03,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:03,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 288 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:03,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:03,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:03,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:03,634 INFO L124 PetriNetUnfolderBase]: 909/1482 cut-off events. [2024-06-27 19:32:03,634 INFO L125 PetriNetUnfolderBase]: For 2763/2769 co-relation queries the response was YES. [2024-06-27 19:32:03,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4783 conditions, 1482 events. 909/1482 cut-off events. For 2763/2769 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7340 event pairs, 335 based on Foata normal form. 3/1481 useless extension candidates. Maximal degree in co-relation 4759. Up to 1301 conditions per place. [2024-06-27 19:32:03,643 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 59 selfloop transitions, 16 changer transitions 0/83 dead transitions. [2024-06-27 19:32:03,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 83 transitions, 547 flow [2024-06-27 19:32:03,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:32:03,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:32:03,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-06-27 19:32:03,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6487804878048781 [2024-06-27 19:32:03,644 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 288 flow. Second operand 5 states and 133 transitions. [2024-06-27 19:32:03,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 83 transitions, 547 flow [2024-06-27 19:32:03,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 83 transitions, 537 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 19:32:03,650 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 374 flow [2024-06-27 19:32:03,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=374, PETRI_PLACES=63, PETRI_TRANSITIONS=62} [2024-06-27 19:32:03,653 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 21 predicate places. [2024-06-27 19:32:03,653 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 374 flow [2024-06-27 19:32:03,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:03,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:03,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:03,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 19:32:03,654 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:03,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:03,654 INFO L85 PathProgramCache]: Analyzing trace with hash 2119167325, now seen corresponding path program 2 times [2024-06-27 19:32:03,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:03,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218045012] [2024-06-27 19:32:03,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:03,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:03,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:03,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:03,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:03,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218045012] [2024-06-27 19:32:03,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218045012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:03,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:03,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:32:03,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700358600] [2024-06-27 19:32:03,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:03,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:32:03,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:03,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:32:03,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:32:03,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:03,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 374 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:03,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:03,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:03,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:03,931 INFO L124 PetriNetUnfolderBase]: 904/1463 cut-off events. [2024-06-27 19:32:03,932 INFO L125 PetriNetUnfolderBase]: For 4142/4142 co-relation queries the response was YES. [2024-06-27 19:32:03,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5266 conditions, 1463 events. 904/1463 cut-off events. For 4142/4142 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7208 event pairs, 354 based on Foata normal form. 2/1456 useless extension candidates. Maximal degree in co-relation 5239. Up to 1298 conditions per place. [2024-06-27 19:32:03,941 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 55 selfloop transitions, 19 changer transitions 0/82 dead transitions. [2024-06-27 19:32:03,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 82 transitions, 608 flow [2024-06-27 19:32:03,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:32:03,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:32:03,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-27 19:32:03,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292682926829268 [2024-06-27 19:32:03,942 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 374 flow. Second operand 5 states and 129 transitions. [2024-06-27 19:32:03,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 82 transitions, 608 flow [2024-06-27 19:32:03,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 82 transitions, 588 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-27 19:32:03,947 INFO L231 Difference]: Finished difference. Result has 67 places, 65 transitions, 422 flow [2024-06-27 19:32:03,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=422, PETRI_PLACES=67, PETRI_TRANSITIONS=65} [2024-06-27 19:32:03,948 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 25 predicate places. [2024-06-27 19:32:03,948 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 65 transitions, 422 flow [2024-06-27 19:32:03,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:03,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:03,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:03,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 19:32:03,949 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:03,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:03,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1904931882, now seen corresponding path program 1 times [2024-06-27 19:32:03,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:03,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172008082] [2024-06-27 19:32:03,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:03,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:03,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:04,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:04,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:04,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172008082] [2024-06-27 19:32:04,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172008082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:04,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:04,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:32:04,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346232092] [2024-06-27 19:32:04,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:04,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:32:04,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:04,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:32:04,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:32:04,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:04,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 65 transitions, 422 flow. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:04,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:04,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:04,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:04,199 INFO L124 PetriNetUnfolderBase]: 915/1499 cut-off events. [2024-06-27 19:32:04,199 INFO L125 PetriNetUnfolderBase]: For 5145/5151 co-relation queries the response was YES. [2024-06-27 19:32:04,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5640 conditions, 1499 events. 915/1499 cut-off events. For 5145/5151 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7483 event pairs, 342 based on Foata normal form. 3/1498 useless extension candidates. Maximal degree in co-relation 5611. Up to 1310 conditions per place. [2024-06-27 19:32:04,208 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 59 selfloop transitions, 21 changer transitions 0/88 dead transitions. [2024-06-27 19:32:04,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 88 transitions, 683 flow [2024-06-27 19:32:04,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:32:04,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:32:04,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-06-27 19:32:04,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6487804878048781 [2024-06-27 19:32:04,210 INFO L175 Difference]: Start difference. First operand has 67 places, 65 transitions, 422 flow. Second operand 5 states and 133 transitions. [2024-06-27 19:32:04,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 88 transitions, 683 flow [2024-06-27 19:32:04,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 88 transitions, 653 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 19:32:04,218 INFO L231 Difference]: Finished difference. Result has 70 places, 68 transitions, 466 flow [2024-06-27 19:32:04,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=466, PETRI_PLACES=70, PETRI_TRANSITIONS=68} [2024-06-27 19:32:04,220 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 28 predicate places. [2024-06-27 19:32:04,220 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 68 transitions, 466 flow [2024-06-27 19:32:04,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:04,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:04,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:04,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 19:32:04,221 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:04,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:04,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1269945300, now seen corresponding path program 2 times [2024-06-27 19:32:04,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:04,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794520866] [2024-06-27 19:32:04,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:04,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:04,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:04,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:04,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:04,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794520866] [2024-06-27 19:32:04,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794520866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:04,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:04,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:32:04,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819355645] [2024-06-27 19:32:04,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:04,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:32:04,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:04,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:32:04,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:32:04,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:04,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 466 flow. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:04,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:04,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:04,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:04,479 INFO L124 PetriNetUnfolderBase]: 910/1488 cut-off events. [2024-06-27 19:32:04,479 INFO L125 PetriNetUnfolderBase]: For 6269/6275 co-relation queries the response was YES. [2024-06-27 19:32:04,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5734 conditions, 1488 events. 910/1488 cut-off events. For 6269/6275 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7397 event pairs, 353 based on Foata normal form. 6/1487 useless extension candidates. Maximal degree in co-relation 5703. Up to 1305 conditions per place. [2024-06-27 19:32:04,492 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 55 selfloop transitions, 21 changer transitions 0/84 dead transitions. [2024-06-27 19:32:04,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 84 transitions, 664 flow [2024-06-27 19:32:04,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:32:04,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:32:04,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-27 19:32:04,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195121951219512 [2024-06-27 19:32:04,493 INFO L175 Difference]: Start difference. First operand has 70 places, 68 transitions, 466 flow. Second operand 5 states and 127 transitions. [2024-06-27 19:32:04,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 84 transitions, 664 flow [2024-06-27 19:32:04,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 84 transitions, 637 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-27 19:32:04,501 INFO L231 Difference]: Finished difference. Result has 73 places, 69 transitions, 497 flow [2024-06-27 19:32:04,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=497, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2024-06-27 19:32:04,502 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 31 predicate places. [2024-06-27 19:32:04,502 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 497 flow [2024-06-27 19:32:04,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:04,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:04,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:04,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 19:32:04,503 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:04,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:04,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1269955220, now seen corresponding path program 1 times [2024-06-27 19:32:04,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:04,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114676910] [2024-06-27 19:32:04,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:04,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:04,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:04,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:04,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:04,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114676910] [2024-06-27 19:32:04,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114676910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:04,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:04,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:32:04,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154009906] [2024-06-27 19:32:04,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:04,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:32:04,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:04,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:32:04,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:32:04,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-27 19:32:04,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 497 flow. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:04,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:04,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-27 19:32:04,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:04,760 INFO L124 PetriNetUnfolderBase]: 810/1377 cut-off events. [2024-06-27 19:32:04,760 INFO L125 PetriNetUnfolderBase]: For 7364/7370 co-relation queries the response was YES. [2024-06-27 19:32:04,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5446 conditions, 1377 events. 810/1377 cut-off events. For 7364/7370 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 7055 event pairs, 291 based on Foata normal form. 8/1370 useless extension candidates. Maximal degree in co-relation 5414. Up to 1169 conditions per place. [2024-06-27 19:32:04,773 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 63 selfloop transitions, 11 changer transitions 0/87 dead transitions. [2024-06-27 19:32:04,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 87 transitions, 697 flow [2024-06-27 19:32:04,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:32:04,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:32:04,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-27 19:32:04,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292682926829268 [2024-06-27 19:32:04,774 INFO L175 Difference]: Start difference. First operand has 73 places, 69 transitions, 497 flow. Second operand 5 states and 129 transitions. [2024-06-27 19:32:04,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 87 transitions, 697 flow [2024-06-27 19:32:04,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 87 transitions, 669 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-27 19:32:04,781 INFO L231 Difference]: Finished difference. Result has 76 places, 71 transitions, 514 flow [2024-06-27 19:32:04,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=514, PETRI_PLACES=76, PETRI_TRANSITIONS=71} [2024-06-27 19:32:04,782 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 34 predicate places. [2024-06-27 19:32:04,782 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 71 transitions, 514 flow [2024-06-27 19:32:04,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:04,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:04,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:04,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 19:32:04,783 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:04,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:04,784 INFO L85 PathProgramCache]: Analyzing trace with hash -2098789456, now seen corresponding path program 1 times [2024-06-27 19:32:04,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:04,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293764149] [2024-06-27 19:32:04,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:04,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:04,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:04,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:04,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:04,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293764149] [2024-06-27 19:32:04,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293764149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:04,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:04,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:04,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625779214] [2024-06-27 19:32:04,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:04,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:04,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:04,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:04,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:04,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:04,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 71 transitions, 514 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:04,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:04,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:04,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:05,125 INFO L124 PetriNetUnfolderBase]: 942/1551 cut-off events. [2024-06-27 19:32:05,125 INFO L125 PetriNetUnfolderBase]: For 8691/8691 co-relation queries the response was YES. [2024-06-27 19:32:05,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6274 conditions, 1551 events. 942/1551 cut-off events. For 8691/8691 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7842 event pairs, 268 based on Foata normal form. 3/1552 useless extension candidates. Maximal degree in co-relation 6240. Up to 1354 conditions per place. [2024-06-27 19:32:05,134 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 81 selfloop transitions, 22 changer transitions 0/111 dead transitions. [2024-06-27 19:32:05,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 111 transitions, 896 flow [2024-06-27 19:32:05,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:05,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:05,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-27 19:32:05,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306620209059234 [2024-06-27 19:32:05,136 INFO L175 Difference]: Start difference. First operand has 76 places, 71 transitions, 514 flow. Second operand 7 states and 181 transitions. [2024-06-27 19:32:05,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 111 transitions, 896 flow [2024-06-27 19:32:05,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 111 transitions, 869 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:05,146 INFO L231 Difference]: Finished difference. Result has 81 places, 79 transitions, 607 flow [2024-06-27 19:32:05,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=607, PETRI_PLACES=81, PETRI_TRANSITIONS=79} [2024-06-27 19:32:05,146 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-06-27 19:32:05,146 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 79 transitions, 607 flow [2024-06-27 19:32:05,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:05,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:05,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:05,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 19:32:05,147 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:05,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:05,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1107657944, now seen corresponding path program 2 times [2024-06-27 19:32:05,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:05,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541387362] [2024-06-27 19:32:05,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:05,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:05,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:05,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:05,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:05,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541387362] [2024-06-27 19:32:05,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541387362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:05,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:05,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:05,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659380882] [2024-06-27 19:32:05,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:05,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:05,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:05,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:05,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:05,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:05,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 79 transitions, 607 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:05,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:05,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:05,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:05,438 INFO L124 PetriNetUnfolderBase]: 953/1582 cut-off events. [2024-06-27 19:32:05,439 INFO L125 PetriNetUnfolderBase]: For 10898/10904 co-relation queries the response was YES. [2024-06-27 19:32:05,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6967 conditions, 1582 events. 953/1582 cut-off events. For 10898/10904 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 8020 event pairs, 303 based on Foata normal form. 3/1581 useless extension candidates. Maximal degree in co-relation 6931. Up to 1283 conditions per place. [2024-06-27 19:32:05,449 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 76 selfloop transitions, 32 changer transitions 0/116 dead transitions. [2024-06-27 19:32:05,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 116 transitions, 1043 flow [2024-06-27 19:32:05,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:05,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:05,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-27 19:32:05,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382113821138211 [2024-06-27 19:32:05,450 INFO L175 Difference]: Start difference. First operand has 81 places, 79 transitions, 607 flow. Second operand 6 states and 157 transitions. [2024-06-27 19:32:05,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 116 transitions, 1043 flow [2024-06-27 19:32:05,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 116 transitions, 969 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-27 19:32:05,463 INFO L231 Difference]: Finished difference. Result has 85 places, 91 transitions, 760 flow [2024-06-27 19:32:05,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=549, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=760, PETRI_PLACES=85, PETRI_TRANSITIONS=91} [2024-06-27 19:32:05,464 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 43 predicate places. [2024-06-27 19:32:05,464 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 91 transitions, 760 flow [2024-06-27 19:32:05,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:05,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:05,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:05,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 19:32:05,465 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:05,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:05,465 INFO L85 PathProgramCache]: Analyzing trace with hash 705318268, now seen corresponding path program 3 times [2024-06-27 19:32:05,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:05,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291373191] [2024-06-27 19:32:05,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:05,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:05,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:05,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:05,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:05,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291373191] [2024-06-27 19:32:05,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291373191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:05,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:05,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:05,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248085540] [2024-06-27 19:32:05,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:05,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:05,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:05,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:05,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:05,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:05,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 91 transitions, 760 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:05,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:05,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:05,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:05,748 INFO L124 PetriNetUnfolderBase]: 948/1553 cut-off events. [2024-06-27 19:32:05,748 INFO L125 PetriNetUnfolderBase]: For 13392/13392 co-relation queries the response was YES. [2024-06-27 19:32:05,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7371 conditions, 1553 events. 948/1553 cut-off events. For 13392/13392 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7817 event pairs, 329 based on Foata normal form. 2/1539 useless extension candidates. Maximal degree in co-relation 7332. Up to 1280 conditions per place. [2024-06-27 19:32:05,757 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 71 selfloop transitions, 36 changer transitions 0/115 dead transitions. [2024-06-27 19:32:05,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 115 transitions, 1110 flow [2024-06-27 19:32:05,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:05,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:05,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-27 19:32:05,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-27 19:32:05,759 INFO L175 Difference]: Start difference. First operand has 85 places, 91 transitions, 760 flow. Second operand 6 states and 153 transitions. [2024-06-27 19:32:05,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 115 transitions, 1110 flow [2024-06-27 19:32:05,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 115 transitions, 1074 flow, removed 14 selfloop flow, removed 1 redundant places. [2024-06-27 19:32:05,773 INFO L231 Difference]: Finished difference. Result has 90 places, 94 transitions, 842 flow [2024-06-27 19:32:05,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=726, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=842, PETRI_PLACES=90, PETRI_TRANSITIONS=94} [2024-06-27 19:32:05,774 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2024-06-27 19:32:05,774 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 94 transitions, 842 flow [2024-06-27 19:32:05,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:05,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:05,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:05,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 19:32:05,775 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:05,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:05,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1882266731, now seen corresponding path program 1 times [2024-06-27 19:32:05,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:05,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285875755] [2024-06-27 19:32:05,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:05,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:05,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:05,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:05,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:05,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285875755] [2024-06-27 19:32:05,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285875755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:05,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:05,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:05,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656635792] [2024-06-27 19:32:05,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:05,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:05,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:05,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:05,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:05,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-27 19:32:05,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 94 transitions, 842 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:05,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:05,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-27 19:32:05,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:06,152 INFO L124 PetriNetUnfolderBase]: 1082/1797 cut-off events. [2024-06-27 19:32:06,152 INFO L125 PetriNetUnfolderBase]: For 17197/17203 co-relation queries the response was YES. [2024-06-27 19:32:06,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8954 conditions, 1797 events. 1082/1797 cut-off events. For 17197/17203 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9317 event pairs, 305 based on Foata normal form. 5/1798 useless extension candidates. Maximal degree in co-relation 8912. Up to 1374 conditions per place. [2024-06-27 19:32:06,165 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 86 selfloop transitions, 68 changer transitions 0/161 dead transitions. [2024-06-27 19:32:06,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 161 transitions, 1780 flow [2024-06-27 19:32:06,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:06,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:06,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-27 19:32:06,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138211382113821 [2024-06-27 19:32:06,166 INFO L175 Difference]: Start difference. First operand has 90 places, 94 transitions, 842 flow. Second operand 6 states and 151 transitions. [2024-06-27 19:32:06,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 161 transitions, 1780 flow [2024-06-27 19:32:06,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 161 transitions, 1652 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:06,188 INFO L231 Difference]: Finished difference. Result has 95 places, 134 transitions, 1408 flow [2024-06-27 19:32:06,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=777, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1408, PETRI_PLACES=95, PETRI_TRANSITIONS=134} [2024-06-27 19:32:06,189 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 53 predicate places. [2024-06-27 19:32:06,189 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 134 transitions, 1408 flow [2024-06-27 19:32:06,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:06,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:06,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:06,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 19:32:06,190 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:06,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:06,191 INFO L85 PathProgramCache]: Analyzing trace with hash 160726859, now seen corresponding path program 2 times [2024-06-27 19:32:06,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:06,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653699911] [2024-06-27 19:32:06,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:06,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:06,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:06,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:06,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:06,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653699911] [2024-06-27 19:32:06,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653699911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:06,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:06,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:06,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38749295] [2024-06-27 19:32:06,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:06,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:06,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:06,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:06,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:06,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:06,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 134 transitions, 1408 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:06,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:06,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:06,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:06,603 INFO L124 PetriNetUnfolderBase]: 1071/1780 cut-off events. [2024-06-27 19:32:06,603 INFO L125 PetriNetUnfolderBase]: For 19042/19042 co-relation queries the response was YES. [2024-06-27 19:32:06,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9217 conditions, 1780 events. 1071/1780 cut-off events. For 19042/19042 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9188 event pairs, 297 based on Foata normal form. 4/1782 useless extension candidates. Maximal degree in co-relation 9172. Up to 1505 conditions per place. [2024-06-27 19:32:06,616 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 121 selfloop transitions, 39 changer transitions 0/168 dead transitions. [2024-06-27 19:32:06,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 168 transitions, 1874 flow [2024-06-27 19:32:06,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:06,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:06,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-27 19:32:06,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236933797909407 [2024-06-27 19:32:06,617 INFO L175 Difference]: Start difference. First operand has 95 places, 134 transitions, 1408 flow. Second operand 7 states and 179 transitions. [2024-06-27 19:32:06,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 168 transitions, 1874 flow [2024-06-27 19:32:06,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 168 transitions, 1789 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-27 19:32:06,640 INFO L231 Difference]: Finished difference. Result has 100 places, 134 transitions, 1422 flow [2024-06-27 19:32:06,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1325, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1422, PETRI_PLACES=100, PETRI_TRANSITIONS=134} [2024-06-27 19:32:06,642 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 58 predicate places. [2024-06-27 19:32:06,642 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 134 transitions, 1422 flow [2024-06-27 19:32:06,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:06,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:06,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:06,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 19:32:06,642 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:06,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:06,643 INFO L85 PathProgramCache]: Analyzing trace with hash 166440779, now seen corresponding path program 3 times [2024-06-27 19:32:06,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:06,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168792805] [2024-06-27 19:32:06,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:06,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:06,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:06,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:06,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:06,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168792805] [2024-06-27 19:32:06,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168792805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:06,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:06,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:06,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400632597] [2024-06-27 19:32:06,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:06,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:06,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:06,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:06,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:06,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:06,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 134 transitions, 1422 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:06,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:06,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:06,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:06,945 INFO L124 PetriNetUnfolderBase]: 1122/1870 cut-off events. [2024-06-27 19:32:06,946 INFO L125 PetriNetUnfolderBase]: For 22398/22406 co-relation queries the response was YES. [2024-06-27 19:32:06,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9829 conditions, 1870 events. 1122/1870 cut-off events. For 22398/22406 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9821 event pairs, 312 based on Foata normal form. 4/1870 useless extension candidates. Maximal degree in co-relation 9783. Up to 1418 conditions per place. [2024-06-27 19:32:06,963 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 85 selfloop transitions, 83 changer transitions 0/176 dead transitions. [2024-06-27 19:32:06,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 176 transitions, 2156 flow [2024-06-27 19:32:06,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:06,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:06,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-27 19:32:06,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2024-06-27 19:32:06,966 INFO L175 Difference]: Start difference. First operand has 100 places, 134 transitions, 1422 flow. Second operand 6 states and 159 transitions. [2024-06-27 19:32:06,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 176 transitions, 2156 flow [2024-06-27 19:32:06,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 176 transitions, 2078 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 19:32:06,996 INFO L231 Difference]: Finished difference. Result has 100 places, 149 transitions, 1719 flow [2024-06-27 19:32:06,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1344, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1719, PETRI_PLACES=100, PETRI_TRANSITIONS=149} [2024-06-27 19:32:06,997 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 58 predicate places. [2024-06-27 19:32:06,997 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 149 transitions, 1719 flow [2024-06-27 19:32:06,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:06,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:06,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:06,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 19:32:06,998 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:06,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:06,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1236250279, now seen corresponding path program 4 times [2024-06-27 19:32:06,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:06,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123751770] [2024-06-27 19:32:06,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:06,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:07,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:07,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:07,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:07,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123751770] [2024-06-27 19:32:07,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123751770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:07,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:07,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:07,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853234409] [2024-06-27 19:32:07,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:07,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:07,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:07,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:07,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:07,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:07,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 149 transitions, 1719 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:07,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:07,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:07,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:07,385 INFO L124 PetriNetUnfolderBase]: 1147/1909 cut-off events. [2024-06-27 19:32:07,385 INFO L125 PetriNetUnfolderBase]: For 25485/25499 co-relation queries the response was YES. [2024-06-27 19:32:07,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10408 conditions, 1909 events. 1147/1909 cut-off events. For 25485/25499 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 10020 event pairs, 315 based on Foata normal form. 4/1907 useless extension candidates. Maximal degree in co-relation 10361. Up to 1446 conditions per place. [2024-06-27 19:32:07,398 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 88 selfloop transitions, 90 changer transitions 0/186 dead transitions. [2024-06-27 19:32:07,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 186 transitions, 2361 flow [2024-06-27 19:32:07,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:07,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:07,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-27 19:32:07,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236933797909407 [2024-06-27 19:32:07,400 INFO L175 Difference]: Start difference. First operand has 100 places, 149 transitions, 1719 flow. Second operand 7 states and 179 transitions. [2024-06-27 19:32:07,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 186 transitions, 2361 flow [2024-06-27 19:32:07,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 186 transitions, 2226 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-06-27 19:32:07,436 INFO L231 Difference]: Finished difference. Result has 105 places, 158 transitions, 1911 flow [2024-06-27 19:32:07,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1593, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1911, PETRI_PLACES=105, PETRI_TRANSITIONS=158} [2024-06-27 19:32:07,437 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2024-06-27 19:32:07,437 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 158 transitions, 1911 flow [2024-06-27 19:32:07,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:07,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:07,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:07,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 19:32:07,438 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:07,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:07,438 INFO L85 PathProgramCache]: Analyzing trace with hash 166448715, now seen corresponding path program 1 times [2024-06-27 19:32:07,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:07,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207973364] [2024-06-27 19:32:07,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:07,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:07,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:07,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:07,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:07,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207973364] [2024-06-27 19:32:07,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207973364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:07,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:07,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:07,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726599904] [2024-06-27 19:32:07,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:07,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:07,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:07,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:07,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:07,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:07,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 158 transitions, 1911 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:07,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:07,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:07,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:07,763 INFO L124 PetriNetUnfolderBase]: 1164/1940 cut-off events. [2024-06-27 19:32:07,763 INFO L125 PetriNetUnfolderBase]: For 28985/28991 co-relation queries the response was YES. [2024-06-27 19:32:07,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10657 conditions, 1940 events. 1164/1940 cut-off events. For 28985/28991 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 10257 event pairs, 315 based on Foata normal form. 5/1941 useless extension candidates. Maximal degree in co-relation 10609. Up to 1616 conditions per place. [2024-06-27 19:32:07,777 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 137 selfloop transitions, 40 changer transitions 0/185 dead transitions. [2024-06-27 19:32:07,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 185 transitions, 2369 flow [2024-06-27 19:32:07,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:07,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:07,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-27 19:32:07,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-27 19:32:07,778 INFO L175 Difference]: Start difference. First operand has 105 places, 158 transitions, 1911 flow. Second operand 6 states and 153 transitions. [2024-06-27 19:32:07,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 185 transitions, 2369 flow [2024-06-27 19:32:07,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 185 transitions, 2147 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:07,807 INFO L231 Difference]: Finished difference. Result has 106 places, 160 transitions, 1802 flow [2024-06-27 19:32:07,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1689, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1802, PETRI_PLACES=106, PETRI_TRANSITIONS=160} [2024-06-27 19:32:07,808 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 64 predicate places. [2024-06-27 19:32:07,808 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 160 transitions, 1802 flow [2024-06-27 19:32:07,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:07,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:07,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:07,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 19:32:07,808 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:07,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:07,809 INFO L85 PathProgramCache]: Analyzing trace with hash 788836017, now seen corresponding path program 5 times [2024-06-27 19:32:07,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:07,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352020649] [2024-06-27 19:32:07,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:07,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:07,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:07,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:07,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:07,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352020649] [2024-06-27 19:32:07,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352020649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:07,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:07,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:07,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629580095] [2024-06-27 19:32:07,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:07,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:07,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:07,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:07,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:07,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:07,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 160 transitions, 1802 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:07,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:07,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:07,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:08,095 INFO L124 PetriNetUnfolderBase]: 1156/1922 cut-off events. [2024-06-27 19:32:08,095 INFO L125 PetriNetUnfolderBase]: For 29884/29890 co-relation queries the response was YES. [2024-06-27 19:32:08,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10539 conditions, 1922 events. 1156/1922 cut-off events. For 29884/29890 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 10119 event pairs, 331 based on Foata normal form. 7/1910 useless extension candidates. Maximal degree in co-relation 10490. Up to 1465 conditions per place. [2024-06-27 19:32:08,108 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 83 selfloop transitions, 93 changer transitions 0/184 dead transitions. [2024-06-27 19:32:08,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 184 transitions, 2328 flow [2024-06-27 19:32:08,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:08,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:08,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-27 19:32:08,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-27 19:32:08,110 INFO L175 Difference]: Start difference. First operand has 106 places, 160 transitions, 1802 flow. Second operand 6 states and 153 transitions. [2024-06-27 19:32:08,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 184 transitions, 2328 flow [2024-06-27 19:32:08,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 184 transitions, 2229 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 19:32:08,141 INFO L231 Difference]: Finished difference. Result has 108 places, 162 transitions, 1931 flow [2024-06-27 19:32:08,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1707, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1931, PETRI_PLACES=108, PETRI_TRANSITIONS=162} [2024-06-27 19:32:08,142 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 66 predicate places. [2024-06-27 19:32:08,142 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 162 transitions, 1931 flow [2024-06-27 19:32:08,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:08,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:08,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:08,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 19:32:08,143 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:08,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:08,143 INFO L85 PathProgramCache]: Analyzing trace with hash 2105995705, now seen corresponding path program 6 times [2024-06-27 19:32:08,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:08,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686539503] [2024-06-27 19:32:08,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:08,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:08,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:08,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:08,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:08,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686539503] [2024-06-27 19:32:08,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686539503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:08,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:08,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:08,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152965452] [2024-06-27 19:32:08,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:08,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:08,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:08,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:08,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:08,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:08,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 162 transitions, 1931 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:08,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:08,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:08,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:08,509 INFO L124 PetriNetUnfolderBase]: 1148/1898 cut-off events. [2024-06-27 19:32:08,509 INFO L125 PetriNetUnfolderBase]: For 31706/31706 co-relation queries the response was YES. [2024-06-27 19:32:08,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10661 conditions, 1898 events. 1148/1898 cut-off events. For 31706/31706 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9869 event pairs, 335 based on Foata normal form. 3/1870 useless extension candidates. Maximal degree in co-relation 10611. Up to 1457 conditions per place. [2024-06-27 19:32:08,522 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 82 selfloop transitions, 96 changer transitions 0/186 dead transitions. [2024-06-27 19:32:08,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 186 transitions, 2369 flow [2024-06-27 19:32:08,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:08,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:08,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 19:32:08,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-27 19:32:08,523 INFO L175 Difference]: Start difference. First operand has 108 places, 162 transitions, 1931 flow. Second operand 7 states and 173 transitions. [2024-06-27 19:32:08,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 186 transitions, 2369 flow [2024-06-27 19:32:08,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 186 transitions, 2191 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:08,554 INFO L231 Difference]: Finished difference. Result has 112 places, 162 transitions, 1960 flow [2024-06-27 19:32:08,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1753, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1960, PETRI_PLACES=112, PETRI_TRANSITIONS=162} [2024-06-27 19:32:08,554 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 70 predicate places. [2024-06-27 19:32:08,554 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 162 transitions, 1960 flow [2024-06-27 19:32:08,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:08,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:08,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:08,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 19:32:08,556 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:08,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:08,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1973643429, now seen corresponding path program 2 times [2024-06-27 19:32:08,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:08,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354939197] [2024-06-27 19:32:08,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:08,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:08,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:08,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:08,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:08,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354939197] [2024-06-27 19:32:08,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354939197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:08,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:08,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:08,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604230102] [2024-06-27 19:32:08,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:08,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:08,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:08,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:08,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:08,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:08,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 162 transitions, 1960 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:08,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:08,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:08,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:08,916 INFO L124 PetriNetUnfolderBase]: 1165/1947 cut-off events. [2024-06-27 19:32:08,916 INFO L125 PetriNetUnfolderBase]: For 35354/35360 co-relation queries the response was YES. [2024-06-27 19:32:08,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10930 conditions, 1947 events. 1165/1947 cut-off events. For 35354/35360 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 10320 event pairs, 329 based on Foata normal form. 8/1945 useless extension candidates. Maximal degree in co-relation 10878. Up to 1626 conditions per place. [2024-06-27 19:32:08,929 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 140 selfloop transitions, 39 changer transitions 0/187 dead transitions. [2024-06-27 19:32:08,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 187 transitions, 2422 flow [2024-06-27 19:32:08,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:08,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:08,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-27 19:32:08,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-27 19:32:08,931 INFO L175 Difference]: Start difference. First operand has 112 places, 162 transitions, 1960 flow. Second operand 6 states and 149 transitions. [2024-06-27 19:32:08,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 187 transitions, 2422 flow [2024-06-27 19:32:08,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 187 transitions, 2200 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:08,966 INFO L231 Difference]: Finished difference. Result has 113 places, 164 transitions, 1852 flow [2024-06-27 19:32:08,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1738, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1852, PETRI_PLACES=113, PETRI_TRANSITIONS=164} [2024-06-27 19:32:08,966 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 71 predicate places. [2024-06-27 19:32:08,966 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 164 transitions, 1852 flow [2024-06-27 19:32:08,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:08,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:08,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:08,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 19:32:08,967 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:08,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:08,968 INFO L85 PathProgramCache]: Analyzing trace with hash 275636605, now seen corresponding path program 3 times [2024-06-27 19:32:08,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:08,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040038631] [2024-06-27 19:32:08,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:08,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:08,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:09,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:09,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:09,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040038631] [2024-06-27 19:32:09,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040038631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:09,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:09,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:09,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602569876] [2024-06-27 19:32:09,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:09,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:09,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:09,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:09,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:09,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:09,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 164 transitions, 1852 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:09,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:09,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:09,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:09,293 INFO L124 PetriNetUnfolderBase]: 1157/1931 cut-off events. [2024-06-27 19:32:09,293 INFO L125 PetriNetUnfolderBase]: For 36558/36564 co-relation queries the response was YES. [2024-06-27 19:32:09,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10797 conditions, 1931 events. 1157/1931 cut-off events. For 36558/36564 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 10259 event pairs, 298 based on Foata normal form. 8/1929 useless extension candidates. Maximal degree in co-relation 10744. Up to 1547 conditions per place. [2024-06-27 19:32:09,306 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 138 selfloop transitions, 44 changer transitions 0/190 dead transitions. [2024-06-27 19:32:09,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 190 transitions, 2324 flow [2024-06-27 19:32:09,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:09,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:09,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-27 19:32:09,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 19:32:09,309 INFO L175 Difference]: Start difference. First operand has 113 places, 164 transitions, 1852 flow. Second operand 6 states and 150 transitions. [2024-06-27 19:32:09,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 190 transitions, 2324 flow [2024-06-27 19:32:09,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 190 transitions, 2230 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 19:32:09,341 INFO L231 Difference]: Finished difference. Result has 115 places, 166 transitions, 1885 flow [2024-06-27 19:32:09,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1758, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1885, PETRI_PLACES=115, PETRI_TRANSITIONS=166} [2024-06-27 19:32:09,342 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 73 predicate places. [2024-06-27 19:32:09,342 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 166 transitions, 1885 flow [2024-06-27 19:32:09,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:09,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:09,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:09,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 19:32:09,342 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:09,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:09,343 INFO L85 PathProgramCache]: Analyzing trace with hash 181145846, now seen corresponding path program 1 times [2024-06-27 19:32:09,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:09,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714102776] [2024-06-27 19:32:09,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:09,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:09,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:09,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:09,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:09,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714102776] [2024-06-27 19:32:09,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714102776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:09,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:09,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:32:09,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989898419] [2024-06-27 19:32:09,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:09,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:32:09,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:09,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:32:09,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:32:09,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-27 19:32:09,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 166 transitions, 1885 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) [2024-06-27 19:32:09,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:09,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-27 19:32:09,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:09,677 INFO L124 PetriNetUnfolderBase]: 1087/1857 cut-off events. [2024-06-27 19:32:09,681 INFO L125 PetriNetUnfolderBase]: For 38269/38280 co-relation queries the response was YES. [2024-06-27 19:32:09,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10686 conditions, 1857 events. 1087/1857 cut-off events. For 38269/38280 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 10044 event pairs, 293 based on Foata normal form. 2/1851 useless extension candidates. Maximal degree in co-relation 10632. Up to 1554 conditions per place. [2024-06-27 19:32:09,694 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 152 selfloop transitions, 22 changer transitions 0/189 dead transitions. [2024-06-27 19:32:09,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 189 transitions, 2435 flow [2024-06-27 19:32:09,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:32:09,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:32:09,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-27 19:32:09,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292682926829268 [2024-06-27 19:32:09,695 INFO L175 Difference]: Start difference. First operand has 115 places, 166 transitions, 1885 flow. Second operand 5 states and 129 transitions. [2024-06-27 19:32:09,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 189 transitions, 2435 flow [2024-06-27 19:32:09,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 189 transitions, 2326 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 19:32:09,734 INFO L231 Difference]: Finished difference. Result has 117 places, 175 transitions, 1924 flow [2024-06-27 19:32:09,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1776, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1924, PETRI_PLACES=117, PETRI_TRANSITIONS=175} [2024-06-27 19:32:09,735 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 75 predicate places. [2024-06-27 19:32:09,735 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 175 transitions, 1924 flow [2024-06-27 19:32:09,736 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) [2024-06-27 19:32:09,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:09,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:09,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 19:32:09,736 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:09,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:09,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1115101976, now seen corresponding path program 2 times [2024-06-27 19:32:09,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:09,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94654640] [2024-06-27 19:32:09,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:09,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:09,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:09,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:09,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:09,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94654640] [2024-06-27 19:32:09,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94654640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:09,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:09,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:32:09,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232819444] [2024-06-27 19:32:09,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:09,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:32:09,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:09,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:32:09,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:32:09,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-27 19:32:09,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 175 transitions, 1924 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) [2024-06-27 19:32:09,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:09,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-27 19:32:09,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:10,029 INFO L124 PetriNetUnfolderBase]: 1094/1874 cut-off events. [2024-06-27 19:32:10,029 INFO L125 PetriNetUnfolderBase]: For 39790/39800 co-relation queries the response was YES. [2024-06-27 19:32:10,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10952 conditions, 1874 events. 1094/1874 cut-off events. For 39790/39800 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 10219 event pairs, 289 based on Foata normal form. 2/1871 useless extension candidates. Maximal degree in co-relation 10896. Up to 1575 conditions per place. [2024-06-27 19:32:10,041 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 159 selfloop transitions, 20 changer transitions 0/194 dead transitions. [2024-06-27 19:32:10,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 194 transitions, 2407 flow [2024-06-27 19:32:10,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:32:10,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:32:10,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-27 19:32:10,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6390243902439025 [2024-06-27 19:32:10,043 INFO L175 Difference]: Start difference. First operand has 117 places, 175 transitions, 1924 flow. Second operand 5 states and 131 transitions. [2024-06-27 19:32:10,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 194 transitions, 2407 flow [2024-06-27 19:32:10,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 194 transitions, 2357 flow, removed 25 selfloop flow, removed 0 redundant places. [2024-06-27 19:32:10,086 INFO L231 Difference]: Finished difference. Result has 123 places, 178 transitions, 1970 flow [2024-06-27 19:32:10,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1880, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1970, PETRI_PLACES=123, PETRI_TRANSITIONS=178} [2024-06-27 19:32:10,087 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 81 predicate places. [2024-06-27 19:32:10,087 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 178 transitions, 1970 flow [2024-06-27 19:32:10,088 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) [2024-06-27 19:32:10,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:10,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:10,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 19:32:10,088 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:10,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:10,088 INFO L85 PathProgramCache]: Analyzing trace with hash -687633201, now seen corresponding path program 1 times [2024-06-27 19:32:10,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:10,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131567528] [2024-06-27 19:32:10,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:10,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:10,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:10,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:10,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:10,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131567528] [2024-06-27 19:32:10,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131567528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:10,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:10,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:10,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104747178] [2024-06-27 19:32:10,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:10,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:10,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:10,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:10,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:10,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:10,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 178 transitions, 1970 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:10,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:10,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:10,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:10,516 INFO L124 PetriNetUnfolderBase]: 1380/2277 cut-off events. [2024-06-27 19:32:10,516 INFO L125 PetriNetUnfolderBase]: For 53676/53676 co-relation queries the response was YES. [2024-06-27 19:32:10,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13609 conditions, 2277 events. 1380/2277 cut-off events. For 53676/53676 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12347 event pairs, 230 based on Foata normal form. 6/2281 useless extension candidates. Maximal degree in co-relation 13549. Up to 1644 conditions per place. [2024-06-27 19:32:10,532 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 177 selfloop transitions, 43 changer transitions 0/228 dead transitions. [2024-06-27 19:32:10,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 228 transitions, 2740 flow [2024-06-27 19:32:10,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:32:10,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:32:10,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-27 19:32:10,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6371951219512195 [2024-06-27 19:32:10,533 INFO L175 Difference]: Start difference. First operand has 123 places, 178 transitions, 1970 flow. Second operand 8 states and 209 transitions. [2024-06-27 19:32:10,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 228 transitions, 2740 flow [2024-06-27 19:32:10,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 228 transitions, 2708 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:10,585 INFO L231 Difference]: Finished difference. Result has 129 places, 185 transitions, 2137 flow [2024-06-27 19:32:10,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1938, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2137, PETRI_PLACES=129, PETRI_TRANSITIONS=185} [2024-06-27 19:32:10,585 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 87 predicate places. [2024-06-27 19:32:10,585 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 185 transitions, 2137 flow [2024-06-27 19:32:10,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:10,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:10,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:10,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 19:32:10,586 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:10,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:10,586 INFO L85 PathProgramCache]: Analyzing trace with hash 47216027, now seen corresponding path program 2 times [2024-06-27 19:32:10,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:10,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87955163] [2024-06-27 19:32:10,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:10,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:10,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:10,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:10,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:10,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87955163] [2024-06-27 19:32:10,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87955163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:10,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:10,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:10,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238044956] [2024-06-27 19:32:10,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:10,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:10,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:10,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:10,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:10,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:10,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 185 transitions, 2137 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:10,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:10,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:10,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:11,062 INFO L124 PetriNetUnfolderBase]: 1367/2266 cut-off events. [2024-06-27 19:32:11,062 INFO L125 PetriNetUnfolderBase]: For 56307/56307 co-relation queries the response was YES. [2024-06-27 19:32:11,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13971 conditions, 2266 events. 1367/2266 cut-off events. For 56307/56307 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 12339 event pairs, 311 based on Foata normal form. 6/2270 useless extension candidates. Maximal degree in co-relation 13909. Up to 1935 conditions per place. [2024-06-27 19:32:11,076 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 175 selfloop transitions, 42 changer transitions 0/225 dead transitions. [2024-06-27 19:32:11,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 225 transitions, 2747 flow [2024-06-27 19:32:11,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:32:11,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:32:11,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-27 19:32:11,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-27 19:32:11,078 INFO L175 Difference]: Start difference. First operand has 129 places, 185 transitions, 2137 flow. Second operand 8 states and 202 transitions. [2024-06-27 19:32:11,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 225 transitions, 2747 flow [2024-06-27 19:32:11,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 225 transitions, 2660 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 19:32:11,140 INFO L231 Difference]: Finished difference. Result has 133 places, 188 transitions, 2200 flow [2024-06-27 19:32:11,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2054, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2200, PETRI_PLACES=133, PETRI_TRANSITIONS=188} [2024-06-27 19:32:11,140 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 91 predicate places. [2024-06-27 19:32:11,141 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 188 transitions, 2200 flow [2024-06-27 19:32:11,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:11,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:11,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:11,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 19:32:11,141 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:11,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:11,142 INFO L85 PathProgramCache]: Analyzing trace with hash 330942841, now seen corresponding path program 3 times [2024-06-27 19:32:11,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:11,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654243151] [2024-06-27 19:32:11,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:11,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:11,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:11,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:11,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:11,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654243151] [2024-06-27 19:32:11,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654243151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:11,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:11,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:11,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052218251] [2024-06-27 19:32:11,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:11,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:11,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:11,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:11,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:11,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:11,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 188 transitions, 2200 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:11,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:11,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:11,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:11,535 INFO L124 PetriNetUnfolderBase]: 1384/2288 cut-off events. [2024-06-27 19:32:11,535 INFO L125 PetriNetUnfolderBase]: For 61058/61074 co-relation queries the response was YES. [2024-06-27 19:32:11,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14363 conditions, 2288 events. 1384/2288 cut-off events. For 61058/61074 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 12473 event pairs, 325 based on Foata normal form. 5/2287 useless extension candidates. Maximal degree in co-relation 14299. Up to 1808 conditions per place. [2024-06-27 19:32:11,551 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 115 selfloop transitions, 94 changer transitions 0/217 dead transitions. [2024-06-27 19:32:11,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 217 transitions, 2746 flow [2024-06-27 19:32:11,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:11,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:11,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-27 19:32:11,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-27 19:32:11,554 INFO L175 Difference]: Start difference. First operand has 133 places, 188 transitions, 2200 flow. Second operand 7 states and 177 transitions. [2024-06-27 19:32:11,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 217 transitions, 2746 flow [2024-06-27 19:32:11,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 217 transitions, 2634 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 19:32:11,713 INFO L231 Difference]: Finished difference. Result has 134 places, 190 transitions, 2330 flow [2024-06-27 19:32:11,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2088, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2330, PETRI_PLACES=134, PETRI_TRANSITIONS=190} [2024-06-27 19:32:11,713 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 92 predicate places. [2024-06-27 19:32:11,713 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 190 transitions, 2330 flow [2024-06-27 19:32:11,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:11,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:11,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:11,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 19:32:11,714 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:11,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:11,714 INFO L85 PathProgramCache]: Analyzing trace with hash -971136043, now seen corresponding path program 1 times [2024-06-27 19:32:11,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:11,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013343375] [2024-06-27 19:32:11,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:11,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:11,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:11,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:11,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:11,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013343375] [2024-06-27 19:32:11,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013343375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:11,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:11,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:11,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697223570] [2024-06-27 19:32:11,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:11,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:11,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:11,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:11,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:11,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-27 19:32:11,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 190 transitions, 2330 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) [2024-06-27 19:32:11,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:11,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-27 19:32:11,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:12,104 INFO L124 PetriNetUnfolderBase]: 1324/2247 cut-off events. [2024-06-27 19:32:12,104 INFO L125 PetriNetUnfolderBase]: For 63714/63716 co-relation queries the response was YES. [2024-06-27 19:32:12,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14305 conditions, 2247 events. 1324/2247 cut-off events. For 63714/63716 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 12529 event pairs, 308 based on Foata normal form. 2/2247 useless extension candidates. Maximal degree in co-relation 14240. Up to 1892 conditions per place. [2024-06-27 19:32:12,123 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 165 selfloop transitions, 30 changer transitions 0/218 dead transitions. [2024-06-27 19:32:12,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 218 transitions, 2911 flow [2024-06-27 19:32:12,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:12,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:12,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-27 19:32:12,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-27 19:32:12,125 INFO L175 Difference]: Start difference. First operand has 134 places, 190 transitions, 2330 flow. Second operand 6 states and 152 transitions. [2024-06-27 19:32:12,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 218 transitions, 2911 flow [2024-06-27 19:32:12,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 218 transitions, 2689 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:12,214 INFO L231 Difference]: Finished difference. Result has 136 places, 201 transitions, 2279 flow [2024-06-27 19:32:12,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2108, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2279, PETRI_PLACES=136, PETRI_TRANSITIONS=201} [2024-06-27 19:32:12,215 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 94 predicate places. [2024-06-27 19:32:12,215 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 201 transitions, 2279 flow [2024-06-27 19:32:12,215 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) [2024-06-27 19:32:12,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:12,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:12,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 19:32:12,216 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:12,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:12,216 INFO L85 PathProgramCache]: Analyzing trace with hash -882676665, now seen corresponding path program 4 times [2024-06-27 19:32:12,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:12,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55240081] [2024-06-27 19:32:12,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:12,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:12,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:12,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:12,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:12,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55240081] [2024-06-27 19:32:12,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55240081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:12,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:12,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:12,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706687733] [2024-06-27 19:32:12,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:12,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:12,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:12,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:12,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:12,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:12,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 201 transitions, 2279 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:12,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:12,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:12,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:12,609 INFO L124 PetriNetUnfolderBase]: 1396/2294 cut-off events. [2024-06-27 19:32:12,610 INFO L125 PetriNetUnfolderBase]: For 66482/66482 co-relation queries the response was YES. [2024-06-27 19:32:12,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14559 conditions, 2294 events. 1396/2294 cut-off events. For 66482/66482 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 12396 event pairs, 344 based on Foata normal form. 4/2261 useless extension candidates. Maximal degree in co-relation 14492. Up to 1824 conditions per place. [2024-06-27 19:32:12,625 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 122 selfloop transitions, 98 changer transitions 0/228 dead transitions. [2024-06-27 19:32:12,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 228 transitions, 2847 flow [2024-06-27 19:32:12,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:12,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:12,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 19:32:12,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-27 19:32:12,626 INFO L175 Difference]: Start difference. First operand has 136 places, 201 transitions, 2279 flow. Second operand 7 states and 173 transitions. [2024-06-27 19:32:12,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 228 transitions, 2847 flow [2024-06-27 19:32:12,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 228 transitions, 2817 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-27 19:32:12,728 INFO L231 Difference]: Finished difference. Result has 142 places, 203 transitions, 2503 flow [2024-06-27 19:32:12,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2249, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2503, PETRI_PLACES=142, PETRI_TRANSITIONS=203} [2024-06-27 19:32:12,728 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 100 predicate places. [2024-06-27 19:32:12,728 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 203 transitions, 2503 flow [2024-06-27 19:32:12,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:12,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:12,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:12,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 19:32:12,729 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:12,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:12,729 INFO L85 PathProgramCache]: Analyzing trace with hash 574773985, now seen corresponding path program 2 times [2024-06-27 19:32:12,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:12,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357629118] [2024-06-27 19:32:12,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:12,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:12,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:12,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:12,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:12,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357629118] [2024-06-27 19:32:12,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357629118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:12,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:12,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:12,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245227839] [2024-06-27 19:32:12,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:12,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:12,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:12,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:12,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:12,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-27 19:32:12,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 203 transitions, 2503 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) [2024-06-27 19:32:12,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:12,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-27 19:32:12,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:13,110 INFO L124 PetriNetUnfolderBase]: 1326/2253 cut-off events. [2024-06-27 19:32:13,110 INFO L125 PetriNetUnfolderBase]: For 70339/70341 co-relation queries the response was YES. [2024-06-27 19:32:13,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14698 conditions, 2253 events. 1326/2253 cut-off events. For 70339/70341 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12628 event pairs, 305 based on Foata normal form. 2/2253 useless extension candidates. Maximal degree in co-relation 14629. Up to 1904 conditions per place. [2024-06-27 19:32:13,127 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 172 selfloop transitions, 25 changer transitions 0/220 dead transitions. [2024-06-27 19:32:13,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 220 transitions, 2969 flow [2024-06-27 19:32:13,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:32:13,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:32:13,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 111 transitions. [2024-06-27 19:32:13,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.676829268292683 [2024-06-27 19:32:13,128 INFO L175 Difference]: Start difference. First operand has 142 places, 203 transitions, 2503 flow. Second operand 4 states and 111 transitions. [2024-06-27 19:32:13,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 220 transitions, 2969 flow [2024-06-27 19:32:13,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 220 transitions, 2735 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:13,265 INFO L231 Difference]: Finished difference. Result has 141 places, 206 transitions, 2373 flow [2024-06-27 19:32:13,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2269, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2373, PETRI_PLACES=141, PETRI_TRANSITIONS=206} [2024-06-27 19:32:13,265 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 99 predicate places. [2024-06-27 19:32:13,265 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 206 transitions, 2373 flow [2024-06-27 19:32:13,266 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) [2024-06-27 19:32:13,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:13,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:13,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 19:32:13,266 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:13,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:13,266 INFO L85 PathProgramCache]: Analyzing trace with hash 239489415, now seen corresponding path program 3 times [2024-06-27 19:32:13,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:13,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772533190] [2024-06-27 19:32:13,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:13,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:13,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:13,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:13,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:13,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772533190] [2024-06-27 19:32:13,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772533190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:13,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:13,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:13,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715783830] [2024-06-27 19:32:13,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:13,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:13,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:13,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:13,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:13,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-27 19:32:13,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 206 transitions, 2373 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) [2024-06-27 19:32:13,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:13,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-27 19:32:13,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:13,612 INFO L124 PetriNetUnfolderBase]: 1320/2245 cut-off events. [2024-06-27 19:32:13,612 INFO L125 PetriNetUnfolderBase]: For 71335/71337 co-relation queries the response was YES. [2024-06-27 19:32:13,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14389 conditions, 2245 events. 1320/2245 cut-off events. For 71335/71337 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 12563 event pairs, 305 based on Foata normal form. 2/2245 useless extension candidates. Maximal degree in co-relation 14319. Up to 1885 conditions per place. [2024-06-27 19:32:13,628 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 167 selfloop transitions, 31 changer transitions 0/221 dead transitions. [2024-06-27 19:32:13,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 221 transitions, 2817 flow [2024-06-27 19:32:13,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:32:13,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:32:13,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-27 19:32:13,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6390243902439025 [2024-06-27 19:32:13,630 INFO L175 Difference]: Start difference. First operand has 141 places, 206 transitions, 2373 flow. Second operand 5 states and 131 transitions. [2024-06-27 19:32:13,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 221 transitions, 2817 flow [2024-06-27 19:32:13,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 221 transitions, 2775 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-27 19:32:13,729 INFO L231 Difference]: Finished difference. Result has 144 places, 206 transitions, 2405 flow [2024-06-27 19:32:13,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2331, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2405, PETRI_PLACES=144, PETRI_TRANSITIONS=206} [2024-06-27 19:32:13,730 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 102 predicate places. [2024-06-27 19:32:13,730 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 206 transitions, 2405 flow [2024-06-27 19:32:13,730 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) [2024-06-27 19:32:13,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:13,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:13,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 19:32:13,730 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:13,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:13,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1251514325, now seen corresponding path program 1 times [2024-06-27 19:32:13,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:13,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580112549] [2024-06-27 19:32:13,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:13,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:13,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:13,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:13,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:13,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580112549] [2024-06-27 19:32:13,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580112549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:13,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:13,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:32:13,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860041717] [2024-06-27 19:32:13,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:13,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:32:13,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:13,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:32:13,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:32:13,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-27 19:32:13,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 206 transitions, 2405 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) [2024-06-27 19:32:13,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:13,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-27 19:32:13,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:14,051 INFO L124 PetriNetUnfolderBase]: 1294/2221 cut-off events. [2024-06-27 19:32:14,052 INFO L125 PetriNetUnfolderBase]: For 75921/75953 co-relation queries the response was YES. [2024-06-27 19:32:14,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14422 conditions, 2221 events. 1294/2221 cut-off events. For 75921/75953 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 12623 event pairs, 303 based on Foata normal form. 16/2227 useless extension candidates. Maximal degree in co-relation 14351. Up to 1870 conditions per place. [2024-06-27 19:32:14,068 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 176 selfloop transitions, 25 changer transitions 0/222 dead transitions. [2024-06-27 19:32:14,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 222 transitions, 2938 flow [2024-06-27 19:32:14,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:32:14,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:32:14,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-27 19:32:14,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.624390243902439 [2024-06-27 19:32:14,070 INFO L175 Difference]: Start difference. First operand has 144 places, 206 transitions, 2405 flow. Second operand 5 states and 128 transitions. [2024-06-27 19:32:14,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 222 transitions, 2938 flow [2024-06-27 19:32:14,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 222 transitions, 2863 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 19:32:14,165 INFO L231 Difference]: Finished difference. Result has 145 places, 209 transitions, 2419 flow [2024-06-27 19:32:14,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2332, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2419, PETRI_PLACES=145, PETRI_TRANSITIONS=209} [2024-06-27 19:32:14,166 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 103 predicate places. [2024-06-27 19:32:14,166 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 209 transitions, 2419 flow [2024-06-27 19:32:14,166 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) [2024-06-27 19:32:14,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:14,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:14,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 19:32:14,167 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:14,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:14,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1364866695, now seen corresponding path program 2 times [2024-06-27 19:32:14,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:14,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091494550] [2024-06-27 19:32:14,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:14,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:14,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:14,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:14,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:14,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091494550] [2024-06-27 19:32:14,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091494550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:14,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:14,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:14,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423573588] [2024-06-27 19:32:14,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:14,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:14,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:14,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:14,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:14,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-27 19:32:14,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 209 transitions, 2419 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) [2024-06-27 19:32:14,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:14,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-27 19:32:14,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:14,523 INFO L124 PetriNetUnfolderBase]: 1300/2220 cut-off events. [2024-06-27 19:32:14,523 INFO L125 PetriNetUnfolderBase]: For 75418/75433 co-relation queries the response was YES. [2024-06-27 19:32:14,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14349 conditions, 2220 events. 1300/2220 cut-off events. For 75418/75433 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 12528 event pairs, 302 based on Foata normal form. 7/2218 useless extension candidates. Maximal degree in co-relation 14278. Up to 1875 conditions per place. [2024-06-27 19:32:14,540 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 174 selfloop transitions, 28 changer transitions 0/223 dead transitions. [2024-06-27 19:32:14,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 223 transitions, 2925 flow [2024-06-27 19:32:14,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:14,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:14,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-27 19:32:14,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-27 19:32:14,541 INFO L175 Difference]: Start difference. First operand has 145 places, 209 transitions, 2419 flow. Second operand 6 states and 148 transitions. [2024-06-27 19:32:14,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 223 transitions, 2925 flow [2024-06-27 19:32:14,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 223 transitions, 2853 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:14,635 INFO L231 Difference]: Finished difference. Result has 148 places, 209 transitions, 2409 flow [2024-06-27 19:32:14,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2347, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2409, PETRI_PLACES=148, PETRI_TRANSITIONS=209} [2024-06-27 19:32:14,636 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 106 predicate places. [2024-06-27 19:32:14,636 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 209 transitions, 2409 flow [2024-06-27 19:32:14,636 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) [2024-06-27 19:32:14,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:14,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:14,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 19:32:14,637 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)] === [2024-06-27 19:32:14,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:14,637 INFO L85 PathProgramCache]: Analyzing trace with hash 208423943, now seen corresponding path program 3 times [2024-06-27 19:32:14,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:14,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948467078] [2024-06-27 19:32:14,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:14,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:14,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:14,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:14,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:14,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948467078] [2024-06-27 19:32:14,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948467078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:14,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:14,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:32:14,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604629015] [2024-06-27 19:32:14,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:14,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:32:14,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:14,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:32:14,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:32:14,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-27 19:32:14,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 209 transitions, 2409 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) [2024-06-27 19:32:14,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:14,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-27 19:32:14,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:14,983 INFO L124 PetriNetUnfolderBase]: 1294/2218 cut-off events. [2024-06-27 19:32:14,983 INFO L125 PetriNetUnfolderBase]: For 77560/77576 co-relation queries the response was YES. [2024-06-27 19:32:14,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14362 conditions, 2218 events. 1294/2218 cut-off events. For 77560/77576 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 12526 event pairs, 295 based on Foata normal form. 3/2216 useless extension candidates. Maximal degree in co-relation 14291. Up to 1879 conditions per place. [2024-06-27 19:32:14,999 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 183 selfloop transitions, 20 changer transitions 0/224 dead transitions. [2024-06-27 19:32:14,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 224 transitions, 2861 flow [2024-06-27 19:32:14,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:32:14,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:32:15,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-27 19:32:15,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-27 19:32:15,000 INFO L175 Difference]: Start difference. First operand has 148 places, 209 transitions, 2409 flow. Second operand 5 states and 130 transitions. [2024-06-27 19:32:15,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 224 transitions, 2861 flow [2024-06-27 19:32:15,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 224 transitions, 2767 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 19:32:15,106 INFO L231 Difference]: Finished difference. Result has 147 places, 209 transitions, 2365 flow [2024-06-27 19:32:15,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2315, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2365, PETRI_PLACES=147, PETRI_TRANSITIONS=209} [2024-06-27 19:32:15,107 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 105 predicate places. [2024-06-27 19:32:15,107 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 209 transitions, 2365 flow [2024-06-27 19:32:15,107 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) [2024-06-27 19:32:15,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:15,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:15,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 19:32:15,108 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)] === [2024-06-27 19:32:15,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:15,108 INFO L85 PathProgramCache]: Analyzing trace with hash 208670207, now seen corresponding path program 1 times [2024-06-27 19:32:15,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:15,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040651640] [2024-06-27 19:32:15,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:15,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:15,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:15,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:15,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:15,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040651640] [2024-06-27 19:32:15,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040651640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:15,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:15,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:15,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663695705] [2024-06-27 19:32:15,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:15,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:15,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:15,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:15,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:15,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-27 19:32:15,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 209 transitions, 2365 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) [2024-06-27 19:32:15,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:15,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-27 19:32:15,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:15,463 INFO L124 PetriNetUnfolderBase]: 1305/2231 cut-off events. [2024-06-27 19:32:15,463 INFO L125 PetriNetUnfolderBase]: For 79710/79720 co-relation queries the response was YES. [2024-06-27 19:32:15,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14376 conditions, 2231 events. 1305/2231 cut-off events. For 79710/79720 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 12514 event pairs, 318 based on Foata normal form. 2/2228 useless extension candidates. Maximal degree in co-relation 14305. Up to 1925 conditions per place. [2024-06-27 19:32:15,479 INFO L140 encePairwiseOnDemand]: 36/41 looper letters, 187 selfloop transitions, 10 changer transitions 0/220 dead transitions. [2024-06-27 19:32:15,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 220 transitions, 2805 flow [2024-06-27 19:32:15,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:32:15,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:32:15,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-06-27 19:32:15,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6280487804878049 [2024-06-27 19:32:15,481 INFO L175 Difference]: Start difference. First operand has 147 places, 209 transitions, 2365 flow. Second operand 4 states and 103 transitions. [2024-06-27 19:32:15,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 220 transitions, 2805 flow [2024-06-27 19:32:15,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 220 transitions, 2765 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 19:32:15,603 INFO L231 Difference]: Finished difference. Result has 147 places, 211 transitions, 2374 flow [2024-06-27 19:32:15,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2325, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2374, PETRI_PLACES=147, PETRI_TRANSITIONS=211} [2024-06-27 19:32:15,604 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 105 predicate places. [2024-06-27 19:32:15,604 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 211 transitions, 2374 flow [2024-06-27 19:32:15,604 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) [2024-06-27 19:32:15,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:15,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:15,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 19:32:15,605 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:15,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:15,605 INFO L85 PathProgramCache]: Analyzing trace with hash 628897646, now seen corresponding path program 1 times [2024-06-27 19:32:15,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:15,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752183577] [2024-06-27 19:32:15,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:15,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:15,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:15,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:15,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:15,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752183577] [2024-06-27 19:32:15,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752183577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:15,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:15,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:15,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226005693] [2024-06-27 19:32:15,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:15,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:15,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:15,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:15,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:15,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:15,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 211 transitions, 2374 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:15,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:15,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:15,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:16,065 INFO L124 PetriNetUnfolderBase]: 1454/2415 cut-off events. [2024-06-27 19:32:16,065 INFO L125 PetriNetUnfolderBase]: For 93306/93306 co-relation queries the response was YES. [2024-06-27 19:32:16,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15528 conditions, 2415 events. 1454/2415 cut-off events. For 93306/93306 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 13295 event pairs, 219 based on Foata normal form. 18/2431 useless extension candidates. Maximal degree in co-relation 15456. Up to 1696 conditions per place. [2024-06-27 19:32:16,080 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 197 selfloop transitions, 52 changer transitions 0/257 dead transitions. [2024-06-27 19:32:16,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 257 transitions, 3184 flow [2024-06-27 19:32:16,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:32:16,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:32:16,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-27 19:32:16,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6402439024390244 [2024-06-27 19:32:16,082 INFO L175 Difference]: Start difference. First operand has 147 places, 211 transitions, 2374 flow. Second operand 8 states and 210 transitions. [2024-06-27 19:32:16,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 257 transitions, 3184 flow [2024-06-27 19:32:16,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 257 transitions, 3151 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-27 19:32:16,189 INFO L231 Difference]: Finished difference. Result has 153 places, 213 transitions, 2485 flow [2024-06-27 19:32:16,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2341, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2485, PETRI_PLACES=153, PETRI_TRANSITIONS=213} [2024-06-27 19:32:16,189 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 111 predicate places. [2024-06-27 19:32:16,190 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 213 transitions, 2485 flow [2024-06-27 19:32:16,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:16,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:16,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:16,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 19:32:16,190 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:16,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:16,191 INFO L85 PathProgramCache]: Analyzing trace with hash 630775316, now seen corresponding path program 2 times [2024-06-27 19:32:16,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:16,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902442549] [2024-06-27 19:32:16,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:16,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:16,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:16,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:16,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:16,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902442549] [2024-06-27 19:32:16,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902442549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:16,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:16,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:16,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894753360] [2024-06-27 19:32:16,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:16,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:16,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:16,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:16,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:16,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:16,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 213 transitions, 2485 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:16,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:16,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:16,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:16,633 INFO L124 PetriNetUnfolderBase]: 1408/2353 cut-off events. [2024-06-27 19:32:16,633 INFO L125 PetriNetUnfolderBase]: For 87896/87896 co-relation queries the response was YES. [2024-06-27 19:32:16,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14797 conditions, 2353 events. 1408/2353 cut-off events. For 87896/87896 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 12923 event pairs, 283 based on Foata normal form. 24/2375 useless extension candidates. Maximal degree in co-relation 14724. Up to 1891 conditions per place. [2024-06-27 19:32:16,651 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 200 selfloop transitions, 46 changer transitions 0/254 dead transitions. [2024-06-27 19:32:16,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 254 transitions, 3148 flow [2024-06-27 19:32:16,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:32:16,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:32:16,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-27 19:32:16,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-27 19:32:16,653 INFO L175 Difference]: Start difference. First operand has 153 places, 213 transitions, 2485 flow. Second operand 8 states and 204 transitions. [2024-06-27 19:32:16,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 254 transitions, 3148 flow [2024-06-27 19:32:16,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 254 transitions, 3031 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:16,796 INFO L231 Difference]: Finished difference. Result has 156 places, 214 transitions, 2499 flow [2024-06-27 19:32:16,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2379, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2499, PETRI_PLACES=156, PETRI_TRANSITIONS=214} [2024-06-27 19:32:16,797 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 114 predicate places. [2024-06-27 19:32:16,797 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 214 transitions, 2499 flow [2024-06-27 19:32:16,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:16,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:16,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:16,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 19:32:16,798 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:16,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:16,798 INFO L85 PathProgramCache]: Analyzing trace with hash 2094764292, now seen corresponding path program 3 times [2024-06-27 19:32:16,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:16,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155853355] [2024-06-27 19:32:16,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:16,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:16,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:16,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:16,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:16,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155853355] [2024-06-27 19:32:16,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155853355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:16,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:16,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:16,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33395489] [2024-06-27 19:32:16,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:16,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:16,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:16,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:16,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:16,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:16,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 214 transitions, 2499 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:16,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:16,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:16,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:17,343 INFO L124 PetriNetUnfolderBase]: 1466/2457 cut-off events. [2024-06-27 19:32:17,344 INFO L125 PetriNetUnfolderBase]: For 89006/89020 co-relation queries the response was YES. [2024-06-27 19:32:17,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15238 conditions, 2457 events. 1466/2457 cut-off events. For 89006/89020 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 13752 event pairs, 314 based on Foata normal form. 17/2468 useless extension candidates. Maximal degree in co-relation 15164. Up to 1869 conditions per place. [2024-06-27 19:32:17,366 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 148 selfloop transitions, 93 changer transitions 0/249 dead transitions. [2024-06-27 19:32:17,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 249 transitions, 3129 flow [2024-06-27 19:32:17,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:32:17,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:32:17,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-27 19:32:17,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6128048780487805 [2024-06-27 19:32:17,368 INFO L175 Difference]: Start difference. First operand has 156 places, 214 transitions, 2499 flow. Second operand 8 states and 201 transitions. [2024-06-27 19:32:17,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 249 transitions, 3129 flow [2024-06-27 19:32:17,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 249 transitions, 3041 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 19:32:17,512 INFO L231 Difference]: Finished difference. Result has 158 places, 215 transitions, 2636 flow [2024-06-27 19:32:17,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2411, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2636, PETRI_PLACES=158, PETRI_TRANSITIONS=215} [2024-06-27 19:32:17,512 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 116 predicate places. [2024-06-27 19:32:17,512 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 215 transitions, 2636 flow [2024-06-27 19:32:17,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:17,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:17,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:17,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 19:32:17,513 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:17,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:17,514 INFO L85 PathProgramCache]: Analyzing trace with hash -3477620, now seen corresponding path program 4 times [2024-06-27 19:32:17,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:17,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815092861] [2024-06-27 19:32:17,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:17,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:17,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:17,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:17,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:17,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815092861] [2024-06-27 19:32:17,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815092861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:17,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:17,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:17,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243574599] [2024-06-27 19:32:17,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:17,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:17,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:17,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:17,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:17,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:17,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 215 transitions, 2636 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:17,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:17,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:17,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:18,025 INFO L124 PetriNetUnfolderBase]: 1507/2528 cut-off events. [2024-06-27 19:32:18,025 INFO L125 PetriNetUnfolderBase]: For 93069/93083 co-relation queries the response was YES. [2024-06-27 19:32:18,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15870 conditions, 2528 events. 1507/2528 cut-off events. For 93069/93083 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 14298 event pairs, 309 based on Foata normal form. 13/2535 useless extension candidates. Maximal degree in co-relation 15795. Up to 1850 conditions per place. [2024-06-27 19:32:18,044 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 153 selfloop transitions, 96 changer transitions 0/257 dead transitions. [2024-06-27 19:32:18,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 257 transitions, 3310 flow [2024-06-27 19:32:18,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:32:18,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:32:18,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-06-27 19:32:18,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 19:32:18,046 INFO L175 Difference]: Start difference. First operand has 158 places, 215 transitions, 2636 flow. Second operand 9 states and 225 transitions. [2024-06-27 19:32:18,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 257 transitions, 3310 flow [2024-06-27 19:32:18,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 257 transitions, 3111 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 19:32:18,232 INFO L231 Difference]: Finished difference. Result has 161 places, 216 transitions, 2665 flow [2024-06-27 19:32:18,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2437, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2665, PETRI_PLACES=161, PETRI_TRANSITIONS=216} [2024-06-27 19:32:18,232 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 119 predicate places. [2024-06-27 19:32:18,232 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 216 transitions, 2665 flow [2024-06-27 19:32:18,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:18,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:18,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:18,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 19:32:18,233 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:18,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:18,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1035817898, now seen corresponding path program 5 times [2024-06-27 19:32:18,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:18,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018172186] [2024-06-27 19:32:18,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:18,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:18,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:18,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:18,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:18,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018172186] [2024-06-27 19:32:18,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018172186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:18,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:18,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:18,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665321165] [2024-06-27 19:32:18,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:18,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:18,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:18,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:18,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:18,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:18,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 216 transitions, 2665 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:18,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:18,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:18,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:18,697 INFO L124 PetriNetUnfolderBase]: 1565/2642 cut-off events. [2024-06-27 19:32:18,697 INFO L125 PetriNetUnfolderBase]: For 100605/100613 co-relation queries the response was YES. [2024-06-27 19:32:18,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16437 conditions, 2642 events. 1565/2642 cut-off events. For 100605/100613 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 15224 event pairs, 336 based on Foata normal form. 17/2655 useless extension candidates. Maximal degree in co-relation 16361. Up to 2034 conditions per place. [2024-06-27 19:32:18,719 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 145 selfloop transitions, 95 changer transitions 0/248 dead transitions. [2024-06-27 19:32:18,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 248 transitions, 3287 flow [2024-06-27 19:32:18,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:18,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:18,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-27 19:32:18,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236933797909407 [2024-06-27 19:32:18,720 INFO L175 Difference]: Start difference. First operand has 161 places, 216 transitions, 2665 flow. Second operand 7 states and 179 transitions. [2024-06-27 19:32:18,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 248 transitions, 3287 flow [2024-06-27 19:32:18,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 248 transitions, 3073 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 19:32:18,920 INFO L231 Difference]: Finished difference. Result has 161 places, 217 transitions, 2684 flow [2024-06-27 19:32:18,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2451, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2684, PETRI_PLACES=161, PETRI_TRANSITIONS=217} [2024-06-27 19:32:18,920 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 119 predicate places. [2024-06-27 19:32:18,921 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 217 transitions, 2684 flow [2024-06-27 19:32:18,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:18,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:18,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:18,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 19:32:18,921 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)] === [2024-06-27 19:32:18,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:18,922 INFO L85 PathProgramCache]: Analyzing trace with hash 572752768, now seen corresponding path program 1 times [2024-06-27 19:32:18,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:18,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841849927] [2024-06-27 19:32:18,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:18,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:18,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:19,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:19,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:19,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841849927] [2024-06-27 19:32:19,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841849927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:19,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:19,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:19,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294455059] [2024-06-27 19:32:19,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:19,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:19,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:19,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:19,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:19,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:19,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 217 transitions, 2684 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:19,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:19,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:19,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:19,440 INFO L124 PetriNetUnfolderBase]: 1692/2865 cut-off events. [2024-06-27 19:32:19,440 INFO L125 PetriNetUnfolderBase]: For 115521/115529 co-relation queries the response was YES. [2024-06-27 19:32:19,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18149 conditions, 2865 events. 1692/2865 cut-off events. For 115521/115529 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 16967 event pairs, 358 based on Foata normal form. 13/2874 useless extension candidates. Maximal degree in co-relation 18072. Up to 1800 conditions per place. [2024-06-27 19:32:19,463 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 147 selfloop transitions, 99 changer transitions 0/254 dead transitions. [2024-06-27 19:32:19,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 254 transitions, 3504 flow [2024-06-27 19:32:19,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:19,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:19,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-27 19:32:19,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376306620209059 [2024-06-27 19:32:19,465 INFO L175 Difference]: Start difference. First operand has 161 places, 217 transitions, 2684 flow. Second operand 7 states and 183 transitions. [2024-06-27 19:32:19,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 254 transitions, 3504 flow [2024-06-27 19:32:19,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 254 transitions, 3297 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:19,633 INFO L231 Difference]: Finished difference. Result has 163 places, 219 transitions, 2747 flow [2024-06-27 19:32:19,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2477, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2747, PETRI_PLACES=163, PETRI_TRANSITIONS=219} [2024-06-27 19:32:19,634 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 121 predicate places. [2024-06-27 19:32:19,634 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 219 transitions, 2747 flow [2024-06-27 19:32:19,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:19,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:19,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:19,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 19:32:19,635 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:19,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:19,635 INFO L85 PathProgramCache]: Analyzing trace with hash 784133375, now seen corresponding path program 1 times [2024-06-27 19:32:19,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:19,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491359555] [2024-06-27 19:32:19,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:19,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:19,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:19,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:19,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:19,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491359555] [2024-06-27 19:32:19,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491359555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:19,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:19,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:19,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330754300] [2024-06-27 19:32:19,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:19,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:19,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:19,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:19,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:19,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:19,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 219 transitions, 2747 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:19,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:19,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:19,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:20,045 INFO L124 PetriNetUnfolderBase]: 1705/2890 cut-off events. [2024-06-27 19:32:20,046 INFO L125 PetriNetUnfolderBase]: For 113605/113613 co-relation queries the response was YES. [2024-06-27 19:32:20,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18385 conditions, 2890 events. 1705/2890 cut-off events. For 113605/113613 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 17134 event pairs, 388 based on Foata normal form. 2/2887 useless extension candidates. Maximal degree in co-relation 18307. Up to 2463 conditions per place. [2024-06-27 19:32:20,069 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 205 selfloop transitions, 50 changer transitions 0/263 dead transitions. [2024-06-27 19:32:20,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 263 transitions, 3711 flow [2024-06-27 19:32:20,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:20,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:20,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-27 19:32:20,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260162601626016 [2024-06-27 19:32:20,071 INFO L175 Difference]: Start difference. First operand has 163 places, 219 transitions, 2747 flow. Second operand 6 states and 154 transitions. [2024-06-27 19:32:20,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 263 transitions, 3711 flow [2024-06-27 19:32:20,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 263 transitions, 3574 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:20,275 INFO L231 Difference]: Finished difference. Result has 169 places, 237 transitions, 2984 flow [2024-06-27 19:32:20,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2610, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2984, PETRI_PLACES=169, PETRI_TRANSITIONS=237} [2024-06-27 19:32:20,280 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 127 predicate places. [2024-06-27 19:32:20,280 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 237 transitions, 2984 flow [2024-06-27 19:32:20,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:20,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:20,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:20,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 19:32:20,290 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:20,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:20,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1611876245, now seen corresponding path program 2 times [2024-06-27 19:32:20,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:20,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258765557] [2024-06-27 19:32:20,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:20,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:20,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:20,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:20,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:20,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258765557] [2024-06-27 19:32:20,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258765557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:20,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:20,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:20,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586347751] [2024-06-27 19:32:20,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:20,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:20,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:20,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:20,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:20,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:20,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 237 transitions, 2984 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:20,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:20,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:20,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:20,825 INFO L124 PetriNetUnfolderBase]: 1728/2943 cut-off events. [2024-06-27 19:32:20,825 INFO L125 PetriNetUnfolderBase]: For 118047/118049 co-relation queries the response was YES. [2024-06-27 19:32:20,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19254 conditions, 2943 events. 1728/2943 cut-off events. For 118047/118049 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 17575 event pairs, 370 based on Foata normal form. 1/2942 useless extension candidates. Maximal degree in co-relation 19171. Up to 2594 conditions per place. [2024-06-27 19:32:20,850 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 224 selfloop transitions, 36 changer transitions 0/268 dead transitions. [2024-06-27 19:32:20,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 268 transitions, 3803 flow [2024-06-27 19:32:20,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:20,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:20,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-27 19:32:20,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-27 19:32:20,852 INFO L175 Difference]: Start difference. First operand has 169 places, 237 transitions, 2984 flow. Second operand 7 states and 168 transitions. [2024-06-27 19:32:20,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 268 transitions, 3803 flow [2024-06-27 19:32:20,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 268 transitions, 3733 flow, removed 35 selfloop flow, removed 0 redundant places. [2024-06-27 19:32:20,997 INFO L231 Difference]: Finished difference. Result has 177 places, 249 transitions, 3181 flow [2024-06-27 19:32:20,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2926, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3181, PETRI_PLACES=177, PETRI_TRANSITIONS=249} [2024-06-27 19:32:20,998 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 135 predicate places. [2024-06-27 19:32:20,998 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 249 transitions, 3181 flow [2024-06-27 19:32:20,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:20,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:20,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:20,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 19:32:20,999 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:20,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:20,999 INFO L85 PathProgramCache]: Analyzing trace with hash -705904862, now seen corresponding path program 6 times [2024-06-27 19:32:20,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:20,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742047164] [2024-06-27 19:32:21,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:21,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:21,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:21,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:21,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:21,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742047164] [2024-06-27 19:32:21,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742047164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:21,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:21,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:21,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835012968] [2024-06-27 19:32:21,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:21,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:21,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:21,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:21,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:21,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:21,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 249 transitions, 3181 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:21,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:21,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:21,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:21,539 INFO L124 PetriNetUnfolderBase]: 1700/2881 cut-off events. [2024-06-27 19:32:21,539 INFO L125 PetriNetUnfolderBase]: For 121739/121739 co-relation queries the response was YES. [2024-06-27 19:32:21,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18418 conditions, 2881 events. 1700/2881 cut-off events. For 121739/121739 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 17014 event pairs, 390 based on Foata normal form. 16/2866 useless extension candidates. Maximal degree in co-relation 18331. Up to 2257 conditions per place. [2024-06-27 19:32:21,562 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 176 selfloop transitions, 97 changer transitions 0/281 dead transitions. [2024-06-27 19:32:21,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 281 transitions, 3845 flow [2024-06-27 19:32:21,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:32:21,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:32:21,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-27 19:32:21,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-27 19:32:21,564 INFO L175 Difference]: Start difference. First operand has 177 places, 249 transitions, 3181 flow. Second operand 8 states and 197 transitions. [2024-06-27 19:32:21,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 281 transitions, 3845 flow [2024-06-27 19:32:21,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 281 transitions, 3739 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:21,728 INFO L231 Difference]: Finished difference. Result has 182 places, 249 transitions, 3280 flow [2024-06-27 19:32:21,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3075, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3280, PETRI_PLACES=182, PETRI_TRANSITIONS=249} [2024-06-27 19:32:21,728 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 140 predicate places. [2024-06-27 19:32:21,728 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 249 transitions, 3280 flow [2024-06-27 19:32:21,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:21,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:21,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:21,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 19:32:21,729 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:21,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:21,729 INFO L85 PathProgramCache]: Analyzing trace with hash -705908582, now seen corresponding path program 7 times [2024-06-27 19:32:21,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:21,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240959039] [2024-06-27 19:32:21,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:21,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:21,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:21,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:21,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:21,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240959039] [2024-06-27 19:32:21,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240959039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:21,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:21,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:32:21,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157287349] [2024-06-27 19:32:21,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:21,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:32:21,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:21,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:32:21,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:32:21,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:21,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 249 transitions, 3280 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:21,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:21,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:21,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:22,412 INFO L124 PetriNetUnfolderBase]: 1741/2952 cut-off events. [2024-06-27 19:32:22,413 INFO L125 PetriNetUnfolderBase]: For 126004/126004 co-relation queries the response was YES. [2024-06-27 19:32:22,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19020 conditions, 2952 events. 1741/2952 cut-off events. For 126004/126004 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 17609 event pairs, 385 based on Foata normal form. 12/2933 useless extension candidates. Maximal degree in co-relation 18932. Up to 2238 conditions per place. [2024-06-27 19:32:22,439 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 181 selfloop transitions, 100 changer transitions 0/289 dead transitions. [2024-06-27 19:32:22,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 289 transitions, 4020 flow [2024-06-27 19:32:22,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:32:22,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:32:22,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-27 19:32:22,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5989159891598916 [2024-06-27 19:32:22,444 INFO L175 Difference]: Start difference. First operand has 182 places, 249 transitions, 3280 flow. Second operand 9 states and 221 transitions. [2024-06-27 19:32:22,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 289 transitions, 4020 flow [2024-06-27 19:32:22,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 289 transitions, 3890 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:22,622 INFO L231 Difference]: Finished difference. Result has 186 places, 250 transitions, 3392 flow [2024-06-27 19:32:22,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3150, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3392, PETRI_PLACES=186, PETRI_TRANSITIONS=250} [2024-06-27 19:32:22,624 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 144 predicate places. [2024-06-27 19:32:22,625 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 250 transitions, 3392 flow [2024-06-27 19:32:22,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:22,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:22,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:22,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 19:32:22,625 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:22,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:22,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1711816828, now seen corresponding path program 8 times [2024-06-27 19:32:22,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:22,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746975600] [2024-06-27 19:32:22,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:22,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:22,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:22,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:22,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:22,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746975600] [2024-06-27 19:32:22,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746975600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:22,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:22,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:22,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919841246] [2024-06-27 19:32:22,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:22,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:22,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:22,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:22,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:22,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:22,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 250 transitions, 3392 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:22,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:22,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:22,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:23,209 INFO L124 PetriNetUnfolderBase]: 1774/3024 cut-off events. [2024-06-27 19:32:23,210 INFO L125 PetriNetUnfolderBase]: For 135147/135153 co-relation queries the response was YES. [2024-06-27 19:32:23,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19374 conditions, 3024 events. 1774/3024 cut-off events. For 135147/135153 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 18256 event pairs, 404 based on Foata normal form. 20/3025 useless extension candidates. Maximal degree in co-relation 19284. Up to 2393 conditions per place. [2024-06-27 19:32:23,238 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 177 selfloop transitions, 94 changer transitions 0/279 dead transitions. [2024-06-27 19:32:23,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 279 transitions, 4074 flow [2024-06-27 19:32:23,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:23,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:23,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 19:32:23,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 19:32:23,254 INFO L175 Difference]: Start difference. First operand has 186 places, 250 transitions, 3392 flow. Second operand 7 states and 175 transitions. [2024-06-27 19:32:23,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 279 transitions, 4074 flow [2024-06-27 19:32:23,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 279 transitions, 3846 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-27 19:32:23,468 INFO L231 Difference]: Finished difference. Result has 186 places, 251 transitions, 3399 flow [2024-06-27 19:32:23,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3164, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3399, PETRI_PLACES=186, PETRI_TRANSITIONS=251} [2024-06-27 19:32:23,468 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 144 predicate places. [2024-06-27 19:32:23,468 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 251 transitions, 3399 flow [2024-06-27 19:32:23,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:23,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:23,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:23,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 19:32:23,469 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:23,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:23,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1246932014, now seen corresponding path program 2 times [2024-06-27 19:32:23,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:23,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139905454] [2024-06-27 19:32:23,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:23,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:23,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:23,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:23,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:23,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139905454] [2024-06-27 19:32:23,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139905454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:23,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:23,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:23,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201180693] [2024-06-27 19:32:23,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:23,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:23,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:23,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:23,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:23,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:23,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 251 transitions, 3399 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:23,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:23,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:23,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:24,025 INFO L124 PetriNetUnfolderBase]: 1815/3100 cut-off events. [2024-06-27 19:32:24,025 INFO L125 PetriNetUnfolderBase]: For 137543/137549 co-relation queries the response was YES. [2024-06-27 19:32:24,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19709 conditions, 3100 events. 1815/3100 cut-off events. For 137543/137549 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 18865 event pairs, 404 based on Foata normal form. 16/3097 useless extension candidates. Maximal degree in co-relation 19618. Up to 2374 conditions per place. [2024-06-27 19:32:24,048 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 180 selfloop transitions, 95 changer transitions 0/283 dead transitions. [2024-06-27 19:32:24,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 283 transitions, 4103 flow [2024-06-27 19:32:24,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:24,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:24,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-27 19:32:24,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-27 19:32:24,050 INFO L175 Difference]: Start difference. First operand has 186 places, 251 transitions, 3399 flow. Second operand 7 states and 178 transitions. [2024-06-27 19:32:24,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 283 transitions, 4103 flow [2024-06-27 19:32:24,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 283 transitions, 3890 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:24,252 INFO L231 Difference]: Finished difference. Result has 188 places, 252 transitions, 3422 flow [2024-06-27 19:32:24,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3186, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3422, PETRI_PLACES=188, PETRI_TRANSITIONS=252} [2024-06-27 19:32:24,252 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 146 predicate places. [2024-06-27 19:32:24,252 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 252 transitions, 3422 flow [2024-06-27 19:32:24,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:24,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:24,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:24,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 19:32:24,253 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:24,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:24,253 INFO L85 PathProgramCache]: Analyzing trace with hash -685071406, now seen corresponding path program 3 times [2024-06-27 19:32:24,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:24,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379193332] [2024-06-27 19:32:24,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:24,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:24,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:24,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:24,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:24,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379193332] [2024-06-27 19:32:24,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379193332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:24,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:24,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:24,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29038603] [2024-06-27 19:32:24,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:24,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:24,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:24,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:24,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:24,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:24,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 252 transitions, 3422 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:24,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:24,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:24,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:24,749 INFO L124 PetriNetUnfolderBase]: 1795/3078 cut-off events. [2024-06-27 19:32:24,749 INFO L125 PetriNetUnfolderBase]: For 129987/129993 co-relation queries the response was YES. [2024-06-27 19:32:24,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18958 conditions, 3078 events. 1795/3078 cut-off events. For 129987/129993 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 18781 event pairs, 349 based on Foata normal form. 16/3075 useless extension candidates. Maximal degree in co-relation 18866. Up to 1713 conditions per place. [2024-06-27 19:32:24,774 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 171 selfloop transitions, 104 changer transitions 0/283 dead transitions. [2024-06-27 19:32:24,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 283 transitions, 4014 flow [2024-06-27 19:32:24,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:24,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:24,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-27 19:32:24,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-27 19:32:24,776 INFO L175 Difference]: Start difference. First operand has 188 places, 252 transitions, 3422 flow. Second operand 7 states and 177 transitions. [2024-06-27 19:32:24,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 283 transitions, 4014 flow [2024-06-27 19:32:25,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 283 transitions, 3786 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 19:32:25,035 INFO L231 Difference]: Finished difference. Result has 188 places, 251 transitions, 3332 flow [2024-06-27 19:32:25,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3120, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3332, PETRI_PLACES=188, PETRI_TRANSITIONS=251} [2024-06-27 19:32:25,036 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 146 predicate places. [2024-06-27 19:32:25,036 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 251 transitions, 3332 flow [2024-06-27 19:32:25,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:25,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:25,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:25,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 19:32:25,037 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)] === [2024-06-27 19:32:25,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:25,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1021601257, now seen corresponding path program 3 times [2024-06-27 19:32:25,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:25,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631376545] [2024-06-27 19:32:25,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:25,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:25,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:25,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:25,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:25,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631376545] [2024-06-27 19:32:25,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631376545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:25,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:25,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:25,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993749896] [2024-06-27 19:32:25,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:25,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:25,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:25,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:25,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:25,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:25,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 251 transitions, 3332 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:25,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:25,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:25,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:25,544 INFO L124 PetriNetUnfolderBase]: 1800/3056 cut-off events. [2024-06-27 19:32:25,545 INFO L125 PetriNetUnfolderBase]: For 118215/118215 co-relation queries the response was YES. [2024-06-27 19:32:25,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18908 conditions, 3056 events. 1800/3056 cut-off events. For 118215/118215 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 18482 event pairs, 400 based on Foata normal form. 1/3041 useless extension candidates. Maximal degree in co-relation 18816. Up to 2619 conditions per place. [2024-06-27 19:32:25,571 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 210 selfloop transitions, 64 changer transitions 0/282 dead transitions. [2024-06-27 19:32:25,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 282 transitions, 4371 flow [2024-06-27 19:32:25,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:25,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:25,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-27 19:32:25,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 19:32:25,572 INFO L175 Difference]: Start difference. First operand has 188 places, 251 transitions, 3332 flow. Second operand 6 states and 150 transitions. [2024-06-27 19:32:25,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 282 transitions, 4371 flow [2024-06-27 19:32:25,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 282 transitions, 4071 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 19:32:25,809 INFO L231 Difference]: Finished difference. Result has 189 places, 260 transitions, 3339 flow [2024-06-27 19:32:25,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3032, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3339, PETRI_PLACES=189, PETRI_TRANSITIONS=260} [2024-06-27 19:32:25,810 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 147 predicate places. [2024-06-27 19:32:25,810 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 260 transitions, 3339 flow [2024-06-27 19:32:25,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:25,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:25,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:25,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 19:32:25,811 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)] === [2024-06-27 19:32:25,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:25,811 INFO L85 PathProgramCache]: Analyzing trace with hash -565135467, now seen corresponding path program 4 times [2024-06-27 19:32:25,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:25,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079685937] [2024-06-27 19:32:25,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:25,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:25,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:25,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:25,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:25,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079685937] [2024-06-27 19:32:25,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079685937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:25,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:25,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:25,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358634519] [2024-06-27 19:32:25,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:25,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:25,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:25,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:25,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:25,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:25,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 260 transitions, 3339 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:25,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:25,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:25,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:26,270 INFO L124 PetriNetUnfolderBase]: 1805/3067 cut-off events. [2024-06-27 19:32:26,271 INFO L125 PetriNetUnfolderBase]: For 119630/119630 co-relation queries the response was YES. [2024-06-27 19:32:26,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18541 conditions, 3067 events. 1805/3067 cut-off events. For 119630/119630 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 18575 event pairs, 400 based on Foata normal form. 1/3052 useless extension candidates. Maximal degree in co-relation 18448. Up to 2623 conditions per place. [2024-06-27 19:32:26,294 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 205 selfloop transitions, 69 changer transitions 0/282 dead transitions. [2024-06-27 19:32:26,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 282 transitions, 4211 flow [2024-06-27 19:32:26,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:26,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:26,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-27 19:32:26,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-27 19:32:26,295 INFO L175 Difference]: Start difference. First operand has 189 places, 260 transitions, 3339 flow. Second operand 6 states and 146 transitions. [2024-06-27 19:32:26,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 282 transitions, 4211 flow [2024-06-27 19:32:26,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 282 transitions, 4110 flow, removed 43 selfloop flow, removed 1 redundant places. [2024-06-27 19:32:26,523 INFO L231 Difference]: Finished difference. Result has 194 places, 264 transitions, 3458 flow [2024-06-27 19:32:26,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3256, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3458, PETRI_PLACES=194, PETRI_TRANSITIONS=264} [2024-06-27 19:32:26,523 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 152 predicate places. [2024-06-27 19:32:26,523 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 264 transitions, 3458 flow [2024-06-27 19:32:26,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:26,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:26,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:26,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 19:32:26,524 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:26,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:26,524 INFO L85 PathProgramCache]: Analyzing trace with hash -2128800201, now seen corresponding path program 5 times [2024-06-27 19:32:26,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:26,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842511097] [2024-06-27 19:32:26,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:26,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:26,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:26,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:26,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:26,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842511097] [2024-06-27 19:32:26,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842511097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:26,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:26,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:26,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360736618] [2024-06-27 19:32:26,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:26,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:26,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:26,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:26,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:26,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:26,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 264 transitions, 3458 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:26,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:26,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:26,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:27,014 INFO L124 PetriNetUnfolderBase]: 1810/3080 cut-off events. [2024-06-27 19:32:27,014 INFO L125 PetriNetUnfolderBase]: For 123431/123431 co-relation queries the response was YES. [2024-06-27 19:32:27,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18716 conditions, 3080 events. 1810/3080 cut-off events. For 123431/123431 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 18670 event pairs, 385 based on Foata normal form. 1/3068 useless extension candidates. Maximal degree in co-relation 18621. Up to 2588 conditions per place. [2024-06-27 19:32:27,039 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 188 selfloop transitions, 96 changer transitions 0/292 dead transitions. [2024-06-27 19:32:27,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 292 transitions, 4366 flow [2024-06-27 19:32:27,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:27,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:27,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-27 19:32:27,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-27 19:32:27,041 INFO L175 Difference]: Start difference. First operand has 194 places, 264 transitions, 3458 flow. Second operand 6 states and 156 transitions. [2024-06-27 19:32:27,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 292 transitions, 4366 flow [2024-06-27 19:32:27,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 292 transitions, 4204 flow, removed 32 selfloop flow, removed 2 redundant places. [2024-06-27 19:32:27,307 INFO L231 Difference]: Finished difference. Result has 199 places, 268 transitions, 3627 flow [2024-06-27 19:32:27,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3304, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3627, PETRI_PLACES=199, PETRI_TRANSITIONS=268} [2024-06-27 19:32:27,307 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 157 predicate places. [2024-06-27 19:32:27,307 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 268 transitions, 3627 flow [2024-06-27 19:32:27,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:27,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:27,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:27,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 19:32:27,308 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:27,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:27,309 INFO L85 PathProgramCache]: Analyzing trace with hash -2135466441, now seen corresponding path program 6 times [2024-06-27 19:32:27,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:27,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262074569] [2024-06-27 19:32:27,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:27,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:27,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:27,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:27,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:27,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262074569] [2024-06-27 19:32:27,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262074569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:27,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:27,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:27,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791738995] [2024-06-27 19:32:27,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:27,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:27,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:27,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:27,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:27,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:27,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 268 transitions, 3627 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:27,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:27,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:27,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:27,801 INFO L124 PetriNetUnfolderBase]: 1807/3080 cut-off events. [2024-06-27 19:32:27,801 INFO L125 PetriNetUnfolderBase]: For 126414/126416 co-relation queries the response was YES. [2024-06-27 19:32:27,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18932 conditions, 3080 events. 1807/3080 cut-off events. For 126414/126416 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 18664 event pairs, 371 based on Foata normal form. 1/3079 useless extension candidates. Maximal degree in co-relation 18835. Up to 2586 conditions per place. [2024-06-27 19:32:27,828 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 194 selfloop transitions, 95 changer transitions 0/297 dead transitions. [2024-06-27 19:32:27,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 297 transitions, 4399 flow [2024-06-27 19:32:27,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:27,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:27,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-27 19:32:27,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627177700348432 [2024-06-27 19:32:27,829 INFO L175 Difference]: Start difference. First operand has 199 places, 268 transitions, 3627 flow. Second operand 7 states and 180 transitions. [2024-06-27 19:32:27,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 297 transitions, 4399 flow [2024-06-27 19:32:28,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 297 transitions, 4257 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:28,100 INFO L231 Difference]: Finished difference. Result has 203 places, 268 transitions, 3707 flow [2024-06-27 19:32:28,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3485, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3707, PETRI_PLACES=203, PETRI_TRANSITIONS=268} [2024-06-27 19:32:28,101 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 161 predicate places. [2024-06-27 19:32:28,101 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 268 transitions, 3707 flow [2024-06-27 19:32:28,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:28,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:28,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:28,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 19:32:28,102 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:28,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:28,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1431291110, now seen corresponding path program 1 times [2024-06-27 19:32:28,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:28,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051744642] [2024-06-27 19:32:28,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:28,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:28,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:28,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:28,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:28,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051744642] [2024-06-27 19:32:28,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051744642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:28,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:28,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:28,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702166192] [2024-06-27 19:32:28,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:28,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:28,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:28,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:28,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:28,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:28,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 268 transitions, 3707 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:28,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:28,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:28,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:28,580 INFO L124 PetriNetUnfolderBase]: 1828/3116 cut-off events. [2024-06-27 19:32:28,580 INFO L125 PetriNetUnfolderBase]: For 136435/136441 co-relation queries the response was YES. [2024-06-27 19:32:28,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19486 conditions, 3116 events. 1828/3116 cut-off events. For 136435/136441 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 18982 event pairs, 394 based on Foata normal form. 2/3114 useless extension candidates. Maximal degree in co-relation 19388. Up to 2652 conditions per place. [2024-06-27 19:32:28,606 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 212 selfloop transitions, 80 changer transitions 0/300 dead transitions. [2024-06-27 19:32:28,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 300 transitions, 4718 flow [2024-06-27 19:32:28,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:28,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:28,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-27 19:32:28,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-27 19:32:28,608 INFO L175 Difference]: Start difference. First operand has 203 places, 268 transitions, 3707 flow. Second operand 6 states and 153 transitions. [2024-06-27 19:32:28,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 300 transitions, 4718 flow [2024-06-27 19:32:28,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 300 transitions, 4574 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:28,828 INFO L231 Difference]: Finished difference. Result has 204 places, 277 transitions, 3886 flow [2024-06-27 19:32:28,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3570, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3886, PETRI_PLACES=204, PETRI_TRANSITIONS=277} [2024-06-27 19:32:28,829 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 162 predicate places. [2024-06-27 19:32:28,829 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 277 transitions, 3886 flow [2024-06-27 19:32:28,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:28,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:28,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:28,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 19:32:28,829 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:28,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:28,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1431170954, now seen corresponding path program 1 times [2024-06-27 19:32:28,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:28,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814770683] [2024-06-27 19:32:28,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:28,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:28,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:28,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:28,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:28,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814770683] [2024-06-27 19:32:28,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814770683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:28,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:28,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:28,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790273731] [2024-06-27 19:32:28,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:28,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:28,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:28,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:28,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:28,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:28,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 277 transitions, 3886 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:28,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:28,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:28,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:29,350 INFO L124 PetriNetUnfolderBase]: 1841/3133 cut-off events. [2024-06-27 19:32:29,350 INFO L125 PetriNetUnfolderBase]: For 138034/138042 co-relation queries the response was YES. [2024-06-27 19:32:29,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19660 conditions, 3133 events. 1841/3133 cut-off events. For 138034/138042 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 19074 event pairs, 396 based on Foata normal form. 2/3130 useless extension candidates. Maximal degree in co-relation 19562. Up to 2577 conditions per place. [2024-06-27 19:32:29,375 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 220 selfloop transitions, 89 changer transitions 0/317 dead transitions. [2024-06-27 19:32:29,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 317 transitions, 4974 flow [2024-06-27 19:32:29,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:29,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:29,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 19:32:29,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 19:32:29,376 INFO L175 Difference]: Start difference. First operand has 204 places, 277 transitions, 3886 flow. Second operand 7 states and 175 transitions. [2024-06-27 19:32:29,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 317 transitions, 4974 flow [2024-06-27 19:32:29,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 317 transitions, 4851 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-27 19:32:29,704 INFO L231 Difference]: Finished difference. Result has 211 places, 292 transitions, 4215 flow [2024-06-27 19:32:29,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3763, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4215, PETRI_PLACES=211, PETRI_TRANSITIONS=292} [2024-06-27 19:32:29,705 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 169 predicate places. [2024-06-27 19:32:29,705 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 292 transitions, 4215 flow [2024-06-27 19:32:29,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:29,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:29,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:29,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 19:32:29,706 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:29,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:29,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1431171140, now seen corresponding path program 2 times [2024-06-27 19:32:29,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:29,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541429513] [2024-06-27 19:32:29,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:29,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:29,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:29,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:29,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:29,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541429513] [2024-06-27 19:32:29,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541429513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:29,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:29,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:29,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399143154] [2024-06-27 19:32:29,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:29,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:29,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:29,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:29,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:29,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:29,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 292 transitions, 4215 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:29,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:29,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:29,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:30,262 INFO L124 PetriNetUnfolderBase]: 1846/3144 cut-off events. [2024-06-27 19:32:30,262 INFO L125 PetriNetUnfolderBase]: For 146197/146205 co-relation queries the response was YES. [2024-06-27 19:32:30,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20408 conditions, 3144 events. 1846/3144 cut-off events. For 146197/146205 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 19170 event pairs, 392 based on Foata normal form. 2/3141 useless extension candidates. Maximal degree in co-relation 20307. Up to 2676 conditions per place. [2024-06-27 19:32:30,292 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 230 selfloop transitions, 80 changer transitions 0/318 dead transitions. [2024-06-27 19:32:30,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 318 transitions, 5063 flow [2024-06-27 19:32:30,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:30,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:30,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-27 19:32:30,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-27 19:32:30,293 INFO L175 Difference]: Start difference. First operand has 211 places, 292 transitions, 4215 flow. Second operand 7 states and 171 transitions. [2024-06-27 19:32:30,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 318 transitions, 5063 flow [2024-06-27 19:32:30,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 318 transitions, 4975 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-27 19:32:30,620 INFO L231 Difference]: Finished difference. Result has 216 places, 295 transitions, 4343 flow [2024-06-27 19:32:30,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4127, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4343, PETRI_PLACES=216, PETRI_TRANSITIONS=295} [2024-06-27 19:32:30,620 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 174 predicate places. [2024-06-27 19:32:30,620 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 295 transitions, 4343 flow [2024-06-27 19:32:30,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:30,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:30,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:30,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 19:32:30,621 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:30,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:30,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1743932792, now seen corresponding path program 3 times [2024-06-27 19:32:30,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:30,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892800284] [2024-06-27 19:32:30,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:30,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:30,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:30,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:30,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:30,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892800284] [2024-06-27 19:32:30,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892800284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:30,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:30,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:30,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980051974] [2024-06-27 19:32:30,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:30,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:30,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:30,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:30,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:30,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:30,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 295 transitions, 4343 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:30,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:30,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:30,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:31,182 INFO L124 PetriNetUnfolderBase]: 1843/3142 cut-off events. [2024-06-27 19:32:31,182 INFO L125 PetriNetUnfolderBase]: For 148280/148282 co-relation queries the response was YES. [2024-06-27 19:32:31,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20475 conditions, 3142 events. 1843/3142 cut-off events. For 148280/148282 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 19130 event pairs, 369 based on Foata normal form. 1/3141 useless extension candidates. Maximal degree in co-relation 20372. Up to 2787 conditions per place. [2024-06-27 19:32:31,206 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 269 selfloop transitions, 36 changer transitions 0/313 dead transitions. [2024-06-27 19:32:31,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 313 transitions, 5023 flow [2024-06-27 19:32:31,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:31,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:31,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-27 19:32:31,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-27 19:32:31,208 INFO L175 Difference]: Start difference. First operand has 216 places, 295 transitions, 4343 flow. Second operand 7 states and 166 transitions. [2024-06-27 19:32:31,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 313 transitions, 5023 flow [2024-06-27 19:32:31,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 313 transitions, 4833 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:31,521 INFO L231 Difference]: Finished difference. Result has 218 places, 295 transitions, 4237 flow [2024-06-27 19:32:31,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4155, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4237, PETRI_PLACES=218, PETRI_TRANSITIONS=295} [2024-06-27 19:32:31,522 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 176 predicate places. [2024-06-27 19:32:31,522 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 295 transitions, 4237 flow [2024-06-27 19:32:31,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:31,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:31,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:31,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 19:32:31,523 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:31,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:31,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1110561440, now seen corresponding path program 2 times [2024-06-27 19:32:31,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:31,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759713636] [2024-06-27 19:32:31,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:31,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:31,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:31,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:31,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:31,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759713636] [2024-06-27 19:32:31,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759713636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:31,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:31,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:31,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661579358] [2024-06-27 19:32:31,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:31,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:31,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:31,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:31,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:31,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:31,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 295 transitions, 4237 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:31,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:31,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:31,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:32,108 INFO L124 PetriNetUnfolderBase]: 1885/3206 cut-off events. [2024-06-27 19:32:32,109 INFO L125 PetriNetUnfolderBase]: For 158903/158905 co-relation queries the response was YES. [2024-06-27 19:32:32,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21060 conditions, 3206 events. 1885/3206 cut-off events. For 158903/158905 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 19549 event pairs, 370 based on Foata normal form. 2/3206 useless extension candidates. Maximal degree in co-relation 20956. Up to 2788 conditions per place. [2024-06-27 19:32:32,137 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 263 selfloop transitions, 65 changer transitions 0/336 dead transitions. [2024-06-27 19:32:32,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 336 transitions, 5482 flow [2024-06-27 19:32:32,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:32:32,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:32:32,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-27 19:32:32,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-27 19:32:32,138 INFO L175 Difference]: Start difference. First operand has 218 places, 295 transitions, 4237 flow. Second operand 8 states and 193 transitions. [2024-06-27 19:32:32,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 336 transitions, 5482 flow [2024-06-27 19:32:32,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 336 transitions, 5425 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:32,510 INFO L231 Difference]: Finished difference. Result has 222 places, 313 transitions, 4629 flow [2024-06-27 19:32:32,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4180, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4629, PETRI_PLACES=222, PETRI_TRANSITIONS=313} [2024-06-27 19:32:32,511 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 180 predicate places. [2024-06-27 19:32:32,511 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 313 transitions, 4629 flow [2024-06-27 19:32:32,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:32,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:32,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:32,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 19:32:32,512 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)] === [2024-06-27 19:32:32,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:32,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1253802284, now seen corresponding path program 3 times [2024-06-27 19:32:32,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:32,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849210911] [2024-06-27 19:32:32,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:32,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:32,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:32,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:32,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:32,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849210911] [2024-06-27 19:32:32,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849210911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:32,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:32,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:32,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521742782] [2024-06-27 19:32:32,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:32,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:32,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:32,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:32,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:32,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:32,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 313 transitions, 4629 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:32,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:32,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:32,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:33,169 INFO L124 PetriNetUnfolderBase]: 1879/3196 cut-off events. [2024-06-27 19:32:33,169 INFO L125 PetriNetUnfolderBase]: For 164341/164343 co-relation queries the response was YES. [2024-06-27 19:32:33,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21503 conditions, 3196 events. 1879/3196 cut-off events. For 164341/164343 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 19495 event pairs, 370 based on Foata normal form. 2/3196 useless extension candidates. Maximal degree in co-relation 21397. Up to 2784 conditions per place. [2024-06-27 19:32:33,195 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 263 selfloop transitions, 65 changer transitions 0/336 dead transitions. [2024-06-27 19:32:33,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 336 transitions, 5501 flow [2024-06-27 19:32:33,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:32:33,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:32:33,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-27 19:32:33,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5718157181571816 [2024-06-27 19:32:33,196 INFO L175 Difference]: Start difference. First operand has 222 places, 313 transitions, 4629 flow. Second operand 9 states and 211 transitions. [2024-06-27 19:32:33,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 336 transitions, 5501 flow [2024-06-27 19:32:33,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 336 transitions, 5293 flow, removed 82 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:33,604 INFO L231 Difference]: Finished difference. Result has 228 places, 313 transitions, 4561 flow [2024-06-27 19:32:33,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4421, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4561, PETRI_PLACES=228, PETRI_TRANSITIONS=313} [2024-06-27 19:32:33,605 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 186 predicate places. [2024-06-27 19:32:33,605 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 313 transitions, 4561 flow [2024-06-27 19:32:33,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:33,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:33,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:33,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 19:32:33,606 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)] === [2024-06-27 19:32:33,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:33,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1571196638, now seen corresponding path program 1 times [2024-06-27 19:32:33,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:33,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289436729] [2024-06-27 19:32:33,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:33,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:33,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:33,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:33,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:33,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289436729] [2024-06-27 19:32:33,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289436729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:33,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:33,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:33,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210343310] [2024-06-27 19:32:33,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:33,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:33,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:33,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:33,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:33,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-27 19:32:33,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 313 transitions, 4561 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) [2024-06-27 19:32:33,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:33,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-27 19:32:33,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:34,198 INFO L124 PetriNetUnfolderBase]: 1831/3145 cut-off events. [2024-06-27 19:32:34,199 INFO L125 PetriNetUnfolderBase]: For 180493/180495 co-relation queries the response was YES. [2024-06-27 19:32:34,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21252 conditions, 3145 events. 1831/3145 cut-off events. For 180493/180495 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 19347 event pairs, 359 based on Foata normal form. 10/3132 useless extension candidates. Maximal degree in co-relation 21144. Up to 2624 conditions per place. [2024-06-27 19:32:34,228 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 253 selfloop transitions, 40 changer transitions 0/335 dead transitions. [2024-06-27 19:32:34,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 335 transitions, 5239 flow [2024-06-27 19:32:34,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:34,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:34,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 19:32:34,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-27 19:32:34,229 INFO L175 Difference]: Start difference. First operand has 228 places, 313 transitions, 4561 flow. Second operand 7 states and 172 transitions. [2024-06-27 19:32:34,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 335 transitions, 5239 flow [2024-06-27 19:32:34,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 335 transitions, 5097 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 19:32:34,647 INFO L231 Difference]: Finished difference. Result has 228 places, 314 transitions, 4519 flow [2024-06-27 19:32:34,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4419, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4519, PETRI_PLACES=228, PETRI_TRANSITIONS=314} [2024-06-27 19:32:34,648 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 186 predicate places. [2024-06-27 19:32:34,648 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 314 transitions, 4519 flow [2024-06-27 19:32:34,648 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) [2024-06-27 19:32:34,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:34,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:34,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 19:32:34,648 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)] === [2024-06-27 19:32:34,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:34,649 INFO L85 PathProgramCache]: Analyzing trace with hash -466733658, now seen corresponding path program 4 times [2024-06-27 19:32:34,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:34,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353650510] [2024-06-27 19:32:34,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:34,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:34,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:34,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:34,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:34,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353650510] [2024-06-27 19:32:34,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353650510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:34,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:34,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:34,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725350435] [2024-06-27 19:32:34,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:34,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:34,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:34,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:34,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:34,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:34,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 314 transitions, 4519 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:34,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:34,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:34,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:35,230 INFO L124 PetriNetUnfolderBase]: 1920/3259 cut-off events. [2024-06-27 19:32:35,231 INFO L125 PetriNetUnfolderBase]: For 176658/176664 co-relation queries the response was YES. [2024-06-27 19:32:35,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22013 conditions, 3259 events. 1920/3259 cut-off events. For 176658/176664 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 19951 event pairs, 409 based on Foata normal form. 5/3254 useless extension candidates. Maximal degree in co-relation 21904. Up to 2785 conditions per place. [2024-06-27 19:32:35,260 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 247 selfloop transitions, 83 changer transitions 0/338 dead transitions. [2024-06-27 19:32:35,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 338 transitions, 5531 flow [2024-06-27 19:32:35,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:35,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:35,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-27 19:32:35,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-27 19:32:35,262 INFO L175 Difference]: Start difference. First operand has 228 places, 314 transitions, 4519 flow. Second operand 6 states and 149 transitions. [2024-06-27 19:32:35,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 338 transitions, 5531 flow [2024-06-27 19:32:35,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 338 transitions, 5451 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:35,647 INFO L231 Difference]: Finished difference. Result has 229 places, 317 transitions, 4668 flow [2024-06-27 19:32:35,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4439, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4668, PETRI_PLACES=229, PETRI_TRANSITIONS=317} [2024-06-27 19:32:35,648 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 187 predicate places. [2024-06-27 19:32:35,648 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 317 transitions, 4668 flow [2024-06-27 19:32:35,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:35,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:35,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:35,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 19:32:35,648 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)] === [2024-06-27 19:32:35,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:35,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1922721958, now seen corresponding path program 5 times [2024-06-27 19:32:35,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:35,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653082614] [2024-06-27 19:32:35,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:35,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:35,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:35,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:35,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:35,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653082614] [2024-06-27 19:32:35,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653082614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:35,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:35,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:35,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202710135] [2024-06-27 19:32:35,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:35,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:35,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:35,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:35,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:35,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:35,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 317 transitions, 4668 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:35,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:35,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:35,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:36,211 INFO L124 PetriNetUnfolderBase]: 1925/3270 cut-off events. [2024-06-27 19:32:36,212 INFO L125 PetriNetUnfolderBase]: For 182611/182617 co-relation queries the response was YES. [2024-06-27 19:32:36,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22265 conditions, 3270 events. 1925/3270 cut-off events. For 182611/182617 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 20040 event pairs, 409 based on Foata normal form. 5/3265 useless extension candidates. Maximal degree in co-relation 22155. Up to 2791 conditions per place. [2024-06-27 19:32:36,243 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 242 selfloop transitions, 88 changer transitions 0/338 dead transitions. [2024-06-27 19:32:36,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 338 transitions, 5577 flow [2024-06-27 19:32:36,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:36,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:36,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-27 19:32:36,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5894308943089431 [2024-06-27 19:32:36,245 INFO L175 Difference]: Start difference. First operand has 229 places, 317 transitions, 4668 flow. Second operand 6 states and 145 transitions. [2024-06-27 19:32:36,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 338 transitions, 5577 flow [2024-06-27 19:32:36,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 338 transitions, 5287 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:36,646 INFO L231 Difference]: Finished difference. Result has 230 places, 321 transitions, 4637 flow [2024-06-27 19:32:36,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4399, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4637, PETRI_PLACES=230, PETRI_TRANSITIONS=321} [2024-06-27 19:32:36,646 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-27 19:32:36,646 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 321 transitions, 4637 flow [2024-06-27 19:32:36,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:36,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:36,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:36,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 19:32:36,647 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)] === [2024-06-27 19:32:36,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:36,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1716411194, now seen corresponding path program 6 times [2024-06-27 19:32:36,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:36,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751271003] [2024-06-27 19:32:36,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:36,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:36,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:36,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:36,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:36,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751271003] [2024-06-27 19:32:36,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751271003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:36,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:36,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:36,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554679191] [2024-06-27 19:32:36,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:36,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:36,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:36,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:36,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:36,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:36,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 321 transitions, 4637 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:36,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:36,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:36,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:37,223 INFO L124 PetriNetUnfolderBase]: 1930/3270 cut-off events. [2024-06-27 19:32:37,224 INFO L125 PetriNetUnfolderBase]: For 184951/184951 co-relation queries the response was YES. [2024-06-27 19:32:37,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22313 conditions, 3270 events. 1930/3270 cut-off events. For 184951/184951 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 20061 event pairs, 412 based on Foata normal form. 1/3253 useless extension candidates. Maximal degree in co-relation 22204. Up to 2797 conditions per place. [2024-06-27 19:32:37,255 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 243 selfloop transitions, 94 changer transitions 0/345 dead transitions. [2024-06-27 19:32:37,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 345 transitions, 5555 flow [2024-06-27 19:32:37,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:37,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:37,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-27 19:32:37,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818815331010453 [2024-06-27 19:32:37,256 INFO L175 Difference]: Start difference. First operand has 230 places, 321 transitions, 4637 flow. Second operand 7 states and 167 transitions. [2024-06-27 19:32:37,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 345 transitions, 5555 flow [2024-06-27 19:32:37,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 345 transitions, 5424 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-27 19:32:37,739 INFO L231 Difference]: Finished difference. Result has 235 places, 324 transitions, 4756 flow [2024-06-27 19:32:37,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4509, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4756, PETRI_PLACES=235, PETRI_TRANSITIONS=324} [2024-06-27 19:32:37,740 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-27 19:32:37,740 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 324 transitions, 4756 flow [2024-06-27 19:32:37,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:37,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:37,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:37,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 19:32:37,741 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:37,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:37,741 INFO L85 PathProgramCache]: Analyzing trace with hash -383159096, now seen corresponding path program 4 times [2024-06-27 19:32:37,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:37,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687918833] [2024-06-27 19:32:37,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:37,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:37,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:37,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:37,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:37,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687918833] [2024-06-27 19:32:37,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687918833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:37,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:37,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:37,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868281554] [2024-06-27 19:32:37,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:37,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:37,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:37,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:37,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:37,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:37,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 324 transitions, 4756 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:37,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:37,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:37,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:38,282 INFO L124 PetriNetUnfolderBase]: 1935/3275 cut-off events. [2024-06-27 19:32:38,283 INFO L125 PetriNetUnfolderBase]: For 191543/191543 co-relation queries the response was YES. [2024-06-27 19:32:38,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22534 conditions, 3275 events. 1935/3275 cut-off events. For 191543/191543 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 20019 event pairs, 420 based on Foata normal form. 1/3256 useless extension candidates. Maximal degree in co-relation 22424. Up to 2693 conditions per place. [2024-06-27 19:32:38,315 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 230 selfloop transitions, 115 changer transitions 0/353 dead transitions. [2024-06-27 19:32:38,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 353 transitions, 6004 flow [2024-06-27 19:32:38,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:38,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:38,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 19:32:38,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-27 19:32:38,316 INFO L175 Difference]: Start difference. First operand has 235 places, 324 transitions, 4756 flow. Second operand 7 states and 172 transitions. [2024-06-27 19:32:38,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 353 transitions, 6004 flow [2024-06-27 19:32:38,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 353 transitions, 5867 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 19:32:38,780 INFO L231 Difference]: Finished difference. Result has 238 places, 330 transitions, 4985 flow [2024-06-27 19:32:38,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4619, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4985, PETRI_PLACES=238, PETRI_TRANSITIONS=330} [2024-06-27 19:32:38,780 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 196 predicate places. [2024-06-27 19:32:38,780 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 330 transitions, 4985 flow [2024-06-27 19:32:38,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:38,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:38,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:38,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 19:32:38,781 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:38,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:38,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1336875236, now seen corresponding path program 7 times [2024-06-27 19:32:38,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:38,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101783171] [2024-06-27 19:32:38,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:38,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:38,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:38,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:38,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:38,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101783171] [2024-06-27 19:32:38,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101783171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:38,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:38,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:38,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22265477] [2024-06-27 19:32:38,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:38,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:38,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:38,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:38,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:38,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:38,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 330 transitions, 4985 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:38,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:38,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:38,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:39,367 INFO L124 PetriNetUnfolderBase]: 1932/3278 cut-off events. [2024-06-27 19:32:39,367 INFO L125 PetriNetUnfolderBase]: For 197152/197152 co-relation queries the response was YES. [2024-06-27 19:32:39,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22670 conditions, 3278 events. 1932/3278 cut-off events. For 197152/197152 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 20089 event pairs, 408 based on Foata normal form. 1/3264 useless extension candidates. Maximal degree in co-relation 22558. Up to 2801 conditions per place. [2024-06-27 19:32:39,398 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 247 selfloop transitions, 96 changer transitions 0/351 dead transitions. [2024-06-27 19:32:39,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 351 transitions, 5977 flow [2024-06-27 19:32:39,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:32:39,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:32:39,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-27 19:32:39,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528455284552846 [2024-06-27 19:32:39,399 INFO L175 Difference]: Start difference. First operand has 238 places, 330 transitions, 4985 flow. Second operand 9 states and 204 transitions. [2024-06-27 19:32:39,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 351 transitions, 5977 flow [2024-06-27 19:32:39,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 351 transitions, 5861 flow, removed 34 selfloop flow, removed 2 redundant places. [2024-06-27 19:32:39,804 INFO L231 Difference]: Finished difference. Result has 245 places, 330 transitions, 5067 flow [2024-06-27 19:32:39,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4869, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5067, PETRI_PLACES=245, PETRI_TRANSITIONS=330} [2024-06-27 19:32:39,805 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 203 predicate places. [2024-06-27 19:32:39,805 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 330 transitions, 5067 flow [2024-06-27 19:32:39,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:39,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:39,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:39,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 19:32:39,806 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:39,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:39,806 INFO L85 PathProgramCache]: Analyzing trace with hash -367844856, now seen corresponding path program 8 times [2024-06-27 19:32:39,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:39,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6068906] [2024-06-27 19:32:39,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:39,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:39,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:39,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:39,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:39,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6068906] [2024-06-27 19:32:39,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6068906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:39,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:39,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:39,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282424744] [2024-06-27 19:32:39,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:39,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:39,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:39,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:39,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:39,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:39,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 330 transitions, 5067 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:39,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:39,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:39,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:40,390 INFO L124 PetriNetUnfolderBase]: 1929/3270 cut-off events. [2024-06-27 19:32:40,390 INFO L125 PetriNetUnfolderBase]: For 201130/201130 co-relation queries the response was YES. [2024-06-27 19:32:40,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22786 conditions, 3270 events. 1929/3270 cut-off events. For 201130/201130 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 19980 event pairs, 408 based on Foata normal form. 1/3256 useless extension candidates. Maximal degree in co-relation 22671. Up to 2798 conditions per place. [2024-06-27 19:32:40,419 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 245 selfloop transitions, 95 changer transitions 0/348 dead transitions. [2024-06-27 19:32:40,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 348 transitions, 5929 flow [2024-06-27 19:32:40,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:40,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:40,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-27 19:32:40,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5749128919860628 [2024-06-27 19:32:40,421 INFO L175 Difference]: Start difference. First operand has 245 places, 330 transitions, 5067 flow. Second operand 7 states and 165 transitions. [2024-06-27 19:32:40,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 348 transitions, 5929 flow [2024-06-27 19:32:40,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 348 transitions, 5711 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:40,954 INFO L231 Difference]: Finished difference. Result has 247 places, 330 transitions, 5045 flow [2024-06-27 19:32:40,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4849, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5045, PETRI_PLACES=247, PETRI_TRANSITIONS=330} [2024-06-27 19:32:40,955 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 205 predicate places. [2024-06-27 19:32:40,955 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 330 transitions, 5045 flow [2024-06-27 19:32:40,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:40,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:40,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:40,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 19:32:40,955 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:40,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:40,956 INFO L85 PathProgramCache]: Analyzing trace with hash 625864, now seen corresponding path program 5 times [2024-06-27 19:32:40,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:40,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335623174] [2024-06-27 19:32:40,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:40,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:40,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:41,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:41,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:41,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335623174] [2024-06-27 19:32:41,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335623174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:41,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:41,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:41,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091239573] [2024-06-27 19:32:41,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:41,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:41,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:41,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:41,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:41,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:41,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 330 transitions, 5045 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:41,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:41,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:41,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:41,516 INFO L124 PetriNetUnfolderBase]: 1942/3289 cut-off events. [2024-06-27 19:32:41,517 INFO L125 PetriNetUnfolderBase]: For 210500/210500 co-relation queries the response was YES. [2024-06-27 19:32:41,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22974 conditions, 3289 events. 1942/3289 cut-off events. For 210500/210500 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 20132 event pairs, 420 based on Foata normal form. 1/3270 useless extension candidates. Maximal degree in co-relation 22858. Up to 2699 conditions per place. [2024-06-27 19:32:41,548 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 227 selfloop transitions, 121 changer transitions 0/356 dead transitions. [2024-06-27 19:32:41,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 356 transitions, 6289 flow [2024-06-27 19:32:41,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:41,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:41,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-27 19:32:41,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-27 19:32:41,550 INFO L175 Difference]: Start difference. First operand has 247 places, 330 transitions, 5045 flow. Second operand 7 states and 170 transitions. [2024-06-27 19:32:41,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 356 transitions, 6289 flow [2024-06-27 19:32:42,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 356 transitions, 6099 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 19:32:42,146 INFO L231 Difference]: Finished difference. Result has 248 places, 336 transitions, 5215 flow [2024-06-27 19:32:42,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4855, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5215, PETRI_PLACES=248, PETRI_TRANSITIONS=336} [2024-06-27 19:32:42,146 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 206 predicate places. [2024-06-27 19:32:42,146 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 336 transitions, 5215 flow [2024-06-27 19:32:42,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:42,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:42,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:42,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 19:32:42,147 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:42,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:42,147 INFO L85 PathProgramCache]: Analyzing trace with hash -338883582, now seen corresponding path program 6 times [2024-06-27 19:32:42,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:42,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641740196] [2024-06-27 19:32:42,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:42,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:42,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:42,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:42,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:42,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641740196] [2024-06-27 19:32:42,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641740196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:42,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:42,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:42,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025101569] [2024-06-27 19:32:42,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:42,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:42,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:42,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:42,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:42,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:42,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 336 transitions, 5215 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:42,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:42,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:42,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:42,781 INFO L124 PetriNetUnfolderBase]: 1939/3295 cut-off events. [2024-06-27 19:32:42,781 INFO L125 PetriNetUnfolderBase]: For 213908/213918 co-relation queries the response was YES. [2024-06-27 19:32:42,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23052 conditions, 3295 events. 1939/3295 cut-off events. For 213908/213918 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 20223 event pairs, 401 based on Foata normal form. 1/3291 useless extension candidates. Maximal degree in co-relation 22935. Up to 2943 conditions per place. [2024-06-27 19:32:42,808 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 300 selfloop transitions, 42 changer transitions 0/350 dead transitions. [2024-06-27 19:32:42,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 350 transitions, 5939 flow [2024-06-27 19:32:42,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:42,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:42,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-27 19:32:42,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5644599303135889 [2024-06-27 19:32:42,810 INFO L175 Difference]: Start difference. First operand has 248 places, 336 transitions, 5215 flow. Second operand 7 states and 162 transitions. [2024-06-27 19:32:42,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 350 transitions, 5939 flow [2024-06-27 19:32:43,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 350 transitions, 5681 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:43,273 INFO L231 Difference]: Finished difference. Result has 252 places, 336 transitions, 5047 flow [2024-06-27 19:32:43,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4957, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5047, PETRI_PLACES=252, PETRI_TRANSITIONS=336} [2024-06-27 19:32:43,274 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 210 predicate places. [2024-06-27 19:32:43,274 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 336 transitions, 5047 flow [2024-06-27 19:32:43,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:43,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:43,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:43,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 19:32:43,275 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)] === [2024-06-27 19:32:43,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:43,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1346615170, now seen corresponding path program 7 times [2024-06-27 19:32:43,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:43,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419056010] [2024-06-27 19:32:43,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:43,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:43,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:43,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:43,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:43,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419056010] [2024-06-27 19:32:43,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419056010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:43,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:43,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:43,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025008164] [2024-06-27 19:32:43,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:43,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:43,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:43,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:43,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:43,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:43,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 336 transitions, 5047 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:43,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:43,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:43,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:43,904 INFO L124 PetriNetUnfolderBase]: 1960/3333 cut-off events. [2024-06-27 19:32:43,904 INFO L125 PetriNetUnfolderBase]: For 220585/220587 co-relation queries the response was YES. [2024-06-27 19:32:43,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23275 conditions, 3333 events. 1960/3333 cut-off events. For 220585/220587 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 20503 event pairs, 388 based on Foata normal form. 1/3331 useless extension candidates. Maximal degree in co-relation 23157. Up to 2869 conditions per place. [2024-06-27 19:32:43,939 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 289 selfloop transitions, 74 changer transitions 0/371 dead transitions. [2024-06-27 19:32:43,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 371 transitions, 6170 flow [2024-06-27 19:32:43,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:43,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:43,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-27 19:32:43,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2024-06-27 19:32:43,940 INFO L175 Difference]: Start difference. First operand has 252 places, 336 transitions, 5047 flow. Second operand 6 states and 159 transitions. [2024-06-27 19:32:43,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 371 transitions, 6170 flow [2024-06-27 19:32:44,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 371 transitions, 6062 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 19:32:44,427 INFO L231 Difference]: Finished difference. Result has 253 places, 345 transitions, 5330 flow [2024-06-27 19:32:44,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4939, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5330, PETRI_PLACES=253, PETRI_TRANSITIONS=345} [2024-06-27 19:32:44,428 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 211 predicate places. [2024-06-27 19:32:44,428 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 345 transitions, 5330 flow [2024-06-27 19:32:44,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:44,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:44,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:44,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 19:32:44,428 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)] === [2024-06-27 19:32:44,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:44,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1708159316, now seen corresponding path program 8 times [2024-06-27 19:32:44,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:44,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761508932] [2024-06-27 19:32:44,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:44,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:44,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:44,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:44,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:44,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761508932] [2024-06-27 19:32:44,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761508932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:44,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:44,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:44,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032734882] [2024-06-27 19:32:44,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:44,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:44,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:44,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:44,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:44,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:44,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 345 transitions, 5330 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:44,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:44,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:44,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:45,149 INFO L124 PetriNetUnfolderBase]: 1957/3329 cut-off events. [2024-06-27 19:32:45,150 INFO L125 PetriNetUnfolderBase]: For 226279/226281 co-relation queries the response was YES. [2024-06-27 19:32:45,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23586 conditions, 3329 events. 1957/3329 cut-off events. For 226279/226281 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 20486 event pairs, 388 based on Foata normal form. 1/3327 useless extension candidates. Maximal degree in co-relation 23466. Up to 2867 conditions per place. [2024-06-27 19:32:45,177 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 290 selfloop transitions, 81 changer transitions 0/379 dead transitions. [2024-06-27 19:32:45,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 379 transitions, 6343 flow [2024-06-27 19:32:45,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:32:45,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:32:45,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-27 19:32:45,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 19:32:45,179 INFO L175 Difference]: Start difference. First operand has 253 places, 345 transitions, 5330 flow. Second operand 8 states and 205 transitions. [2024-06-27 19:32:45,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 379 transitions, 6343 flow [2024-06-27 19:32:45,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 379 transitions, 6212 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:45,769 INFO L231 Difference]: Finished difference. Result has 258 places, 346 transitions, 5411 flow [2024-06-27 19:32:45,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5199, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5411, PETRI_PLACES=258, PETRI_TRANSITIONS=346} [2024-06-27 19:32:45,770 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 216 predicate places. [2024-06-27 19:32:45,770 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 346 transitions, 5411 flow [2024-06-27 19:32:45,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:45,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:45,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:45,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 19:32:45,771 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)] === [2024-06-27 19:32:45,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:45,771 INFO L85 PathProgramCache]: Analyzing trace with hash 144696342, now seen corresponding path program 9 times [2024-06-27 19:32:45,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:45,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764657543] [2024-06-27 19:32:45,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:45,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:45,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:45,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:45,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:45,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764657543] [2024-06-27 19:32:45,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764657543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:45,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:45,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:45,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088574428] [2024-06-27 19:32:45,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:45,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:45,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:45,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:45,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:45,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:45,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 346 transitions, 5411 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:45,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:45,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:45,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:46,378 INFO L124 PetriNetUnfolderBase]: 1978/3358 cut-off events. [2024-06-27 19:32:46,379 INFO L125 PetriNetUnfolderBase]: For 237946/237946 co-relation queries the response was YES. [2024-06-27 19:32:46,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24087 conditions, 3358 events. 1978/3358 cut-off events. For 237946/237946 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 20590 event pairs, 399 based on Foata normal form. 1/3346 useless extension candidates. Maximal degree in co-relation 23966. Up to 2715 conditions per place. [2024-06-27 19:32:46,414 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 227 selfloop transitions, 147 changer transitions 0/382 dead transitions. [2024-06-27 19:32:46,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 382 transitions, 6694 flow [2024-06-27 19:32:46,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:46,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:46,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-27 19:32:46,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236933797909407 [2024-06-27 19:32:46,415 INFO L175 Difference]: Start difference. First operand has 258 places, 346 transitions, 5411 flow. Second operand 7 states and 179 transitions. [2024-06-27 19:32:46,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 382 transitions, 6694 flow [2024-06-27 19:32:47,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 382 transitions, 6461 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-27 19:32:47,012 INFO L231 Difference]: Finished difference. Result has 260 places, 356 transitions, 5804 flow [2024-06-27 19:32:47,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5184, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5804, PETRI_PLACES=260, PETRI_TRANSITIONS=356} [2024-06-27 19:32:47,012 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 218 predicate places. [2024-06-27 19:32:47,012 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 356 transitions, 5804 flow [2024-06-27 19:32:47,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:47,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:47,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:47,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 19:32:47,013 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)] === [2024-06-27 19:32:47,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:47,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1568028826, now seen corresponding path program 9 times [2024-06-27 19:32:47,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:47,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157886818] [2024-06-27 19:32:47,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:47,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:47,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:47,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:47,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:47,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157886818] [2024-06-27 19:32:47,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157886818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:47,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:47,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:47,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501979393] [2024-06-27 19:32:47,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:47,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:47,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:47,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:47,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:47,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:47,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 356 transitions, 5804 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:47,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:47,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:47,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:47,716 INFO L124 PetriNetUnfolderBase]: 1975/3357 cut-off events. [2024-06-27 19:32:47,716 INFO L125 PetriNetUnfolderBase]: For 239255/239255 co-relation queries the response was YES. [2024-06-27 19:32:47,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24791 conditions, 3357 events. 1975/3357 cut-off events. For 239255/239255 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 20670 event pairs, 392 based on Foata normal form. 1/3345 useless extension candidates. Maximal degree in co-relation 24668. Up to 2826 conditions per place. [2024-06-27 19:32:47,750 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 272 selfloop transitions, 99 changer transitions 0/379 dead transitions. [2024-06-27 19:32:47,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 379 transitions, 6758 flow [2024-06-27 19:32:47,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:47,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:47,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-27 19:32:47,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6300813008130082 [2024-06-27 19:32:47,752 INFO L175 Difference]: Start difference. First operand has 260 places, 356 transitions, 5804 flow. Second operand 6 states and 155 transitions. [2024-06-27 19:32:47,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 379 transitions, 6758 flow [2024-06-27 19:32:48,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 379 transitions, 6592 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 19:32:48,359 INFO L231 Difference]: Finished difference. Result has 262 places, 356 transitions, 5849 flow [2024-06-27 19:32:48,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5638, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5849, PETRI_PLACES=262, PETRI_TRANSITIONS=356} [2024-06-27 19:32:48,360 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 220 predicate places. [2024-06-27 19:32:48,360 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 356 transitions, 5849 flow [2024-06-27 19:32:48,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:48,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:48,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:48,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 19:32:48,361 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)] === [2024-06-27 19:32:48,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:48,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1568295736, now seen corresponding path program 10 times [2024-06-27 19:32:48,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:48,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361959258] [2024-06-27 19:32:48,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:48,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:48,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:48,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:48,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:48,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361959258] [2024-06-27 19:32:48,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361959258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:48,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:48,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:48,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644846079] [2024-06-27 19:32:48,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:48,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:48,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:48,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:48,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:48,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:48,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 356 transitions, 5849 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:48,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:48,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:48,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:49,042 INFO L124 PetriNetUnfolderBase]: 1972/3359 cut-off events. [2024-06-27 19:32:49,043 INFO L125 PetriNetUnfolderBase]: For 240575/240577 co-relation queries the response was YES. [2024-06-27 19:32:49,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24828 conditions, 3359 events. 1972/3359 cut-off events. For 240575/240577 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 20697 event pairs, 378 based on Foata normal form. 1/3358 useless extension candidates. Maximal degree in co-relation 24703. Up to 2823 conditions per place. [2024-06-27 19:32:49,078 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 275 selfloop transitions, 101 changer transitions 0/384 dead transitions. [2024-06-27 19:32:49,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 384 transitions, 6695 flow [2024-06-27 19:32:49,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:49,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:49,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-27 19:32:49,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236933797909407 [2024-06-27 19:32:49,079 INFO L175 Difference]: Start difference. First operand has 262 places, 356 transitions, 5849 flow. Second operand 7 states and 179 transitions. [2024-06-27 19:32:49,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 384 transitions, 6695 flow [2024-06-27 19:32:49,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 384 transitions, 6465 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 19:32:49,731 INFO L231 Difference]: Finished difference. Result has 263 places, 356 transitions, 5863 flow [2024-06-27 19:32:49,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5619, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5863, PETRI_PLACES=263, PETRI_TRANSITIONS=356} [2024-06-27 19:32:49,732 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 221 predicate places. [2024-06-27 19:32:49,732 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 356 transitions, 5863 flow [2024-06-27 19:32:49,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:49,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:49,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:49,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 19:32:49,733 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)] === [2024-06-27 19:32:49,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:49,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1694106086, now seen corresponding path program 10 times [2024-06-27 19:32:49,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:49,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567309185] [2024-06-27 19:32:49,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:49,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:49,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:49,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:49,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:49,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567309185] [2024-06-27 19:32:49,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567309185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:49,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:49,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:49,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227213159] [2024-06-27 19:32:49,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:49,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:49,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:49,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:49,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:49,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:49,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 356 transitions, 5863 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:49,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:49,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:49,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:50,370 INFO L124 PetriNetUnfolderBase]: 1982/3372 cut-off events. [2024-06-27 19:32:50,370 INFO L125 PetriNetUnfolderBase]: For 242695/242697 co-relation queries the response was YES. [2024-06-27 19:32:50,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25059 conditions, 3372 events. 1982/3372 cut-off events. For 242695/242697 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 20814 event pairs, 374 based on Foata normal form. 2/3372 useless extension candidates. Maximal degree in co-relation 24934. Up to 2719 conditions per place. [2024-06-27 19:32:50,404 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 232 selfloop transitions, 154 changer transitions 0/394 dead transitions. [2024-06-27 19:32:50,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 394 transitions, 7165 flow [2024-06-27 19:32:50,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:32:50,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:32:50,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-27 19:32:50,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6280487804878049 [2024-06-27 19:32:50,405 INFO L175 Difference]: Start difference. First operand has 263 places, 356 transitions, 5863 flow. Second operand 8 states and 206 transitions. [2024-06-27 19:32:50,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 394 transitions, 7165 flow [2024-06-27 19:32:51,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 394 transitions, 6890 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-27 19:32:51,077 INFO L231 Difference]: Finished difference. Result has 262 places, 362 transitions, 6067 flow [2024-06-27 19:32:51,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5600, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6067, PETRI_PLACES=262, PETRI_TRANSITIONS=362} [2024-06-27 19:32:51,077 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 220 predicate places. [2024-06-27 19:32:51,077 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 362 transitions, 6067 flow [2024-06-27 19:32:51,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:51,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:51,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:51,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 19:32:51,078 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:51,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:51,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1774711840, now seen corresponding path program 11 times [2024-06-27 19:32:51,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:51,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143121805] [2024-06-27 19:32:51,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:51,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:51,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:51,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:51,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:51,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143121805] [2024-06-27 19:32:51,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143121805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:51,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:51,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:51,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912860073] [2024-06-27 19:32:51,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:51,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:51,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:51,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:51,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:51,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:32:51,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 362 transitions, 6067 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:51,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:51,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:32:51,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:51,769 INFO L124 PetriNetUnfolderBase]: 1992/3390 cut-off events. [2024-06-27 19:32:51,769 INFO L125 PetriNetUnfolderBase]: For 230105/230107 co-relation queries the response was YES. [2024-06-27 19:32:51,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25054 conditions, 3390 events. 1992/3390 cut-off events. For 230105/230107 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 20912 event pairs, 379 based on Foata normal form. 2/3390 useless extension candidates. Maximal degree in co-relation 24931. Up to 2730 conditions per place. [2024-06-27 19:32:51,804 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 233 selfloop transitions, 156 changer transitions 0/397 dead transitions. [2024-06-27 19:32:51,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 397 transitions, 7329 flow [2024-06-27 19:32:51,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:32:51,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:32:51,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-27 19:32:51,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-27 19:32:51,805 INFO L175 Difference]: Start difference. First operand has 262 places, 362 transitions, 6067 flow. Second operand 9 states and 222 transitions. [2024-06-27 19:32:51,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 397 transitions, 7329 flow [2024-06-27 19:32:52,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 397 transitions, 6954 flow, removed 64 selfloop flow, removed 6 redundant places. [2024-06-27 19:32:52,459 INFO L231 Difference]: Finished difference. Result has 265 places, 368 transitions, 6145 flow [2024-06-27 19:32:52,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5712, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6145, PETRI_PLACES=265, PETRI_TRANSITIONS=368} [2024-06-27 19:32:52,459 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 223 predicate places. [2024-06-27 19:32:52,459 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 368 transitions, 6145 flow [2024-06-27 19:32:52,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:52,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:52,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:52,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 19:32:52,460 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:52,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:52,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1346606242, now seen corresponding path program 2 times [2024-06-27 19:32:52,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:52,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492464553] [2024-06-27 19:32:52,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:52,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:52,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:52,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:52,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:52,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492464553] [2024-06-27 19:32:52,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492464553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:52,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:52,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:52,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532595762] [2024-06-27 19:32:52,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:52,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:52,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:52,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:52,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:52,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-27 19:32:52,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 368 transitions, 6145 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) [2024-06-27 19:32:52,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:52,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-27 19:32:52,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:53,108 INFO L124 PetriNetUnfolderBase]: 1929/3327 cut-off events. [2024-06-27 19:32:53,109 INFO L125 PetriNetUnfolderBase]: For 246453/246455 co-relation queries the response was YES. [2024-06-27 19:32:53,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24556 conditions, 3327 events. 1929/3327 cut-off events. For 246453/246455 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 20797 event pairs, 283 based on Foata normal form. 9/3311 useless extension candidates. Maximal degree in co-relation 24433. Up to 2713 conditions per place. [2024-06-27 19:32:53,140 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 303 selfloop transitions, 32 changer transitions 0/391 dead transitions. [2024-06-27 19:32:53,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 391 transitions, 6919 flow [2024-06-27 19:32:53,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:32:53,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:32:53,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2024-06-27 19:32:53,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6682926829268293 [2024-06-27 19:32:53,141 INFO L175 Difference]: Start difference. First operand has 265 places, 368 transitions, 6145 flow. Second operand 5 states and 137 transitions. [2024-06-27 19:32:53,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 391 transitions, 6919 flow [2024-06-27 19:32:53,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 391 transitions, 6667 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-27 19:32:53,797 INFO L231 Difference]: Finished difference. Result has 264 places, 369 transitions, 5987 flow [2024-06-27 19:32:53,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5893, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5987, PETRI_PLACES=264, PETRI_TRANSITIONS=369} [2024-06-27 19:32:53,798 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 222 predicate places. [2024-06-27 19:32:53,798 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 369 transitions, 5987 flow [2024-06-27 19:32:53,798 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) [2024-06-27 19:32:53,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:53,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:53,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 19:32:53,798 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:53,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:53,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1331369122, now seen corresponding path program 3 times [2024-06-27 19:32:53,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:53,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855787007] [2024-06-27 19:32:53,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:53,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:53,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:53,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:53,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:53,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855787007] [2024-06-27 19:32:53,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855787007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:53,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:53,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:53,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97494661] [2024-06-27 19:32:53,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:53,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:53,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:53,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:53,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:53,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-27 19:32:53,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 369 transitions, 5987 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) [2024-06-27 19:32:53,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:53,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-27 19:32:53,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:54,506 INFO L124 PetriNetUnfolderBase]: 1955/3369 cut-off events. [2024-06-27 19:32:54,506 INFO L125 PetriNetUnfolderBase]: For 243371/243373 co-relation queries the response was YES. [2024-06-27 19:32:54,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24556 conditions, 3369 events. 1955/3369 cut-off events. For 243371/243373 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 21087 event pairs, 279 based on Foata normal form. 8/3352 useless extension candidates. Maximal degree in co-relation 24433. Up to 2723 conditions per place. [2024-06-27 19:32:54,536 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 305 selfloop transitions, 35 changer transitions 0/396 dead transitions. [2024-06-27 19:32:54,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 396 transitions, 6793 flow [2024-06-27 19:32:54,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:54,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:54,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-27 19:32:54,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2024-06-27 19:32:54,537 INFO L175 Difference]: Start difference. First operand has 264 places, 369 transitions, 5987 flow. Second operand 6 states and 159 transitions. [2024-06-27 19:32:54,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 396 transitions, 6793 flow [2024-06-27 19:32:55,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 396 transitions, 6737 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:55,072 INFO L231 Difference]: Finished difference. Result has 267 places, 370 transitions, 6023 flow [2024-06-27 19:32:55,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5931, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6023, PETRI_PLACES=267, PETRI_TRANSITIONS=370} [2024-06-27 19:32:55,072 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 225 predicate places. [2024-06-27 19:32:55,072 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 370 transitions, 6023 flow [2024-06-27 19:32:55,073 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) [2024-06-27 19:32:55,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:55,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:55,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 19:32:55,073 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:55,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:55,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1774702912, now seen corresponding path program 4 times [2024-06-27 19:32:55,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:55,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750208445] [2024-06-27 19:32:55,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:55,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:55,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:55,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:55,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:55,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750208445] [2024-06-27 19:32:55,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750208445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:55,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:55,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:55,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386832281] [2024-06-27 19:32:55,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:55,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:55,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:55,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:55,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:55,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-27 19:32:55,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 370 transitions, 6023 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) [2024-06-27 19:32:55,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:55,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-27 19:32:55,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:55,666 INFO L124 PetriNetUnfolderBase]: 1965/3387 cut-off events. [2024-06-27 19:32:55,666 INFO L125 PetriNetUnfolderBase]: For 246169/246171 co-relation queries the response was YES. [2024-06-27 19:32:55,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24539 conditions, 3387 events. 1965/3387 cut-off events. For 246169/246171 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 21208 event pairs, 372 based on Foata normal form. 10/3372 useless extension candidates. Maximal degree in co-relation 24415. Up to 2772 conditions per place. [2024-06-27 19:32:55,700 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 296 selfloop transitions, 39 changer transitions 0/391 dead transitions. [2024-06-27 19:32:55,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 391 transitions, 6793 flow [2024-06-27 19:32:55,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:55,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:55,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-27 19:32:55,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-27 19:32:55,701 INFO L175 Difference]: Start difference. First operand has 267 places, 370 transitions, 6023 flow. Second operand 6 states and 152 transitions. [2024-06-27 19:32:55,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 391 transitions, 6793 flow [2024-06-27 19:32:56,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 391 transitions, 6715 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 19:32:56,391 INFO L231 Difference]: Finished difference. Result has 269 places, 371 transitions, 6053 flow [2024-06-27 19:32:56,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5945, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6053, PETRI_PLACES=269, PETRI_TRANSITIONS=371} [2024-06-27 19:32:56,392 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 227 predicate places. [2024-06-27 19:32:56,392 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 371 transitions, 6053 flow [2024-06-27 19:32:56,392 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) [2024-06-27 19:32:56,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:56,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:56,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 19:32:56,393 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:56,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:56,393 INFO L85 PathProgramCache]: Analyzing trace with hash -117245622, now seen corresponding path program 1 times [2024-06-27 19:32:56,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:56,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354820725] [2024-06-27 19:32:56,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:56,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:56,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:56,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:56,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:56,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354820725] [2024-06-27 19:32:56,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354820725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:56,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:56,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:56,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170167032] [2024-06-27 19:32:56,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:56,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:56,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:56,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:56,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:56,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-27 19:32:56,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 371 transitions, 6053 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) [2024-06-27 19:32:56,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:56,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-27 19:32:56,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:57,009 INFO L124 PetriNetUnfolderBase]: 2030/3522 cut-off events. [2024-06-27 19:32:57,010 INFO L125 PetriNetUnfolderBase]: For 266165/266181 co-relation queries the response was YES. [2024-06-27 19:32:57,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25597 conditions, 3522 events. 2030/3522 cut-off events. For 266165/266181 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 22517 event pairs, 381 based on Foata normal form. 12/3525 useless extension candidates. Maximal degree in co-relation 25472. Up to 2908 conditions per place. [2024-06-27 19:32:57,046 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 314 selfloop transitions, 38 changer transitions 0/397 dead transitions. [2024-06-27 19:32:57,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 397 transitions, 7009 flow [2024-06-27 19:32:57,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:57,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:57,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-27 19:32:57,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260162601626016 [2024-06-27 19:32:57,047 INFO L175 Difference]: Start difference. First operand has 269 places, 371 transitions, 6053 flow. Second operand 6 states and 154 transitions. [2024-06-27 19:32:57,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 397 transitions, 7009 flow [2024-06-27 19:32:57,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 397 transitions, 6925 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 19:32:57,758 INFO L231 Difference]: Finished difference. Result has 271 places, 373 transitions, 6073 flow [2024-06-27 19:32:57,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5971, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6073, PETRI_PLACES=271, PETRI_TRANSITIONS=373} [2024-06-27 19:32:57,759 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 229 predicate places. [2024-06-27 19:32:57,759 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 373 transitions, 6073 flow [2024-06-27 19:32:57,759 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) [2024-06-27 19:32:57,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:57,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:57,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 19:32:57,760 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)] === [2024-06-27 19:32:57,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:57,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1922731878, now seen corresponding path program 2 times [2024-06-27 19:32:57,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:57,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286524304] [2024-06-27 19:32:57,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:57,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:57,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:57,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:57,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:57,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286524304] [2024-06-27 19:32:57,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286524304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:57,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:57,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:57,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862170631] [2024-06-27 19:32:57,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:57,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:57,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:57,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:57,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:57,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-27 19:32:57,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 373 transitions, 6073 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) [2024-06-27 19:32:57,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:57,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-27 19:32:57,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:58,366 INFO L124 PetriNetUnfolderBase]: 2064/3571 cut-off events. [2024-06-27 19:32:58,367 INFO L125 PetriNetUnfolderBase]: For 270340/270356 co-relation queries the response was YES. [2024-06-27 19:32:58,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25794 conditions, 3571 events. 2064/3571 cut-off events. For 270340/270356 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 22846 event pairs, 411 based on Foata normal form. 14/3576 useless extension candidates. Maximal degree in co-relation 25668. Up to 3035 conditions per place. [2024-06-27 19:32:58,402 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 310 selfloop transitions, 36 changer transitions 0/391 dead transitions. [2024-06-27 19:32:58,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 391 transitions, 6845 flow [2024-06-27 19:32:58,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:58,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:58,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-27 19:32:58,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-27 19:32:58,403 INFO L175 Difference]: Start difference. First operand has 271 places, 373 transitions, 6073 flow. Second operand 6 states and 148 transitions. [2024-06-27 19:32:58,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 391 transitions, 6845 flow [2024-06-27 19:32:59,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 391 transitions, 6802 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 19:32:59,051 INFO L231 Difference]: Finished difference. Result has 275 places, 374 transitions, 6122 flow [2024-06-27 19:32:59,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6030, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6122, PETRI_PLACES=275, PETRI_TRANSITIONS=374} [2024-06-27 19:32:59,052 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 233 predicate places. [2024-06-27 19:32:59,052 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 374 transitions, 6122 flow [2024-06-27 19:32:59,052 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) [2024-06-27 19:32:59,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:59,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:59,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 19:32:59,053 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:59,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:59,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1671903398, now seen corresponding path program 3 times [2024-06-27 19:32:59,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:59,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396911263] [2024-06-27 19:32:59,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:59,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:59,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:59,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:59,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:59,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396911263] [2024-06-27 19:32:59,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396911263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:59,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:59,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:59,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244370891] [2024-06-27 19:32:59,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:59,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:59,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:59,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:59,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:59,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-27 19:32:59,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 374 transitions, 6122 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) [2024-06-27 19:32:59,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:59,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-27 19:32:59,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:59,723 INFO L124 PetriNetUnfolderBase]: 2097/3619 cut-off events. [2024-06-27 19:32:59,723 INFO L125 PetriNetUnfolderBase]: For 277553/277563 co-relation queries the response was YES. [2024-06-27 19:32:59,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26280 conditions, 3619 events. 2097/3619 cut-off events. For 277553/277563 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 23092 event pairs, 415 based on Foata normal form. 10/3618 useless extension candidates. Maximal degree in co-relation 26152. Up to 3087 conditions per place. [2024-06-27 19:32:59,761 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 309 selfloop transitions, 39 changer transitions 0/393 dead transitions. [2024-06-27 19:32:59,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 393 transitions, 6902 flow [2024-06-27 19:32:59,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:59,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:59,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-27 19:32:59,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-27 19:32:59,763 INFO L175 Difference]: Start difference. First operand has 275 places, 374 transitions, 6122 flow. Second operand 7 states and 168 transitions. [2024-06-27 19:32:59,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 393 transitions, 6902 flow [2024-06-27 19:33:00,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 393 transitions, 6830 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 19:33:00,320 INFO L231 Difference]: Finished difference. Result has 278 places, 375 transitions, 6150 flow [2024-06-27 19:33:00,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6050, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6150, PETRI_PLACES=278, PETRI_TRANSITIONS=375} [2024-06-27 19:33:00,320 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 236 predicate places. [2024-06-27 19:33:00,320 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 375 transitions, 6150 flow [2024-06-27 19:33:00,321 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) [2024-06-27 19:33:00,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:00,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:00,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 19:33:00,321 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)] === [2024-06-27 19:33:00,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:00,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1087206, now seen corresponding path program 1 times [2024-06-27 19:33:00,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:00,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141254026] [2024-06-27 19:33:00,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:00,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:00,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:00,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:00,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:00,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141254026] [2024-06-27 19:33:00,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141254026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:00,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:00,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:33:00,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039485225] [2024-06-27 19:33:00,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:00,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:33:00,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:00,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:33:00,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:33:00,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:00,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 375 transitions, 6150 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:00,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:00,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:00,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:01,003 INFO L124 PetriNetUnfolderBase]: 2207/3734 cut-off events. [2024-06-27 19:33:01,003 INFO L125 PetriNetUnfolderBase]: For 266267/266277 co-relation queries the response was YES. [2024-06-27 19:33:01,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27106 conditions, 3734 events. 2207/3734 cut-off events. For 266267/266277 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 23365 event pairs, 439 based on Foata normal form. 2/3730 useless extension candidates. Maximal degree in co-relation 26977. Up to 3351 conditions per place. [2024-06-27 19:33:01,038 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 343 selfloop transitions, 41 changer transitions 0/392 dead transitions. [2024-06-27 19:33:01,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 392 transitions, 7006 flow [2024-06-27 19:33:01,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:33:01,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:33:01,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-27 19:33:01,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5644599303135889 [2024-06-27 19:33:01,039 INFO L175 Difference]: Start difference. First operand has 278 places, 375 transitions, 6150 flow. Second operand 7 states and 162 transitions. [2024-06-27 19:33:01,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 392 transitions, 7006 flow [2024-06-27 19:33:01,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 392 transitions, 6926 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 19:33:01,698 INFO L231 Difference]: Finished difference. Result has 280 places, 377 transitions, 6207 flow [2024-06-27 19:33:01,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6070, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6207, PETRI_PLACES=280, PETRI_TRANSITIONS=377} [2024-06-27 19:33:01,699 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 238 predicate places. [2024-06-27 19:33:01,699 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 377 transitions, 6207 flow [2024-06-27 19:33:01,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:01,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:01,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:01,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 19:33:01,700 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:01,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:01,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1568018906, now seen corresponding path program 4 times [2024-06-27 19:33:01,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:01,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522337837] [2024-06-27 19:33:01,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:01,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:01,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:01,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:01,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:01,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522337837] [2024-06-27 19:33:01,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522337837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:01,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:01,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:33:01,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824532052] [2024-06-27 19:33:01,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:01,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:33:01,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:01,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:33:01,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:33:01,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-27 19:33:01,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 377 transitions, 6207 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) [2024-06-27 19:33:01,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:01,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-27 19:33:01,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:02,353 INFO L124 PetriNetUnfolderBase]: 2082/3609 cut-off events. [2024-06-27 19:33:02,353 INFO L125 PetriNetUnfolderBase]: For 267144/267154 co-relation queries the response was YES. [2024-06-27 19:33:02,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25759 conditions, 3609 events. 2082/3609 cut-off events. For 267144/267154 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 23123 event pairs, 371 based on Foata normal form. 10/3614 useless extension candidates. Maximal degree in co-relation 25629. Up to 3061 conditions per place. [2024-06-27 19:33:02,390 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 328 selfloop transitions, 27 changer transitions 0/400 dead transitions. [2024-06-27 19:33:02,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 400 transitions, 7005 flow [2024-06-27 19:33:02,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:33:02,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:33:02,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-27 19:33:02,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6300813008130082 [2024-06-27 19:33:02,391 INFO L175 Difference]: Start difference. First operand has 280 places, 377 transitions, 6207 flow. Second operand 6 states and 155 transitions. [2024-06-27 19:33:02,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 400 transitions, 7005 flow [2024-06-27 19:33:03,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 400 transitions, 6882 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 19:33:03,091 INFO L231 Difference]: Finished difference. Result has 281 places, 377 transitions, 6147 flow [2024-06-27 19:33:03,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6084, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6147, PETRI_PLACES=281, PETRI_TRANSITIONS=377} [2024-06-27 19:33:03,092 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 239 predicate places. [2024-06-27 19:33:03,092 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 377 transitions, 6147 flow [2024-06-27 19:33:03,092 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) [2024-06-27 19:33:03,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:03,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:03,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 19:33:03,092 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:03,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:03,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1561578098, now seen corresponding path program 2 times [2024-06-27 19:33:03,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:03,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567634987] [2024-06-27 19:33:03,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:03,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:03,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:03,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:03,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:03,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567634987] [2024-06-27 19:33:03,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567634987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:03,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:03,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:33:03,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106321814] [2024-06-27 19:33:03,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:03,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:33:03,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:03,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:33:03,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:33:03,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:03,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 377 transitions, 6147 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:03,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:03,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:03,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:03,816 INFO L124 PetriNetUnfolderBase]: 2192/3720 cut-off events. [2024-06-27 19:33:03,817 INFO L125 PetriNetUnfolderBase]: For 254342/254352 co-relation queries the response was YES. [2024-06-27 19:33:03,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26483 conditions, 3720 events. 2192/3720 cut-off events. For 254342/254352 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 23277 event pairs, 424 based on Foata normal form. 2/3720 useless extension candidates. Maximal degree in co-relation 26352. Up to 3350 conditions per place. [2024-06-27 19:33:03,848 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 362 selfloop transitions, 26 changer transitions 0/396 dead transitions. [2024-06-27 19:33:03,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 396 transitions, 7023 flow [2024-06-27 19:33:03,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:33:03,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:33:03,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-27 19:33:03,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-27 19:33:03,849 INFO L175 Difference]: Start difference. First operand has 281 places, 377 transitions, 6147 flow. Second operand 6 states and 147 transitions. [2024-06-27 19:33:03,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 396 transitions, 7023 flow [2024-06-27 19:33:04,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 396 transitions, 6957 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 19:33:04,529 INFO L231 Difference]: Finished difference. Result has 282 places, 379 transitions, 6192 flow [2024-06-27 19:33:04,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6081, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6192, PETRI_PLACES=282, PETRI_TRANSITIONS=379} [2024-06-27 19:33:04,530 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 240 predicate places. [2024-06-27 19:33:04,530 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 379 transitions, 6192 flow [2024-06-27 19:33:04,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:04,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:04,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:04,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 19:33:04,530 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:04,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:04,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1331362178, now seen corresponding path program 3 times [2024-06-27 19:33:04,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:04,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216544188] [2024-06-27 19:33:04,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:04,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:04,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:04,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:04,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:04,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216544188] [2024-06-27 19:33:04,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216544188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:04,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:04,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:33:04,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005441093] [2024-06-27 19:33:04,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:04,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:33:04,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:04,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:33:04,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:33:04,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:04,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 379 transitions, 6192 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:04,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:04,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:04,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:05,242 INFO L124 PetriNetUnfolderBase]: 2220/3771 cut-off events. [2024-06-27 19:33:05,242 INFO L125 PetriNetUnfolderBase]: For 269873/269883 co-relation queries the response was YES. [2024-06-27 19:33:05,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27057 conditions, 3771 events. 2220/3771 cut-off events. For 269873/269883 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 23650 event pairs, 398 based on Foata normal form. 2/3771 useless extension candidates. Maximal degree in co-relation 26925. Up to 3279 conditions per place. [2024-06-27 19:33:05,279 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 367 selfloop transitions, 30 changer transitions 0/405 dead transitions. [2024-06-27 19:33:05,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 405 transitions, 7292 flow [2024-06-27 19:33:05,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:33:05,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:33:05,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-27 19:33:05,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-27 19:33:05,280 INFO L175 Difference]: Start difference. First operand has 282 places, 379 transitions, 6192 flow. Second operand 6 states and 153 transitions. [2024-06-27 19:33:05,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 405 transitions, 7292 flow [2024-06-27 19:33:05,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 405 transitions, 7197 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-27 19:33:05,878 INFO L231 Difference]: Finished difference. Result has 284 places, 382 transitions, 6236 flow [2024-06-27 19:33:05,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6097, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6236, PETRI_PLACES=284, PETRI_TRANSITIONS=382} [2024-06-27 19:33:05,879 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 242 predicate places. [2024-06-27 19:33:05,879 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 382 transitions, 6236 flow [2024-06-27 19:33:05,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:05,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:05,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:05,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 19:33:05,880 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:05,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:05,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1597816188, now seen corresponding path program 1 times [2024-06-27 19:33:05,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:05,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606184171] [2024-06-27 19:33:05,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:05,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:05,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:05,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:05,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:05,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606184171] [2024-06-27 19:33:05,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606184171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:05,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:05,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:33:05,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067636361] [2024-06-27 19:33:05,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:05,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:33:05,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:05,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:33:05,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:33:05,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:06,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 382 transitions, 6236 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:06,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:06,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:06,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:06,670 INFO L124 PetriNetUnfolderBase]: 2233/3785 cut-off events. [2024-06-27 19:33:06,670 INFO L125 PetriNetUnfolderBase]: For 276258/276258 co-relation queries the response was YES. [2024-06-27 19:33:06,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27385 conditions, 3785 events. 2233/3785 cut-off events. For 276258/276258 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 23713 event pairs, 416 based on Foata normal form. 1/3784 useless extension candidates. Maximal degree in co-relation 27252. Up to 3326 conditions per place. [2024-06-27 19:33:06,702 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 360 selfloop transitions, 54 changer transitions 0/422 dead transitions. [2024-06-27 19:33:06,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 422 transitions, 7426 flow [2024-06-27 19:33:06,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:33:06,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:33:06,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-27 19:33:06,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-27 19:33:06,703 INFO L175 Difference]: Start difference. First operand has 284 places, 382 transitions, 6236 flow. Second operand 8 states and 197 transitions. [2024-06-27 19:33:06,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 422 transitions, 7426 flow [2024-06-27 19:33:07,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 422 transitions, 7352 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-06-27 19:33:07,575 INFO L231 Difference]: Finished difference. Result has 291 places, 388 transitions, 6405 flow [2024-06-27 19:33:07,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6162, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6405, PETRI_PLACES=291, PETRI_TRANSITIONS=388} [2024-06-27 19:33:07,576 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 249 predicate places. [2024-06-27 19:33:07,576 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 388 transitions, 6405 flow [2024-06-27 19:33:07,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:07,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:07,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:07,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 19:33:07,577 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:07,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:07,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1592752892, now seen corresponding path program 2 times [2024-06-27 19:33:07,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:07,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145242459] [2024-06-27 19:33:07,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:07,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:07,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:07,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:07,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:07,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145242459] [2024-06-27 19:33:07,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145242459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:07,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:07,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:33:07,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415177677] [2024-06-27 19:33:07,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:07,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:33:07,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:07,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:33:07,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:33:07,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:07,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 388 transitions, 6405 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:07,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:07,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:07,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:08,231 INFO L124 PetriNetUnfolderBase]: 2246/3802 cut-off events. [2024-06-27 19:33:08,231 INFO L125 PetriNetUnfolderBase]: For 291080/291096 co-relation queries the response was YES. [2024-06-27 19:33:08,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28270 conditions, 3802 events. 2246/3802 cut-off events. For 291080/291096 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 23839 event pairs, 436 based on Foata normal form. 2/3798 useless extension candidates. Maximal degree in co-relation 28134. Up to 3007 conditions per place. [2024-06-27 19:33:08,271 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 273 selfloop transitions, 142 changer transitions 0/423 dead transitions. [2024-06-27 19:33:08,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 423 transitions, 7833 flow [2024-06-27 19:33:08,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:33:08,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:33:08,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-27 19:33:08,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-27 19:33:08,273 INFO L175 Difference]: Start difference. First operand has 291 places, 388 transitions, 6405 flow. Second operand 7 states and 178 transitions. [2024-06-27 19:33:08,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 423 transitions, 7833 flow [2024-06-27 19:33:08,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 423 transitions, 7733 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-27 19:33:08,871 INFO L231 Difference]: Finished difference. Result has 297 places, 397 transitions, 6909 flow [2024-06-27 19:33:08,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6305, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6909, PETRI_PLACES=297, PETRI_TRANSITIONS=397} [2024-06-27 19:33:08,872 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 255 predicate places. [2024-06-27 19:33:08,872 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 397 transitions, 6909 flow [2024-06-27 19:33:08,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:08,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:08,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:08,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 19:33:08,873 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:08,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:08,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1628761908, now seen corresponding path program 3 times [2024-06-27 19:33:08,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:08,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866022045] [2024-06-27 19:33:08,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:08,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:08,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:08,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:08,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:08,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866022045] [2024-06-27 19:33:08,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866022045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:08,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:08,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:33:08,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931874222] [2024-06-27 19:33:08,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:08,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:33:08,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:08,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:33:08,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:33:08,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:08,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 397 transitions, 6909 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:08,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:08,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:08,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:09,656 INFO L124 PetriNetUnfolderBase]: 2251/3809 cut-off events. [2024-06-27 19:33:09,656 INFO L125 PetriNetUnfolderBase]: For 303706/303722 co-relation queries the response was YES. [2024-06-27 19:33:09,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29532 conditions, 3809 events. 2251/3809 cut-off events. For 303706/303722 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 23844 event pairs, 436 based on Foata normal form. 2/3805 useless extension candidates. Maximal degree in co-relation 29392. Up to 3011 conditions per place. [2024-06-27 19:33:09,696 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 270 selfloop transitions, 145 changer transitions 0/423 dead transitions. [2024-06-27 19:33:09,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 423 transitions, 8231 flow [2024-06-27 19:33:09,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:33:09,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:33:09,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 19:33:09,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 19:33:09,698 INFO L175 Difference]: Start difference. First operand has 297 places, 397 transitions, 6909 flow. Second operand 7 states and 175 transitions. [2024-06-27 19:33:09,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 423 transitions, 8231 flow [2024-06-27 19:33:10,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 423 transitions, 8055 flow, removed 62 selfloop flow, removed 2 redundant places. [2024-06-27 19:33:10,467 INFO L231 Difference]: Finished difference. Result has 302 places, 400 transitions, 7109 flow [2024-06-27 19:33:10,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6759, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7109, PETRI_PLACES=302, PETRI_TRANSITIONS=400} [2024-06-27 19:33:10,467 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 260 predicate places. [2024-06-27 19:33:10,467 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 400 transitions, 7109 flow [2024-06-27 19:33:10,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:10,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:10,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:10,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 19:33:10,468 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:10,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:10,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1470095564, now seen corresponding path program 4 times [2024-06-27 19:33:10,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:10,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44549490] [2024-06-27 19:33:10,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:10,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:10,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:10,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:10,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:10,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44549490] [2024-06-27 19:33:10,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44549490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:10,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:10,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:33:10,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861177736] [2024-06-27 19:33:10,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:10,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:33:10,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:10,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:33:10,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:33:10,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:10,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 400 transitions, 7109 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:10,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:10,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:10,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:11,249 INFO L124 PetriNetUnfolderBase]: 2264/3836 cut-off events. [2024-06-27 19:33:11,249 INFO L125 PetriNetUnfolderBase]: For 309801/309803 co-relation queries the response was YES. [2024-06-27 19:33:11,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29819 conditions, 3836 events. 2264/3836 cut-off events. For 309801/309803 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 24089 event pairs, 417 based on Foata normal form. 1/3835 useless extension candidates. Maximal degree in co-relation 29677. Up to 3413 conditions per place. [2024-06-27 19:33:11,291 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 376 selfloop transitions, 41 changer transitions 0/425 dead transitions. [2024-06-27 19:33:11,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 425 transitions, 8266 flow [2024-06-27 19:33:11,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:33:11,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:33:11,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-27 19:33:11,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-27 19:33:11,292 INFO L175 Difference]: Start difference. First operand has 302 places, 400 transitions, 7109 flow. Second operand 8 states and 186 transitions. [2024-06-27 19:33:11,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 425 transitions, 8266 flow [2024-06-27 19:33:12,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 425 transitions, 7968 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-27 19:33:12,394 INFO L231 Difference]: Finished difference. Result has 307 places, 406 transitions, 7037 flow [2024-06-27 19:33:12,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6820, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7037, PETRI_PLACES=307, PETRI_TRANSITIONS=406} [2024-06-27 19:33:12,395 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 265 predicate places. [2024-06-27 19:33:12,395 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 406 transitions, 7037 flow [2024-06-27 19:33:12,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:12,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:12,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:12,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 19:33:12,395 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:12,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:12,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1420350209, now seen corresponding path program 1 times [2024-06-27 19:33:12,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:12,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797154088] [2024-06-27 19:33:12,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:12,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:12,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:12,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:12,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:12,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797154088] [2024-06-27 19:33:12,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797154088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:12,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:12,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:33:12,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587570935] [2024-06-27 19:33:12,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:12,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:33:12,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:12,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:33:12,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:33:12,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:12,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 406 transitions, 7037 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:12,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:12,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:12,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:13,127 INFO L124 PetriNetUnfolderBase]: 2293/3889 cut-off events. [2024-06-27 19:33:13,127 INFO L125 PetriNetUnfolderBase]: For 327556/327562 co-relation queries the response was YES. [2024-06-27 19:33:13,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30201 conditions, 3889 events. 2293/3889 cut-off events. For 327556/327562 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 24525 event pairs, 448 based on Foata normal form. 2/3887 useless extension candidates. Maximal degree in co-relation 30057. Up to 3220 conditions per place. [2024-06-27 19:33:13,170 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 287 selfloop transitions, 147 changer transitions 0/442 dead transitions. [2024-06-27 19:33:13,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 442 transitions, 8501 flow [2024-06-27 19:33:13,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:33:13,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:33:13,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 19:33:13,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 19:33:13,171 INFO L175 Difference]: Start difference. First operand has 307 places, 406 transitions, 7037 flow. Second operand 7 states and 175 transitions. [2024-06-27 19:33:13,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 442 transitions, 8501 flow [2024-06-27 19:33:14,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 442 transitions, 8384 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 19:33:14,353 INFO L231 Difference]: Finished difference. Result has 309 places, 418 transitions, 7430 flow [2024-06-27 19:33:14,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6920, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7430, PETRI_PLACES=309, PETRI_TRANSITIONS=418} [2024-06-27 19:33:14,354 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 267 predicate places. [2024-06-27 19:33:14,354 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 418 transitions, 7430 flow [2024-06-27 19:33:14,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:14,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:14,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:14,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 19:33:14,354 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:14,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:14,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1628769007, now seen corresponding path program 2 times [2024-06-27 19:33:14,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:14,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844958614] [2024-06-27 19:33:14,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:14,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:14,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:14,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:14,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:14,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844958614] [2024-06-27 19:33:14,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844958614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:14,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:14,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:14,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982169155] [2024-06-27 19:33:14,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:14,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:14,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:14,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:14,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:14,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:14,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 418 transitions, 7430 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:14,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:14,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:14,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:15,112 INFO L124 PetriNetUnfolderBase]: 2306/3904 cut-off events. [2024-06-27 19:33:15,113 INFO L125 PetriNetUnfolderBase]: For 339236/339244 co-relation queries the response was YES. [2024-06-27 19:33:15,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30773 conditions, 3904 events. 2306/3904 cut-off events. For 339236/339244 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 24630 event pairs, 445 based on Foata normal form. 2/3901 useless extension candidates. Maximal degree in co-relation 30628. Up to 3235 conditions per place. [2024-06-27 19:33:15,156 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 293 selfloop transitions, 148 changer transitions 0/449 dead transitions. [2024-06-27 19:33:15,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 449 transitions, 8818 flow [2024-06-27 19:33:15,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:33:15,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:33:15,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-27 19:33:15,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-27 19:33:15,158 INFO L175 Difference]: Start difference. First operand has 309 places, 418 transitions, 7430 flow. Second operand 8 states and 196 transitions. [2024-06-27 19:33:15,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 449 transitions, 8818 flow [2024-06-27 19:33:16,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 449 transitions, 8628 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-27 19:33:16,159 INFO L231 Difference]: Finished difference. Result has 314 places, 424 transitions, 7656 flow [2024-06-27 19:33:16,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7250, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7656, PETRI_PLACES=314, PETRI_TRANSITIONS=424} [2024-06-27 19:33:16,160 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 272 predicate places. [2024-06-27 19:33:16,160 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 424 transitions, 7656 flow [2024-06-27 19:33:16,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:16,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:16,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:16,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 19:33:16,161 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:16,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:16,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1932936101, now seen corresponding path program 3 times [2024-06-27 19:33:16,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:16,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752166316] [2024-06-27 19:33:16,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:16,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:16,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:16,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:16,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:16,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752166316] [2024-06-27 19:33:16,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752166316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:16,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:16,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:16,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969343221] [2024-06-27 19:33:16,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:16,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:16,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:16,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:16,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:16,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:16,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 424 transitions, 7656 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:16,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:16,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:16,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:16,948 INFO L124 PetriNetUnfolderBase]: 2303/3904 cut-off events. [2024-06-27 19:33:16,949 INFO L125 PetriNetUnfolderBase]: For 345699/345707 co-relation queries the response was YES. [2024-06-27 19:33:16,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30807 conditions, 3904 events. 2303/3904 cut-off events. For 345699/345707 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 24620 event pairs, 447 based on Foata normal form. 2/3901 useless extension candidates. Maximal degree in co-relation 30661. Up to 3232 conditions per place. [2024-06-27 19:33:16,991 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 293 selfloop transitions, 149 changer transitions 0/450 dead transitions. [2024-06-27 19:33:16,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 450 transitions, 8780 flow [2024-06-27 19:33:16,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:33:16,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:33:16,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 231 transitions. [2024-06-27 19:33:16,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634146341463414 [2024-06-27 19:33:16,992 INFO L175 Difference]: Start difference. First operand has 314 places, 424 transitions, 7656 flow. Second operand 10 states and 231 transitions. [2024-06-27 19:33:16,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 450 transitions, 8780 flow [2024-06-27 19:33:17,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 450 transitions, 8434 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-27 19:33:17,905 INFO L231 Difference]: Finished difference. Result has 319 places, 424 transitions, 7614 flow [2024-06-27 19:33:17,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7310, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7614, PETRI_PLACES=319, PETRI_TRANSITIONS=424} [2024-06-27 19:33:17,906 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 277 predicate places. [2024-06-27 19:33:17,906 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 424 transitions, 7614 flow [2024-06-27 19:33:17,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:17,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:17,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:17,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 19:33:17,906 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:17,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:17,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1181182863, now seen corresponding path program 4 times [2024-06-27 19:33:17,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:17,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786706625] [2024-06-27 19:33:17,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:17,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:17,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:17,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:17,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:17,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786706625] [2024-06-27 19:33:17,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786706625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:17,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:17,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:33:17,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326303547] [2024-06-27 19:33:17,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:17,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:33:17,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:17,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:33:17,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:33:18,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:18,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 424 transitions, 7614 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:18,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:18,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:18,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:18,717 INFO L124 PetriNetUnfolderBase]: 2313/3924 cut-off events. [2024-06-27 19:33:18,718 INFO L125 PetriNetUnfolderBase]: For 353441/353443 co-relation queries the response was YES. [2024-06-27 19:33:18,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30980 conditions, 3924 events. 2313/3924 cut-off events. For 353441/353443 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 24793 event pairs, 419 based on Foata normal form. 2/3924 useless extension candidates. Maximal degree in co-relation 30833. Up to 3435 conditions per place. [2024-06-27 19:33:18,758 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 372 selfloop transitions, 71 changer transitions 0/451 dead transitions. [2024-06-27 19:33:18,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 451 transitions, 8870 flow [2024-06-27 19:33:18,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:33:18,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:33:18,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-27 19:33:18,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-27 19:33:18,759 INFO L175 Difference]: Start difference. First operand has 319 places, 424 transitions, 7614 flow. Second operand 8 states and 192 transitions. [2024-06-27 19:33:18,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 451 transitions, 8870 flow [2024-06-27 19:33:19,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 451 transitions, 8663 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 19:33:19,821 INFO L231 Difference]: Finished difference. Result has 319 places, 430 transitions, 7667 flow [2024-06-27 19:33:19,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7412, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7667, PETRI_PLACES=319, PETRI_TRANSITIONS=430} [2024-06-27 19:33:19,821 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 277 predicate places. [2024-06-27 19:33:19,821 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 430 transitions, 7667 flow [2024-06-27 19:33:19,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:19,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:19,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:19,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 19:33:19,822 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:19,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:19,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1470082885, now seen corresponding path program 5 times [2024-06-27 19:33:19,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:19,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21243980] [2024-06-27 19:33:19,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:19,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:19,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:19,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:19,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:19,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21243980] [2024-06-27 19:33:19,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21243980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:19,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:19,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:33:19,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365711117] [2024-06-27 19:33:19,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:19,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:33:19,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:19,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:33:19,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:33:19,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:19,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 430 transitions, 7667 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:19,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:19,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:19,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:20,606 INFO L124 PetriNetUnfolderBase]: 2307/3916 cut-off events. [2024-06-27 19:33:20,606 INFO L125 PetriNetUnfolderBase]: For 354846/354848 co-relation queries the response was YES. [2024-06-27 19:33:20,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30701 conditions, 3916 events. 2307/3916 cut-off events. For 354846/354848 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 24745 event pairs, 419 based on Foata normal form. 2/3916 useless extension candidates. Maximal degree in co-relation 30553. Up to 3429 conditions per place. [2024-06-27 19:33:20,649 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 370 selfloop transitions, 73 changer transitions 0/451 dead transitions. [2024-06-27 19:33:20,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 451 transitions, 8655 flow [2024-06-27 19:33:20,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:33:20,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:33:20,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-27 19:33:20,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-27 19:33:20,651 INFO L175 Difference]: Start difference. First operand has 319 places, 430 transitions, 7667 flow. Second operand 9 states and 210 transitions. [2024-06-27 19:33:20,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 451 transitions, 8655 flow [2024-06-27 19:33:22,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 451 transitions, 8493 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 19:33:22,020 INFO L231 Difference]: Finished difference. Result has 322 places, 430 transitions, 7663 flow [2024-06-27 19:33:22,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7505, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7663, PETRI_PLACES=322, PETRI_TRANSITIONS=430} [2024-06-27 19:33:22,020 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 280 predicate places. [2024-06-27 19:33:22,020 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 430 transitions, 7663 flow [2024-06-27 19:33:22,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:22,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:22,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:22,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 19:33:22,021 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:22,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:22,021 INFO L85 PathProgramCache]: Analyzing trace with hash 996482768, now seen corresponding path program 5 times [2024-06-27 19:33:22,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:22,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133299716] [2024-06-27 19:33:22,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:22,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:22,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:22,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:22,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:22,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133299716] [2024-06-27 19:33:22,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133299716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:22,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:22,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:33:22,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317985957] [2024-06-27 19:33:22,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:22,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:33:22,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:22,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:33:22,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:33:22,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:22,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 430 transitions, 7663 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:22,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:22,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:22,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:22,813 INFO L124 PetriNetUnfolderBase]: 2312/3901 cut-off events. [2024-06-27 19:33:22,814 INFO L125 PetriNetUnfolderBase]: For 363483/363483 co-relation queries the response was YES. [2024-06-27 19:33:22,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30860 conditions, 3901 events. 2312/3901 cut-off events. For 363483/363483 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 24530 event pairs, 479 based on Foata normal form. 1/3861 useless extension candidates. Maximal degree in co-relation 30711. Up to 3088 conditions per place. [2024-06-27 19:33:22,851 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 289 selfloop transitions, 163 changer transitions 0/460 dead transitions. [2024-06-27 19:33:22,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 460 transitions, 9303 flow [2024-06-27 19:33:22,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:33:22,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:33:22,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 19:33:22,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 19:33:22,853 INFO L175 Difference]: Start difference. First operand has 322 places, 430 transitions, 7663 flow. Second operand 7 states and 175 transitions. [2024-06-27 19:33:22,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 460 transitions, 9303 flow [2024-06-27 19:33:24,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 460 transitions, 9127 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 19:33:24,020 INFO L231 Difference]: Finished difference. Result has 320 places, 436 transitions, 7990 flow [2024-06-27 19:33:24,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7487, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7990, PETRI_PLACES=320, PETRI_TRANSITIONS=436} [2024-06-27 19:33:24,020 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-06-27 19:33:24,020 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 436 transitions, 7990 flow [2024-06-27 19:33:24,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:24,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:24,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:24,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 19:33:24,021 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:24,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:24,021 INFO L85 PathProgramCache]: Analyzing trace with hash -941709516, now seen corresponding path program 6 times [2024-06-27 19:33:24,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:24,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576407387] [2024-06-27 19:33:24,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:24,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:24,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:24,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:24,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:24,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576407387] [2024-06-27 19:33:24,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576407387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:24,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:24,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:33:24,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401061697] [2024-06-27 19:33:24,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:24,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:33:24,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:24,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:33:24,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:33:24,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:24,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 436 transitions, 7990 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:24,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:24,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:24,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:24,776 INFO L124 PetriNetUnfolderBase]: 2317/3906 cut-off events. [2024-06-27 19:33:24,776 INFO L125 PetriNetUnfolderBase]: For 374331/374331 co-relation queries the response was YES. [2024-06-27 19:33:24,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31385 conditions, 3906 events. 2317/3906 cut-off events. For 374331/374331 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 24566 event pairs, 477 based on Foata normal form. 1/3866 useless extension candidates. Maximal degree in co-relation 31235. Up to 3092 conditions per place. [2024-06-27 19:33:24,819 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 288 selfloop transitions, 164 changer transitions 0/460 dead transitions. [2024-06-27 19:33:24,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 460 transitions, 9546 flow [2024-06-27 19:33:24,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:33:24,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:33:24,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 19:33:24,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-27 19:33:24,821 INFO L175 Difference]: Start difference. First operand has 320 places, 436 transitions, 7990 flow. Second operand 7 states and 173 transitions. [2024-06-27 19:33:24,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 460 transitions, 9546 flow [2024-06-27 19:33:25,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 460 transitions, 9319 flow, removed 69 selfloop flow, removed 3 redundant places. [2024-06-27 19:33:25,792 INFO L231 Difference]: Finished difference. Result has 324 places, 439 transitions, 8187 flow [2024-06-27 19:33:25,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7795, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8187, PETRI_PLACES=324, PETRI_TRANSITIONS=439} [2024-06-27 19:33:25,792 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 282 predicate places. [2024-06-27 19:33:25,793 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 439 transitions, 8187 flow [2024-06-27 19:33:25,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:25,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:25,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:25,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 19:33:25,793 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:25,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:25,794 INFO L85 PathProgramCache]: Analyzing trace with hash -597623466, now seen corresponding path program 7 times [2024-06-27 19:33:25,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:25,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510309513] [2024-06-27 19:33:25,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:25,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:25,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:25,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:25,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:25,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510309513] [2024-06-27 19:33:25,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510309513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:25,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:25,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:33:25,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542704568] [2024-06-27 19:33:25,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:25,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:33:25,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:25,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:33:25,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:33:25,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:25,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 439 transitions, 8187 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:25,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:25,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:25,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:26,535 INFO L124 PetriNetUnfolderBase]: 2322/3915 cut-off events. [2024-06-27 19:33:26,536 INFO L125 PetriNetUnfolderBase]: For 383421/383421 co-relation queries the response was YES. [2024-06-27 19:33:26,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31767 conditions, 3915 events. 2322/3915 cut-off events. For 383421/383421 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 24694 event pairs, 477 based on Foata normal form. 1/3875 useless extension candidates. Maximal degree in co-relation 31615. Up to 3096 conditions per place. [2024-06-27 19:33:26,580 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 279 selfloop transitions, 172 changer transitions 0/459 dead transitions. [2024-06-27 19:33:26,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 459 transitions, 9539 flow [2024-06-27 19:33:26,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:33:26,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:33:26,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-27 19:33:26,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-27 19:33:26,581 INFO L175 Difference]: Start difference. First operand has 324 places, 439 transitions, 8187 flow. Second operand 7 states and 168 transitions. [2024-06-27 19:33:26,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 459 transitions, 9539 flow [2024-06-27 19:33:27,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 459 transitions, 9192 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-27 19:33:27,788 INFO L231 Difference]: Finished difference. Result has 327 places, 442 transitions, 8254 flow [2024-06-27 19:33:27,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7843, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8254, PETRI_PLACES=327, PETRI_TRANSITIONS=442} [2024-06-27 19:33:27,789 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 285 predicate places. [2024-06-27 19:33:27,789 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 442 transitions, 8254 flow [2024-06-27 19:33:27,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:27,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:27,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:27,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 19:33:27,790 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:27,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:27,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1205570640, now seen corresponding path program 8 times [2024-06-27 19:33:27,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:27,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39851138] [2024-06-27 19:33:27,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:27,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:27,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:27,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:27,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:27,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39851138] [2024-06-27 19:33:27,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39851138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:27,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:27,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:33:27,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28723600] [2024-06-27 19:33:27,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:27,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:33:27,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:27,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:33:27,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:33:27,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:27,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 442 transitions, 8254 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:27,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:27,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:27,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:28,567 INFO L124 PetriNetUnfolderBase]: 2327/3940 cut-off events. [2024-06-27 19:33:28,567 INFO L125 PetriNetUnfolderBase]: For 388740/388740 co-relation queries the response was YES. [2024-06-27 19:33:28,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31940 conditions, 3940 events. 2327/3940 cut-off events. For 388740/388740 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 24939 event pairs, 426 based on Foata normal form. 1/3928 useless extension candidates. Maximal degree in co-relation 31787. Up to 3234 conditions per place. [2024-06-27 19:33:28,612 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 316 selfloop transitions, 148 changer transitions 0/472 dead transitions. [2024-06-27 19:33:28,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 472 transitions, 9679 flow [2024-06-27 19:33:28,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:33:28,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:33:28,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-27 19:33:28,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236933797909407 [2024-06-27 19:33:28,613 INFO L175 Difference]: Start difference. First operand has 327 places, 442 transitions, 8254 flow. Second operand 7 states and 179 transitions. [2024-06-27 19:33:28,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 472 transitions, 9679 flow [2024-06-27 19:33:29,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 472 transitions, 9316 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-27 19:33:29,962 INFO L231 Difference]: Finished difference. Result has 331 places, 445 transitions, 8368 flow [2024-06-27 19:33:29,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7897, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8368, PETRI_PLACES=331, PETRI_TRANSITIONS=445} [2024-06-27 19:33:29,962 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 289 predicate places. [2024-06-27 19:33:29,963 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 445 transitions, 8368 flow [2024-06-27 19:33:29,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:29,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:29,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:29,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 19:33:29,963 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:29,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:29,963 INFO L85 PathProgramCache]: Analyzing trace with hash 811144534, now seen corresponding path program 9 times [2024-06-27 19:33:29,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:29,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726975523] [2024-06-27 19:33:29,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:29,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:29,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:30,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:30,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:30,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726975523] [2024-06-27 19:33:30,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726975523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:30,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:30,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:33:30,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260498365] [2024-06-27 19:33:30,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:30,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:33:30,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:30,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:33:30,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:33:30,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:30,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 445 transitions, 8368 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:30,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:30,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:30,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:30,773 INFO L124 PetriNetUnfolderBase]: 2324/3948 cut-off events. [2024-06-27 19:33:30,773 INFO L125 PetriNetUnfolderBase]: For 392004/392006 co-relation queries the response was YES. [2024-06-27 19:33:30,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32086 conditions, 3948 events. 2324/3948 cut-off events. For 392004/392006 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 25030 event pairs, 416 based on Foata normal form. 1/3947 useless extension candidates. Maximal degree in co-relation 31931. Up to 3232 conditions per place. [2024-06-27 19:33:30,820 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 324 selfloop transitions, 145 changer transitions 0/477 dead transitions. [2024-06-27 19:33:30,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 477 transitions, 9582 flow [2024-06-27 19:33:30,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:33:30,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:33:30,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-27 19:33:30,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6189024390243902 [2024-06-27 19:33:30,821 INFO L175 Difference]: Start difference. First operand has 331 places, 445 transitions, 8368 flow. Second operand 8 states and 203 transitions. [2024-06-27 19:33:30,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 477 transitions, 9582 flow [2024-06-27 19:33:32,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 477 transitions, 9248 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-27 19:33:32,324 INFO L231 Difference]: Finished difference. Result has 332 places, 445 transitions, 8342 flow [2024-06-27 19:33:32,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8034, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8342, PETRI_PLACES=332, PETRI_TRANSITIONS=445} [2024-06-27 19:33:32,325 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 290 predicate places. [2024-06-27 19:33:32,325 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 445 transitions, 8342 flow [2024-06-27 19:33:32,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:32,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:32,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:32,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 19:33:32,326 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:32,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:32,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1006965387, now seen corresponding path program 6 times [2024-06-27 19:33:32,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:32,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816440546] [2024-06-27 19:33:32,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:32,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:32,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:32,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:32,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:32,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816440546] [2024-06-27 19:33:32,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816440546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:32,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:32,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:32,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178830345] [2024-06-27 19:33:32,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:32,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:32,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:32,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:32,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:32,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:32,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 445 transitions, 8342 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:32,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:32,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:32,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:33,137 INFO L124 PetriNetUnfolderBase]: 2337/3956 cut-off events. [2024-06-27 19:33:33,137 INFO L125 PetriNetUnfolderBase]: For 409046/409046 co-relation queries the response was YES. [2024-06-27 19:33:33,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32403 conditions, 3956 events. 2337/3956 cut-off events. For 409046/409046 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 25032 event pairs, 475 based on Foata normal form. 1/3937 useless extension candidates. Maximal degree in co-relation 32247. Up to 3277 conditions per place. [2024-06-27 19:33:33,184 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 301 selfloop transitions, 165 changer transitions 0/474 dead transitions. [2024-06-27 19:33:33,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 474 transitions, 9808 flow [2024-06-27 19:33:33,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:33:33,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:33:33,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-27 19:33:33,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-27 19:33:33,185 INFO L175 Difference]: Start difference. First operand has 332 places, 445 transitions, 8342 flow. Second operand 8 states and 192 transitions. [2024-06-27 19:33:33,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 474 transitions, 9808 flow [2024-06-27 19:33:34,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 474 transitions, 9565 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 19:33:34,408 INFO L231 Difference]: Finished difference. Result has 333 places, 451 transitions, 8549 flow [2024-06-27 19:33:34,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8103, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8549, PETRI_PLACES=333, PETRI_TRANSITIONS=451} [2024-06-27 19:33:34,409 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 291 predicate places. [2024-06-27 19:33:34,409 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 451 transitions, 8549 flow [2024-06-27 19:33:34,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:34,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:34,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:34,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 19:33:34,409 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:34,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:34,410 INFO L85 PathProgramCache]: Analyzing trace with hash -941696837, now seen corresponding path program 7 times [2024-06-27 19:33:34,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:34,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869831465] [2024-06-27 19:33:34,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:34,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:34,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:34,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:34,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:34,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869831465] [2024-06-27 19:33:34,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869831465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:34,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:34,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:34,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361831628] [2024-06-27 19:33:34,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:34,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:34,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:34,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:34,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:34,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:34,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 451 transitions, 8549 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:34,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:34,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:34,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:35,279 INFO L124 PetriNetUnfolderBase]: 2334/3951 cut-off events. [2024-06-27 19:33:35,279 INFO L125 PetriNetUnfolderBase]: For 406309/406309 co-relation queries the response was YES. [2024-06-27 19:33:35,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32298 conditions, 3951 events. 2334/3951 cut-off events. For 406309/406309 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 24988 event pairs, 475 based on Foata normal form. 1/3933 useless extension candidates. Maximal degree in co-relation 32141. Up to 3274 conditions per place. [2024-06-27 19:33:35,329 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 301 selfloop transitions, 166 changer transitions 0/475 dead transitions. [2024-06-27 19:33:35,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 475 transitions, 9735 flow [2024-06-27 19:33:35,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:33:35,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:33:35,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 227 transitions. [2024-06-27 19:33:35,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5536585365853659 [2024-06-27 19:33:35,330 INFO L175 Difference]: Start difference. First operand has 333 places, 451 transitions, 8549 flow. Second operand 10 states and 227 transitions. [2024-06-27 19:33:35,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 475 transitions, 9735 flow [2024-06-27 19:33:37,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 475 transitions, 9355 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-27 19:33:37,071 INFO L231 Difference]: Finished difference. Result has 338 places, 451 transitions, 8507 flow [2024-06-27 19:33:37,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8169, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8507, PETRI_PLACES=338, PETRI_TRANSITIONS=451} [2024-06-27 19:33:37,072 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 296 predicate places. [2024-06-27 19:33:37,072 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 451 transitions, 8507 flow [2024-06-27 19:33:37,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:37,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:37,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:37,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 19:33:37,073 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:37,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:37,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1556279665, now seen corresponding path program 8 times [2024-06-27 19:33:37,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:37,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524532162] [2024-06-27 19:33:37,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:37,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:37,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:37,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:37,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:37,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524532162] [2024-06-27 19:33:37,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524532162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:37,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:37,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:33:37,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570017855] [2024-06-27 19:33:37,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:37,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:33:37,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:37,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:33:37,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:33:37,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:37,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 451 transitions, 8507 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:37,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:37,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:37,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:37,933 INFO L124 PetriNetUnfolderBase]: 2339/3974 cut-off events. [2024-06-27 19:33:37,933 INFO L125 PetriNetUnfolderBase]: For 416345/416351 co-relation queries the response was YES. [2024-06-27 19:33:37,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32430 conditions, 3974 events. 2339/3974 cut-off events. For 416345/416351 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 25291 event pairs, 471 based on Foata normal form. 5/3969 useless extension candidates. Maximal degree in co-relation 32272. Up to 3280 conditions per place. [2024-06-27 19:33:37,981 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 307 selfloop transitions, 162 changer transitions 0/477 dead transitions. [2024-06-27 19:33:37,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 477 transitions, 9959 flow [2024-06-27 19:33:37,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:33:37,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:33:37,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-27 19:33:37,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-27 19:33:37,982 INFO L175 Difference]: Start difference. First operand has 338 places, 451 transitions, 8507 flow. Second operand 7 states and 171 transitions. [2024-06-27 19:33:37,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 477 transitions, 9959 flow [2024-06-27 19:33:39,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 477 transitions, 9732 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 19:33:39,408 INFO L231 Difference]: Finished difference. Result has 338 places, 455 transitions, 8698 flow [2024-06-27 19:33:39,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8284, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8698, PETRI_PLACES=338, PETRI_TRANSITIONS=455} [2024-06-27 19:33:39,409 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 296 predicate places. [2024-06-27 19:33:39,409 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 455 transitions, 8698 flow [2024-06-27 19:33:39,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:39,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:39,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:39,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 19:33:39,410 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:39,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:39,410 INFO L85 PathProgramCache]: Analyzing trace with hash -525160205, now seen corresponding path program 9 times [2024-06-27 19:33:39,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:39,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199036406] [2024-06-27 19:33:39,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:39,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:39,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:39,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:39,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:39,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199036406] [2024-06-27 19:33:39,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199036406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:39,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:39,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:33:39,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802502033] [2024-06-27 19:33:39,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:39,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:33:39,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:39,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:33:39,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:33:39,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:39,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 455 transitions, 8698 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:39,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:39,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:39,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:40,211 INFO L124 PetriNetUnfolderBase]: 2352/3992 cut-off events. [2024-06-27 19:33:40,211 INFO L125 PetriNetUnfolderBase]: For 431261/431267 co-relation queries the response was YES. [2024-06-27 19:33:40,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32817 conditions, 3992 events. 2352/3992 cut-off events. For 431261/431267 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 25388 event pairs, 469 based on Foata normal form. 5/3987 useless extension candidates. Maximal degree in co-relation 32657. Up to 3295 conditions per place. [2024-06-27 19:33:40,262 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 305 selfloop transitions, 167 changer transitions 0/480 dead transitions. [2024-06-27 19:33:40,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 480 transitions, 10192 flow [2024-06-27 19:33:40,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:33:40,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:33:40,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-27 19:33:40,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-27 19:33:40,264 INFO L175 Difference]: Start difference. First operand has 338 places, 455 transitions, 8698 flow. Second operand 7 states and 169 transitions. [2024-06-27 19:33:40,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 480 transitions, 10192 flow [2024-06-27 19:33:41,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 480 transitions, 9918 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-27 19:33:41,607 INFO L231 Difference]: Finished difference. Result has 343 places, 461 transitions, 8896 flow [2024-06-27 19:33:41,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8434, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8896, PETRI_PLACES=343, PETRI_TRANSITIONS=461} [2024-06-27 19:33:41,607 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 301 predicate places. [2024-06-27 19:33:41,608 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 461 transitions, 8896 flow [2024-06-27 19:33:41,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:41,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:41,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:41,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 19:33:41,608 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:41,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:41,609 INFO L85 PathProgramCache]: Analyzing trace with hash -551457397, now seen corresponding path program 10 times [2024-06-27 19:33:41,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:41,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499559417] [2024-06-27 19:33:41,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:41,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:41,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:41,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:41,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:41,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499559417] [2024-06-27 19:33:41,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499559417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:41,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:41,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:33:41,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725006612] [2024-06-27 19:33:41,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:41,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:33:41,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:41,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:33:41,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:33:41,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:41,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 461 transitions, 8896 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:41,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:41,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:41,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:42,467 INFO L124 PetriNetUnfolderBase]: 2349/3996 cut-off events. [2024-06-27 19:33:42,467 INFO L125 PetriNetUnfolderBase]: For 435207/435223 co-relation queries the response was YES. [2024-06-27 19:33:42,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32755 conditions, 3996 events. 2349/3996 cut-off events. For 435207/435223 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 25488 event pairs, 444 based on Foata normal form. 5/3998 useless extension candidates. Maximal degree in co-relation 32593. Up to 3557 conditions per place. [2024-06-27 19:33:42,516 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 428 selfloop transitions, 39 changer transitions 0/475 dead transitions. [2024-06-27 19:33:42,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 475 transitions, 9870 flow [2024-06-27 19:33:42,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:33:42,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:33:42,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-27 19:33:42,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5644599303135889 [2024-06-27 19:33:42,517 INFO L175 Difference]: Start difference. First operand has 343 places, 461 transitions, 8896 flow. Second operand 7 states and 162 transitions. [2024-06-27 19:33:42,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 475 transitions, 9870 flow [2024-06-27 19:33:44,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 475 transitions, 9594 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-27 19:33:44,454 INFO L231 Difference]: Finished difference. Result has 347 places, 461 transitions, 8704 flow [2024-06-27 19:33:44,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8620, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8704, PETRI_PLACES=347, PETRI_TRANSITIONS=461} [2024-06-27 19:33:44,454 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 305 predicate places. [2024-06-27 19:33:44,455 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 461 transitions, 8704 flow [2024-06-27 19:33:44,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:44,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:44,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:44,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 19:33:44,455 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:44,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:44,456 INFO L85 PathProgramCache]: Analyzing trace with hash 280822877, now seen corresponding path program 11 times [2024-06-27 19:33:44,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:44,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007155325] [2024-06-27 19:33:44,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:44,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:44,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:44,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:44,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:44,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007155325] [2024-06-27 19:33:44,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007155325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:44,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:44,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:44,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715219570] [2024-06-27 19:33:44,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:44,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:44,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:44,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:44,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:44,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:44,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 461 transitions, 8704 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:44,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:44,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:44,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:45,315 INFO L124 PetriNetUnfolderBase]: 2370/4015 cut-off events. [2024-06-27 19:33:45,315 INFO L125 PetriNetUnfolderBase]: For 451604/451604 co-relation queries the response was YES. [2024-06-27 19:33:45,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32966 conditions, 4015 events. 2370/4015 cut-off events. For 451604/451604 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 25518 event pairs, 467 based on Foata normal form. 1/4001 useless extension candidates. Maximal degree in co-relation 32803. Up to 3316 conditions per place. [2024-06-27 19:33:45,376 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 298 selfloop transitions, 188 changer transitions 0/494 dead transitions. [2024-06-27 19:33:45,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 494 transitions, 10480 flow [2024-06-27 19:33:45,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:33:45,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:33:45,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 249 transitions. [2024-06-27 19:33:45,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5521064301552107 [2024-06-27 19:33:45,378 INFO L175 Difference]: Start difference. First operand has 347 places, 461 transitions, 8704 flow. Second operand 11 states and 249 transitions. [2024-06-27 19:33:45,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 494 transitions, 10480 flow [2024-06-27 19:33:46,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 494 transitions, 10377 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 19:33:46,945 INFO L231 Difference]: Finished difference. Result has 352 places, 470 transitions, 9169 flow [2024-06-27 19:33:46,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8601, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9169, PETRI_PLACES=352, PETRI_TRANSITIONS=470} [2024-06-27 19:33:46,946 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 310 predicate places. [2024-06-27 19:33:46,946 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 470 transitions, 9169 flow [2024-06-27 19:33:46,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:46,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:46,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:46,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 19:33:46,946 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:46,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:46,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1351051437, now seen corresponding path program 12 times [2024-06-27 19:33:46,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:46,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725679454] [2024-06-27 19:33:46,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:46,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:46,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:47,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:47,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:47,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725679454] [2024-06-27 19:33:47,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725679454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:47,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:47,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:47,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646744006] [2024-06-27 19:33:47,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:47,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:47,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:47,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:47,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:47,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:47,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 470 transitions, 9169 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:47,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:47,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:47,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:47,880 INFO L124 PetriNetUnfolderBase]: 2367/4015 cut-off events. [2024-06-27 19:33:47,880 INFO L125 PetriNetUnfolderBase]: For 458838/458838 co-relation queries the response was YES. [2024-06-27 19:33:47,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33299 conditions, 4015 events. 2367/4015 cut-off events. For 458838/458838 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 25565 event pairs, 469 based on Foata normal form. 1/4001 useless extension candidates. Maximal degree in co-relation 33135. Up to 3313 conditions per place. [2024-06-27 19:33:47,921 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 299 selfloop transitions, 186 changer transitions 0/493 dead transitions. [2024-06-27 19:33:47,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 493 transitions, 10761 flow [2024-06-27 19:33:47,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:33:47,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:33:47,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 231 transitions. [2024-06-27 19:33:47,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634146341463414 [2024-06-27 19:33:47,940 INFO L175 Difference]: Start difference. First operand has 352 places, 470 transitions, 9169 flow. Second operand 10 states and 231 transitions. [2024-06-27 19:33:47,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 493 transitions, 10761 flow [2024-06-27 19:33:49,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 493 transitions, 10144 flow, removed 50 selfloop flow, removed 8 redundant places. [2024-06-27 19:33:49,447 INFO L231 Difference]: Finished difference. Result has 354 places, 470 transitions, 8930 flow [2024-06-27 19:33:49,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8552, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8930, PETRI_PLACES=354, PETRI_TRANSITIONS=470} [2024-06-27 19:33:49,448 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 312 predicate places. [2024-06-27 19:33:49,448 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 470 transitions, 8930 flow [2024-06-27 19:33:49,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:49,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:49,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:49,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 19:33:49,448 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:49,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:49,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1920996335, now seen corresponding path program 13 times [2024-06-27 19:33:49,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:49,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395798924] [2024-06-27 19:33:49,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:49,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:49,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:49,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:49,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:49,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395798924] [2024-06-27 19:33:49,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395798924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:49,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:49,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:49,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929536273] [2024-06-27 19:33:49,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:49,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:49,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:49,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:49,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:49,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:49,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 470 transitions, 8930 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:49,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:49,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:49,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:50,302 INFO L124 PetriNetUnfolderBase]: 2364/4009 cut-off events. [2024-06-27 19:33:50,302 INFO L125 PetriNetUnfolderBase]: For 458390/458390 co-relation queries the response was YES. [2024-06-27 19:33:50,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33085 conditions, 4009 events. 2364/4009 cut-off events. For 458390/458390 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 25522 event pairs, 469 based on Foata normal form. 1/3995 useless extension candidates. Maximal degree in co-relation 32921. Up to 3310 conditions per place. [2024-06-27 19:33:50,351 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 299 selfloop transitions, 184 changer transitions 0/491 dead transitions. [2024-06-27 19:33:50,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 491 transitions, 10520 flow [2024-06-27 19:33:50,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:33:50,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:33:50,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-27 19:33:50,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-27 19:33:50,352 INFO L175 Difference]: Start difference. First operand has 354 places, 470 transitions, 8930 flow. Second operand 8 states and 191 transitions. [2024-06-27 19:33:50,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 491 transitions, 10520 flow [2024-06-27 19:33:52,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 491 transitions, 10158 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 19:33:52,272 INFO L231 Difference]: Finished difference. Result has 356 places, 470 transitions, 8942 flow [2024-06-27 19:33:52,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8568, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8942, PETRI_PLACES=356, PETRI_TRANSITIONS=470} [2024-06-27 19:33:52,273 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 314 predicate places. [2024-06-27 19:33:52,273 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 470 transitions, 8942 flow [2024-06-27 19:33:52,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:52,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:52,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:52,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 19:33:52,274 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:52,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:52,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1920983315, now seen corresponding path program 14 times [2024-06-27 19:33:52,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:52,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900830689] [2024-06-27 19:33:52,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:52,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:52,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:52,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:52,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:52,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900830689] [2024-06-27 19:33:52,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900830689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:52,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:52,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:52,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4038939] [2024-06-27 19:33:52,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:52,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:52,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:52,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:52,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:52,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:52,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 470 transitions, 8942 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:52,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:52,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:52,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:53,155 INFO L124 PetriNetUnfolderBase]: 2374/4035 cut-off events. [2024-06-27 19:33:53,156 INFO L125 PetriNetUnfolderBase]: For 466286/466296 co-relation queries the response was YES. [2024-06-27 19:33:53,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33303 conditions, 4035 events. 2374/4035 cut-off events. For 466286/466296 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 25763 event pairs, 444 based on Foata normal form. 1/4032 useless extension candidates. Maximal degree in co-relation 33138. Up to 3591 conditions per place. [2024-06-27 19:33:53,206 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 438 selfloop transitions, 45 changer transitions 0/491 dead transitions. [2024-06-27 19:33:53,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 491 transitions, 10050 flow [2024-06-27 19:33:53,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:33:53,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:33:53,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-27 19:33:53,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5579268292682927 [2024-06-27 19:33:53,208 INFO L175 Difference]: Start difference. First operand has 356 places, 470 transitions, 8942 flow. Second operand 8 states and 183 transitions. [2024-06-27 19:33:53,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 491 transitions, 10050 flow [2024-06-27 19:33:55,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 491 transitions, 9664 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 19:33:55,144 INFO L231 Difference]: Finished difference. Result has 357 places, 476 transitions, 8758 flow [2024-06-27 19:33:55,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8568, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8758, PETRI_PLACES=357, PETRI_TRANSITIONS=476} [2024-06-27 19:33:55,145 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 315 predicate places. [2024-06-27 19:33:55,145 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 476 transitions, 8758 flow [2024-06-27 19:33:55,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:55,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:55,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:55,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 19:33:55,146 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:55,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:55,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1351460637, now seen corresponding path program 15 times [2024-06-27 19:33:55,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:55,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981058357] [2024-06-27 19:33:55,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:55,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:55,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:55,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:55,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:55,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981058357] [2024-06-27 19:33:55,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981058357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:55,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:55,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:55,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789674996] [2024-06-27 19:33:55,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:55,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:55,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:55,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:55,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:55,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:55,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 476 transitions, 8758 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:55,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:55,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:55,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:56,011 INFO L124 PetriNetUnfolderBase]: 2371/4033 cut-off events. [2024-06-27 19:33:56,012 INFO L125 PetriNetUnfolderBase]: For 467032/467042 co-relation queries the response was YES. [2024-06-27 19:33:56,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32930 conditions, 4033 events. 2371/4033 cut-off events. For 467032/467042 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 25801 event pairs, 444 based on Foata normal form. 1/4030 useless extension candidates. Maximal degree in co-relation 32764. Up to 3577 conditions per place. [2024-06-27 19:33:56,062 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 431 selfloop transitions, 55 changer transitions 0/494 dead transitions. [2024-06-27 19:33:56,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 494 transitions, 9968 flow [2024-06-27 19:33:56,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:33:56,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:33:56,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 221 transitions. [2024-06-27 19:33:56,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390243902439025 [2024-06-27 19:33:56,064 INFO L175 Difference]: Start difference. First operand has 357 places, 476 transitions, 8758 flow. Second operand 10 states and 221 transitions. [2024-06-27 19:33:56,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 494 transitions, 9968 flow [2024-06-27 19:33:57,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 494 transitions, 9860 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 19:33:57,694 INFO L231 Difference]: Finished difference. Result has 362 places, 476 transitions, 8766 flow [2024-06-27 19:33:57,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8650, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8766, PETRI_PLACES=362, PETRI_TRANSITIONS=476} [2024-06-27 19:33:57,694 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 320 predicate places. [2024-06-27 19:33:57,694 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 476 transitions, 8766 flow [2024-06-27 19:33:57,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:57,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:57,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:57,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 19:33:57,695 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:57,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:57,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1915188485, now seen corresponding path program 16 times [2024-06-27 19:33:57,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:57,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140139445] [2024-06-27 19:33:57,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:57,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:57,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:57,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:57,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:57,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140139445] [2024-06-27 19:33:57,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140139445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:57,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:57,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:57,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403684560] [2024-06-27 19:33:57,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:57,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:57,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:57,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:57,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:57,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:33:57,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 476 transitions, 8766 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:57,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:57,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:33:57,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:58,630 INFO L124 PetriNetUnfolderBase]: 2368/4029 cut-off events. [2024-06-27 19:33:58,630 INFO L125 PetriNetUnfolderBase]: For 471047/471057 co-relation queries the response was YES. [2024-06-27 19:33:58,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32903 conditions, 4029 events. 2368/4029 cut-off events. For 471047/471057 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 25797 event pairs, 444 based on Foata normal form. 1/4026 useless extension candidates. Maximal degree in co-relation 32736. Up to 3574 conditions per place. [2024-06-27 19:33:58,681 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 432 selfloop transitions, 55 changer transitions 0/495 dead transitions. [2024-06-27 19:33:58,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 495 transitions, 9790 flow [2024-06-27 19:33:58,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:33:58,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:33:58,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 258 transitions. [2024-06-27 19:33:58,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-27 19:33:58,682 INFO L175 Difference]: Start difference. First operand has 362 places, 476 transitions, 8766 flow. Second operand 12 states and 258 transitions. [2024-06-27 19:33:58,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 495 transitions, 9790 flow [2024-06-27 19:34:00,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 495 transitions, 9556 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-27 19:34:00,486 INFO L231 Difference]: Finished difference. Result has 364 places, 476 transitions, 8648 flow [2024-06-27 19:34:00,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8532, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8648, PETRI_PLACES=364, PETRI_TRANSITIONS=476} [2024-06-27 19:34:00,487 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 322 predicate places. [2024-06-27 19:34:00,487 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 476 transitions, 8648 flow [2024-06-27 19:34:00,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:00,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:00,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:00,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 19:34:00,487 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:00,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:00,488 INFO L85 PathProgramCache]: Analyzing trace with hash 204429931, now seen corresponding path program 17 times [2024-06-27 19:34:00,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:00,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158713409] [2024-06-27 19:34:00,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:00,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:00,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:00,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:00,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:00,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158713409] [2024-06-27 19:34:00,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158713409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:00,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:00,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:34:00,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346289956] [2024-06-27 19:34:00,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:00,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:34:00,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:00,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:34:00,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:34:00,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:34:00,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 476 transitions, 8648 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:00,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:00,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:34:00,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:01,370 INFO L124 PetriNetUnfolderBase]: 2365/4028 cut-off events. [2024-06-27 19:34:01,371 INFO L125 PetriNetUnfolderBase]: For 471125/471125 co-relation queries the response was YES. [2024-06-27 19:34:01,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32802 conditions, 4028 events. 2365/4028 cut-off events. For 471125/471125 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 25766 event pairs, 430 based on Foata normal form. 1/4027 useless extension candidates. Maximal degree in co-relation 32636. Up to 3480 conditions per place. [2024-06-27 19:34:01,422 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 414 selfloop transitions, 79 changer transitions 0/501 dead transitions. [2024-06-27 19:34:01,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 501 transitions, 9912 flow [2024-06-27 19:34:01,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:34:01,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:34:01,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-27 19:34:01,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2024-06-27 19:34:01,424 INFO L175 Difference]: Start difference. First operand has 364 places, 476 transitions, 8648 flow. Second operand 6 states and 159 transitions. [2024-06-27 19:34:01,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 501 transitions, 9912 flow [2024-06-27 19:34:03,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 501 transitions, 9759 flow, removed 3 selfloop flow, removed 14 redundant places. [2024-06-27 19:34:03,253 INFO L231 Difference]: Finished difference. Result has 356 places, 476 transitions, 8677 flow [2024-06-27 19:34:03,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8495, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8677, PETRI_PLACES=356, PETRI_TRANSITIONS=476} [2024-06-27 19:34:03,254 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 314 predicate places. [2024-06-27 19:34:03,254 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 476 transitions, 8677 flow [2024-06-27 19:34:03,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:03,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:03,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:03,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 19:34:03,255 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:03,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:03,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1965512927, now seen corresponding path program 18 times [2024-06-27 19:34:03,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:03,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750743188] [2024-06-27 19:34:03,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:03,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:03,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:03,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:03,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:03,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750743188] [2024-06-27 19:34:03,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750743188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:03,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:03,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:34:03,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299726681] [2024-06-27 19:34:03,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:03,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:34:03,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:03,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:34:03,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:34:03,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:34:03,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 476 transitions, 8677 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:03,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:03,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:34:03,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:04,134 INFO L124 PetriNetUnfolderBase]: 2375/4043 cut-off events. [2024-06-27 19:34:04,134 INFO L125 PetriNetUnfolderBase]: For 483612/483614 co-relation queries the response was YES. [2024-06-27 19:34:04,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33108 conditions, 4043 events. 2375/4043 cut-off events. For 483612/483614 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 25897 event pairs, 419 based on Foata normal form. 2/4043 useless extension candidates. Maximal degree in co-relation 32941. Up to 3302 conditions per place. [2024-06-27 19:34:04,186 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 323 selfloop transitions, 179 changer transitions 0/510 dead transitions. [2024-06-27 19:34:04,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 510 transitions, 10253 flow [2024-06-27 19:34:04,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:34:04,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:34:04,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-27 19:34:04,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-27 19:34:04,187 INFO L175 Difference]: Start difference. First operand has 356 places, 476 transitions, 8677 flow. Second operand 9 states and 222 transitions. [2024-06-27 19:34:04,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 510 transitions, 10253 flow [2024-06-27 19:34:06,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 510 transitions, 10162 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 19:34:06,407 INFO L231 Difference]: Finished difference. Result has 362 places, 482 transitions, 9061 flow [2024-06-27 19:34:06,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8586, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9061, PETRI_PLACES=362, PETRI_TRANSITIONS=482} [2024-06-27 19:34:06,408 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 320 predicate places. [2024-06-27 19:34:06,408 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 482 transitions, 9061 flow [2024-06-27 19:34:06,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:06,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:06,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:06,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 19:34:06,409 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:06,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:06,409 INFO L85 PathProgramCache]: Analyzing trace with hash 80025565, now seen corresponding path program 19 times [2024-06-27 19:34:06,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:06,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294729445] [2024-06-27 19:34:06,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:06,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:06,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:06,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:06,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:06,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294729445] [2024-06-27 19:34:06,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294729445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:06,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:06,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:34:06,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927940635] [2024-06-27 19:34:06,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:06,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:34:06,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:06,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:34:06,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:34:06,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:34:06,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 482 transitions, 9061 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:06,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:06,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:34:06,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:07,284 INFO L124 PetriNetUnfolderBase]: 2369/4036 cut-off events. [2024-06-27 19:34:07,284 INFO L125 PetriNetUnfolderBase]: For 485203/485205 co-relation queries the response was YES. [2024-06-27 19:34:07,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33253 conditions, 4036 events. 2369/4036 cut-off events. For 485203/485205 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 25842 event pairs, 418 based on Foata normal form. 2/4036 useless extension candidates. Maximal degree in co-relation 33085. Up to 3296 conditions per place. [2024-06-27 19:34:07,334 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 322 selfloop transitions, 183 changer transitions 0/513 dead transitions. [2024-06-27 19:34:07,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 513 transitions, 10567 flow [2024-06-27 19:34:07,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:34:07,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:34:07,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-27 19:34:07,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6280487804878049 [2024-06-27 19:34:07,336 INFO L175 Difference]: Start difference. First operand has 362 places, 482 transitions, 9061 flow. Second operand 8 states and 206 transitions. [2024-06-27 19:34:07,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 513 transitions, 10567 flow [2024-06-27 19:34:09,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 513 transitions, 10250 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-27 19:34:09,379 INFO L231 Difference]: Finished difference. Result has 363 places, 482 transitions, 9132 flow [2024-06-27 19:34:09,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8748, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9132, PETRI_PLACES=363, PETRI_TRANSITIONS=482} [2024-06-27 19:34:09,380 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 321 predicate places. [2024-06-27 19:34:09,380 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 482 transitions, 9132 flow [2024-06-27 19:34:09,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:09,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:09,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:09,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 19:34:09,381 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:09,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:09,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1411264625, now seen corresponding path program 20 times [2024-06-27 19:34:09,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:09,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040942376] [2024-06-27 19:34:09,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:09,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:09,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:09,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:09,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:09,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040942376] [2024-06-27 19:34:09,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040942376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:09,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:09,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:34:09,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227237027] [2024-06-27 19:34:09,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:09,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:34:09,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:09,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:34:09,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:34:09,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:34:09,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 482 transitions, 9132 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:09,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:09,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:34:09,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:10,266 INFO L124 PetriNetUnfolderBase]: 2366/4034 cut-off events. [2024-06-27 19:34:10,266 INFO L125 PetriNetUnfolderBase]: For 478814/478814 co-relation queries the response was YES. [2024-06-27 19:34:10,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33182 conditions, 4034 events. 2366/4034 cut-off events. For 478814/478814 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 25893 event pairs, 430 based on Foata normal form. 1/4033 useless extension candidates. Maximal degree in co-relation 33014. Up to 3483 conditions per place. [2024-06-27 19:34:10,317 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 424 selfloop transitions, 82 changer transitions 0/514 dead transitions. [2024-06-27 19:34:10,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 514 transitions, 10252 flow [2024-06-27 19:34:10,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:34:10,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:34:10,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-27 19:34:10,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-27 19:34:10,318 INFO L175 Difference]: Start difference. First operand has 363 places, 482 transitions, 9132 flow. Second operand 8 states and 204 transitions. [2024-06-27 19:34:10,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 514 transitions, 10252 flow [2024-06-27 19:34:12,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 514 transitions, 9907 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 19:34:12,695 INFO L231 Difference]: Finished difference. Result has 365 places, 482 transitions, 8968 flow [2024-06-27 19:34:12,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8787, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8968, PETRI_PLACES=365, PETRI_TRANSITIONS=482} [2024-06-27 19:34:12,695 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 323 predicate places. [2024-06-27 19:34:12,695 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 482 transitions, 8968 flow [2024-06-27 19:34:12,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:12,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:12,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:12,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 19:34:12,696 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:12,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:12,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1364252109, now seen corresponding path program 21 times [2024-06-27 19:34:12,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:12,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540217122] [2024-06-27 19:34:12,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:12,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:12,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:12,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:12,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:12,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540217122] [2024-06-27 19:34:12,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540217122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:12,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:12,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:34:12,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295248311] [2024-06-27 19:34:12,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:12,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:34:12,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:12,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:34:12,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:34:12,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:34:12,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 482 transitions, 8968 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:12,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:12,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:34:12,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:13,590 INFO L124 PetriNetUnfolderBase]: 2363/4022 cut-off events. [2024-06-27 19:34:13,590 INFO L125 PetriNetUnfolderBase]: For 470379/470379 co-relation queries the response was YES. [2024-06-27 19:34:13,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32867 conditions, 4022 events. 2363/4022 cut-off events. For 470379/470379 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 25757 event pairs, 438 based on Foata normal form. 1/4010 useless extension candidates. Maximal degree in co-relation 32699. Up to 3290 conditions per place. [2024-06-27 19:34:13,636 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 322 selfloop transitions, 177 changer transitions 0/507 dead transitions. [2024-06-27 19:34:13,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 507 transitions, 10446 flow [2024-06-27 19:34:13,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:34:13,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:34:13,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-27 19:34:13,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236933797909407 [2024-06-27 19:34:13,637 INFO L175 Difference]: Start difference. First operand has 365 places, 482 transitions, 8968 flow. Second operand 7 states and 179 transitions. [2024-06-27 19:34:13,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 507 transitions, 10446 flow [2024-06-27 19:34:15,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 507 transitions, 10279 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 19:34:15,861 INFO L231 Difference]: Finished difference. Result has 366 places, 482 transitions, 9165 flow [2024-06-27 19:34:15,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8805, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9165, PETRI_PLACES=366, PETRI_TRANSITIONS=482} [2024-06-27 19:34:15,862 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 324 predicate places. [2024-06-27 19:34:15,862 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 482 transitions, 9165 flow [2024-06-27 19:34:15,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:15,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:15,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:15,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 19:34:15,863 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:15,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:15,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1914963363, now seen corresponding path program 1 times [2024-06-27 19:34:15,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:15,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117826526] [2024-06-27 19:34:15,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:15,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:15,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:15,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:15,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:15,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117826526] [2024-06-27 19:34:15,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117826526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:15,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:15,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:34:15,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830966756] [2024-06-27 19:34:15,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:15,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:34:15,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:15,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:34:15,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:34:15,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:34:15,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 482 transitions, 9165 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:15,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:15,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:34:15,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:16,755 INFO L124 PetriNetUnfolderBase]: 2370/4044 cut-off events. [2024-06-27 19:34:16,755 INFO L125 PetriNetUnfolderBase]: For 470544/470554 co-relation queries the response was YES. [2024-06-27 19:34:16,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32547 conditions, 4044 events. 2370/4044 cut-off events. For 470544/470554 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 25980 event pairs, 437 based on Foata normal form. 6/4046 useless extension candidates. Maximal degree in co-relation 32379. Up to 3527 conditions per place. [2024-06-27 19:34:16,804 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 452 selfloop transitions, 47 changer transitions 0/507 dead transitions. [2024-06-27 19:34:16,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 507 transitions, 10268 flow [2024-06-27 19:34:16,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:34:16,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:34:16,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 223 transitions. [2024-06-27 19:34:16,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5439024390243903 [2024-06-27 19:34:16,806 INFO L175 Difference]: Start difference. First operand has 366 places, 482 transitions, 9165 flow. Second operand 10 states and 223 transitions. [2024-06-27 19:34:16,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 507 transitions, 10268 flow [2024-06-27 19:34:19,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 507 transitions, 9357 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-27 19:34:19,191 INFO L231 Difference]: Finished difference. Result has 365 places, 483 transitions, 8371 flow [2024-06-27 19:34:19,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8254, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8371, PETRI_PLACES=365, PETRI_TRANSITIONS=483} [2024-06-27 19:34:19,192 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 323 predicate places. [2024-06-27 19:34:19,192 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 483 transitions, 8371 flow [2024-06-27 19:34:19,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:19,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:19,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:19,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 19:34:19,193 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:19,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:19,194 INFO L85 PathProgramCache]: Analyzing trace with hash 204921963, now seen corresponding path program 2 times [2024-06-27 19:34:19,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:19,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970532586] [2024-06-27 19:34:19,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:19,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:19,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:19,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:19,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:19,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970532586] [2024-06-27 19:34:19,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970532586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:19,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:19,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:34:19,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037142161] [2024-06-27 19:34:19,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:19,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:34:19,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:19,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:34:19,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:34:19,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:34:19,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 483 transitions, 8371 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:19,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:19,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:34:19,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:20,125 INFO L124 PetriNetUnfolderBase]: 2357/4029 cut-off events. [2024-06-27 19:34:20,125 INFO L125 PetriNetUnfolderBase]: For 437402/437412 co-relation queries the response was YES. [2024-06-27 19:34:20,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31323 conditions, 4029 events. 2357/4029 cut-off events. For 437402/437412 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 25884 event pairs, 386 based on Foata normal form. 6/4033 useless extension candidates. Maximal degree in co-relation 31153. Up to 3487 conditions per place. [2024-06-27 19:34:20,167 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 469 selfloop transitions, 30 changer transitions 0/507 dead transitions. [2024-06-27 19:34:20,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 507 transitions, 9479 flow [2024-06-27 19:34:20,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:34:20,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:34:20,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-27 19:34:20,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-27 19:34:20,168 INFO L175 Difference]: Start difference. First operand has 365 places, 483 transitions, 8371 flow. Second operand 6 states and 153 transitions. [2024-06-27 19:34:20,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 507 transitions, 9479 flow [2024-06-27 19:34:22,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 507 transitions, 9354 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-27 19:34:22,114 INFO L231 Difference]: Finished difference. Result has 362 places, 483 transitions, 8311 flow [2024-06-27 19:34:22,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8246, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8311, PETRI_PLACES=362, PETRI_TRANSITIONS=483} [2024-06-27 19:34:22,114 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 320 predicate places. [2024-06-27 19:34:22,114 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 483 transitions, 8311 flow [2024-06-27 19:34:22,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:22,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:22,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:22,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 19:34:22,115 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:22,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:22,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1491753271, now seen corresponding path program 1 times [2024-06-27 19:34:22,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:22,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708702814] [2024-06-27 19:34:22,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:22,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:22,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:22,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:22,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:22,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708702814] [2024-06-27 19:34:22,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708702814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:22,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:22,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:34:22,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014967255] [2024-06-27 19:34:22,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:22,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:34:22,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:22,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:34:22,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:34:22,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:34:22,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 483 transitions, 8311 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:22,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:22,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:34:22,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:23,011 INFO L124 PetriNetUnfolderBase]: 2362/4034 cut-off events. [2024-06-27 19:34:23,011 INFO L125 PetriNetUnfolderBase]: For 415902/415902 co-relation queries the response was YES. [2024-06-27 19:34:23,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31264 conditions, 4034 events. 2362/4034 cut-off events. For 415902/415902 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 25907 event pairs, 409 based on Foata normal form. 1/4033 useless extension candidates. Maximal degree in co-relation 31094. Up to 3509 conditions per place. [2024-06-27 19:34:23,061 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 454 selfloop transitions, 58 changer transitions 0/520 dead transitions. [2024-06-27 19:34:23,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 520 transitions, 9705 flow [2024-06-27 19:34:23,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:34:23,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:34:23,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-27 19:34:23,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-27 19:34:23,062 INFO L175 Difference]: Start difference. First operand has 362 places, 483 transitions, 8311 flow. Second operand 8 states and 197 transitions. [2024-06-27 19:34:23,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 520 transitions, 9705 flow [2024-06-27 19:34:24,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 520 transitions, 9596 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 19:34:24,985 INFO L231 Difference]: Finished difference. Result has 364 places, 486 transitions, 8378 flow [2024-06-27 19:34:24,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8202, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8378, PETRI_PLACES=364, PETRI_TRANSITIONS=486} [2024-06-27 19:34:24,986 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 322 predicate places. [2024-06-27 19:34:24,986 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 486 transitions, 8378 flow [2024-06-27 19:34:24,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:24,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:24,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:24,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 19:34:24,986 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:24,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:24,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1491633301, now seen corresponding path program 2 times [2024-06-27 19:34:24,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:24,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717443790] [2024-06-27 19:34:24,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:24,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:24,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:25,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:25,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:25,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717443790] [2024-06-27 19:34:25,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717443790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:25,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:25,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:34:25,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696211611] [2024-06-27 19:34:25,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:25,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:34:25,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:25,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:34:25,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:34:25,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:34:25,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 486 transitions, 8378 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:25,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:25,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:34:25,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:25,914 INFO L124 PetriNetUnfolderBase]: 2359/4030 cut-off events. [2024-06-27 19:34:25,914 INFO L125 PetriNetUnfolderBase]: For 418135/418135 co-relation queries the response was YES. [2024-06-27 19:34:25,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31034 conditions, 4030 events. 2359/4030 cut-off events. For 418135/418135 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 25902 event pairs, 409 based on Foata normal form. 1/4029 useless extension candidates. Maximal degree in co-relation 30864. Up to 3506 conditions per place. [2024-06-27 19:34:25,967 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 455 selfloop transitions, 57 changer transitions 0/520 dead transitions. [2024-06-27 19:34:25,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 520 transitions, 9518 flow [2024-06-27 19:34:25,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:34:25,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:34:25,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-27 19:34:25,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5826558265582655 [2024-06-27 19:34:25,969 INFO L175 Difference]: Start difference. First operand has 364 places, 486 transitions, 8378 flow. Second operand 9 states and 215 transitions. [2024-06-27 19:34:25,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 520 transitions, 9518 flow [2024-06-27 19:34:28,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 520 transitions, 9380 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 19:34:28,309 INFO L231 Difference]: Finished difference. Result has 367 places, 486 transitions, 8360 flow [2024-06-27 19:34:28,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8240, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8360, PETRI_PLACES=367, PETRI_TRANSITIONS=486} [2024-06-27 19:34:28,309 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 325 predicate places. [2024-06-27 19:34:28,309 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 486 transitions, 8360 flow [2024-06-27 19:34:28,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:28,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:28,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:28,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 19:34:28,310 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:28,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:28,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1491633115, now seen corresponding path program 1 times [2024-06-27 19:34:28,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:28,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723989646] [2024-06-27 19:34:28,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:28,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:28,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:28,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:28,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:28,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723989646] [2024-06-27 19:34:28,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723989646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:28,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:28,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:34:28,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399210726] [2024-06-27 19:34:28,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:28,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:34:28,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:28,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:34:28,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:34:28,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:34:28,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 486 transitions, 8360 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:28,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:28,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:34:28,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:29,222 INFO L124 PetriNetUnfolderBase]: 2372/4055 cut-off events. [2024-06-27 19:34:29,222 INFO L125 PetriNetUnfolderBase]: For 424286/424286 co-relation queries the response was YES. [2024-06-27 19:34:29,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31291 conditions, 4055 events. 2372/4055 cut-off events. For 424286/424286 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 26083 event pairs, 408 based on Foata normal form. 1/4054 useless extension candidates. Maximal degree in co-relation 31120. Up to 3451 conditions per place. [2024-06-27 19:34:29,274 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 418 selfloop transitions, 102 changer transitions 0/528 dead transitions. [2024-06-27 19:34:29,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 528 transitions, 10048 flow [2024-06-27 19:34:29,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:34:29,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:34:29,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-27 19:34:29,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-27 19:34:29,276 INFO L175 Difference]: Start difference. First operand has 367 places, 486 transitions, 8360 flow. Second operand 9 states and 222 transitions. [2024-06-27 19:34:29,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 528 transitions, 10048 flow [2024-06-27 19:34:31,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 528 transitions, 9897 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-27 19:34:31,623 INFO L231 Difference]: Finished difference. Result has 369 places, 492 transitions, 8590 flow [2024-06-27 19:34:31,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8209, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8590, PETRI_PLACES=369, PETRI_TRANSITIONS=492} [2024-06-27 19:34:31,623 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 327 predicate places. [2024-06-27 19:34:31,624 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 492 transitions, 8590 flow [2024-06-27 19:34:31,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:31,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:31,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:31,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 19:34:31,624 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:31,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:31,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1580291131, now seen corresponding path program 1 times [2024-06-27 19:34:31,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:31,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247921276] [2024-06-27 19:34:31,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:31,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:31,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:31,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:31,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:31,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247921276] [2024-06-27 19:34:31,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247921276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:31,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:31,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:34:31,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459603409] [2024-06-27 19:34:31,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:31,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:34:31,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:31,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:34:31,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:34:31,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:34:31,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 492 transitions, 8590 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:31,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:31,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:34:31,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:32,591 INFO L124 PetriNetUnfolderBase]: 2452/4193 cut-off events. [2024-06-27 19:34:32,592 INFO L125 PetriNetUnfolderBase]: For 462269/462269 co-relation queries the response was YES. [2024-06-27 19:34:32,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32596 conditions, 4193 events. 2452/4193 cut-off events. For 462269/462269 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 27108 event pairs, 351 based on Foata normal form. 6/4197 useless extension candidates. Maximal degree in co-relation 32423. Up to 3483 conditions per place. [2024-06-27 19:34:32,654 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 477 selfloop transitions, 48 changer transitions 0/533 dead transitions. [2024-06-27 19:34:32,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 533 transitions, 10054 flow [2024-06-27 19:34:32,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:34:32,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:34:32,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-27 19:34:32,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 19:34:32,655 INFO L175 Difference]: Start difference. First operand has 369 places, 492 transitions, 8590 flow. Second operand 8 states and 200 transitions. [2024-06-27 19:34:32,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 533 transitions, 10054 flow [2024-06-27 19:34:34,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 533 transitions, 9685 flow, removed 70 selfloop flow, removed 5 redundant places. [2024-06-27 19:34:34,950 INFO L231 Difference]: Finished difference. Result has 373 places, 496 transitions, 8397 flow [2024-06-27 19:34:34,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8221, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8397, PETRI_PLACES=373, PETRI_TRANSITIONS=496} [2024-06-27 19:34:34,950 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 331 predicate places. [2024-06-27 19:34:34,950 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 496 transitions, 8397 flow [2024-06-27 19:34:34,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:34,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:34,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:34,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 19:34:34,952 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:34,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:34,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1314593851, now seen corresponding path program 2 times [2024-06-27 19:34:34,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:34,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224358398] [2024-06-27 19:34:34,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:34,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:34,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:35,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:35,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:35,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224358398] [2024-06-27 19:34:35,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224358398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:35,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:35,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:34:35,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114005851] [2024-06-27 19:34:35,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:35,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:34:35,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:35,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:34:35,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:34:35,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:34:35,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 496 transitions, 8397 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:35,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:35,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:34:35,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:35,868 INFO L124 PetriNetUnfolderBase]: 2518/4303 cut-off events. [2024-06-27 19:34:35,868 INFO L125 PetriNetUnfolderBase]: For 470120/470120 co-relation queries the response was YES. [2024-06-27 19:34:35,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33469 conditions, 4303 events. 2518/4303 cut-off events. For 470120/470120 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 28010 event pairs, 437 based on Foata normal form. 6/4307 useless extension candidates. Maximal degree in co-relation 33295. Up to 3728 conditions per place. [2024-06-27 19:34:35,922 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 480 selfloop transitions, 50 changer transitions 0/538 dead transitions. [2024-06-27 19:34:35,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 538 transitions, 9779 flow [2024-06-27 19:34:35,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:34:35,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:34:35,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-27 19:34:35,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-27 19:34:35,923 INFO L175 Difference]: Start difference. First operand has 373 places, 496 transitions, 8397 flow. Second operand 8 states and 196 transitions. [2024-06-27 19:34:35,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 538 transitions, 9779 flow [2024-06-27 19:34:37,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 538 transitions, 9645 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 19:34:37,997 INFO L231 Difference]: Finished difference. Result has 377 places, 505 transitions, 8544 flow [2024-06-27 19:34:37,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8276, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8544, PETRI_PLACES=377, PETRI_TRANSITIONS=505} [2024-06-27 19:34:37,998 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 335 predicate places. [2024-06-27 19:34:37,998 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 505 transitions, 8544 flow [2024-06-27 19:34:37,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:37,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:37,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:37,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 19:34:37,998 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:37,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:37,999 INFO L85 PathProgramCache]: Analyzing trace with hash -533776097, now seen corresponding path program 3 times [2024-06-27 19:34:37,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:37,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821445316] [2024-06-27 19:34:37,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:37,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:38,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:38,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:38,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:38,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821445316] [2024-06-27 19:34:38,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821445316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:38,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:38,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:34:38,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334013460] [2024-06-27 19:34:38,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:38,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:34:38,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:38,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:34:38,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:34:38,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:34:38,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 505 transitions, 8544 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:38,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:38,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:34:38,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:38,928 INFO L124 PetriNetUnfolderBase]: 2547/4344 cut-off events. [2024-06-27 19:34:38,928 INFO L125 PetriNetUnfolderBase]: For 469506/469520 co-relation queries the response was YES. [2024-06-27 19:34:38,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34119 conditions, 4344 events. 2547/4344 cut-off events. For 469506/469520 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 28284 event pairs, 460 based on Foata normal form. 2/4340 useless extension candidates. Maximal degree in co-relation 33944. Up to 3432 conditions per place. [2024-06-27 19:34:38,983 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 358 selfloop transitions, 180 changer transitions 0/546 dead transitions. [2024-06-27 19:34:38,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 546 transitions, 10386 flow [2024-06-27 19:34:38,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:34:38,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:34:38,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-27 19:34:38,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6128048780487805 [2024-06-27 19:34:38,984 INFO L175 Difference]: Start difference. First operand has 377 places, 505 transitions, 8544 flow. Second operand 8 states and 201 transitions. [2024-06-27 19:34:38,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 546 transitions, 10386 flow [2024-06-27 19:34:41,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 546 transitions, 10282 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 19:34:41,292 INFO L231 Difference]: Finished difference. Result has 381 places, 517 transitions, 9062 flow [2024-06-27 19:34:41,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8440, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9062, PETRI_PLACES=381, PETRI_TRANSITIONS=517} [2024-06-27 19:34:41,293 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 339 predicate places. [2024-06-27 19:34:41,293 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 517 transitions, 9062 flow [2024-06-27 19:34:41,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:41,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:41,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:41,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 19:34:41,294 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:41,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:41,294 INFO L85 PathProgramCache]: Analyzing trace with hash -533655941, now seen corresponding path program 2 times [2024-06-27 19:34:41,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:41,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465237480] [2024-06-27 19:34:41,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:41,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:41,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:41,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:41,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:41,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465237480] [2024-06-27 19:34:41,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465237480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:41,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:41,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:34:41,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110631088] [2024-06-27 19:34:41,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:41,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:34:41,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:41,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:34:41,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:34:41,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:34:41,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 517 transitions, 9062 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:41,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:41,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:34:41,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:42,187 INFO L124 PetriNetUnfolderBase]: 2560/4365 cut-off events. [2024-06-27 19:34:42,187 INFO L125 PetriNetUnfolderBase]: For 486419/486435 co-relation queries the response was YES. [2024-06-27 19:34:42,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34821 conditions, 4365 events. 2560/4365 cut-off events. For 486419/486435 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 28419 event pairs, 464 based on Foata normal form. 2/4361 useless extension candidates. Maximal degree in co-relation 34645. Up to 3131 conditions per place. [2024-06-27 19:34:42,245 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 268 selfloop transitions, 278 changer transitions 0/554 dead transitions. [2024-06-27 19:34:42,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 554 transitions, 11134 flow [2024-06-27 19:34:42,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:34:42,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:34:42,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-27 19:34:42,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-27 19:34:42,246 INFO L175 Difference]: Start difference. First operand has 381 places, 517 transitions, 9062 flow. Second operand 8 states and 202 transitions. [2024-06-27 19:34:42,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 554 transitions, 11134 flow [2024-06-27 19:34:44,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 554 transitions, 10652 flow, removed 64 selfloop flow, removed 5 redundant places. [2024-06-27 19:34:44,602 INFO L231 Difference]: Finished difference. Result has 386 places, 526 transitions, 9607 flow [2024-06-27 19:34:44,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8580, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9607, PETRI_PLACES=386, PETRI_TRANSITIONS=526} [2024-06-27 19:34:44,602 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 344 predicate places. [2024-06-27 19:34:44,603 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 526 transitions, 9607 flow [2024-06-27 19:34:44,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:44,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:44,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:44,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 19:34:44,603 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:44,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:44,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1290852483, now seen corresponding path program 4 times [2024-06-27 19:34:44,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:44,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690250592] [2024-06-27 19:34:44,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:44,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:44,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:44,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:44,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:44,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690250592] [2024-06-27 19:34:44,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690250592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:44,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:44,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:34:44,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931556056] [2024-06-27 19:34:44,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:44,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:34:44,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:44,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:34:44,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:34:44,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:34:44,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 526 transitions, 9607 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:44,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:44,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:34:44,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:45,542 INFO L124 PetriNetUnfolderBase]: 2565/4376 cut-off events. [2024-06-27 19:34:45,543 INFO L125 PetriNetUnfolderBase]: For 498726/498742 co-relation queries the response was YES. [2024-06-27 19:34:45,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35923 conditions, 4376 events. 2565/4376 cut-off events. For 498726/498742 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 28563 event pairs, 460 based on Foata normal form. 2/4372 useless extension candidates. Maximal degree in co-relation 35744. Up to 3456 conditions per place. [2024-06-27 19:34:45,601 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 364 selfloop transitions, 182 changer transitions 0/554 dead transitions. [2024-06-27 19:34:45,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 554 transitions, 11032 flow [2024-06-27 19:34:45,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:34:45,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:34:45,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-27 19:34:45,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-27 19:34:45,602 INFO L175 Difference]: Start difference. First operand has 386 places, 526 transitions, 9607 flow. Second operand 8 states and 196 transitions. [2024-06-27 19:34:45,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 554 transitions, 11032 flow [2024-06-27 19:34:48,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 554 transitions, 10801 flow, removed 62 selfloop flow, removed 3 redundant places. [2024-06-27 19:34:48,013 INFO L231 Difference]: Finished difference. Result has 391 places, 529 transitions, 9787 flow [2024-06-27 19:34:48,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9376, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9787, PETRI_PLACES=391, PETRI_TRANSITIONS=529} [2024-06-27 19:34:48,013 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 349 predicate places. [2024-06-27 19:34:48,013 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 529 transitions, 9787 flow [2024-06-27 19:34:48,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:48,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:48,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:48,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 19:34:48,014 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:48,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:48,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1173546649, now seen corresponding path program 5 times [2024-06-27 19:34:48,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:48,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186517184] [2024-06-27 19:34:48,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:48,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:48,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:48,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:48,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:48,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186517184] [2024-06-27 19:34:48,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186517184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:48,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:48,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:34:48,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606593169] [2024-06-27 19:34:48,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:48,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:34:48,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:48,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:34:48,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:34:48,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:34:48,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 529 transitions, 9787 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:48,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:48,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:34:48,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:48,935 INFO L124 PetriNetUnfolderBase]: 2602/4436 cut-off events. [2024-06-27 19:34:48,935 INFO L125 PetriNetUnfolderBase]: For 528578/528586 co-relation queries the response was YES. [2024-06-27 19:34:48,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36366 conditions, 4436 events. 2602/4436 cut-off events. For 528578/528586 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 28960 event pairs, 455 based on Foata normal form. 2/4434 useless extension candidates. Maximal degree in co-relation 36185. Up to 3498 conditions per place. [2024-06-27 19:34:48,991 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 358 selfloop transitions, 205 changer transitions 0/571 dead transitions. [2024-06-27 19:34:48,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 571 transitions, 12024 flow [2024-06-27 19:34:48,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:34:48,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:34:48,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-27 19:34:48,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236933797909407 [2024-06-27 19:34:48,993 INFO L175 Difference]: Start difference. First operand has 391 places, 529 transitions, 9787 flow. Second operand 7 states and 179 transitions. [2024-06-27 19:34:48,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 571 transitions, 12024 flow [2024-06-27 19:34:51,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 571 transitions, 11774 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 19:34:52,002 INFO L231 Difference]: Finished difference. Result has 393 places, 544 transitions, 10334 flow [2024-06-27 19:34:52,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9552, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10334, PETRI_PLACES=393, PETRI_TRANSITIONS=544} [2024-06-27 19:34:52,002 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 351 predicate places. [2024-06-27 19:34:52,002 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 544 transitions, 10334 flow [2024-06-27 19:34:52,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:52,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:52,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:52,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 19:34:52,003 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:52,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:52,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1163071129, now seen corresponding path program 6 times [2024-06-27 19:34:52,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:52,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222116578] [2024-06-27 19:34:52,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:52,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:52,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:52,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:52,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:52,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222116578] [2024-06-27 19:34:52,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222116578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:52,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:52,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:34:52,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682556953] [2024-06-27 19:34:52,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:52,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:34:52,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:52,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:34:52,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:34:52,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:34:52,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 544 transitions, 10334 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:52,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:52,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:34:52,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:53,048 INFO L124 PetriNetUnfolderBase]: 2615/4458 cut-off events. [2024-06-27 19:34:53,049 INFO L125 PetriNetUnfolderBase]: For 547499/547507 co-relation queries the response was YES. [2024-06-27 19:34:53,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36855 conditions, 4458 events. 2615/4458 cut-off events. For 547499/547507 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 29198 event pairs, 455 based on Foata normal form. 2/4456 useless extension candidates. Maximal degree in co-relation 36673. Up to 3513 conditions per place. [2024-06-27 19:34:53,099 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 349 selfloop transitions, 216 changer transitions 0/573 dead transitions. [2024-06-27 19:34:53,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 573 transitions, 12338 flow [2024-06-27 19:34:53,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:34:53,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:34:53,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-27 19:34:53,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-27 19:34:53,100 INFO L175 Difference]: Start difference. First operand has 393 places, 544 transitions, 10334 flow. Second operand 7 states and 176 transitions. [2024-06-27 19:34:53,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 573 transitions, 12338 flow [2024-06-27 19:34:55,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 573 transitions, 11996 flow, removed 79 selfloop flow, removed 2 redundant places. [2024-06-27 19:34:55,476 INFO L231 Difference]: Finished difference. Result has 398 places, 550 transitions, 10582 flow [2024-06-27 19:34:55,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10026, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10582, PETRI_PLACES=398, PETRI_TRANSITIONS=550} [2024-06-27 19:34:55,476 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 356 predicate places. [2024-06-27 19:34:55,476 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 550 transitions, 10582 flow [2024-06-27 19:34:55,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:55,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:55,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:55,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 19:34:55,477 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:55,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:55,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1047601213, now seen corresponding path program 3 times [2024-06-27 19:34:55,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:55,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726661565] [2024-06-27 19:34:55,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:55,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:55,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:55,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:55,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:55,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726661565] [2024-06-27 19:34:55,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726661565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:55,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:55,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:34:55,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863046137] [2024-06-27 19:34:55,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:55,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:34:55,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:55,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:34:55,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:34:55,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:34:55,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 550 transitions, 10582 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:55,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:55,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:34:55,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:56,442 INFO L124 PetriNetUnfolderBase]: 2628/4471 cut-off events. [2024-06-27 19:34:56,442 INFO L125 PetriNetUnfolderBase]: For 565594/565610 co-relation queries the response was YES. [2024-06-27 19:34:56,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37163 conditions, 4471 events. 2628/4471 cut-off events. For 565594/565610 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 29190 event pairs, 462 based on Foata normal form. 2/4467 useless extension candidates. Maximal degree in co-relation 36980. Up to 3183 conditions per place. [2024-06-27 19:34:56,500 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 276 selfloop transitions, 297 changer transitions 0/581 dead transitions. [2024-06-27 19:34:56,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 581 transitions, 12634 flow [2024-06-27 19:34:56,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:34:56,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:34:56,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-27 19:34:56,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6067073170731707 [2024-06-27 19:34:56,501 INFO L175 Difference]: Start difference. First operand has 398 places, 550 transitions, 10582 flow. Second operand 8 states and 199 transitions. [2024-06-27 19:34:56,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 581 transitions, 12634 flow [2024-06-27 19:34:59,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 581 transitions, 12313 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-27 19:34:59,587 INFO L231 Difference]: Finished difference. Result has 403 places, 556 transitions, 10985 flow [2024-06-27 19:34:59,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10261, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=291, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10985, PETRI_PLACES=403, PETRI_TRANSITIONS=556} [2024-06-27 19:34:59,588 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 361 predicate places. [2024-06-27 19:34:59,588 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 556 transitions, 10985 flow [2024-06-27 19:34:59,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:59,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:59,588 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] [2024-06-27 19:34:59,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 19:34:59,589 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:59,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:59,589 INFO L85 PathProgramCache]: Analyzing trace with hash -208915007, now seen corresponding path program 7 times [2024-06-27 19:34:59,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:59,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134404056] [2024-06-27 19:34:59,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:59,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:59,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:59,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:59,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:59,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134404056] [2024-06-27 19:34:59,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134404056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:59,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:59,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:34:59,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498546780] [2024-06-27 19:34:59,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:59,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:34:59,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:59,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:34:59,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:34:59,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:34:59,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 556 transitions, 10985 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:59,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:59,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:34:59,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:00,600 INFO L124 PetriNetUnfolderBase]: 2625/4473 cut-off events. [2024-06-27 19:35:00,600 INFO L125 PetriNetUnfolderBase]: For 571488/571504 co-relation queries the response was YES. [2024-06-27 19:35:00,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37356 conditions, 4473 events. 2625/4473 cut-off events. For 571488/571504 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 29306 event pairs, 460 based on Foata normal form. 2/4469 useless extension candidates. Maximal degree in co-relation 37172. Up to 3528 conditions per place. [2024-06-27 19:35:00,655 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 367 selfloop transitions, 203 changer transitions 0/578 dead transitions. [2024-06-27 19:35:00,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 578 transitions, 12413 flow [2024-06-27 19:35:00,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:35:00,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:35:00,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-27 19:35:00,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-27 19:35:00,656 INFO L175 Difference]: Start difference. First operand has 403 places, 556 transitions, 10985 flow. Second operand 8 states and 193 transitions. [2024-06-27 19:35:00,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 578 transitions, 12413 flow [2024-06-27 19:35:03,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 578 transitions, 11844 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-27 19:35:03,505 INFO L231 Difference]: Finished difference. Result has 406 places, 556 transitions, 10828 flow [2024-06-27 19:35:03,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10416, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10828, PETRI_PLACES=406, PETRI_TRANSITIONS=556} [2024-06-27 19:35:03,507 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 364 predicate places. [2024-06-27 19:35:03,507 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 556 transitions, 10828 flow [2024-06-27 19:35:03,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:03,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:03,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:03,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 19:35:03,509 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:35:03,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:03,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1047779959, now seen corresponding path program 8 times [2024-06-27 19:35:03,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:03,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957006663] [2024-06-27 19:35:03,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:03,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:03,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:03,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:03,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:03,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957006663] [2024-06-27 19:35:03,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957006663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:03,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:03,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:35:03,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280362071] [2024-06-27 19:35:03,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:03,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:35:03,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:03,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:35:03,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:35:03,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:35:03,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 556 transitions, 10828 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:03,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:03,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:35:03,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:04,489 INFO L124 PetriNetUnfolderBase]: 2630/4480 cut-off events. [2024-06-27 19:35:04,489 INFO L125 PetriNetUnfolderBase]: For 579871/579887 co-relation queries the response was YES. [2024-06-27 19:35:04,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37293 conditions, 4480 events. 2630/4480 cut-off events. For 579871/579887 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 29322 event pairs, 460 based on Foata normal form. 2/4476 useless extension candidates. Maximal degree in co-relation 37108. Up to 3534 conditions per place. [2024-06-27 19:35:04,550 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 367 selfloop transitions, 206 changer transitions 0/581 dead transitions. [2024-06-27 19:35:04,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 581 transitions, 12320 flow [2024-06-27 19:35:04,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:35:04,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:35:04,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 19:35:04,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-27 19:35:04,551 INFO L175 Difference]: Start difference. First operand has 406 places, 556 transitions, 10828 flow. Second operand 8 states and 194 transitions. [2024-06-27 19:35:04,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 581 transitions, 12320 flow [2024-06-27 19:35:08,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 581 transitions, 11735 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 19:35:08,014 INFO L231 Difference]: Finished difference. Result has 407 places, 559 transitions, 10717 flow [2024-06-27 19:35:08,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10252, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10717, PETRI_PLACES=407, PETRI_TRANSITIONS=559} [2024-06-27 19:35:08,014 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 365 predicate places. [2024-06-27 19:35:08,015 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 559 transitions, 10717 flow [2024-06-27 19:35:08,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:08,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:08,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:08,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 19:35:08,015 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:35:08,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:08,016 INFO L85 PathProgramCache]: Analyzing trace with hash 2091647585, now seen corresponding path program 4 times [2024-06-27 19:35:08,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:08,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565448653] [2024-06-27 19:35:08,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:08,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:08,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:08,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:08,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:08,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565448653] [2024-06-27 19:35:08,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565448653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:08,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:08,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:35:08,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076434825] [2024-06-27 19:35:08,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:08,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:35:08,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:08,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:35:08,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:35:08,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:35:08,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 559 transitions, 10717 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:08,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:08,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:35:08,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:08,995 INFO L124 PetriNetUnfolderBase]: 2627/4475 cut-off events. [2024-06-27 19:35:08,995 INFO L125 PetriNetUnfolderBase]: For 577966/577982 co-relation queries the response was YES. [2024-06-27 19:35:09,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37143 conditions, 4475 events. 2627/4475 cut-off events. For 577966/577982 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 29347 event pairs, 462 based on Foata normal form. 2/4471 useless extension candidates. Maximal degree in co-relation 36957. Up to 3183 conditions per place. [2024-06-27 19:35:09,053 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 278 selfloop transitions, 297 changer transitions 0/583 dead transitions. [2024-06-27 19:35:09,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 583 transitions, 12439 flow [2024-06-27 19:35:09,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:35:09,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:35:09,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-27 19:35:09,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6067073170731707 [2024-06-27 19:35:09,054 INFO L175 Difference]: Start difference. First operand has 407 places, 559 transitions, 10717 flow. Second operand 8 states and 199 transitions. [2024-06-27 19:35:09,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 583 transitions, 12439 flow [2024-06-27 19:35:12,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 583 transitions, 12130 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-27 19:35:12,290 INFO L231 Difference]: Finished difference. Result has 410 places, 559 transitions, 11008 flow [2024-06-27 19:35:12,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10408, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=297, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11008, PETRI_PLACES=410, PETRI_TRANSITIONS=559} [2024-06-27 19:35:12,290 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 368 predicate places. [2024-06-27 19:35:12,290 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 559 transitions, 11008 flow [2024-06-27 19:35:12,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:12,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:12,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:12,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 19:35:12,291 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:35:12,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:12,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1899966113, now seen corresponding path program 5 times [2024-06-27 19:35:12,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:12,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239079668] [2024-06-27 19:35:12,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:12,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:12,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:12,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:12,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:12,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239079668] [2024-06-27 19:35:12,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239079668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:12,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:12,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:35:12,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059938432] [2024-06-27 19:35:12,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:12,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:35:12,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:12,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:35:12,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:35:12,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:35:12,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 559 transitions, 11008 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:12,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:12,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:35:12,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:13,342 INFO L124 PetriNetUnfolderBase]: 2648/4518 cut-off events. [2024-06-27 19:35:13,342 INFO L125 PetriNetUnfolderBase]: For 602502/602504 co-relation queries the response was YES. [2024-06-27 19:35:13,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37991 conditions, 4518 events. 2648/4518 cut-off events. For 602502/602504 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 29677 event pairs, 441 based on Foata normal form. 1/4517 useless extension candidates. Maximal degree in co-relation 37804. Up to 3889 conditions per place. [2024-06-27 19:35:13,403 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 496 selfloop transitions, 87 changer transitions 0/591 dead transitions. [2024-06-27 19:35:13,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 591 transitions, 12910 flow [2024-06-27 19:35:13,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:35:13,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:35:13,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 231 transitions. [2024-06-27 19:35:13,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634146341463414 [2024-06-27 19:35:13,405 INFO L175 Difference]: Start difference. First operand has 410 places, 559 transitions, 11008 flow. Second operand 10 states and 231 transitions. [2024-06-27 19:35:13,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 591 transitions, 12910 flow [2024-06-27 19:35:16,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 591 transitions, 12356 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 19:35:17,001 INFO L231 Difference]: Finished difference. Result has 415 places, 567 transitions, 10833 flow [2024-06-27 19:35:17,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10466, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10833, PETRI_PLACES=415, PETRI_TRANSITIONS=567} [2024-06-27 19:35:17,001 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 373 predicate places. [2024-06-27 19:35:17,002 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 567 transitions, 10833 flow [2024-06-27 19:35:17,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:17,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:17,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:17,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 19:35:17,002 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:35:17,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:17,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1671886217, now seen corresponding path program 9 times [2024-06-27 19:35:17,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:17,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985882246] [2024-06-27 19:35:17,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:17,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:17,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:17,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:17,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:17,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985882246] [2024-06-27 19:35:17,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985882246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:17,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:17,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:35:17,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089655769] [2024-06-27 19:35:17,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:17,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:35:17,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:17,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:35:17,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:35:17,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:35:17,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 567 transitions, 10833 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:17,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:17,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:35:17,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:17,960 INFO L124 PetriNetUnfolderBase]: 2645/4512 cut-off events. [2024-06-27 19:35:17,961 INFO L125 PetriNetUnfolderBase]: For 601433/601435 co-relation queries the response was YES. [2024-06-27 19:35:18,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37457 conditions, 4512 events. 2645/4512 cut-off events. For 601433/601435 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 29629 event pairs, 440 based on Foata normal form. 1/4511 useless extension candidates. Maximal degree in co-relation 37268. Up to 3970 conditions per place. [2024-06-27 19:35:18,022 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 532 selfloop transitions, 46 changer transitions 0/586 dead transitions. [2024-06-27 19:35:18,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 586 transitions, 12275 flow [2024-06-27 19:35:18,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:35:18,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:35:18,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-27 19:35:18,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-27 19:35:18,023 INFO L175 Difference]: Start difference. First operand has 415 places, 567 transitions, 10833 flow. Second operand 8 states and 186 transitions. [2024-06-27 19:35:18,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 586 transitions, 12275 flow [2024-06-27 19:35:21,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 586 transitions, 12126 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-27 19:35:21,132 INFO L231 Difference]: Finished difference. Result has 417 places, 567 transitions, 10782 flow [2024-06-27 19:35:21,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10684, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10782, PETRI_PLACES=417, PETRI_TRANSITIONS=567} [2024-06-27 19:35:21,133 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 375 predicate places. [2024-06-27 19:35:21,133 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 567 transitions, 10782 flow [2024-06-27 19:35:21,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:21,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:21,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:21,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 19:35:21,134 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:35:21,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:21,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1672064963, now seen corresponding path program 6 times [2024-06-27 19:35:21,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:21,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748188152] [2024-06-27 19:35:21,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:21,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:21,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:21,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:21,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:21,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748188152] [2024-06-27 19:35:21,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748188152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:21,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:21,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:35:21,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501767040] [2024-06-27 19:35:21,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:21,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:35:21,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:21,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:35:21,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:35:21,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:35:21,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 567 transitions, 10782 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:21,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:21,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:35:21,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:22,154 INFO L124 PetriNetUnfolderBase]: 2650/4521 cut-off events. [2024-06-27 19:35:22,155 INFO L125 PetriNetUnfolderBase]: For 610245/610247 co-relation queries the response was YES. [2024-06-27 19:35:22,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37637 conditions, 4521 events. 2650/4521 cut-off events. For 610245/610247 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 29741 event pairs, 441 based on Foata normal form. 1/4520 useless extension candidates. Maximal degree in co-relation 37446. Up to 3891 conditions per place. [2024-06-27 19:35:22,216 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 495 selfloop transitions, 90 changer transitions 0/593 dead transitions. [2024-06-27 19:35:22,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 593 transitions, 12609 flow [2024-06-27 19:35:22,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:35:22,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:35:22,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-27 19:35:22,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5745257452574526 [2024-06-27 19:35:22,217 INFO L175 Difference]: Start difference. First operand has 417 places, 567 transitions, 10782 flow. Second operand 9 states and 212 transitions. [2024-06-27 19:35:22,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 593 transitions, 12609 flow [2024-06-27 19:35:26,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 593 transitions, 12515 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 19:35:26,023 INFO L231 Difference]: Finished difference. Result has 420 places, 571 transitions, 10996 flow [2024-06-27 19:35:26,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10688, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10996, PETRI_PLACES=420, PETRI_TRANSITIONS=571} [2024-06-27 19:35:26,023 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 378 predicate places. [2024-06-27 19:35:26,023 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 571 transitions, 10996 flow [2024-06-27 19:35:26,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:26,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:26,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:26,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 19:35:26,024 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:35:26,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:26,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1671679013, now seen corresponding path program 7 times [2024-06-27 19:35:26,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:26,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248458816] [2024-06-27 19:35:26,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:26,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:26,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:26,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:26,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:26,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248458816] [2024-06-27 19:35:26,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248458816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:26,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:26,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:35:26,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254460461] [2024-06-27 19:35:26,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:26,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:35:26,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:26,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:35:26,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:35:26,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:35:26,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 571 transitions, 10996 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:26,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:26,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:35:26,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:27,059 INFO L124 PetriNetUnfolderBase]: 2647/4517 cut-off events. [2024-06-27 19:35:27,059 INFO L125 PetriNetUnfolderBase]: For 613114/613116 co-relation queries the response was YES. [2024-06-27 19:35:27,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37655 conditions, 4517 events. 2647/4517 cut-off events. For 613114/613116 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 29723 event pairs, 441 based on Foata normal form. 1/4516 useless extension candidates. Maximal degree in co-relation 37463. Up to 3889 conditions per place. [2024-06-27 19:35:27,119 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 494 selfloop transitions, 90 changer transitions 0/592 dead transitions. [2024-06-27 19:35:27,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 592 transitions, 12469 flow [2024-06-27 19:35:27,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:35:27,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:35:27,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-27 19:35:27,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5718157181571816 [2024-06-27 19:35:27,120 INFO L175 Difference]: Start difference. First operand has 420 places, 571 transitions, 10996 flow. Second operand 9 states and 211 transitions. [2024-06-27 19:35:27,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 592 transitions, 12469 flow [2024-06-27 19:35:30,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 592 transitions, 12310 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-27 19:35:30,909 INFO L231 Difference]: Finished difference. Result has 425 places, 571 transitions, 11023 flow [2024-06-27 19:35:30,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10837, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11023, PETRI_PLACES=425, PETRI_TRANSITIONS=571} [2024-06-27 19:35:30,910 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 383 predicate places. [2024-06-27 19:35:30,910 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 571 transitions, 11023 flow [2024-06-27 19:35:30,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:30,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:30,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:30,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 19:35:30,911 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:35:30,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:30,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1671678827, now seen corresponding path program 10 times [2024-06-27 19:35:30,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:30,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451358768] [2024-06-27 19:35:30,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:30,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:30,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:31,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:31,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:31,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451358768] [2024-06-27 19:35:31,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451358768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:31,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:31,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:35:31,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032312815] [2024-06-27 19:35:31,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:31,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:35:31,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:31,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:35:31,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:35:31,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:35:31,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 571 transitions, 11023 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:31,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:31,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:35:31,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:32,033 INFO L124 PetriNetUnfolderBase]: 2644/4513 cut-off events. [2024-06-27 19:35:32,033 INFO L125 PetriNetUnfolderBase]: For 614588/614590 co-relation queries the response was YES. [2024-06-27 19:35:32,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37685 conditions, 4513 events. 2644/4513 cut-off events. For 614588/614590 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 29653 event pairs, 440 based on Foata normal form. 1/4512 useless extension candidates. Maximal degree in co-relation 37491. Up to 3970 conditions per place. [2024-06-27 19:35:32,087 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 536 selfloop transitions, 46 changer transitions 0/590 dead transitions. [2024-06-27 19:35:32,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 590 transitions, 12243 flow [2024-06-27 19:35:32,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:35:32,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:35:32,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-27 19:35:32,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528455284552846 [2024-06-27 19:35:32,089 INFO L175 Difference]: Start difference. First operand has 425 places, 571 transitions, 11023 flow. Second operand 9 states and 204 transitions. [2024-06-27 19:35:32,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 590 transitions, 12243 flow [2024-06-27 19:35:36,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 590 transitions, 12051 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 19:35:36,134 INFO L231 Difference]: Finished difference. Result has 426 places, 571 transitions, 10929 flow [2024-06-27 19:35:36,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10831, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10929, PETRI_PLACES=426, PETRI_TRANSITIONS=571} [2024-06-27 19:35:36,134 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 384 predicate places. [2024-06-27 19:35:36,134 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 571 transitions, 10929 flow [2024-06-27 19:35:36,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:36,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:36,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:36,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 19:35:36,135 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:35:36,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:36,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1931917797, now seen corresponding path program 3 times [2024-06-27 19:35:36,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:36,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860011851] [2024-06-27 19:35:36,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:36,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:36,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:36,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:36,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:36,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860011851] [2024-06-27 19:35:36,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860011851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:36,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:36,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:35:36,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017134501] [2024-06-27 19:35:36,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:36,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:35:36,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:36,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:35:36,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:35:36,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:35:36,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 571 transitions, 10929 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:36,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:36,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:35:36,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:37,200 INFO L124 PetriNetUnfolderBase]: 2672/4561 cut-off events. [2024-06-27 19:35:37,201 INFO L125 PetriNetUnfolderBase]: For 659045/659047 co-relation queries the response was YES. [2024-06-27 19:35:37,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37944 conditions, 4561 events. 2672/4561 cut-off events. For 659045/659047 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 30055 event pairs, 441 based on Foata normal form. 6/4565 useless extension candidates. Maximal degree in co-relation 37749. Up to 3947 conditions per place. [2024-06-27 19:35:37,265 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 545 selfloop transitions, 48 changer transitions 0/601 dead transitions. [2024-06-27 19:35:37,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 601 transitions, 12302 flow [2024-06-27 19:35:37,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:35:37,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:35:37,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-27 19:35:37,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-27 19:35:37,266 INFO L175 Difference]: Start difference. First operand has 426 places, 571 transitions, 10929 flow. Second operand 8 states and 191 transitions. [2024-06-27 19:35:37,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 601 transitions, 12302 flow [2024-06-27 19:35:41,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 601 transitions, 12200 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 19:35:41,332 INFO L231 Difference]: Finished difference. Result has 428 places, 575 transitions, 11016 flow [2024-06-27 19:35:41,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10829, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11016, PETRI_PLACES=428, PETRI_TRANSITIONS=575} [2024-06-27 19:35:41,336 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 386 predicate places. [2024-06-27 19:35:41,336 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 575 transitions, 11016 flow [2024-06-27 19:35:41,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:41,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:41,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:41,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 19:35:41,337 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:35:41,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:41,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1165920153, now seen corresponding path program 1 times [2024-06-27 19:35:41,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:41,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549935229] [2024-06-27 19:35:41,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:41,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:41,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:41,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:41,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:41,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549935229] [2024-06-27 19:35:41,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549935229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:41,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:41,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:35:41,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429842307] [2024-06-27 19:35:41,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:41,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:35:41,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:41,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:35:41,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:35:41,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:35:41,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 575 transitions, 11016 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:41,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:41,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:35:41,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:42,401 INFO L124 PetriNetUnfolderBase]: 2693/4588 cut-off events. [2024-06-27 19:35:42,401 INFO L125 PetriNetUnfolderBase]: For 660293/660299 co-relation queries the response was YES. [2024-06-27 19:35:42,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38542 conditions, 4588 events. 2693/4588 cut-off events. For 660293/660299 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 30253 event pairs, 462 based on Foata normal form. 3/4585 useless extension candidates. Maximal degree in co-relation 38344. Up to 3891 conditions per place. [2024-06-27 19:35:42,468 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 502 selfloop transitions, 97 changer transitions 0/607 dead transitions. [2024-06-27 19:35:42,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 607 transitions, 12592 flow [2024-06-27 19:35:42,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:35:42,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:35:42,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 19:35:42,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 19:35:42,469 INFO L175 Difference]: Start difference. First operand has 428 places, 575 transitions, 11016 flow. Second operand 7 states and 175 transitions. [2024-06-27 19:35:42,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 607 transitions, 12592 flow [2024-06-27 19:35:46,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 607 transitions, 12497 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-27 19:35:46,345 INFO L231 Difference]: Finished difference. Result has 432 places, 579 transitions, 11172 flow [2024-06-27 19:35:46,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10921, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11172, PETRI_PLACES=432, PETRI_TRANSITIONS=579} [2024-06-27 19:35:46,345 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 390 predicate places. [2024-06-27 19:35:46,345 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 579 transitions, 11172 flow [2024-06-27 19:35:46,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:46,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:46,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:46,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-27 19:35:46,346 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:35:46,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:46,346 INFO L85 PathProgramCache]: Analyzing trace with hash 86323003, now seen corresponding path program 2 times [2024-06-27 19:35:46,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:46,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202608609] [2024-06-27 19:35:46,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:46,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:46,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:46,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:46,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:46,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202608609] [2024-06-27 19:35:46,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202608609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:46,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:46,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:35:46,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045409232] [2024-06-27 19:35:46,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:46,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:35:46,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:46,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:35:46,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:35:46,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:35:46,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 579 transitions, 11172 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:46,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:46,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:35:46,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:47,390 INFO L124 PetriNetUnfolderBase]: 2701/4607 cut-off events. [2024-06-27 19:35:47,391 INFO L125 PetriNetUnfolderBase]: For 671030/671036 co-relation queries the response was YES. [2024-06-27 19:35:47,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38845 conditions, 4607 events. 2701/4607 cut-off events. For 671030/671036 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 30449 event pairs, 471 based on Foata normal form. 3/4606 useless extension candidates. Maximal degree in co-relation 38646. Up to 3950 conditions per place. [2024-06-27 19:35:47,453 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 500 selfloop transitions, 96 changer transitions 0/604 dead transitions. [2024-06-27 19:35:47,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 604 transitions, 12468 flow [2024-06-27 19:35:47,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:35:47,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:35:47,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-27 19:35:47,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-27 19:35:47,454 INFO L175 Difference]: Start difference. First operand has 432 places, 579 transitions, 11172 flow. Second operand 7 states and 170 transitions. [2024-06-27 19:35:47,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 604 transitions, 12468 flow [2024-06-27 19:35:50,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 604 transitions, 12314 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-27 19:35:50,745 INFO L231 Difference]: Finished difference. Result has 436 places, 581 transitions, 11247 flow [2024-06-27 19:35:50,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11030, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11247, PETRI_PLACES=436, PETRI_TRANSITIONS=581} [2024-06-27 19:35:50,746 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 394 predicate places. [2024-06-27 19:35:50,746 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 581 transitions, 11247 flow [2024-06-27 19:35:50,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:50,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:50,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:50,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-27 19:35:50,747 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:35:50,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:50,747 INFO L85 PathProgramCache]: Analyzing trace with hash 2031529767, now seen corresponding path program 3 times [2024-06-27 19:35:50,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:50,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187111208] [2024-06-27 19:35:50,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:50,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:50,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:50,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:50,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:50,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187111208] [2024-06-27 19:35:50,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187111208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:50,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:50,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:35:50,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580943951] [2024-06-27 19:35:50,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:50,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:35:50,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:50,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:35:50,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:35:50,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:35:50,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 581 transitions, 11247 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:50,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:50,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:35:50,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:51,799 INFO L124 PetriNetUnfolderBase]: 2709/4612 cut-off events. [2024-06-27 19:35:51,799 INFO L125 PetriNetUnfolderBase]: For 679815/679823 co-relation queries the response was YES. [2024-06-27 19:35:51,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39098 conditions, 4612 events. 2709/4612 cut-off events. For 679815/679823 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 30452 event pairs, 468 based on Foata normal form. 3/4610 useless extension candidates. Maximal degree in co-relation 38897. Up to 3962 conditions per place. [2024-06-27 19:35:51,862 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 506 selfloop transitions, 93 changer transitions 0/607 dead transitions. [2024-06-27 19:35:51,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 607 transitions, 12543 flow [2024-06-27 19:35:51,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:35:51,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:35:51,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-27 19:35:51,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-27 19:35:51,863 INFO L175 Difference]: Start difference. First operand has 436 places, 581 transitions, 11247 flow. Second operand 8 states and 189 transitions. [2024-06-27 19:35:51,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 607 transitions, 12543 flow [2024-06-27 19:35:55,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 607 transitions, 12379 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 19:35:55,798 INFO L231 Difference]: Finished difference. Result has 440 places, 583 transitions, 11298 flow [2024-06-27 19:35:55,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11083, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11298, PETRI_PLACES=440, PETRI_TRANSITIONS=583} [2024-06-27 19:35:55,798 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 398 predicate places. [2024-06-27 19:35:55,798 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 583 transitions, 11298 flow [2024-06-27 19:35:55,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:55,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:55,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:55,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-27 19:35:55,799 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:35:55,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:55,799 INFO L85 PathProgramCache]: Analyzing trace with hash -965711339, now seen corresponding path program 1 times [2024-06-27 19:35:55,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:55,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883138731] [2024-06-27 19:35:55,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:55,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:55,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:55,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:55,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:55,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883138731] [2024-06-27 19:35:55,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883138731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:55,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:55,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:35:55,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403805594] [2024-06-27 19:35:55,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:55,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:35:55,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:55,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:35:55,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:35:55,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:35:55,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 583 transitions, 11298 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:55,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:55,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:35:55,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:56,891 INFO L124 PetriNetUnfolderBase]: 2717/4624 cut-off events. [2024-06-27 19:35:56,892 INFO L125 PetriNetUnfolderBase]: For 691768/691776 co-relation queries the response was YES. [2024-06-27 19:35:56,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39360 conditions, 4624 events. 2717/4624 cut-off events. For 691768/691776 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 30454 event pairs, 475 based on Foata normal form. 3/4622 useless extension candidates. Maximal degree in co-relation 39158. Up to 3836 conditions per place. [2024-06-27 19:35:56,952 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 413 selfloop transitions, 188 changer transitions 0/609 dead transitions. [2024-06-27 19:35:56,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 609 transitions, 12644 flow [2024-06-27 19:35:56,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:35:56,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:35:56,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-27 19:35:56,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-27 19:35:56,954 INFO L175 Difference]: Start difference. First operand has 440 places, 583 transitions, 11298 flow. Second operand 8 states and 192 transitions. [2024-06-27 19:35:56,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 609 transitions, 12644 flow [2024-06-27 19:36:01,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 609 transitions, 12464 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 19:36:01,344 INFO L231 Difference]: Finished difference. Result has 443 places, 585 transitions, 11569 flow [2024-06-27 19:36:01,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11118, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11569, PETRI_PLACES=443, PETRI_TRANSITIONS=585} [2024-06-27 19:36:01,344 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 401 predicate places. [2024-06-27 19:36:01,345 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 585 transitions, 11569 flow [2024-06-27 19:36:01,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:01,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:01,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:36:01,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-27 19:36:01,345 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:36:01,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:01,345 INFO L85 PathProgramCache]: Analyzing trace with hash -800256903, now seen corresponding path program 4 times [2024-06-27 19:36:01,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:01,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080621089] [2024-06-27 19:36:01,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:01,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:01,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:01,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:36:01,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:01,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080621089] [2024-06-27 19:36:01,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080621089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:01,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:01,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:36:01,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456353740] [2024-06-27 19:36:01,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:01,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:36:01,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:01,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:36:01,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:36:01,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:36:01,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 585 transitions, 11569 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:01,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:01,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:36:01,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:02,458 INFO L124 PetriNetUnfolderBase]: 2753/4686 cut-off events. [2024-06-27 19:36:02,458 INFO L125 PetriNetUnfolderBase]: For 699988/699990 co-relation queries the response was YES. [2024-06-27 19:36:02,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39971 conditions, 4686 events. 2753/4686 cut-off events. For 699988/699990 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 30924 event pairs, 451 based on Foata normal form. 2/4686 useless extension candidates. Maximal degree in co-relation 39768. Up to 4108 conditions per place. [2024-06-27 19:36:02,522 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 561 selfloop transitions, 41 changer transitions 0/610 dead transitions. [2024-06-27 19:36:02,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 610 transitions, 12890 flow [2024-06-27 19:36:02,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:36:02,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:36:02,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-27 19:36:02,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-27 19:36:02,523 INFO L175 Difference]: Start difference. First operand has 443 places, 585 transitions, 11569 flow. Second operand 8 states and 188 transitions. [2024-06-27 19:36:02,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 610 transitions, 12890 flow [2024-06-27 19:36:06,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 610 transitions, 12471 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-27 19:36:06,849 INFO L231 Difference]: Finished difference. Result has 445 places, 588 transitions, 11279 flow [2024-06-27 19:36:06,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11150, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11279, PETRI_PLACES=445, PETRI_TRANSITIONS=588} [2024-06-27 19:36:06,850 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 403 predicate places. [2024-06-27 19:36:06,850 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 588 transitions, 11279 flow [2024-06-27 19:36:06,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:06,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:06,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:36:06,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-27 19:36:06,850 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:36:06,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:06,851 INFO L85 PathProgramCache]: Analyzing trace with hash -881948191, now seen corresponding path program 2 times [2024-06-27 19:36:06,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:06,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469947052] [2024-06-27 19:36:06,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:06,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:06,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:06,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:36:06,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:06,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469947052] [2024-06-27 19:36:06,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469947052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:06,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:06,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:36:06,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260619355] [2024-06-27 19:36:06,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:06,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:36:06,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:06,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:36:06,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:36:06,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:36:06,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 588 transitions, 11279 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:06,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:06,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:36:06,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:07,991 INFO L124 PetriNetUnfolderBase]: 2789/4742 cut-off events. [2024-06-27 19:36:07,991 INFO L125 PetriNetUnfolderBase]: For 776453/776455 co-relation queries the response was YES. [2024-06-27 19:36:08,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40383 conditions, 4742 events. 2789/4742 cut-off events. For 776453/776455 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 31290 event pairs, 456 based on Foata normal form. 10/4750 useless extension candidates. Maximal degree in co-relation 40179. Up to 4106 conditions per place. [2024-06-27 19:36:08,059 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 527 selfloop transitions, 78 changer transitions 0/613 dead transitions. [2024-06-27 19:36:08,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 613 transitions, 12649 flow [2024-06-27 19:36:08,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:36:08,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:36:08,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-27 19:36:08,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-27 19:36:08,060 INFO L175 Difference]: Start difference. First operand has 445 places, 588 transitions, 11279 flow. Second operand 9 states and 213 transitions. [2024-06-27 19:36:08,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 613 transitions, 12649 flow [2024-06-27 19:36:11,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 613 transitions, 12557 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 19:36:11,367 INFO L231 Difference]: Finished difference. Result has 448 places, 590 transitions, 11424 flow [2024-06-27 19:36:11,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11187, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11424, PETRI_PLACES=448, PETRI_TRANSITIONS=590} [2024-06-27 19:36:11,367 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 406 predicate places. [2024-06-27 19:36:11,368 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 590 transitions, 11424 flow [2024-06-27 19:36:11,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:11,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:11,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:36:11,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-27 19:36:11,368 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:36:11,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:11,369 INFO L85 PathProgramCache]: Analyzing trace with hash -36619739, now seen corresponding path program 3 times [2024-06-27 19:36:11,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:11,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429187330] [2024-06-27 19:36:11,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:11,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:11,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:11,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:36:11,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:11,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429187330] [2024-06-27 19:36:11,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429187330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:11,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:11,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:36:11,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111805371] [2024-06-27 19:36:11,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:11,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:36:11,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:11,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:36:11,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:36:11,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:36:11,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 590 transitions, 11424 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:11,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:11,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:36:11,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:12,615 INFO L124 PetriNetUnfolderBase]: 2825/4796 cut-off events. [2024-06-27 19:36:12,615 INFO L125 PetriNetUnfolderBase]: For 796091/796093 co-relation queries the response was YES. [2024-06-27 19:36:12,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41360 conditions, 4796 events. 2825/4796 cut-off events. For 796091/796093 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 31655 event pairs, 462 based on Foata normal form. 10/4804 useless extension candidates. Maximal degree in co-relation 41155. Up to 4162 conditions per place. [2024-06-27 19:36:12,683 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 530 selfloop transitions, 78 changer transitions 0/616 dead transitions. [2024-06-27 19:36:12,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 616 transitions, 12806 flow [2024-06-27 19:36:12,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:36:12,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:36:12,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 232 transitions. [2024-06-27 19:36:12,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5658536585365853 [2024-06-27 19:36:12,685 INFO L175 Difference]: Start difference. First operand has 448 places, 590 transitions, 11424 flow. Second operand 10 states and 232 transitions. [2024-06-27 19:36:12,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 616 transitions, 12806 flow [2024-06-27 19:36:17,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 616 transitions, 12595 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-27 19:36:17,211 INFO L231 Difference]: Finished difference. Result has 451 places, 592 transitions, 11454 flow [2024-06-27 19:36:17,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11213, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11454, PETRI_PLACES=451, PETRI_TRANSITIONS=592} [2024-06-27 19:36:17,211 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 409 predicate places. [2024-06-27 19:36:17,212 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 592 transitions, 11454 flow [2024-06-27 19:36:17,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:17,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:17,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:36:17,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-27 19:36:17,212 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:36:17,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:17,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1547344073, now seen corresponding path program 4 times [2024-06-27 19:36:17,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:17,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052158616] [2024-06-27 19:36:17,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:17,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:17,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:17,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:36:17,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:17,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052158616] [2024-06-27 19:36:17,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052158616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:17,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:17,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:36:17,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471026685] [2024-06-27 19:36:17,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:17,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:36:17,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:17,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:36:17,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:36:17,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:36:17,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 592 transitions, 11454 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:17,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:17,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:36:17,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:18,513 INFO L124 PetriNetUnfolderBase]: 3034/5141 cut-off events. [2024-06-27 19:36:18,513 INFO L125 PetriNetUnfolderBase]: For 1064436/1064438 co-relation queries the response was YES. [2024-06-27 19:36:18,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47385 conditions, 5141 events. 3034/5141 cut-off events. For 1064436/1064438 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 34099 event pairs, 559 based on Foata normal form. 10/5149 useless extension candidates. Maximal degree in co-relation 47179. Up to 3986 conditions per place. [2024-06-27 19:36:18,591 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 537 selfloop transitions, 82 changer transitions 0/627 dead transitions. [2024-06-27 19:36:18,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 627 transitions, 13198 flow [2024-06-27 19:36:18,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:36:18,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:36:18,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 238 transitions. [2024-06-27 19:36:18,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5804878048780487 [2024-06-27 19:36:18,592 INFO L175 Difference]: Start difference. First operand has 451 places, 592 transitions, 11454 flow. Second operand 10 states and 238 transitions. [2024-06-27 19:36:18,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 627 transitions, 13198 flow [2024-06-27 19:36:24,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 627 transitions, 12983 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-27 19:36:24,045 INFO L231 Difference]: Finished difference. Result has 454 places, 596 transitions, 11556 flow [2024-06-27 19:36:24,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11239, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11556, PETRI_PLACES=454, PETRI_TRANSITIONS=596} [2024-06-27 19:36:24,045 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 412 predicate places. [2024-06-27 19:36:24,045 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 596 transitions, 11556 flow [2024-06-27 19:36:24,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:24,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:24,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:36:24,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-27 19:36:24,046 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:36:24,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:24,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1585735447, now seen corresponding path program 11 times [2024-06-27 19:36:24,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:24,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463095089] [2024-06-27 19:36:24,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:24,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:24,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:24,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:36:24,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:24,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463095089] [2024-06-27 19:36:24,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463095089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:24,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:24,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:36:24,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070111421] [2024-06-27 19:36:24,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:24,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:36:24,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:24,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:36:24,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:36:24,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:36:24,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 596 transitions, 11556 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:24,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:24,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:36:24,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:25,267 INFO L124 PetriNetUnfolderBase]: 3039/5131 cut-off events. [2024-06-27 19:36:25,268 INFO L125 PetriNetUnfolderBase]: For 1031829/1031835 co-relation queries the response was YES. [2024-06-27 19:36:25,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47300 conditions, 5131 events. 3039/5131 cut-off events. For 1031829/1031835 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 34016 event pairs, 623 based on Foata normal form. 5/5117 useless extension candidates. Maximal degree in co-relation 47092. Up to 4172 conditions per place. [2024-06-27 19:36:25,343 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 402 selfloop transitions, 212 changer transitions 0/622 dead transitions. [2024-06-27 19:36:25,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 622 transitions, 13439 flow [2024-06-27 19:36:25,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:36:25,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:36:25,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-27 19:36:25,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-27 19:36:25,345 INFO L175 Difference]: Start difference. First operand has 454 places, 596 transitions, 11556 flow. Second operand 7 states and 174 transitions. [2024-06-27 19:36:25,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 622 transitions, 13439 flow [2024-06-27 19:36:31,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 622 transitions, 13274 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-27 19:36:31,877 INFO L231 Difference]: Finished difference. Result has 455 places, 599 transitions, 11891 flow [2024-06-27 19:36:31,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11391, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11891, PETRI_PLACES=455, PETRI_TRANSITIONS=599} [2024-06-27 19:36:31,878 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 413 predicate places. [2024-06-27 19:36:31,878 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 599 transitions, 11891 flow [2024-06-27 19:36:31,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:31,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:31,879 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] [2024-06-27 19:36:31,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-27 19:36:31,879 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:36:31,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:31,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1012634751, now seen corresponding path program 12 times [2024-06-27 19:36:31,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:31,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613559478] [2024-06-27 19:36:31,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:31,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:31,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:31,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:36:31,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:31,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613559478] [2024-06-27 19:36:31,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613559478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:31,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:31,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:36:31,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251118570] [2024-06-27 19:36:31,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:31,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:36:31,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:31,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:36:31,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:36:31,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:36:31,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 599 transitions, 11891 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:31,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:31,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:36:31,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:33,132 INFO L124 PetriNetUnfolderBase]: 3044/5156 cut-off events. [2024-06-27 19:36:33,133 INFO L125 PetriNetUnfolderBase]: For 1042348/1042354 co-relation queries the response was YES. [2024-06-27 19:36:33,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47443 conditions, 5156 events. 3044/5156 cut-off events. For 1042348/1042354 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 34305 event pairs, 635 based on Foata normal form. 5/5142 useless extension candidates. Maximal degree in co-relation 47233. Up to 4178 conditions per place. [2024-06-27 19:36:33,209 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 402 selfloop transitions, 212 changer transitions 0/622 dead transitions. [2024-06-27 19:36:33,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 622 transitions, 13772 flow [2024-06-27 19:36:33,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:36:33,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:36:33,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 19:36:33,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-27 19:36:33,211 INFO L175 Difference]: Start difference. First operand has 455 places, 599 transitions, 11891 flow. Second operand 7 states and 172 transitions. [2024-06-27 19:36:33,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 622 transitions, 13772 flow [2024-06-27 19:36:39,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 622 transitions, 12987 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-27 19:36:39,394 INFO L231 Difference]: Finished difference. Result has 456 places, 602 transitions, 11611 flow [2024-06-27 19:36:39,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11137, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11611, PETRI_PLACES=456, PETRI_TRANSITIONS=602} [2024-06-27 19:36:39,395 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 414 predicate places. [2024-06-27 19:36:39,395 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 602 transitions, 11611 flow [2024-06-27 19:36:39,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:39,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:39,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:36:39,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-27 19:36:39,395 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:36:39,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:39,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1171247207, now seen corresponding path program 13 times [2024-06-27 19:36:39,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:39,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103667582] [2024-06-27 19:36:39,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:39,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:39,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:39,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:36:39,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:39,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103667582] [2024-06-27 19:36:39,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103667582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:39,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:39,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:36:39,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59577880] [2024-06-27 19:36:39,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:39,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:36:39,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:39,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:36:39,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:36:39,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:36:39,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 602 transitions, 11611 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:39,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:39,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:36:39,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:40,594 INFO L124 PetriNetUnfolderBase]: 3049/5167 cut-off events. [2024-06-27 19:36:40,594 INFO L125 PetriNetUnfolderBase]: For 1049965/1049971 co-relation queries the response was YES. [2024-06-27 19:36:40,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47398 conditions, 5167 events. 3049/5167 cut-off events. For 1049965/1049971 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 34428 event pairs, 635 based on Foata normal form. 5/5153 useless extension candidates. Maximal degree in co-relation 47188. Up to 4184 conditions per place. [2024-06-27 19:36:40,670 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 386 selfloop transitions, 228 changer transitions 0/622 dead transitions. [2024-06-27 19:36:40,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 622 transitions, 13459 flow [2024-06-27 19:36:40,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:36:40,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:36:40,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-27 19:36:40,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-27 19:36:40,671 INFO L175 Difference]: Start difference. First operand has 456 places, 602 transitions, 11611 flow. Second operand 7 states and 168 transitions. [2024-06-27 19:36:40,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 622 transitions, 13459 flow [2024-06-27 19:36:46,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 622 transitions, 13048 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 19:36:46,071 INFO L231 Difference]: Finished difference. Result has 459 places, 605 transitions, 11712 flow [2024-06-27 19:36:46,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11203, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11712, PETRI_PLACES=459, PETRI_TRANSITIONS=605} [2024-06-27 19:36:46,072 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 417 predicate places. [2024-06-27 19:36:46,072 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 605 transitions, 11712 flow [2024-06-27 19:36:46,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:46,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:46,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:36:46,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-27 19:36:46,073 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:36:46,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:46,073 INFO L85 PathProgramCache]: Analyzing trace with hash -513686907, now seen corresponding path program 14 times [2024-06-27 19:36:46,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:46,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932868080] [2024-06-27 19:36:46,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:46,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:46,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:46,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:36:46,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:46,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932868080] [2024-06-27 19:36:46,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932868080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:46,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:46,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:36:46,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495745189] [2024-06-27 19:36:46,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:46,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:36:46,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:46,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:36:46,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:36:46,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:36:46,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 605 transitions, 11712 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:46,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:46,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:36:46,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:47,420 INFO L124 PetriNetUnfolderBase]: 3046/5144 cut-off events. [2024-06-27 19:36:47,420 INFO L125 PetriNetUnfolderBase]: For 1054171/1054171 co-relation queries the response was YES. [2024-06-27 19:36:47,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47359 conditions, 5144 events. 3046/5144 cut-off events. For 1054171/1054171 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 34147 event pairs, 653 based on Foata normal form. 1/5108 useless extension candidates. Maximal degree in co-relation 47148. Up to 4181 conditions per place. [2024-06-27 19:36:47,488 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 398 selfloop transitions, 226 changer transitions 0/632 dead transitions. [2024-06-27 19:36:47,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 632 transitions, 13572 flow [2024-06-27 19:36:47,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:36:47,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:36:47,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-27 19:36:47,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-27 19:36:47,489 INFO L175 Difference]: Start difference. First operand has 459 places, 605 transitions, 11712 flow. Second operand 8 states and 197 transitions. [2024-06-27 19:36:47,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 632 transitions, 13572 flow [2024-06-27 19:36:53,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 632 transitions, 13249 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 19:36:53,185 INFO L231 Difference]: Finished difference. Result has 463 places, 605 transitions, 11849 flow [2024-06-27 19:36:53,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11389, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11849, PETRI_PLACES=463, PETRI_TRANSITIONS=605} [2024-06-27 19:36:53,192 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 421 predicate places. [2024-06-27 19:36:53,192 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 605 transitions, 11849 flow [2024-06-27 19:36:53,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:53,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:53,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:36:53,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-27 19:36:53,192 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:36:53,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:53,193 INFO L85 PathProgramCache]: Analyzing trace with hash 547036197, now seen corresponding path program 8 times [2024-06-27 19:36:53,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:53,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031141230] [2024-06-27 19:36:53,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:53,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:53,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:53,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:36:53,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:53,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031141230] [2024-06-27 19:36:53,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031141230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:53,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:53,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:36:53,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761266822] [2024-06-27 19:36:53,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:53,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:36:53,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:53,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:36:53,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:36:53,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:36:53,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 605 transitions, 11849 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:53,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:53,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:36:53,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:54,609 INFO L124 PetriNetUnfolderBase]: 3051/5132 cut-off events. [2024-06-27 19:36:54,609 INFO L125 PetriNetUnfolderBase]: For 1074101/1074101 co-relation queries the response was YES. [2024-06-27 19:36:54,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47666 conditions, 5132 events. 3051/5132 cut-off events. For 1074101/1074101 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 33894 event pairs, 687 based on Foata normal form. 1/5084 useless extension candidates. Maximal degree in co-relation 47454. Up to 3824 conditions per place. [2024-06-27 19:36:54,676 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 290 selfloop transitions, 338 changer transitions 0/636 dead transitions. [2024-06-27 19:36:54,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 636 transitions, 14183 flow [2024-06-27 19:36:54,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:36:54,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:36:54,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-27 19:36:54,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-27 19:36:54,677 INFO L175 Difference]: Start difference. First operand has 463 places, 605 transitions, 11849 flow. Second operand 8 states and 198 transitions. [2024-06-27 19:36:54,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 636 transitions, 14183 flow [2024-06-27 19:36:59,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 636 transitions, 13346 flow, removed 32 selfloop flow, removed 10 redundant places. [2024-06-27 19:37:00,006 INFO L231 Difference]: Finished difference. Result has 461 places, 611 transitions, 11904 flow [2024-06-27 19:37:00,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11012, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=333, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11904, PETRI_PLACES=461, PETRI_TRANSITIONS=611} [2024-06-27 19:37:00,007 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 419 predicate places. [2024-06-27 19:37:00,007 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 611 transitions, 11904 flow [2024-06-27 19:37:00,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:00,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:00,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:00,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-27 19:37:00,008 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:37:00,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:00,008 INFO L85 PathProgramCache]: Analyzing trace with hash 2135945275, now seen corresponding path program 15 times [2024-06-27 19:37:00,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:00,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985714559] [2024-06-27 19:37:00,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:00,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:00,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:00,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:00,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:00,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985714559] [2024-06-27 19:37:00,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985714559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:00,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:00,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:37:00,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328923306] [2024-06-27 19:37:00,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:00,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:37:00,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:00,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:37:00,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:37:00,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:37:00,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 611 transitions, 11904 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:00,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:00,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:37:00,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:01,316 INFO L124 PetriNetUnfolderBase]: 3056/5154 cut-off events. [2024-06-27 19:37:01,316 INFO L125 PetriNetUnfolderBase]: For 1084505/1084505 co-relation queries the response was YES. [2024-06-27 19:37:01,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47714 conditions, 5154 events. 3056/5154 cut-off events. For 1084505/1084505 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 34184 event pairs, 657 based on Foata normal form. 1/5111 useless extension candidates. Maximal degree in co-relation 47503. Up to 4194 conditions per place. [2024-06-27 19:37:01,394 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 401 selfloop transitions, 228 changer transitions 0/637 dead transitions. [2024-06-27 19:37:01,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 637 transitions, 13553 flow [2024-06-27 19:37:01,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:37:01,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:37:01,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-27 19:37:01,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-27 19:37:01,395 INFO L175 Difference]: Start difference. First operand has 461 places, 611 transitions, 11904 flow. Second operand 8 states and 192 transitions. [2024-06-27 19:37:01,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 637 transitions, 13553 flow [2024-06-27 19:37:07,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 637 transitions, 13009 flow, removed 68 selfloop flow, removed 6 redundant places. [2024-06-27 19:37:07,250 INFO L231 Difference]: Finished difference. Result has 463 places, 614 transitions, 11873 flow [2024-06-27 19:37:07,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11360, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11873, PETRI_PLACES=463, PETRI_TRANSITIONS=614} [2024-06-27 19:37:07,251 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 421 predicate places. [2024-06-27 19:37:07,251 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 614 transitions, 11873 flow [2024-06-27 19:37:07,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:07,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:07,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:07,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-27 19:37:07,252 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:37:07,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:07,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1150937097, now seen corresponding path program 9 times [2024-06-27 19:37:07,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:07,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098603385] [2024-06-27 19:37:07,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:07,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:07,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:07,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:07,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:07,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098603385] [2024-06-27 19:37:07,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098603385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:07,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:07,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:37:07,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186246573] [2024-06-27 19:37:07,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:07,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:37:07,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:07,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:37:07,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:37:07,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:37:07,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 614 transitions, 11873 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:07,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:07,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:37:07,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:08,520 INFO L124 PetriNetUnfolderBase]: 3069/5174 cut-off events. [2024-06-27 19:37:08,521 INFO L125 PetriNetUnfolderBase]: For 1108773/1108773 co-relation queries the response was YES. [2024-06-27 19:37:08,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47878 conditions, 5174 events. 3069/5174 cut-off events. For 1108773/1108773 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 34300 event pairs, 698 based on Foata normal form. 1/5125 useless extension candidates. Maximal degree in co-relation 47667. Up to 3838 conditions per place. [2024-06-27 19:37:08,598 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 295 selfloop transitions, 340 changer transitions 0/643 dead transitions. [2024-06-27 19:37:08,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 643 transitions, 14431 flow [2024-06-27 19:37:08,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:37:08,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:37:08,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-27 19:37:08,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-27 19:37:08,599 INFO L175 Difference]: Start difference. First operand has 463 places, 614 transitions, 11873 flow. Second operand 8 states and 198 transitions. [2024-06-27 19:37:08,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 643 transitions, 14431 flow [2024-06-27 19:37:15,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 643 transitions, 14141 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 19:37:15,716 INFO L231 Difference]: Finished difference. Result has 466 places, 620 transitions, 12417 flow [2024-06-27 19:37:15,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11583, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=334, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12417, PETRI_PLACES=466, PETRI_TRANSITIONS=620} [2024-06-27 19:37:15,717 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 424 predicate places. [2024-06-27 19:37:15,717 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 620 transitions, 12417 flow [2024-06-27 19:37:15,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:15,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:15,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:15,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-27 19:37:15,717 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:37:15,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:15,718 INFO L85 PathProgramCache]: Analyzing trace with hash -681981893, now seen corresponding path program 16 times [2024-06-27 19:37:15,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:15,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617608908] [2024-06-27 19:37:15,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:15,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:15,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:15,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:15,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:15,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617608908] [2024-06-27 19:37:15,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617608908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:15,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:15,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:37:15,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090411284] [2024-06-27 19:37:15,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:15,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:37:15,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:15,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:37:15,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:37:15,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:37:15,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 620 transitions, 12417 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:15,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:15,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:37:15,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:17,032 INFO L124 PetriNetUnfolderBase]: 3074/5184 cut-off events. [2024-06-27 19:37:17,033 INFO L125 PetriNetUnfolderBase]: For 1130050/1130050 co-relation queries the response was YES. [2024-06-27 19:37:17,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48369 conditions, 5184 events. 3074/5184 cut-off events. For 1130050/1130050 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 34416 event pairs, 658 based on Foata normal form. 1/5140 useless extension candidates. Maximal degree in co-relation 48156. Up to 4218 conditions per place. [2024-06-27 19:37:17,117 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 406 selfloop transitions, 229 changer transitions 0/643 dead transitions. [2024-06-27 19:37:17,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 643 transitions, 14077 flow [2024-06-27 19:37:17,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:37:17,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:37:17,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-27 19:37:17,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2024-06-27 19:37:17,118 INFO L175 Difference]: Start difference. First operand has 466 places, 620 transitions, 12417 flow. Second operand 8 states and 190 transitions. [2024-06-27 19:37:17,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 643 transitions, 14077 flow [2024-06-27 19:37:24,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 643 transitions, 13379 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-27 19:37:24,285 INFO L231 Difference]: Finished difference. Result has 470 places, 623 transitions, 12241 flow [2024-06-27 19:37:24,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11723, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12241, PETRI_PLACES=470, PETRI_TRANSITIONS=623} [2024-06-27 19:37:24,288 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 428 predicate places. [2024-06-27 19:37:24,289 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 623 transitions, 12241 flow [2024-06-27 19:37:24,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:24,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:24,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:24,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-27 19:37:24,289 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:37:24,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:24,290 INFO L85 PathProgramCache]: Analyzing trace with hash -676654853, now seen corresponding path program 17 times [2024-06-27 19:37:24,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:24,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458817758] [2024-06-27 19:37:24,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:24,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:24,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:24,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:24,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:24,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458817758] [2024-06-27 19:37:24,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458817758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:24,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:24,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:37:24,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859961562] [2024-06-27 19:37:24,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:24,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:37:24,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:24,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:37:24,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:37:24,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:37:24,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 623 transitions, 12241 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:24,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:24,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:37:24,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:25,594 INFO L124 PetriNetUnfolderBase]: 3079/5187 cut-off events. [2024-06-27 19:37:25,594 INFO L125 PetriNetUnfolderBase]: For 1143965/1143965 co-relation queries the response was YES. [2024-06-27 19:37:25,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48268 conditions, 5187 events. 3079/5187 cut-off events. For 1143965/1143965 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 34412 event pairs, 648 based on Foata normal form. 1/5145 useless extension candidates. Maximal degree in co-relation 48054. Up to 4224 conditions per place. [2024-06-27 19:37:25,669 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 406 selfloop transitions, 232 changer transitions 0/646 dead transitions. [2024-06-27 19:37:25,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 646 transitions, 13911 flow [2024-06-27 19:37:25,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:37:25,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:37:25,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-27 19:37:25,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-27 19:37:25,670 INFO L175 Difference]: Start difference. First operand has 470 places, 623 transitions, 12241 flow. Second operand 8 states and 191 transitions. [2024-06-27 19:37:25,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 646 transitions, 13911 flow [2024-06-27 19:37:31,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 646 transitions, 13621 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 19:37:31,143 INFO L231 Difference]: Finished difference. Result has 473 places, 626 transitions, 12481 flow [2024-06-27 19:37:31,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11954, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12481, PETRI_PLACES=473, PETRI_TRANSITIONS=626} [2024-06-27 19:37:31,144 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 431 predicate places. [2024-06-27 19:37:31,144 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 626 transitions, 12481 flow [2024-06-27 19:37:31,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:31,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:31,144 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] [2024-06-27 19:37:31,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-27 19:37:31,145 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:37:31,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:31,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1151323047, now seen corresponding path program 10 times [2024-06-27 19:37:31,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:31,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551270477] [2024-06-27 19:37:31,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:31,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:31,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:31,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:31,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:31,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551270477] [2024-06-27 19:37:31,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551270477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:31,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:31,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:37:31,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867294747] [2024-06-27 19:37:31,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:31,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:37:31,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:31,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:37:31,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:37:31,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:37:31,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 626 transitions, 12481 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:31,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:31,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:37:31,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:32,570 INFO L124 PetriNetUnfolderBase]: 3076/5185 cut-off events. [2024-06-27 19:37:32,570 INFO L125 PetriNetUnfolderBase]: For 1155667/1155667 co-relation queries the response was YES. [2024-06-27 19:37:32,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48285 conditions, 5185 events. 3076/5185 cut-off events. For 1155667/1155667 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 34399 event pairs, 700 based on Foata normal form. 1/5135 useless extension candidates. Maximal degree in co-relation 48069. Up to 3844 conditions per place. [2024-06-27 19:37:32,642 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 295 selfloop transitions, 345 changer transitions 0/648 dead transitions. [2024-06-27 19:37:32,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 648 transitions, 14649 flow [2024-06-27 19:37:32,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:37:32,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:37:32,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-27 19:37:32,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-27 19:37:32,643 INFO L175 Difference]: Start difference. First operand has 473 places, 626 transitions, 12481 flow. Second operand 8 states and 196 transitions. [2024-06-27 19:37:32,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 648 transitions, 14649 flow [2024-06-27 19:37:38,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 648 transitions, 13931 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-27 19:37:38,727 INFO L231 Difference]: Finished difference. Result has 474 places, 626 transitions, 12459 flow [2024-06-27 19:37:38,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11763, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=345, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12459, PETRI_PLACES=474, PETRI_TRANSITIONS=626} [2024-06-27 19:37:38,727 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 432 predicate places. [2024-06-27 19:37:38,727 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 626 transitions, 12459 flow [2024-06-27 19:37:38,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:38,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:38,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:38,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-27 19:37:38,728 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:37:38,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:38,728 INFO L85 PathProgramCache]: Analyzing trace with hash 642647433, now seen corresponding path program 11 times [2024-06-27 19:37:38,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:38,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280307922] [2024-06-27 19:37:38,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:38,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:38,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:38,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:38,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:38,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280307922] [2024-06-27 19:37:38,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280307922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:38,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:38,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:37:38,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673823864] [2024-06-27 19:37:38,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:38,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:37:38,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:38,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:37:38,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:37:38,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:37:38,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 626 transitions, 12459 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:38,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:38,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:37:38,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:40,292 INFO L124 PetriNetUnfolderBase]: 3081/5209 cut-off events. [2024-06-27 19:37:40,292 INFO L125 PetriNetUnfolderBase]: For 1165953/1165963 co-relation queries the response was YES. [2024-06-27 19:37:40,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48597 conditions, 5209 events. 3081/5209 cut-off events. For 1165953/1165963 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 34673 event pairs, 595 based on Foata normal form. 1/5204 useless extension candidates. Maximal degree in co-relation 48381. Up to 4670 conditions per place. [2024-06-27 19:37:40,367 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 588 selfloop transitions, 48 changer transitions 0/644 dead transitions. [2024-06-27 19:37:40,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 644 transitions, 13856 flow [2024-06-27 19:37:40,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:37:40,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:37:40,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-27 19:37:40,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551829268292683 [2024-06-27 19:37:40,369 INFO L175 Difference]: Start difference. First operand has 474 places, 626 transitions, 12459 flow. Second operand 8 states and 181 transitions. [2024-06-27 19:37:40,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 644 transitions, 13856 flow [2024-06-27 19:37:46,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 644 transitions, 13187 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 19:37:46,915 INFO L231 Difference]: Finished difference. Result has 476 places, 629 transitions, 11981 flow [2024-06-27 19:37:46,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11793, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11981, PETRI_PLACES=476, PETRI_TRANSITIONS=629} [2024-06-27 19:37:46,916 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 434 predicate places. [2024-06-27 19:37:46,916 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 629 transitions, 11981 flow [2024-06-27 19:37:46,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:46,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:46,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:46,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-27 19:37:46,917 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:37:46,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:46,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1067090037, now seen corresponding path program 18 times [2024-06-27 19:37:46,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:46,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077470778] [2024-06-27 19:37:46,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:46,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:46,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:46,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:46,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:46,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077470778] [2024-06-27 19:37:46,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077470778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:46,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:46,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:37:46,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721071402] [2024-06-27 19:37:46,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:46,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:37:46,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:46,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:37:46,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:37:47,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:37:47,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 629 transitions, 11981 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:47,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:47,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:37:47,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:48,409 INFO L124 PetriNetUnfolderBase]: 3078/5204 cut-off events. [2024-06-27 19:37:48,410 INFO L125 PetriNetUnfolderBase]: For 1166670/1166670 co-relation queries the response was YES. [2024-06-27 19:37:48,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47805 conditions, 5204 events. 3078/5204 cut-off events. For 1166670/1166670 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 34678 event pairs, 647 based on Foata normal form. 1/5168 useless extension candidates. Maximal degree in co-relation 47588. Up to 4224 conditions per place. [2024-06-27 19:37:48,479 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 404 selfloop transitions, 238 changer transitions 0/650 dead transitions. [2024-06-27 19:37:48,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 650 transitions, 14157 flow [2024-06-27 19:37:48,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:37:48,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:37:48,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 231 transitions. [2024-06-27 19:37:48,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634146341463414 [2024-06-27 19:37:48,481 INFO L175 Difference]: Start difference. First operand has 476 places, 629 transitions, 11981 flow. Second operand 10 states and 231 transitions. [2024-06-27 19:37:48,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 650 transitions, 14157 flow [2024-06-27 19:37:56,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 650 transitions, 14020 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-27 19:37:56,273 INFO L231 Difference]: Finished difference. Result has 481 places, 629 transitions, 12326 flow [2024-06-27 19:37:56,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11844, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12326, PETRI_PLACES=481, PETRI_TRANSITIONS=629} [2024-06-27 19:37:56,274 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 439 predicate places. [2024-06-27 19:37:56,274 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 629 transitions, 12326 flow [2024-06-27 19:37:56,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:56,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:56,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:56,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-27 19:37:56,275 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:37:56,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:56,275 INFO L85 PathProgramCache]: Analyzing trace with hash 601482151, now seen corresponding path program 12 times [2024-06-27 19:37:56,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:56,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026894096] [2024-06-27 19:37:56,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:56,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:56,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:56,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:56,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:56,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026894096] [2024-06-27 19:37:56,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026894096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:56,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:56,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:37:56,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297507161] [2024-06-27 19:37:56,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:56,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:37:56,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:56,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:37:56,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:37:56,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:37:56,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 629 transitions, 12326 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:56,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:56,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:37:56,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:57,753 INFO L124 PetriNetUnfolderBase]: 3091/5218 cut-off events. [2024-06-27 19:37:57,753 INFO L125 PetriNetUnfolderBase]: For 1198690/1198690 co-relation queries the response was YES. [2024-06-27 19:37:57,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48759 conditions, 5218 events. 3091/5218 cut-off events. For 1198690/1198690 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 34743 event pairs, 702 based on Foata normal form. 1/5168 useless extension candidates. Maximal degree in co-relation 48541. Up to 3856 conditions per place. [2024-06-27 19:37:57,823 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 289 selfloop transitions, 357 changer transitions 0/654 dead transitions. [2024-06-27 19:37:57,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 654 transitions, 14684 flow [2024-06-27 19:37:57,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:37:57,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:37:57,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 19:37:57,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-27 19:37:57,824 INFO L175 Difference]: Start difference. First operand has 481 places, 629 transitions, 12326 flow. Second operand 8 states and 194 transitions. [2024-06-27 19:37:57,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 654 transitions, 14684 flow [2024-06-27 19:38:04,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 654 transitions, 13589 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-27 19:38:04,101 INFO L231 Difference]: Finished difference. Result has 479 places, 635 transitions, 12123 flow [2024-06-27 19:38:04,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11231, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=351, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12123, PETRI_PLACES=479, PETRI_TRANSITIONS=635} [2024-06-27 19:38:04,101 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 437 predicate places. [2024-06-27 19:38:04,101 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 635 transitions, 12123 flow [2024-06-27 19:38:04,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:04,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:04,102 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] [2024-06-27 19:38:04,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-27 19:38:04,102 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:38:04,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:04,102 INFO L85 PathProgramCache]: Analyzing trace with hash 890896651, now seen corresponding path program 19 times [2024-06-27 19:38:04,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:04,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40602302] [2024-06-27 19:38:04,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:04,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:04,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:04,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:04,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:04,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40602302] [2024-06-27 19:38:04,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40602302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:04,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:04,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:38:04,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38763576] [2024-06-27 19:38:04,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:04,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:38:04,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:04,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:38:04,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:38:04,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:38:04,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 635 transitions, 12123 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:04,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:04,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:38:04,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:05,670 INFO L124 PetriNetUnfolderBase]: 3088/5222 cut-off events. [2024-06-27 19:38:05,670 INFO L125 PetriNetUnfolderBase]: For 1192825/1192825 co-relation queries the response was YES. [2024-06-27 19:38:05,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48442 conditions, 5222 events. 3088/5222 cut-off events. For 1192825/1192825 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 34865 event pairs, 647 based on Foata normal form. 1/5186 useless extension candidates. Maximal degree in co-relation 48225. Up to 4239 conditions per place. [2024-06-27 19:38:05,748 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 408 selfloop transitions, 237 changer transitions 0/653 dead transitions. [2024-06-27 19:38:05,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 653 transitions, 14029 flow [2024-06-27 19:38:05,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:38:05,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:38:05,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-27 19:38:05,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-27 19:38:05,749 INFO L175 Difference]: Start difference. First operand has 479 places, 635 transitions, 12123 flow. Second operand 8 states and 189 transitions. [2024-06-27 19:38:05,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 653 transitions, 14029 flow [2024-06-27 19:38:13,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 653 transitions, 13360 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-27 19:38:13,412 INFO L231 Difference]: Finished difference. Result has 483 places, 635 transitions, 11934 flow [2024-06-27 19:38:13,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11454, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11934, PETRI_PLACES=483, PETRI_TRANSITIONS=635} [2024-06-27 19:38:13,413 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 441 predicate places. [2024-06-27 19:38:13,413 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 635 transitions, 11934 flow [2024-06-27 19:38:13,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:13,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:13,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:13,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-27 19:38:13,414 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:38:13,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:13,414 INFO L85 PathProgramCache]: Analyzing trace with hash 601096015, now seen corresponding path program 20 times [2024-06-27 19:38:13,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:13,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146720035] [2024-06-27 19:38:13,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:13,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:13,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:13,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:13,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:13,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146720035] [2024-06-27 19:38:13,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146720035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:13,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:13,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:38:13,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729236579] [2024-06-27 19:38:13,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:13,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:38:13,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:13,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:38:13,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:38:13,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:38:13,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 635 transitions, 11934 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:13,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:13,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:38:13,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:15,014 INFO L124 PetriNetUnfolderBase]: 3085/5206 cut-off events. [2024-06-27 19:38:15,015 INFO L125 PetriNetUnfolderBase]: For 1197711/1197711 co-relation queries the response was YES. [2024-06-27 19:38:15,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48105 conditions, 5206 events. 3085/5206 cut-off events. For 1197711/1197711 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 34617 event pairs, 659 based on Foata normal form. 1/5162 useless extension candidates. Maximal degree in co-relation 47887. Up to 4236 conditions per place. [2024-06-27 19:38:15,085 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 407 selfloop transitions, 237 changer transitions 0/652 dead transitions. [2024-06-27 19:38:15,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 652 transitions, 13556 flow [2024-06-27 19:38:15,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:38:15,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:38:15,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-27 19:38:15,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-27 19:38:15,086 INFO L175 Difference]: Start difference. First operand has 483 places, 635 transitions, 11934 flow. Second operand 8 states and 186 transitions. [2024-06-27 19:38:15,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 652 transitions, 13556 flow [2024-06-27 19:38:21,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 652 transitions, 13076 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 19:38:21,622 INFO L231 Difference]: Finished difference. Result has 484 places, 635 transitions, 11934 flow [2024-06-27 19:38:21,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11454, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11934, PETRI_PLACES=484, PETRI_TRANSITIONS=635} [2024-06-27 19:38:21,622 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 442 predicate places. [2024-06-27 19:38:21,623 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 635 transitions, 11934 flow [2024-06-27 19:38:21,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:21,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:21,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:21,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-27 19:38:21,623 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:38:21,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:21,623 INFO L85 PathProgramCache]: Analyzing trace with hash 601096201, now seen corresponding path program 13 times [2024-06-27 19:38:21,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:21,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528652362] [2024-06-27 19:38:21,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:21,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:21,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:21,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:21,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:21,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528652362] [2024-06-27 19:38:21,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528652362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:21,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:21,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:38:21,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953021597] [2024-06-27 19:38:21,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:21,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:38:21,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:21,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:38:21,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:38:21,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:38:21,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 635 transitions, 11934 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:21,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:21,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:38:21,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:23,033 INFO L124 PetriNetUnfolderBase]: 3082/5203 cut-off events. [2024-06-27 19:38:23,034 INFO L125 PetriNetUnfolderBase]: For 1203496/1203496 co-relation queries the response was YES. [2024-06-27 19:38:23,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48033 conditions, 5203 events. 3082/5203 cut-off events. For 1203496/1203496 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 34638 event pairs, 700 based on Foata normal form. 1/5153 useless extension candidates. Maximal degree in co-relation 47814. Up to 3850 conditions per place. [2024-06-27 19:38:23,100 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 287 selfloop transitions, 358 changer transitions 0/653 dead transitions. [2024-06-27 19:38:23,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 653 transitions, 13848 flow [2024-06-27 19:38:23,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:38:23,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:38:23,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-27 19:38:23,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-27 19:38:23,102 INFO L175 Difference]: Start difference. First operand has 484 places, 635 transitions, 11934 flow. Second operand 8 states and 192 transitions. [2024-06-27 19:38:23,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 653 transitions, 13848 flow [2024-06-27 19:38:29,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 653 transitions, 13314 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-27 19:38:29,868 INFO L231 Difference]: Finished difference. Result has 485 places, 635 transitions, 12122 flow [2024-06-27 19:38:29,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11400, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=358, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12122, PETRI_PLACES=485, PETRI_TRANSITIONS=635} [2024-06-27 19:38:29,869 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 443 predicate places. [2024-06-27 19:38:29,869 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 635 transitions, 12122 flow [2024-06-27 19:38:29,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:29,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:29,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:29,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-27 19:38:29,870 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:38:29,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:29,870 INFO L85 PathProgramCache]: Analyzing trace with hash 829620863, now seen corresponding path program 14 times [2024-06-27 19:38:29,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:29,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775669169] [2024-06-27 19:38:29,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:29,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:29,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:29,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:29,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:29,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775669169] [2024-06-27 19:38:29,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775669169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:29,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:29,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:38:29,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515121397] [2024-06-27 19:38:29,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:29,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:38:29,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:29,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:38:29,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:38:30,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:38:30,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 635 transitions, 12122 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:30,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:30,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:38:30,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:31,442 INFO L124 PetriNetUnfolderBase]: 3097/5243 cut-off events. [2024-06-27 19:38:31,442 INFO L125 PetriNetUnfolderBase]: For 1220786/1220796 co-relation queries the response was YES. [2024-06-27 19:38:31,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48595 conditions, 5243 events. 3097/5243 cut-off events. For 1220786/1220796 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 35019 event pairs, 582 based on Foata normal form. 1/5242 useless extension candidates. Maximal degree in co-relation 48375. Up to 4711 conditions per place. [2024-06-27 19:38:31,515 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 620 selfloop transitions, 34 changer transitions 0/662 dead transitions. [2024-06-27 19:38:31,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 662 transitions, 13686 flow [2024-06-27 19:38:31,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:38:31,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:38:31,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-27 19:38:31,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5640243902439024 [2024-06-27 19:38:31,516 INFO L175 Difference]: Start difference. First operand has 485 places, 635 transitions, 12122 flow. Second operand 8 states and 185 transitions. [2024-06-27 19:38:31,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 662 transitions, 13686 flow [2024-06-27 19:38:38,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 662 transitions, 12952 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 19:38:38,118 INFO L231 Difference]: Finished difference. Result has 487 places, 644 transitions, 11682 flow [2024-06-27 19:38:38,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11402, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=604, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11682, PETRI_PLACES=487, PETRI_TRANSITIONS=644} [2024-06-27 19:38:38,119 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 445 predicate places. [2024-06-27 19:38:38,119 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 644 transitions, 11682 flow [2024-06-27 19:38:38,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:38,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:38,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:38,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-27 19:38:38,120 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:38:38,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:38,120 INFO L85 PathProgramCache]: Analyzing trace with hash 657845957, now seen corresponding path program 21 times [2024-06-27 19:38:38,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:38,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242050886] [2024-06-27 19:38:38,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:38,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:38,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:38,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:38,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:38,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242050886] [2024-06-27 19:38:38,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242050886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:38,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:38,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:38:38,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975267417] [2024-06-27 19:38:38,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:38,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:38:38,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:38,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:38:38,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:38:38,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:38:38,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 644 transitions, 11682 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:38,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:38,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:38:38,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:39,741 INFO L124 PetriNetUnfolderBase]: 3094/5232 cut-off events. [2024-06-27 19:38:39,742 INFO L125 PetriNetUnfolderBase]: For 1217290/1217290 co-relation queries the response was YES. [2024-06-27 19:38:39,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47742 conditions, 5232 events. 3094/5232 cut-off events. For 1217290/1217290 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 34953 event pairs, 575 based on Foata normal form. 1/5220 useless extension candidates. Maximal degree in co-relation 47520. Up to 4395 conditions per place. [2024-06-27 19:38:39,823 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 500 selfloop transitions, 162 changer transitions 0/670 dead transitions. [2024-06-27 19:38:39,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 670 transitions, 13384 flow [2024-06-27 19:38:39,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:38:39,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:38:39,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-27 19:38:39,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-27 19:38:39,825 INFO L175 Difference]: Start difference. First operand has 487 places, 644 transitions, 11682 flow. Second operand 7 states and 178 transitions. [2024-06-27 19:38:39,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 670 transitions, 13384 flow [2024-06-27 19:38:46,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 670 transitions, 13234 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-27 19:38:46,863 INFO L231 Difference]: Finished difference. Result has 489 places, 644 transitions, 11870 flow [2024-06-27 19:38:46,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11532, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11870, PETRI_PLACES=489, PETRI_TRANSITIONS=644} [2024-06-27 19:38:46,864 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 447 predicate places. [2024-06-27 19:38:46,864 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 644 transitions, 11870 flow [2024-06-27 19:38:46,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:46,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:46,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:46,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-27 19:38:46,865 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:38:46,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:46,865 INFO L85 PathProgramCache]: Analyzing trace with hash -760849701, now seen corresponding path program 15 times [2024-06-27 19:38:46,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:46,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232341639] [2024-06-27 19:38:46,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:46,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:46,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:46,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:46,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:46,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232341639] [2024-06-27 19:38:46,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232341639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:46,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:46,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:38:46,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71685631] [2024-06-27 19:38:46,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:46,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:38:46,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:46,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:38:46,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:38:47,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:38:47,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 644 transitions, 11870 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:47,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:47,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:38:47,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:48,442 INFO L124 PetriNetUnfolderBase]: 3131/5315 cut-off events. [2024-06-27 19:38:48,442 INFO L125 PetriNetUnfolderBase]: For 1277925/1277927 co-relation queries the response was YES. [2024-06-27 19:38:48,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49387 conditions, 5315 events. 3131/5315 cut-off events. For 1277925/1277927 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 35639 event pairs, 578 based on Foata normal form. 1/5314 useless extension candidates. Maximal degree in co-relation 49164. Up to 4219 conditions per place. [2024-06-27 19:38:48,514 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 429 selfloop transitions, 250 changer transitions 0/687 dead transitions. [2024-06-27 19:38:48,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 687 transitions, 14281 flow [2024-06-27 19:38:48,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:38:48,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:38:48,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 241 transitions. [2024-06-27 19:38:48,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5878048780487805 [2024-06-27 19:38:48,515 INFO L175 Difference]: Start difference. First operand has 489 places, 644 transitions, 11870 flow. Second operand 10 states and 241 transitions. [2024-06-27 19:38:48,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 687 transitions, 14281 flow [2024-06-27 19:38:55,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 687 transitions, 13889 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 19:38:55,757 INFO L231 Difference]: Finished difference. Result has 491 places, 657 transitions, 12277 flow [2024-06-27 19:38:55,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11482, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12277, PETRI_PLACES=491, PETRI_TRANSITIONS=657} [2024-06-27 19:38:55,758 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 449 predicate places. [2024-06-27 19:38:55,758 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 657 transitions, 12277 flow [2024-06-27 19:38:55,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:55,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:55,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:55,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-27 19:38:55,759 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:38:55,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:55,759 INFO L85 PathProgramCache]: Analyzing trace with hash -624114777, now seen corresponding path program 22 times [2024-06-27 19:38:55,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:55,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032672022] [2024-06-27 19:38:55,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:55,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:55,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:55,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:55,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:55,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032672022] [2024-06-27 19:38:55,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032672022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:55,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:55,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:38:55,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745414379] [2024-06-27 19:38:55,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:55,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:38:55,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:55,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:38:55,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:38:55,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:38:55,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 657 transitions, 12277 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:55,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:55,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:38:55,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:57,283 INFO L124 PetriNetUnfolderBase]: 3128/5303 cut-off events. [2024-06-27 19:38:57,283 INFO L125 PetriNetUnfolderBase]: For 1267142/1267144 co-relation queries the response was YES. [2024-06-27 19:38:57,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49366 conditions, 5303 events. 3128/5303 cut-off events. For 1267142/1267144 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 35531 event pairs, 565 based on Foata normal form. 1/5302 useless extension candidates. Maximal degree in co-relation 49143. Up to 4443 conditions per place. [2024-06-27 19:38:57,354 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 517 selfloop transitions, 165 changer transitions 0/690 dead transitions. [2024-06-27 19:38:57,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 690 transitions, 14041 flow [2024-06-27 19:38:57,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:38:57,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:38:57,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-27 19:38:57,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6189024390243902 [2024-06-27 19:38:57,355 INFO L175 Difference]: Start difference. First operand has 491 places, 657 transitions, 12277 flow. Second operand 8 states and 203 transitions. [2024-06-27 19:38:57,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 690 transitions, 14041 flow [2024-06-27 19:39:04,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 690 transitions, 13861 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-27 19:39:04,213 INFO L231 Difference]: Finished difference. Result has 494 places, 657 transitions, 12450 flow [2024-06-27 19:39:04,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12099, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12450, PETRI_PLACES=494, PETRI_TRANSITIONS=657} [2024-06-27 19:39:04,213 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 452 predicate places. [2024-06-27 19:39:04,214 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 657 transitions, 12450 flow [2024-06-27 19:39:04,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:04,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:39:04,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:39:04,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-27 19:39:04,214 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:39:04,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:39:04,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1311995427, now seen corresponding path program 16 times [2024-06-27 19:39:04,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:39:04,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861039800] [2024-06-27 19:39:04,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:39:04,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:39:04,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:39:04,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:39:04,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:39:04,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861039800] [2024-06-27 19:39:04,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861039800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:39:04,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:39:04,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:39:04,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137313988] [2024-06-27 19:39:04,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:39:04,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:39:04,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:39:04,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:39:04,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:39:04,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:39:04,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 657 transitions, 12450 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:04,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:39:04,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:39:04,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:39:05,844 INFO L124 PetriNetUnfolderBase]: 3125/5287 cut-off events. [2024-06-27 19:39:05,844 INFO L125 PetriNetUnfolderBase]: For 1258740/1258750 co-relation queries the response was YES. [2024-06-27 19:39:05,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49548 conditions, 5287 events. 3125/5287 cut-off events. For 1258740/1258750 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 35364 event pairs, 572 based on Foata normal form. 1/5284 useless extension candidates. Maximal degree in co-relation 49323. Up to 4402 conditions per place. [2024-06-27 19:39:05,916 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 506 selfloop transitions, 173 changer transitions 0/687 dead transitions. [2024-06-27 19:39:05,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 687 transitions, 14590 flow [2024-06-27 19:39:05,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:39:05,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:39:05,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-27 19:39:05,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6480836236933798 [2024-06-27 19:39:05,917 INFO L175 Difference]: Start difference. First operand has 494 places, 657 transitions, 12450 flow. Second operand 7 states and 186 transitions. [2024-06-27 19:39:05,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 687 transitions, 14590 flow [2024-06-27 19:39:13,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 687 transitions, 13970 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-27 19:39:13,237 INFO L231 Difference]: Finished difference. Result has 490 places, 658 transitions, 12255 flow [2024-06-27 19:39:13,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11838, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12255, PETRI_PLACES=490, PETRI_TRANSITIONS=658} [2024-06-27 19:39:13,238 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 448 predicate places. [2024-06-27 19:39:13,238 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 658 transitions, 12255 flow [2024-06-27 19:39:13,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:13,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:39:13,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:39:13,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-27 19:39:13,239 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:39:13,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:39:13,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1848024689, now seen corresponding path program 17 times [2024-06-27 19:39:13,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:39:13,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533971905] [2024-06-27 19:39:13,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:39:13,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:39:13,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:39:13,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:39:13,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:39:13,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533971905] [2024-06-27 19:39:13,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533971905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:39:13,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:39:13,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:39:13,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219811948] [2024-06-27 19:39:13,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:39:13,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:39:13,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:39:13,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:39:13,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:39:13,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:39:13,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 658 transitions, 12255 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:13,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:39:13,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:39:13,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:39:14,855 INFO L124 PetriNetUnfolderBase]: 3122/5287 cut-off events. [2024-06-27 19:39:14,855 INFO L125 PetriNetUnfolderBase]: For 1229006/1229006 co-relation queries the response was YES. [2024-06-27 19:39:14,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49113 conditions, 5287 events. 3122/5287 cut-off events. For 1229006/1229006 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 35442 event pairs, 564 based on Foata normal form. 1/5286 useless extension candidates. Maximal degree in co-relation 48890. Up to 4659 conditions per place. [2024-06-27 19:39:14,926 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 616 selfloop transitions, 67 changer transitions 0/691 dead transitions. [2024-06-27 19:39:14,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 691 transitions, 14025 flow [2024-06-27 19:39:14,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:39:14,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:39:14,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-27 19:39:14,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376306620209059 [2024-06-27 19:39:14,928 INFO L175 Difference]: Start difference. First operand has 490 places, 658 transitions, 12255 flow. Second operand 7 states and 183 transitions. [2024-06-27 19:39:14,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 691 transitions, 14025 flow [2024-06-27 19:39:21,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 691 transitions, 13625 flow, removed 56 selfloop flow, removed 9 redundant places. [2024-06-27 19:39:21,881 INFO L231 Difference]: Finished difference. Result has 488 places, 658 transitions, 12011 flow [2024-06-27 19:39:21,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11855, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=591, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12011, PETRI_PLACES=488, PETRI_TRANSITIONS=658} [2024-06-27 19:39:21,881 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 446 predicate places. [2024-06-27 19:39:21,882 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 658 transitions, 12011 flow [2024-06-27 19:39:21,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:21,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:39:21,882 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] [2024-06-27 19:39:21,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-27 19:39:21,882 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:39:21,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:39:21,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1614258037, now seen corresponding path program 18 times [2024-06-27 19:39:21,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:39:21,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871111661] [2024-06-27 19:39:21,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:39:21,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:39:21,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:39:21,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:39:21,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:39:21,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871111661] [2024-06-27 19:39:21,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871111661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:39:21,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:39:21,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:39:21,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377074520] [2024-06-27 19:39:21,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:39:21,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:39:21,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:39:21,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:39:21,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:39:22,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:39:22,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 658 transitions, 12011 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:22,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:39:22,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:39:22,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:39:23,449 INFO L124 PetriNetUnfolderBase]: 3127/5289 cut-off events. [2024-06-27 19:39:23,449 INFO L125 PetriNetUnfolderBase]: For 1248884/1248884 co-relation queries the response was YES. [2024-06-27 19:39:23,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48927 conditions, 5289 events. 3127/5289 cut-off events. For 1248884/1248884 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 35365 event pairs, 582 based on Foata normal form. 1/5277 useless extension candidates. Maximal degree in co-relation 48707. Up to 4217 conditions per place. [2024-06-27 19:39:23,697 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 418 selfloop transitions, 263 changer transitions 0/689 dead transitions. [2024-06-27 19:39:23,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 689 transitions, 14779 flow [2024-06-27 19:39:23,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:39:23,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:39:23,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-27 19:39:23,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-27 19:39:23,698 INFO L175 Difference]: Start difference. First operand has 488 places, 658 transitions, 12011 flow. Second operand 8 states and 202 transitions. [2024-06-27 19:39:23,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 689 transitions, 14779 flow [2024-06-27 19:39:29,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 689 transitions, 14469 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 19:39:29,527 INFO L231 Difference]: Finished difference. Result has 490 places, 662 transitions, 12387 flow [2024-06-27 19:39:29,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11701, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12387, PETRI_PLACES=490, PETRI_TRANSITIONS=662} [2024-06-27 19:39:29,528 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 448 predicate places. [2024-06-27 19:39:29,528 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 662 transitions, 12387 flow [2024-06-27 19:39:29,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:29,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:39:29,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:39:29,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-27 19:39:29,528 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:39:29,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:39:29,529 INFO L85 PathProgramCache]: Analyzing trace with hash 799293917, now seen corresponding path program 19 times [2024-06-27 19:39:29,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:39:29,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414245761] [2024-06-27 19:39:29,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:39:29,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:39:29,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:39:29,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:39:29,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:39:29,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414245761] [2024-06-27 19:39:29,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414245761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:39:29,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:39:29,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:39:29,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795664546] [2024-06-27 19:39:29,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:39:29,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:39:29,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:39:29,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:39:29,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:39:29,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:39:29,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 662 transitions, 12387 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:29,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:39:29,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:39:29,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:39:31,001 INFO L124 PetriNetUnfolderBase]: 3124/5286 cut-off events. [2024-06-27 19:39:31,002 INFO L125 PetriNetUnfolderBase]: For 1254122/1254132 co-relation queries the response was YES. [2024-06-27 19:39:31,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49221 conditions, 5286 events. 3124/5286 cut-off events. For 1254122/1254132 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 35362 event pairs, 569 based on Foata normal form. 1/5283 useless extension candidates. Maximal degree in co-relation 49001. Up to 4405 conditions per place. [2024-06-27 19:39:31,073 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 501 selfloop transitions, 188 changer transitions 0/697 dead transitions. [2024-06-27 19:39:31,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 697 transitions, 14171 flow [2024-06-27 19:39:31,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:39:31,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:39:31,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-06-27 19:39:31,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260162601626016 [2024-06-27 19:39:31,075 INFO L175 Difference]: Start difference. First operand has 490 places, 662 transitions, 12387 flow. Second operand 9 states and 231 transitions. [2024-06-27 19:39:31,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 697 transitions, 14171 flow [2024-06-27 19:39:39,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 697 transitions, 13497 flow, removed 59 selfloop flow, removed 6 redundant places. [2024-06-27 19:39:39,706 INFO L231 Difference]: Finished difference. Result has 493 places, 662 transitions, 12111 flow [2024-06-27 19:39:39,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11713, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12111, PETRI_PLACES=493, PETRI_TRANSITIONS=662} [2024-06-27 19:39:39,707 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 451 predicate places. [2024-06-27 19:39:39,707 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 662 transitions, 12111 flow [2024-06-27 19:39:39,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:39,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:39:39,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:39:39,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-27 19:39:39,707 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:39:39,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:39:39,708 INFO L85 PathProgramCache]: Analyzing trace with hash 401138243, now seen corresponding path program 20 times [2024-06-27 19:39:39,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:39:39,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577125313] [2024-06-27 19:39:39,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:39:39,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:39:39,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:39:39,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:39:39,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:39:39,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577125313] [2024-06-27 19:39:39,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577125313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:39:39,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:39:39,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:39:39,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310550990] [2024-06-27 19:39:39,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:39:39,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:39:39,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:39:39,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:39:39,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:39:39,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:39:39,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 662 transitions, 12111 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:39,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:39:39,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:39:39,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:39:41,336 INFO L124 PetriNetUnfolderBase]: 3121/5298 cut-off events. [2024-06-27 19:39:41,336 INFO L125 PetriNetUnfolderBase]: For 1253281/1253281 co-relation queries the response was YES. [2024-06-27 19:39:41,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48974 conditions, 5298 events. 3121/5298 cut-off events. For 1253281/1253281 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 35566 event pairs, 594 based on Foata normal form. 1/5286 useless extension candidates. Maximal degree in co-relation 48753. Up to 4213 conditions per place. [2024-06-27 19:39:41,409 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 415 selfloop transitions, 267 changer transitions 0/690 dead transitions. [2024-06-27 19:39:41,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 690 transitions, 14159 flow [2024-06-27 19:39:41,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:39:41,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:39:41,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-27 19:39:41,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6189024390243902 [2024-06-27 19:39:41,410 INFO L175 Difference]: Start difference. First operand has 493 places, 662 transitions, 12111 flow. Second operand 8 states and 203 transitions. [2024-06-27 19:39:41,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 690 transitions, 14159 flow [2024-06-27 19:39:50,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 690 transitions, 13683 flow, removed 35 selfloop flow, removed 9 redundant places. [2024-06-27 19:39:50,613 INFO L231 Difference]: Finished difference. Result has 492 places, 662 transitions, 12179 flow [2024-06-27 19:39:50,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11639, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12179, PETRI_PLACES=492, PETRI_TRANSITIONS=662} [2024-06-27 19:39:50,614 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 450 predicate places. [2024-06-27 19:39:50,614 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 662 transitions, 12179 flow [2024-06-27 19:39:50,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:50,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:39:50,614 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] [2024-06-27 19:39:50,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-27 19:39:50,615 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:39:50,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:39:50,615 INFO L85 PathProgramCache]: Analyzing trace with hash -768201351, now seen corresponding path program 21 times [2024-06-27 19:39:50,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:39:50,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350609159] [2024-06-27 19:39:50,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:39:50,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:39:50,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:39:50,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:39:50,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:39:50,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350609159] [2024-06-27 19:39:50,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350609159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:39:50,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:39:50,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:39:50,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275188871] [2024-06-27 19:39:50,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:39:50,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:39:50,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:39:50,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:39:50,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:39:50,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:39:50,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 662 transitions, 12179 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:50,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:39:50,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:39:50,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:39:52,030 INFO L124 PetriNetUnfolderBase]: 3126/5313 cut-off events. [2024-06-27 19:39:52,030 INFO L125 PetriNetUnfolderBase]: For 1254739/1254741 co-relation queries the response was YES. [2024-06-27 19:39:52,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49164 conditions, 5313 events. 3126/5313 cut-off events. For 1254739/1254741 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 35659 event pairs, 574 based on Foata normal form. 1/5312 useless extension candidates. Maximal degree in co-relation 48943. Up to 4217 conditions per place. [2024-06-27 19:39:52,265 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 428 selfloop transitions, 260 changer transitions 0/696 dead transitions. [2024-06-27 19:39:52,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 696 transitions, 14328 flow [2024-06-27 19:39:52,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:39:52,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:39:52,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-06-27 19:39:52,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 19:39:52,267 INFO L175 Difference]: Start difference. First operand has 492 places, 662 transitions, 12179 flow. Second operand 9 states and 225 transitions. [2024-06-27 19:39:52,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 696 transitions, 14328 flow [2024-06-27 19:39:59,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 696 transitions, 13728 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 19:39:59,474 INFO L231 Difference]: Finished difference. Result has 493 places, 665 transitions, 12198 flow [2024-06-27 19:39:59,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11589, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=257, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12198, PETRI_PLACES=493, PETRI_TRANSITIONS=665} [2024-06-27 19:39:59,475 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 451 predicate places. [2024-06-27 19:39:59,475 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 665 transitions, 12198 flow [2024-06-27 19:39:59,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:59,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:39:59,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:39:59,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-27 19:39:59,476 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:39:59,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:39:59,476 INFO L85 PathProgramCache]: Analyzing trace with hash -624322167, now seen corresponding path program 23 times [2024-06-27 19:39:59,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:39:59,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749558037] [2024-06-27 19:39:59,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:39:59,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:39:59,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:39:59,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:39:59,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:39:59,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749558037] [2024-06-27 19:39:59,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749558037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:39:59,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:39:59,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:39:59,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533745396] [2024-06-27 19:39:59,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:39:59,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:39:59,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:39:59,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:39:59,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:39:59,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:39:59,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 665 transitions, 12198 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:59,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:39:59,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:39:59,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:40:00,976 INFO L124 PetriNetUnfolderBase]: 3123/5305 cut-off events. [2024-06-27 19:40:00,976 INFO L125 PetriNetUnfolderBase]: For 1243487/1243489 co-relation queries the response was YES. [2024-06-27 19:40:01,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48939 conditions, 5305 events. 3123/5305 cut-off events. For 1243487/1243489 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 35602 event pairs, 571 based on Foata normal form. 1/5304 useless extension candidates. Maximal degree in co-relation 48717. Up to 4438 conditions per place. [2024-06-27 19:40:01,208 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 534 selfloop transitions, 159 changer transitions 0/701 dead transitions. [2024-06-27 19:40:01,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 701 transitions, 13998 flow [2024-06-27 19:40:01,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:40:01,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:40:01,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-27 19:40:01,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6124661246612466 [2024-06-27 19:40:01,221 INFO L175 Difference]: Start difference. First operand has 493 places, 665 transitions, 12198 flow. Second operand 9 states and 226 transitions. [2024-06-27 19:40:01,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 701 transitions, 13998 flow [2024-06-27 19:40:08,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 701 transitions, 13441 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-27 19:40:08,598 INFO L231 Difference]: Finished difference. Result has 494 places, 665 transitions, 11982 flow [2024-06-27 19:40:08,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11643, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11982, PETRI_PLACES=494, PETRI_TRANSITIONS=665} [2024-06-27 19:40:08,599 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 452 predicate places. [2024-06-27 19:40:08,599 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 665 transitions, 11982 flow [2024-06-27 19:40:08,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:40:08,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:40:08,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:40:08,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-27 19:40:08,600 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:40:08,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:40:08,600 INFO L85 PathProgramCache]: Analyzing trace with hash -624321981, now seen corresponding path program 22 times [2024-06-27 19:40:08,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:40:08,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253481445] [2024-06-27 19:40:08,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:40:08,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:40:08,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:40:08,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:40:08,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:40:08,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253481445] [2024-06-27 19:40:08,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253481445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:40:08,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:40:08,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:40:08,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274093675] [2024-06-27 19:40:08,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:40:08,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:40:08,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:40:08,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:40:08,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:40:08,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:40:08,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 665 transitions, 11982 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:40:08,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:40:08,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:40:08,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:40:10,240 INFO L124 PetriNetUnfolderBase]: 3120/5304 cut-off events. [2024-06-27 19:40:10,240 INFO L125 PetriNetUnfolderBase]: For 1233522/1233524 co-relation queries the response was YES. [2024-06-27 19:40:10,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48547 conditions, 5304 events. 3120/5304 cut-off events. For 1233522/1233524 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 35635 event pairs, 574 based on Foata normal form. 1/5303 useless extension candidates. Maximal degree in co-relation 48325. Up to 4213 conditions per place. [2024-06-27 19:40:10,310 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 427 selfloop transitions, 263 changer transitions 0/698 dead transitions. [2024-06-27 19:40:10,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 698 transitions, 13764 flow [2024-06-27 19:40:10,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:40:10,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:40:10,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 228 transitions. [2024-06-27 19:40:10,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-27 19:40:10,311 INFO L175 Difference]: Start difference. First operand has 494 places, 665 transitions, 11982 flow. Second operand 9 states and 228 transitions. [2024-06-27 19:40:10,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 698 transitions, 13764 flow [2024-06-27 19:40:17,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 698 transitions, 13428 flow, removed 26 selfloop flow, removed 10 redundant places. [2024-06-27 19:40:17,919 INFO L231 Difference]: Finished difference. Result has 493 places, 665 transitions, 12186 flow [2024-06-27 19:40:17,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11650, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12186, PETRI_PLACES=493, PETRI_TRANSITIONS=665} [2024-06-27 19:40:17,920 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 451 predicate places. [2024-06-27 19:40:17,920 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 665 transitions, 12186 flow [2024-06-27 19:40:17,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:40:17,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:40:17,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:40:17,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-27 19:40:17,921 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:40:17,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:40:17,921 INFO L85 PathProgramCache]: Analyzing trace with hash 401138057, now seen corresponding path program 24 times [2024-06-27 19:40:17,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:40:17,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921320475] [2024-06-27 19:40:17,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:40:17,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:40:17,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:40:18,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:40:18,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:40:18,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921320475] [2024-06-27 19:40:18,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921320475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:40:18,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:40:18,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:40:18,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122673121] [2024-06-27 19:40:18,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:40:18,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:40:18,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:40:18,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:40:18,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:40:18,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:40:18,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 665 transitions, 12186 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:40:18,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:40:18,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:40:18,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:40:19,445 INFO L124 PetriNetUnfolderBase]: 3117/5295 cut-off events. [2024-06-27 19:40:19,445 INFO L125 PetriNetUnfolderBase]: For 1211202/1211202 co-relation queries the response was YES. [2024-06-27 19:40:19,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48426 conditions, 5295 events. 3117/5295 cut-off events. For 1211202/1211202 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 35603 event pairs, 586 based on Foata normal form. 1/5283 useless extension candidates. Maximal degree in co-relation 48205. Up to 4431 conditions per place. [2024-06-27 19:40:19,517 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 524 selfloop transitions, 162 changer transitions 0/694 dead transitions. [2024-06-27 19:40:19,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 694 transitions, 13658 flow [2024-06-27 19:40:19,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:40:19,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:40:19,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-27 19:40:19,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 19:40:19,518 INFO L175 Difference]: Start difference. First operand has 493 places, 665 transitions, 12186 flow. Second operand 8 states and 200 transitions. [2024-06-27 19:40:19,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 694 transitions, 13658 flow [2024-06-27 19:40:28,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 694 transitions, 13056 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-27 19:40:28,033 INFO L231 Difference]: Finished difference. Result has 491 places, 665 transitions, 11925 flow [2024-06-27 19:40:28,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11584, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11925, PETRI_PLACES=491, PETRI_TRANSITIONS=665} [2024-06-27 19:40:28,033 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 449 predicate places. [2024-06-27 19:40:28,033 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 665 transitions, 11925 flow [2024-06-27 19:40:28,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:40:28,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:40:28,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:40:28,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-27 19:40:28,034 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:40:28,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:40:28,034 INFO L85 PathProgramCache]: Analyzing trace with hash -772023837, now seen corresponding path program 4 times [2024-06-27 19:40:28,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:40:28,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388139646] [2024-06-27 19:40:28,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:40:28,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:40:28,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:40:28,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:40:28,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:40:28,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388139646] [2024-06-27 19:40:28,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388139646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:40:28,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:40:28,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:40:28,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468070287] [2024-06-27 19:40:28,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:40:28,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:40:28,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:40:28,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:40:28,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:40:28,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:40:28,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 665 transitions, 11925 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:40:28,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:40:28,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:40:28,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:40:29,702 INFO L124 PetriNetUnfolderBase]: 3104/5283 cut-off events. [2024-06-27 19:40:29,702 INFO L125 PetriNetUnfolderBase]: For 1198272/1198272 co-relation queries the response was YES. [2024-06-27 19:40:29,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47211 conditions, 5283 events. 3104/5283 cut-off events. For 1198272/1198272 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 35478 event pairs, 440 based on Foata normal form. 6/5287 useless extension candidates. Maximal degree in co-relation 46990. Up to 4388 conditions per place. [2024-06-27 19:40:29,774 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 630 selfloop transitions, 61 changer transitions 0/699 dead transitions. [2024-06-27 19:40:29,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 699 transitions, 13449 flow [2024-06-27 19:40:29,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:40:29,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:40:29,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-27 19:40:29,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627177700348432 [2024-06-27 19:40:29,775 INFO L175 Difference]: Start difference. First operand has 491 places, 665 transitions, 11925 flow. Second operand 7 states and 180 transitions. [2024-06-27 19:40:29,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 699 transitions, 13449 flow [2024-06-27 19:40:38,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 699 transitions, 12930 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-27 19:40:38,039 INFO L231 Difference]: Finished difference. Result has 488 places, 665 transitions, 11538 flow [2024-06-27 19:40:38,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11406, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=604, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11538, PETRI_PLACES=488, PETRI_TRANSITIONS=665} [2024-06-27 19:40:38,040 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 446 predicate places. [2024-06-27 19:40:38,040 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 665 transitions, 11538 flow [2024-06-27 19:40:38,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:40:38,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:40:38,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:40:38,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-27 19:40:38,041 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:40:38,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:40:38,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1151152237, now seen corresponding path program 5 times [2024-06-27 19:40:38,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:40:38,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679774458] [2024-06-27 19:40:38,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:40:38,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:40:38,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:40:38,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:40:38,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:40:38,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679774458] [2024-06-27 19:40:38,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679774458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:40:38,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:40:38,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:40:38,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113164287] [2024-06-27 19:40:38,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:40:38,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:40:38,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:40:38,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:40:38,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:40:38,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:40:38,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 665 transitions, 11538 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:40:38,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:40:38,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:40:38,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:40:39,593 INFO L124 PetriNetUnfolderBase]: 3112/5285 cut-off events. [2024-06-27 19:40:39,593 INFO L125 PetriNetUnfolderBase]: For 1152715/1152715 co-relation queries the response was YES. [2024-06-27 19:40:39,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46969 conditions, 5285 events. 3112/5285 cut-off events. For 1152715/1152715 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 35547 event pairs, 609 based on Foata normal form. 2/5269 useless extension candidates. Maximal degree in co-relation 46748. Up to 4584 conditions per place. [2024-06-27 19:40:39,666 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 584 selfloop transitions, 97 changer transitions 0/689 dead transitions. [2024-06-27 19:40:39,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 689 transitions, 13002 flow [2024-06-27 19:40:39,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:40:39,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:40:39,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-27 19:40:39,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5640243902439024 [2024-06-27 19:40:39,667 INFO L175 Difference]: Start difference. First operand has 488 places, 665 transitions, 11538 flow. Second operand 8 states and 185 transitions. [2024-06-27 19:40:39,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 689 transitions, 13002 flow [2024-06-27 19:40:47,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 689 transitions, 12897 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 19:40:47,173 INFO L231 Difference]: Finished difference. Result has 491 places, 667 transitions, 11664 flow [2024-06-27 19:40:47,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11433, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11664, PETRI_PLACES=491, PETRI_TRANSITIONS=667} [2024-06-27 19:40:47,174 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 449 predicate places. [2024-06-27 19:40:47,174 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 667 transitions, 11664 flow [2024-06-27 19:40:47,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:40:47,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:40:47,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:40:47,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-27 19:40:47,175 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:40:47,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:40:47,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1002890007, now seen corresponding path program 6 times [2024-06-27 19:40:47,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:40:47,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019869676] [2024-06-27 19:40:47,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:40:47,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:40:47,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:40:47,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:40:47,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:40:47,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019869676] [2024-06-27 19:40:47,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019869676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:40:47,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:40:47,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:40:47,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356218174] [2024-06-27 19:40:47,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:40:47,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:40:47,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:40:47,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:40:47,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:40:47,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:40:47,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 667 transitions, 11664 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:40:47,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:40:47,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:40:47,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:40:48,614 INFO L124 PetriNetUnfolderBase]: 3133/5322 cut-off events. [2024-06-27 19:40:48,614 INFO L125 PetriNetUnfolderBase]: For 1147860/1147866 co-relation queries the response was YES. [2024-06-27 19:40:48,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47286 conditions, 5322 events. 3133/5322 cut-off events. For 1147860/1147866 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 35837 event pairs, 602 based on Foata normal form. 6/5318 useless extension candidates. Maximal degree in co-relation 47065. Up to 4577 conditions per place. [2024-06-27 19:40:48,688 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 594 selfloop transitions, 95 changer transitions 0/697 dead transitions. [2024-06-27 19:40:48,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 697 transitions, 13490 flow [2024-06-27 19:40:48,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:40:48,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:40:48,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-27 19:40:48,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-27 19:40:48,689 INFO L175 Difference]: Start difference. First operand has 491 places, 667 transitions, 11664 flow. Second operand 7 states and 171 transitions. [2024-06-27 19:40:48,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 697 transitions, 13490 flow [2024-06-27 19:40:56,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 697 transitions, 13279 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 19:40:56,215 INFO L231 Difference]: Finished difference. Result has 492 places, 671 transitions, 11724 flow [2024-06-27 19:40:56,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11453, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11724, PETRI_PLACES=492, PETRI_TRANSITIONS=671} [2024-06-27 19:40:56,216 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 450 predicate places. [2024-06-27 19:40:56,216 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 671 transitions, 11724 flow [2024-06-27 19:40:56,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:40:56,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:40:56,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:40:56,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-27 19:40:56,217 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)] === [2024-06-27 19:40:56,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:40:56,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1340141025, now seen corresponding path program 5 times [2024-06-27 19:40:56,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:40:56,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841881813] [2024-06-27 19:40:56,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:40:56,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:40:56,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:40:56,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:40:56,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:40:56,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841881813] [2024-06-27 19:40:56,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841881813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:40:56,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:40:56,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:40:56,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905657592] [2024-06-27 19:40:56,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:40:56,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:40:56,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:40:56,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:40:56,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:40:56,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:40:56,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 671 transitions, 11724 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:40:56,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:40:56,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:40:56,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:40:57,810 INFO L124 PetriNetUnfolderBase]: 3141/5326 cut-off events. [2024-06-27 19:40:57,810 INFO L125 PetriNetUnfolderBase]: For 1162770/1162770 co-relation queries the response was YES. [2024-06-27 19:40:57,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47624 conditions, 5326 events. 3141/5326 cut-off events. For 1162770/1162770 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 35794 event pairs, 644 based on Foata normal form. 2/5304 useless extension candidates. Maximal degree in co-relation 47402. Up to 4481 conditions per place. [2024-06-27 19:40:57,882 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 486 selfloop transitions, 201 changer transitions 0/695 dead transitions. [2024-06-27 19:40:57,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 695 transitions, 13250 flow [2024-06-27 19:40:57,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:40:57,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:40:57,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-27 19:40:57,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-27 19:40:57,883 INFO L175 Difference]: Start difference. First operand has 492 places, 671 transitions, 11724 flow. Second operand 8 states and 188 transitions. [2024-06-27 19:40:57,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 695 transitions, 13250 flow [2024-06-27 19:41:04,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 695 transitions, 13094 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-27 19:41:04,810 INFO L231 Difference]: Finished difference. Result has 497 places, 673 transitions, 12057 flow [2024-06-27 19:41:04,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11568, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12057, PETRI_PLACES=497, PETRI_TRANSITIONS=673} [2024-06-27 19:41:04,811 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 455 predicate places. [2024-06-27 19:41:04,811 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 673 transitions, 12057 flow [2024-06-27 19:41:04,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:41:04,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:41:04,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:41:04,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-27 19:41:04,812 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)] === [2024-06-27 19:41:04,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:41:04,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1000033047, now seen corresponding path program 7 times [2024-06-27 19:41:04,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:41:04,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779159586] [2024-06-27 19:41:04,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:41:04,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:41:04,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:41:04,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:41:04,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:41:04,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779159586] [2024-06-27 19:41:04,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779159586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:41:04,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:41:04,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:41:04,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266959391] [2024-06-27 19:41:04,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:41:04,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:41:04,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:41:04,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:41:04,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:41:04,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:41:04,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 673 transitions, 12057 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:41:04,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:41:04,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:41:04,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:41:06,414 INFO L124 PetriNetUnfolderBase]: 3149/5351 cut-off events. [2024-06-27 19:41:06,414 INFO L125 PetriNetUnfolderBase]: For 1182054/1182060 co-relation queries the response was YES. [2024-06-27 19:41:06,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48201 conditions, 5351 events. 3149/5351 cut-off events. For 1182054/1182060 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 36030 event pairs, 609 based on Foata normal form. 6/5347 useless extension candidates. Maximal degree in co-relation 47977. Up to 4639 conditions per place. [2024-06-27 19:41:06,484 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 595 selfloop transitions, 93 changer transitions 0/696 dead transitions. [2024-06-27 19:41:06,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 696 transitions, 13527 flow [2024-06-27 19:41:06,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:41:06,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:41:06,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-27 19:41:06,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-27 19:41:06,485 INFO L175 Difference]: Start difference. First operand has 497 places, 673 transitions, 12057 flow. Second operand 7 states and 166 transitions. [2024-06-27 19:41:06,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 696 transitions, 13527 flow [2024-06-27 19:41:14,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 696 transitions, 13054 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-27 19:41:14,115 INFO L231 Difference]: Finished difference. Result has 498 places, 675 transitions, 11801 flow [2024-06-27 19:41:14,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11584, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11801, PETRI_PLACES=498, PETRI_TRANSITIONS=675} [2024-06-27 19:41:14,115 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 456 predicate places. [2024-06-27 19:41:14,116 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 675 transitions, 11801 flow [2024-06-27 19:41:14,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:41:14,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:41:14,116 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] [2024-06-27 19:41:14,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-27 19:41:14,116 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:41:14,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:41:14,116 INFO L85 PathProgramCache]: Analyzing trace with hash 508615591, now seen corresponding path program 8 times [2024-06-27 19:41:14,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:41:14,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607985020] [2024-06-27 19:41:14,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:41:14,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:41:14,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:41:14,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:41:14,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:41:14,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607985020] [2024-06-27 19:41:14,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607985020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:41:14,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:41:14,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:41:14,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475643453] [2024-06-27 19:41:14,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:41:14,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:41:14,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:41:14,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:41:14,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:41:14,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:41:14,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 675 transitions, 11801 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:41:14,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:41:14,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:41:14,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:41:15,698 INFO L124 PetriNetUnfolderBase]: 3157/5379 cut-off events. [2024-06-27 19:41:15,698 INFO L125 PetriNetUnfolderBase]: For 1194216/1194222 co-relation queries the response was YES. [2024-06-27 19:41:15,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48065 conditions, 5379 events. 3157/5379 cut-off events. For 1194216/1194222 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 36387 event pairs, 527 based on Foata normal form. 6/5375 useless extension candidates. Maximal degree in co-relation 47840. Up to 4442 conditions per place. [2024-06-27 19:41:15,769 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 587 selfloop transitions, 117 changer transitions 0/712 dead transitions. [2024-06-27 19:41:15,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 712 transitions, 14025 flow [2024-06-27 19:41:15,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:41:15,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:41:15,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 19:41:15,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-27 19:41:15,771 INFO L175 Difference]: Start difference. First operand has 498 places, 675 transitions, 11801 flow. Second operand 7 states and 173 transitions. [2024-06-27 19:41:15,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 712 transitions, 14025 flow [2024-06-27 19:41:22,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 712 transitions, 13875 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 19:41:22,986 INFO L231 Difference]: Finished difference. Result has 502 places, 684 transitions, 12083 flow [2024-06-27 19:41:22,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11651, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12083, PETRI_PLACES=502, PETRI_TRANSITIONS=684} [2024-06-27 19:41:22,987 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 460 predicate places. [2024-06-27 19:41:22,987 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 684 transitions, 12083 flow [2024-06-27 19:41:22,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:41:22,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:41:22,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:41:22,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-27 19:41:22,988 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:41:22,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:41:22,988 INFO L85 PathProgramCache]: Analyzing trace with hash 795918631, now seen corresponding path program 9 times [2024-06-27 19:41:22,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:41:22,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558404223] [2024-06-27 19:41:22,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:41:22,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:41:22,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:41:23,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:41:23,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:41:23,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558404223] [2024-06-27 19:41:23,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558404223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:41:23,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:41:23,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:41:23,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15511524] [2024-06-27 19:41:23,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:41:23,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:41:23,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:41:23,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:41:23,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:41:23,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:41:23,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 684 transitions, 12083 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:41:23,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:41:23,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:41:23,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:41:24,894 INFO L124 PetriNetUnfolderBase]: 3165/5392 cut-off events. [2024-06-27 19:41:24,895 INFO L125 PetriNetUnfolderBase]: For 1211981/1211987 co-relation queries the response was YES. [2024-06-27 19:41:24,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48720 conditions, 5392 events. 3165/5392 cut-off events. For 1211981/1211987 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 36386 event pairs, 533 based on Foata normal form. 6/5388 useless extension candidates. Maximal degree in co-relation 48493. Up to 4450 conditions per place. [2024-06-27 19:41:24,969 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 584 selfloop transitions, 119 changer transitions 0/711 dead transitions. [2024-06-27 19:41:24,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 711 transitions, 13928 flow [2024-06-27 19:41:24,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:41:24,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:41:24,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-27 19:41:24,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-27 19:41:24,970 INFO L175 Difference]: Start difference. First operand has 502 places, 684 transitions, 12083 flow. Second operand 7 states and 169 transitions. [2024-06-27 19:41:24,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 711 transitions, 13928 flow [2024-06-27 19:41:33,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 711 transitions, 13712 flow, removed 59 selfloop flow, removed 2 redundant places. [2024-06-27 19:41:33,880 INFO L231 Difference]: Finished difference. Result has 507 places, 687 transitions, 12175 flow [2024-06-27 19:41:33,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11897, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12175, PETRI_PLACES=507, PETRI_TRANSITIONS=687} [2024-06-27 19:41:33,881 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 465 predicate places. [2024-06-27 19:41:33,881 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 687 transitions, 12175 flow [2024-06-27 19:41:33,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:41:33,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:41:33,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:41:33,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-27 19:41:33,881 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:41:33,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:41:33,882 INFO L85 PathProgramCache]: Analyzing trace with hash 909422341, now seen corresponding path program 10 times [2024-06-27 19:41:33,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:41:33,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034002050] [2024-06-27 19:41:33,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:41:33,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:41:33,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:41:33,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:41:33,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:41:33,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034002050] [2024-06-27 19:41:33,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034002050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:41:33,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:41:33,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:41:33,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966075766] [2024-06-27 19:41:33,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:41:33,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:41:33,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:41:33,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:41:33,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:41:33,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:41:33,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 687 transitions, 12175 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:41:33,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:41:33,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:41:33,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:41:35,494 INFO L124 PetriNetUnfolderBase]: 3186/5418 cut-off events. [2024-06-27 19:41:35,495 INFO L125 PetriNetUnfolderBase]: For 1248169/1248175 co-relation queries the response was YES. [2024-06-27 19:41:35,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49270 conditions, 5418 events. 3186/5418 cut-off events. For 1248169/1248175 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 36546 event pairs, 614 based on Foata normal form. 6/5414 useless extension candidates. Maximal degree in co-relation 49041. Up to 4665 conditions per place. [2024-06-27 19:41:35,573 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 603 selfloop transitions, 101 changer transitions 0/712 dead transitions. [2024-06-27 19:41:35,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 712 transitions, 14024 flow [2024-06-27 19:41:35,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:41:35,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:41:35,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-27 19:41:35,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5749128919860628 [2024-06-27 19:41:35,575 INFO L175 Difference]: Start difference. First operand has 507 places, 687 transitions, 12175 flow. Second operand 7 states and 165 transitions. [2024-06-27 19:41:35,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 712 transitions, 14024 flow [2024-06-27 19:41:44,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 712 transitions, 13819 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-27 19:41:44,021 INFO L231 Difference]: Finished difference. Result has 512 places, 692 transitions, 12276 flow [2024-06-27 19:41:44,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11975, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12276, PETRI_PLACES=512, PETRI_TRANSITIONS=692} [2024-06-27 19:41:44,021 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 470 predicate places. [2024-06-27 19:41:44,022 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 692 transitions, 12276 flow [2024-06-27 19:41:44,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:41:44,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:41:44,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:41:44,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-27 19:41:44,022 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:41:44,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:41:44,023 INFO L85 PathProgramCache]: Analyzing trace with hash 899899141, now seen corresponding path program 11 times [2024-06-27 19:41:44,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:41:44,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567410820] [2024-06-27 19:41:44,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:41:44,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:41:44,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:41:44,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:41:44,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:41:44,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567410820] [2024-06-27 19:41:44,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567410820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:41:44,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:41:44,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:41:44,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674573451] [2024-06-27 19:41:44,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:41:44,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:41:44,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:41:44,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:41:44,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:41:44,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:41:44,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 692 transitions, 12276 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:41:44,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:41:44,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:41:44,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:41:45,578 INFO L124 PetriNetUnfolderBase]: 3181/5415 cut-off events. [2024-06-27 19:41:45,579 INFO L125 PetriNetUnfolderBase]: For 1241623/1241629 co-relation queries the response was YES. [2024-06-27 19:41:45,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48994 conditions, 5415 events. 3181/5415 cut-off events. For 1241623/1241629 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 36673 event pairs, 617 based on Foata normal form. 6/5411 useless extension candidates. Maximal degree in co-relation 48763. Up to 4687 conditions per place. [2024-06-27 19:41:45,648 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 608 selfloop transitions, 94 changer transitions 0/710 dead transitions. [2024-06-27 19:41:45,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 710 transitions, 13740 flow [2024-06-27 19:41:45,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:41:45,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:41:45,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-27 19:41:45,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-27 19:41:45,649 INFO L175 Difference]: Start difference. First operand has 512 places, 692 transitions, 12276 flow. Second operand 7 states and 163 transitions. [2024-06-27 19:41:45,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 710 transitions, 13740 flow [2024-06-27 19:41:53,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 710 transitions, 13573 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-27 19:41:53,132 INFO L231 Difference]: Finished difference. Result has 516 places, 692 transitions, 12302 flow [2024-06-27 19:41:53,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12109, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=598, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12302, PETRI_PLACES=516, PETRI_TRANSITIONS=692} [2024-06-27 19:41:53,132 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 474 predicate places. [2024-06-27 19:41:53,132 INFO L495 AbstractCegarLoop]: Abstraction has has 516 places, 692 transitions, 12302 flow [2024-06-27 19:41:53,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:41:53,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:41:53,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:41:53,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-27 19:41:53,133 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:41:53,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:41:53,133 INFO L85 PathProgramCache]: Analyzing trace with hash 371898437, now seen corresponding path program 12 times [2024-06-27 19:41:53,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:41:53,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54624138] [2024-06-27 19:41:53,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:41:53,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:41:53,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:41:53,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:41:53,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:41:53,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54624138] [2024-06-27 19:41:53,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54624138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:41:53,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:41:53,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:41:53,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353947489] [2024-06-27 19:41:53,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:41:53,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:41:53,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:41:53,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:41:53,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:41:53,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:41:53,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 692 transitions, 12302 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:41:53,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:41:53,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:41:53,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:41:54,854 INFO L124 PetriNetUnfolderBase]: 3189/5411 cut-off events. [2024-06-27 19:41:54,855 INFO L125 PetriNetUnfolderBase]: For 1256497/1256497 co-relation queries the response was YES. [2024-06-27 19:41:54,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49132 conditions, 5411 events. 3189/5411 cut-off events. For 1256497/1256497 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 36492 event pairs, 612 based on Foata normal form. 2/5398 useless extension candidates. Maximal degree in co-relation 48900. Up to 4699 conditions per place. [2024-06-27 19:41:54,944 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 607 selfloop transitions, 98 changer transitions 0/713 dead transitions. [2024-06-27 19:41:54,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 713 transitions, 13812 flow [2024-06-27 19:41:54,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:41:54,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:41:54,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-27 19:41:54,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5579268292682927 [2024-06-27 19:41:54,957 INFO L175 Difference]: Start difference. First operand has 516 places, 692 transitions, 12302 flow. Second operand 8 states and 183 transitions. [2024-06-27 19:41:54,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 713 transitions, 13812 flow [2024-06-27 19:42:04,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 713 transitions, 13623 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 19:42:04,386 INFO L231 Difference]: Finished difference. Result has 519 places, 694 transitions, 12356 flow [2024-06-27 19:42:04,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12113, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=594, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12356, PETRI_PLACES=519, PETRI_TRANSITIONS=694} [2024-06-27 19:42:04,387 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 477 predicate places. [2024-06-27 19:42:04,387 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 694 transitions, 12356 flow [2024-06-27 19:42:04,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:42:04,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:42:04,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:42:04,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-27 19:42:04,387 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:42:04,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:42:04,388 INFO L85 PathProgramCache]: Analyzing trace with hash 867335051, now seen corresponding path program 13 times [2024-06-27 19:42:04,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:42:04,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924384003] [2024-06-27 19:42:04,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:42:04,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:42:04,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:42:04,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:42:04,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:42:04,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924384003] [2024-06-27 19:42:04,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924384003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:42:04,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:42:04,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:42:04,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895956360] [2024-06-27 19:42:04,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:42:04,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:42:04,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:42:04,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:42:04,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:42:04,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:42:04,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 694 transitions, 12356 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:42:04,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:42:04,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:42:04,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:42:06,216 INFO L124 PetriNetUnfolderBase]: 3210/5444 cut-off events. [2024-06-27 19:42:06,216 INFO L125 PetriNetUnfolderBase]: For 1295150/1295150 co-relation queries the response was YES. [2024-06-27 19:42:06,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49792 conditions, 5444 events. 3210/5444 cut-off events. For 1295150/1295150 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 36732 event pairs, 611 based on Foata normal form. 2/5429 useless extension candidates. Maximal degree in co-relation 49559. Up to 4695 conditions per place. [2024-06-27 19:42:06,293 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 605 selfloop transitions, 107 changer transitions 0/720 dead transitions. [2024-06-27 19:42:06,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 720 transitions, 14236 flow [2024-06-27 19:42:06,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:42:06,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:42:06,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-27 19:42:06,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5640243902439024 [2024-06-27 19:42:06,294 INFO L175 Difference]: Start difference. First operand has 519 places, 694 transitions, 12356 flow. Second operand 8 states and 185 transitions. [2024-06-27 19:42:06,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 720 transitions, 14236 flow [2024-06-27 19:42:15,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 720 transitions, 14021 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 19:42:15,259 INFO L231 Difference]: Finished difference. Result has 522 places, 699 transitions, 12469 flow [2024-06-27 19:42:15,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12141, PETRI_DIFFERENCE_MINUEND_PLACES=513, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=587, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12469, PETRI_PLACES=522, PETRI_TRANSITIONS=699} [2024-06-27 19:42:15,260 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 480 predicate places. [2024-06-27 19:42:15,260 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 699 transitions, 12469 flow [2024-06-27 19:42:15,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:42:15,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:42:15,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:42:15,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-27 19:42:15,261 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:42:15,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:42:15,261 INFO L85 PathProgramCache]: Analyzing trace with hash 601311341, now seen corresponding path program 14 times [2024-06-27 19:42:15,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:42:15,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534736953] [2024-06-27 19:42:15,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:42:15,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:42:15,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:42:15,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:42:15,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:42:15,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534736953] [2024-06-27 19:42:15,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534736953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:42:15,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:42:15,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:42:15,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802959799] [2024-06-27 19:42:15,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:42:15,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:42:15,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:42:15,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:42:15,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:42:15,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:42:15,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 699 transitions, 12469 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:42:15,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:42:15,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:42:15,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:42:16,993 INFO L124 PetriNetUnfolderBase]: 3205/5447 cut-off events. [2024-06-27 19:42:16,993 INFO L125 PetriNetUnfolderBase]: For 1288178/1288178 co-relation queries the response was YES. [2024-06-27 19:42:17,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49620 conditions, 5447 events. 3205/5447 cut-off events. For 1288178/1288178 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 36799 event pairs, 618 based on Foata normal form. 2/5434 useless extension candidates. Maximal degree in co-relation 49385. Up to 4723 conditions per place. [2024-06-27 19:42:17,071 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 613 selfloop transitions, 99 changer transitions 0/720 dead transitions. [2024-06-27 19:42:17,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 720 transitions, 13959 flow [2024-06-27 19:42:17,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:42:17,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:42:17,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 221 transitions. [2024-06-27 19:42:17,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390243902439025 [2024-06-27 19:42:17,073 INFO L175 Difference]: Start difference. First operand has 522 places, 699 transitions, 12469 flow. Second operand 10 states and 221 transitions. [2024-06-27 19:42:17,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 720 transitions, 13959 flow [2024-06-27 19:42:26,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 720 transitions, 13721 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 19:42:26,096 INFO L231 Difference]: Finished difference. Result has 527 places, 699 transitions, 12434 flow [2024-06-27 19:42:26,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12231, PETRI_DIFFERENCE_MINUEND_PLACES=517, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=699, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=600, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12434, PETRI_PLACES=527, PETRI_TRANSITIONS=699} [2024-06-27 19:42:26,097 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 485 predicate places. [2024-06-27 19:42:26,097 INFO L495 AbstractCegarLoop]: Abstraction has has 527 places, 699 transitions, 12434 flow [2024-06-27 19:42:26,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:42:26,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:42:26,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:42:26,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-27 19:42:26,098 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:42:26,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:42:26,098 INFO L85 PathProgramCache]: Analyzing trace with hash 750432929, now seen corresponding path program 6 times [2024-06-27 19:42:26,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:42:26,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646696128] [2024-06-27 19:42:26,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:42:26,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:42:26,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:42:26,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:42:26,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:42:26,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646696128] [2024-06-27 19:42:26,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646696128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:42:26,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:42:26,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:42:26,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091563738] [2024-06-27 19:42:26,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:42:26,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:42:26,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:42:26,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:42:26,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:42:26,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:42:26,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 527 places, 699 transitions, 12434 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:42:26,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:42:26,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:42:26,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:42:27,631 INFO L124 PetriNetUnfolderBase]: 3213/5469 cut-off events. [2024-06-27 19:42:27,632 INFO L125 PetriNetUnfolderBase]: For 1304731/1304741 co-relation queries the response was YES. [2024-06-27 19:42:27,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49809 conditions, 5469 events. 3213/5469 cut-off events. For 1304731/1304741 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 37102 event pairs, 614 based on Foata normal form. 2/5465 useless extension candidates. Maximal degree in co-relation 49573. Up to 4860 conditions per place. [2024-06-27 19:42:27,712 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 659 selfloop transitions, 50 changer transitions 0/717 dead transitions. [2024-06-27 19:42:27,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 717 transitions, 13976 flow [2024-06-27 19:42:27,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:42:27,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:42:27,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-27 19:42:27,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551829268292683 [2024-06-27 19:42:27,714 INFO L175 Difference]: Start difference. First operand has 527 places, 699 transitions, 12434 flow. Second operand 8 states and 181 transitions. [2024-06-27 19:42:27,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 717 transitions, 13976 flow [2024-06-27 19:42:36,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 717 transitions, 13773 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 19:42:36,805 INFO L231 Difference]: Finished difference. Result has 527 places, 701 transitions, 12420 flow [2024-06-27 19:42:36,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12231, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=699, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=649, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12420, PETRI_PLACES=527, PETRI_TRANSITIONS=701} [2024-06-27 19:42:36,806 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 485 predicate places. [2024-06-27 19:42:36,806 INFO L495 AbstractCegarLoop]: Abstraction has has 527 places, 701 transitions, 12420 flow [2024-06-27 19:42:36,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:42:36,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:42:36,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:42:36,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-27 19:42:36,807 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:42:36,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:42:36,807 INFO L85 PathProgramCache]: Analyzing trace with hash 765670049, now seen corresponding path program 7 times [2024-06-27 19:42:36,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:42:36,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187009849] [2024-06-27 19:42:36,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:42:36,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:42:36,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:42:36,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:42:36,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:42:36,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187009849] [2024-06-27 19:42:36,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187009849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:42:36,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:42:36,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:42:36,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940466807] [2024-06-27 19:42:36,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:42:36,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:42:36,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:42:36,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:42:36,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:42:36,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:42:36,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 527 places, 701 transitions, 12420 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:42:36,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:42:36,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:42:36,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:42:38,435 INFO L124 PetriNetUnfolderBase]: 3221/5475 cut-off events. [2024-06-27 19:42:38,436 INFO L125 PetriNetUnfolderBase]: For 1321927/1321937 co-relation queries the response was YES. [2024-06-27 19:42:38,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50012 conditions, 5475 events. 3221/5475 cut-off events. For 1321927/1321937 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 37095 event pairs, 608 based on Foata normal form. 2/5471 useless extension candidates. Maximal degree in co-relation 49775. Up to 4858 conditions per place. [2024-06-27 19:42:38,696 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 659 selfloop transitions, 54 changer transitions 0/721 dead transitions. [2024-06-27 19:42:38,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 721 transitions, 13978 flow [2024-06-27 19:42:38,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:42:38,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:42:38,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-27 19:42:38,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5447154471544715 [2024-06-27 19:42:38,698 INFO L175 Difference]: Start difference. First operand has 527 places, 701 transitions, 12420 flow. Second operand 9 states and 201 transitions. [2024-06-27 19:42:38,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 721 transitions, 13978 flow [2024-06-27 19:42:47,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 721 transitions, 13805 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-27 19:42:47,612 INFO L231 Difference]: Finished difference. Result has 530 places, 703 transitions, 12448 flow [2024-06-27 19:42:47,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12247, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=647, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12448, PETRI_PLACES=530, PETRI_TRANSITIONS=703} [2024-06-27 19:42:47,613 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 488 predicate places. [2024-06-27 19:42:47,613 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 703 transitions, 12448 flow [2024-06-27 19:42:47,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:42:47,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:42:47,614 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] [2024-06-27 19:42:47,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-27 19:42:47,614 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:42:47,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:42:47,614 INFO L85 PathProgramCache]: Analyzing trace with hash 322336259, now seen corresponding path program 8 times [2024-06-27 19:42:47,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:42:47,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087653683] [2024-06-27 19:42:47,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:42:47,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:42:47,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:42:47,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:42:47,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:42:47,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087653683] [2024-06-27 19:42:47,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087653683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:42:47,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:42:47,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:42:47,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088930559] [2024-06-27 19:42:47,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:42:47,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:42:47,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:42:47,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:42:47,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:42:47,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:42:47,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 530 places, 703 transitions, 12448 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:42:47,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:42:47,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:42:47,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:42:49,300 INFO L124 PetriNetUnfolderBase]: 3229/5474 cut-off events. [2024-06-27 19:42:49,301 INFO L125 PetriNetUnfolderBase]: For 1339805/1339805 co-relation queries the response was YES. [2024-06-27 19:42:49,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50244 conditions, 5474 events. 3229/5474 cut-off events. For 1339805/1339805 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 36999 event pairs, 652 based on Foata normal form. 2/5452 useless extension candidates. Maximal degree in co-relation 50006. Up to 4613 conditions per place. [2024-06-27 19:42:49,377 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 516 selfloop transitions, 200 changer transitions 0/724 dead transitions. [2024-06-27 19:42:49,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 724 transitions, 14030 flow [2024-06-27 19:42:49,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:42:49,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:42:49,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-27 19:42:49,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-27 19:42:49,378 INFO L175 Difference]: Start difference. First operand has 530 places, 703 transitions, 12448 flow. Second operand 8 states and 186 transitions. [2024-06-27 19:42:49,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 724 transitions, 14030 flow [2024-06-27 19:42:59,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 724 transitions, 13845 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-27 19:42:59,128 INFO L231 Difference]: Finished difference. Result has 531 places, 705 transitions, 12760 flow [2024-06-27 19:42:59,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12263, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=703, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12760, PETRI_PLACES=531, PETRI_TRANSITIONS=705} [2024-06-27 19:42:59,129 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 489 predicate places. [2024-06-27 19:42:59,129 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 705 transitions, 12760 flow [2024-06-27 19:42:59,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:42:59,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:42:59,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:42:59,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-27 19:42:59,130 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:42:59,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:42:59,130 INFO L85 PathProgramCache]: Analyzing trace with hash 401353383, now seen corresponding path program 15 times [2024-06-27 19:42:59,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:42:59,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583564654] [2024-06-27 19:42:59,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:42:59,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:42:59,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:42:59,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:42:59,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:42:59,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583564654] [2024-06-27 19:42:59,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583564654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:42:59,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:42:59,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:42:59,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953865333] [2024-06-27 19:42:59,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:42:59,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:42:59,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:42:59,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:42:59,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:42:59,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:42:59,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 705 transitions, 12760 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:42:59,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:42:59,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:42:59,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:43:00,842 INFO L124 PetriNetUnfolderBase]: 3224/5477 cut-off events. [2024-06-27 19:43:00,842 INFO L125 PetriNetUnfolderBase]: For 1328676/1328678 co-relation queries the response was YES. [2024-06-27 19:43:00,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50249 conditions, 5477 events. 3224/5477 cut-off events. For 1328676/1328678 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 37057 event pairs, 571 based on Foata normal form. 2/5477 useless extension candidates. Maximal degree in co-relation 50010. Up to 4508 conditions per place. [2024-06-27 19:43:00,922 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 621 selfloop transitions, 112 changer transitions 0/741 dead transitions. [2024-06-27 19:43:00,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 741 transitions, 14362 flow [2024-06-27 19:43:00,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:43:00,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:43:00,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-27 19:43:00,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 19:43:00,924 INFO L175 Difference]: Start difference. First operand has 531 places, 705 transitions, 12760 flow. Second operand 8 states and 205 transitions. [2024-06-27 19:43:00,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 741 transitions, 14362 flow [2024-06-27 19:43:08,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 532 places, 741 transitions, 13875 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-27 19:43:08,368 INFO L231 Difference]: Finished difference. Result has 533 places, 705 transitions, 12523 flow [2024-06-27 19:43:08,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12273, PETRI_DIFFERENCE_MINUEND_PLACES=525, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=593, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12523, PETRI_PLACES=533, PETRI_TRANSITIONS=705} [2024-06-27 19:43:08,369 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 491 predicate places. [2024-06-27 19:43:08,369 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 705 transitions, 12523 flow [2024-06-27 19:43:08,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:43:08,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:43:08,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:43:08,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-27 19:43:08,370 INFO L420 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:43:08,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:43:08,370 INFO L85 PathProgramCache]: Analyzing trace with hash 657853893, now seen corresponding path program 16 times [2024-06-27 19:43:08,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:43:08,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365571686] [2024-06-27 19:43:08,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:43:08,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:43:08,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:43:08,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:43:08,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:43:08,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365571686] [2024-06-27 19:43:08,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365571686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:43:08,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:43:08,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:43:08,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355872459] [2024-06-27 19:43:08,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:43:08,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:43:08,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:43:08,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:43:08,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:43:08,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:43:08,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 705 transitions, 12523 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:43:08,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:43:08,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:43:08,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:43:10,107 INFO L124 PetriNetUnfolderBase]: 3219/5468 cut-off events. [2024-06-27 19:43:10,107 INFO L125 PetriNetUnfolderBase]: For 1318764/1318764 co-relation queries the response was YES. [2024-06-27 19:43:10,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49801 conditions, 5468 events. 3219/5468 cut-off events. For 1318764/1318764 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 36993 event pairs, 589 based on Foata normal form. 2/5457 useless extension candidates. Maximal degree in co-relation 49561. Up to 4684 conditions per place. [2024-06-27 19:43:10,183 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 619 selfloop transitions, 105 changer transitions 0/732 dead transitions. [2024-06-27 19:43:10,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 732 transitions, 14063 flow [2024-06-27 19:43:10,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:43:10,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:43:10,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-27 19:43:10,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-27 19:43:10,184 INFO L175 Difference]: Start difference. First operand has 533 places, 705 transitions, 12523 flow. Second operand 7 states and 177 transitions. [2024-06-27 19:43:10,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 732 transitions, 14063 flow [2024-06-27 19:43:18,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 732 transitions, 13854 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 19:43:18,117 INFO L231 Difference]: Finished difference. Result has 534 places, 705 transitions, 12533 flow [2024-06-27 19:43:18,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12314, PETRI_DIFFERENCE_MINUEND_PLACES=527, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=600, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12533, PETRI_PLACES=534, PETRI_TRANSITIONS=705} [2024-06-27 19:43:18,118 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 492 predicate places. [2024-06-27 19:43:18,118 INFO L495 AbstractCegarLoop]: Abstraction has has 534 places, 705 transitions, 12533 flow [2024-06-27 19:43:18,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:43:18,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:43:18,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:43:18,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-27 19:43:18,119 INFO L420 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:43:18,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:43:18,119 INFO L85 PathProgramCache]: Analyzing trace with hash 667377093, now seen corresponding path program 17 times [2024-06-27 19:43:18,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:43:18,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972648837] [2024-06-27 19:43:18,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:43:18,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:43:18,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:43:18,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:43:18,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:43:18,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972648837] [2024-06-27 19:43:18,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972648837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:43:18,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:43:18,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:43:18,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992973548] [2024-06-27 19:43:18,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:43:18,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:43:18,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:43:18,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:43:18,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:43:18,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:43:18,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 705 transitions, 12533 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:43:18,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:43:18,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:43:18,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:43:19,898 INFO L124 PetriNetUnfolderBase]: 3214/5478 cut-off events. [2024-06-27 19:43:19,898 INFO L125 PetriNetUnfolderBase]: For 1279082/1279082 co-relation queries the response was YES. [2024-06-27 19:43:19,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49297 conditions, 5478 events. 3214/5478 cut-off events. For 1279082/1279082 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 37150 event pairs, 504 based on Foata normal form. 2/5467 useless extension candidates. Maximal degree in co-relation 49057. Up to 4412 conditions per place. [2024-06-27 19:43:19,973 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 608 selfloop transitions, 120 changer transitions 0/736 dead transitions. [2024-06-27 19:43:19,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 736 transitions, 14109 flow [2024-06-27 19:43:19,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:43:19,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:43:19,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-27 19:43:19,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306620209059234 [2024-06-27 19:43:19,974 INFO L175 Difference]: Start difference. First operand has 534 places, 705 transitions, 12533 flow. Second operand 7 states and 181 transitions. [2024-06-27 19:43:19,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 736 transitions, 14109 flow [2024-06-27 19:43:30,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 736 transitions, 13864 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 19:43:30,488 INFO L231 Difference]: Finished difference. Result has 535 places, 705 transitions, 12536 flow [2024-06-27 19:43:30,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12288, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12536, PETRI_PLACES=535, PETRI_TRANSITIONS=705} [2024-06-27 19:43:30,489 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 493 predicate places. [2024-06-27 19:43:30,489 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 705 transitions, 12536 flow [2024-06-27 19:43:30,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:43:30,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:43:30,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:43:30,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-27 19:43:30,491 INFO L420 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:43:30,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:43:30,491 INFO L85 PathProgramCache]: Analyzing trace with hash 401538081, now seen corresponding path program 9 times [2024-06-27 19:43:30,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:43:30,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360761426] [2024-06-27 19:43:30,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:43:30,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:43:30,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:43:30,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:43:30,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:43:30,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360761426] [2024-06-27 19:43:30,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360761426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:43:30,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:43:30,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:43:30,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142986953] [2024-06-27 19:43:30,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:43:30,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:43:30,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:43:30,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:43:30,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:43:30,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:43:30,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 705 transitions, 12536 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:43:30,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:43:30,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:43:30,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:43:32,260 INFO L124 PetriNetUnfolderBase]: 3222/5458 cut-off events. [2024-06-27 19:43:32,260 INFO L125 PetriNetUnfolderBase]: For 1296762/1296762 co-relation queries the response was YES. [2024-06-27 19:43:32,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49639 conditions, 5458 events. 3222/5458 cut-off events. For 1296762/1296762 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 36866 event pairs, 589 based on Foata normal form. 2/5447 useless extension candidates. Maximal degree in co-relation 49398. Up to 4577 conditions per place. [2024-06-27 19:43:32,339 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 535 selfloop transitions, 190 changer transitions 0/733 dead transitions. [2024-06-27 19:43:32,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 733 transitions, 14482 flow [2024-06-27 19:43:32,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:43:32,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:43:32,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-27 19:43:32,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-27 19:43:32,340 INFO L175 Difference]: Start difference. First operand has 535 places, 705 transitions, 12536 flow. Second operand 8 states and 197 transitions. [2024-06-27 19:43:32,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 733 transitions, 14482 flow [2024-06-27 19:43:41,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 733 transitions, 14231 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 19:43:41,923 INFO L231 Difference]: Finished difference. Result has 536 places, 707 transitions, 12766 flow [2024-06-27 19:43:41,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12285, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12766, PETRI_PLACES=536, PETRI_TRANSITIONS=707} [2024-06-27 19:43:41,923 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 494 predicate places. [2024-06-27 19:43:41,923 INFO L495 AbstractCegarLoop]: Abstraction has has 536 places, 707 transitions, 12766 flow [2024-06-27 19:43:41,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:43:41,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:43:41,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:43:41,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-27 19:43:41,924 INFO L420 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:43:41,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:43:41,924 INFO L85 PathProgramCache]: Analyzing trace with hash -623922143, now seen corresponding path program 10 times [2024-06-27 19:43:41,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:43:41,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001224836] [2024-06-27 19:43:41,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:43:41,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:43:41,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:43:42,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:43:42,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:43:42,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001224836] [2024-06-27 19:43:42,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001224836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:43:42,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:43:42,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:43:42,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065426939] [2024-06-27 19:43:42,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:43:42,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:43:42,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:43:42,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:43:42,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:43:42,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:43:42,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 707 transitions, 12766 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:43:42,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:43:42,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:43:42,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:43:43,684 INFO L124 PetriNetUnfolderBase]: 3258/5540 cut-off events. [2024-06-27 19:43:43,684 INFO L125 PetriNetUnfolderBase]: For 1425145/1425147 co-relation queries the response was YES. [2024-06-27 19:43:43,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50694 conditions, 5540 events. 3258/5540 cut-off events. For 1425145/1425147 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 37529 event pairs, 585 based on Foata normal form. 10/5548 useless extension candidates. Maximal degree in co-relation 50454. Up to 4563 conditions per place. [2024-06-27 19:43:43,761 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 545 selfloop transitions, 191 changer transitions 0/744 dead transitions. [2024-06-27 19:43:43,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 744 transitions, 14788 flow [2024-06-27 19:43:43,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:43:43,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:43:43,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-27 19:43:43,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6151761517615176 [2024-06-27 19:43:43,762 INFO L175 Difference]: Start difference. First operand has 536 places, 707 transitions, 12766 flow. Second operand 9 states and 227 transitions. [2024-06-27 19:43:43,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 744 transitions, 14788 flow [2024-06-27 19:43:53,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 538 places, 744 transitions, 14323 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-27 19:43:53,294 INFO L231 Difference]: Finished difference. Result has 539 places, 709 transitions, 12795 flow [2024-06-27 19:43:53,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12301, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12795, PETRI_PLACES=539, PETRI_TRANSITIONS=709} [2024-06-27 19:43:53,295 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 497 predicate places. [2024-06-27 19:43:53,295 INFO L495 AbstractCegarLoop]: Abstraction has has 539 places, 709 transitions, 12795 flow [2024-06-27 19:43:53,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:43:53,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:43:53,295 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] [2024-06-27 19:43:53,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-27 19:43:53,296 INFO L420 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:43:53,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:43:53,296 INFO L85 PathProgramCache]: Analyzing trace with hash 414050301, now seen corresponding path program 11 times [2024-06-27 19:43:53,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:43:53,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030599828] [2024-06-27 19:43:53,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:43:53,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:43:53,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:43:53,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:43:53,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:43:53,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030599828] [2024-06-27 19:43:53,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030599828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:43:53,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:43:53,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:43:53,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585199666] [2024-06-27 19:43:53,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:43:53,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:43:53,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:43:53,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:43:53,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:43:53,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:43:53,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 709 transitions, 12795 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:43:53,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:43:53,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:43:53,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:43:55,088 INFO L124 PetriNetUnfolderBase]: 3266/5553 cut-off events. [2024-06-27 19:43:55,089 INFO L125 PetriNetUnfolderBase]: For 1343453/1343463 co-relation queries the response was YES. [2024-06-27 19:43:55,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50998 conditions, 5553 events. 3266/5553 cut-off events. For 1343453/1343463 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 37687 event pairs, 602 based on Foata normal form. 2/5553 useless extension candidates. Maximal degree in co-relation 50757. Up to 4964 conditions per place. [2024-06-27 19:43:55,167 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 689 selfloop transitions, 33 changer transitions 0/730 dead transitions. [2024-06-27 19:43:55,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 730 transitions, 14393 flow [2024-06-27 19:43:55,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:43:55,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:43:55,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-27 19:43:55,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5640243902439024 [2024-06-27 19:43:55,169 INFO L175 Difference]: Start difference. First operand has 539 places, 709 transitions, 12795 flow. Second operand 8 states and 185 transitions. [2024-06-27 19:43:55,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 730 transitions, 14393 flow [2024-06-27 19:44:07,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 539 places, 730 transitions, 13941 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-27 19:44:07,080 INFO L231 Difference]: Finished difference. Result has 540 places, 711 transitions, 12518 flow [2024-06-27 19:44:07,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12343, PETRI_DIFFERENCE_MINUEND_PLACES=532, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=676, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12518, PETRI_PLACES=540, PETRI_TRANSITIONS=711} [2024-06-27 19:44:07,086 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 498 predicate places. [2024-06-27 19:44:07,087 INFO L495 AbstractCegarLoop]: Abstraction has has 540 places, 711 transitions, 12518 flow [2024-06-27 19:44:07,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:44:07,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:44:07,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:44:07,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2024-06-27 19:44:07,087 INFO L420 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:44:07,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:44:07,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1311981539, now seen corresponding path program 12 times [2024-06-27 19:44:07,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:44:07,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767244929] [2024-06-27 19:44:07,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:44:07,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:44:07,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:44:07,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:44:07,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:44:07,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767244929] [2024-06-27 19:44:07,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767244929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:44:07,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:44:07,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:44:07,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351425537] [2024-06-27 19:44:07,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:44:07,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:44:07,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:44:07,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:44:07,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:44:07,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:44:07,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 711 transitions, 12518 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:44:07,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:44:07,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:44:07,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:44:08,885 INFO L124 PetriNetUnfolderBase]: 3274/5562 cut-off events. [2024-06-27 19:44:08,886 INFO L125 PetriNetUnfolderBase]: For 1347581/1347583 co-relation queries the response was YES. [2024-06-27 19:44:08,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50360 conditions, 5562 events. 3274/5562 cut-off events. For 1347581/1347583 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 37714 event pairs, 597 based on Foata normal form. 2/5561 useless extension candidates. Maximal degree in co-relation 50118. Up to 4852 conditions per place. [2024-06-27 19:44:08,967 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 647 selfloop transitions, 84 changer transitions 0/739 dead transitions. [2024-06-27 19:44:08,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 739 transitions, 14170 flow [2024-06-27 19:44:08,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:44:08,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:44:08,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-27 19:44:08,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-27 19:44:08,968 INFO L175 Difference]: Start difference. First operand has 540 places, 711 transitions, 12518 flow. Second operand 7 states and 177 transitions. [2024-06-27 19:44:08,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 739 transitions, 14170 flow [2024-06-27 19:44:18,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 540 places, 739 transitions, 14011 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-27 19:44:18,116 INFO L231 Difference]: Finished difference. Result has 541 places, 713 transitions, 12640 flow [2024-06-27 19:44:18,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12359, PETRI_DIFFERENCE_MINUEND_PLACES=534, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=627, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12640, PETRI_PLACES=541, PETRI_TRANSITIONS=713} [2024-06-27 19:44:18,116 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 499 predicate places. [2024-06-27 19:44:18,116 INFO L495 AbstractCegarLoop]: Abstraction has has 541 places, 713 transitions, 12640 flow [2024-06-27 19:44:18,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:44:18,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:44:18,117 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] [2024-06-27 19:44:18,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2024-06-27 19:44:18,117 INFO L420 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:44:18,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:44:18,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1303410659, now seen corresponding path program 13 times [2024-06-27 19:44:18,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:44:18,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967293104] [2024-06-27 19:44:18,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:44:18,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:44:18,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:44:18,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:44:18,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:44:18,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967293104] [2024-06-27 19:44:18,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967293104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:44:18,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:44:18,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:44:18,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485499831] [2024-06-27 19:44:18,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:44:18,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:44:18,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:44:18,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:44:18,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:44:18,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:44:18,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 541 places, 713 transitions, 12640 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:44:18,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:44:18,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:44:18,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:44:20,065 INFO L124 PetriNetUnfolderBase]: 3341/5653 cut-off events. [2024-06-27 19:44:20,066 INFO L125 PetriNetUnfolderBase]: For 1507886/1507888 co-relation queries the response was YES. [2024-06-27 19:44:20,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53342 conditions, 5653 events. 3341/5653 cut-off events. For 1507886/1507888 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 38306 event pairs, 596 based on Foata normal form. 2/5653 useless extension candidates. Maximal degree in co-relation 53099. Up to 4793 conditions per place. [2024-06-27 19:44:20,150 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 651 selfloop transitions, 89 changer transitions 0/748 dead transitions. [2024-06-27 19:44:20,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 547 places, 748 transitions, 14786 flow [2024-06-27 19:44:20,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:44:20,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:44:20,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-27 19:44:20,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-27 19:44:20,151 INFO L175 Difference]: Start difference. First operand has 541 places, 713 transitions, 12640 flow. Second operand 7 states and 182 transitions. [2024-06-27 19:44:20,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 547 places, 748 transitions, 14786 flow [2024-06-27 19:44:29,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 542 places, 748 transitions, 14521 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-27 19:44:29,350 INFO L231 Difference]: Finished difference. Result has 544 places, 717 transitions, 12752 flow [2024-06-27 19:44:29,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12375, PETRI_DIFFERENCE_MINUEND_PLACES=536, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12752, PETRI_PLACES=544, PETRI_TRANSITIONS=717} [2024-06-27 19:44:29,351 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 502 predicate places. [2024-06-27 19:44:29,351 INFO L495 AbstractCegarLoop]: Abstraction has has 544 places, 717 transitions, 12752 flow [2024-06-27 19:44:29,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:44:29,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:44:29,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:44:29,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2024-06-27 19:44:29,352 INFO L420 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:44:29,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:44:29,352 INFO L85 PathProgramCache]: Analyzing trace with hash -396020993, now seen corresponding path program 14 times [2024-06-27 19:44:29,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:44:29,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498422804] [2024-06-27 19:44:29,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:44:29,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:44:29,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:44:29,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:44:29,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:44:29,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498422804] [2024-06-27 19:44:29,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498422804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:44:29,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:44:29,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:44:29,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907429823] [2024-06-27 19:44:29,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:44:29,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:44:29,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:44:29,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:44:29,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:44:29,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:44:29,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 544 places, 717 transitions, 12752 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:44:29,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:44:29,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:44:29,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:44:31,095 INFO L124 PetriNetUnfolderBase]: 3377/5719 cut-off events. [2024-06-27 19:44:31,095 INFO L125 PetriNetUnfolderBase]: For 1641854/1641856 co-relation queries the response was YES. [2024-06-27 19:44:31,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54452 conditions, 5719 events. 3377/5719 cut-off events. For 1641854/1641856 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 38898 event pairs, 598 based on Foata normal form. 10/5727 useless extension candidates. Maximal degree in co-relation 54207. Up to 4744 conditions per place. [2024-06-27 19:44:31,178 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 556 selfloop transitions, 187 changer transitions 0/751 dead transitions. [2024-06-27 19:44:31,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 751 transitions, 14798 flow [2024-06-27 19:44:31,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:44:31,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:44:31,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 243 transitions. [2024-06-27 19:44:31,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5926829268292683 [2024-06-27 19:44:31,180 INFO L175 Difference]: Start difference. First operand has 544 places, 717 transitions, 12752 flow. Second operand 10 states and 243 transitions. [2024-06-27 19:44:31,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 751 transitions, 14798 flow [2024-06-27 19:44:42,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 550 places, 751 transitions, 14596 flow, removed 57 selfloop flow, removed 3 redundant places. [2024-06-27 19:44:42,263 INFO L231 Difference]: Finished difference. Result has 551 places, 719 transitions, 13052 flow [2024-06-27 19:44:42,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12550, PETRI_DIFFERENCE_MINUEND_PLACES=541, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=717, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13052, PETRI_PLACES=551, PETRI_TRANSITIONS=719} [2024-06-27 19:44:42,263 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 509 predicate places. [2024-06-27 19:44:42,263 INFO L495 AbstractCegarLoop]: Abstraction has has 551 places, 719 transitions, 13052 flow [2024-06-27 19:44:42,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:44:42,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:44:42,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:44:42,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2024-06-27 19:44:42,264 INFO L420 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:44:42,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:44:42,264 INFO L85 PathProgramCache]: Analyzing trace with hash 2020706097, now seen corresponding path program 15 times [2024-06-27 19:44:42,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:44:42,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570714619] [2024-06-27 19:44:42,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:44:42,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:44:42,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:44:42,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:44:42,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:44:42,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570714619] [2024-06-27 19:44:42,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570714619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:44:42,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:44:42,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:44:42,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550350715] [2024-06-27 19:44:42,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:44:42,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:44:42,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:44:42,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:44:42,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:44:42,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:44:42,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 551 places, 719 transitions, 13052 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:44:42,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:44:42,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:44:42,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:44:44,151 INFO L124 PetriNetUnfolderBase]: 3372/5716 cut-off events. [2024-06-27 19:44:44,152 INFO L125 PetriNetUnfolderBase]: For 1525648/1525650 co-relation queries the response was YES. [2024-06-27 19:44:44,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54424 conditions, 5716 events. 3372/5716 cut-off events. For 1525648/1525650 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 38940 event pairs, 615 based on Foata normal form. 2/5715 useless extension candidates. Maximal degree in co-relation 54177. Up to 4996 conditions per place. [2024-06-27 19:44:44,237 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 652 selfloop transitions, 95 changer transitions 0/755 dead transitions. [2024-06-27 19:44:44,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 559 places, 755 transitions, 14769 flow [2024-06-27 19:44:44,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:44:44,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:44:44,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-06-27 19:44:44,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6043360433604336 [2024-06-27 19:44:44,238 INFO L175 Difference]: Start difference. First operand has 551 places, 719 transitions, 13052 flow. Second operand 9 states and 223 transitions. [2024-06-27 19:44:44,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 559 places, 755 transitions, 14769 flow [2024-06-27 19:44:53,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 551 places, 755 transitions, 14309 flow, removed 48 selfloop flow, removed 8 redundant places. [2024-06-27 19:44:53,945 INFO L231 Difference]: Finished difference. Result has 552 places, 721 transitions, 12905 flow [2024-06-27 19:44:53,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12592, PETRI_DIFFERENCE_MINUEND_PLACES=543, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=719, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=624, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12905, PETRI_PLACES=552, PETRI_TRANSITIONS=721} [2024-06-27 19:44:53,946 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 510 predicate places. [2024-06-27 19:44:53,946 INFO L495 AbstractCegarLoop]: Abstraction has has 552 places, 721 transitions, 12905 flow [2024-06-27 19:44:53,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:44:53,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:44:53,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:44:53,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2024-06-27 19:44:53,947 INFO L420 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:44:53,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:44:53,947 INFO L85 PathProgramCache]: Analyzing trace with hash 814544925, now seen corresponding path program 16 times [2024-06-27 19:44:53,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:44:53,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63177093] [2024-06-27 19:44:53,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:44:53,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:44:53,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:44:54,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:44:54,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:44:54,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63177093] [2024-06-27 19:44:54,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63177093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:44:54,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:44:54,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:44:54,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149259500] [2024-06-27 19:44:54,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:44:54,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:44:54,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:44:54,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:44:54,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:44:54,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:44:54,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 552 places, 721 transitions, 12905 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:44:54,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:44:54,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:44:54,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:44:55,830 INFO L124 PetriNetUnfolderBase]: 3380/5726 cut-off events. [2024-06-27 19:44:55,830 INFO L125 PetriNetUnfolderBase]: For 1532953/1532955 co-relation queries the response was YES. [2024-06-27 19:44:55,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53929 conditions, 5726 events. 3380/5726 cut-off events. For 1532953/1532955 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 38967 event pairs, 613 based on Foata normal form. 2/5725 useless extension candidates. Maximal degree in co-relation 53681. Up to 4986 conditions per place. [2024-06-27 19:44:55,918 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 646 selfloop transitions, 101 changer transitions 0/755 dead transitions. [2024-06-27 19:44:55,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 560 places, 755 transitions, 14619 flow [2024-06-27 19:44:55,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:44:55,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:44:55,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-27 19:44:55,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-27 19:44:55,919 INFO L175 Difference]: Start difference. First operand has 552 places, 721 transitions, 12905 flow. Second operand 9 states and 219 transitions. [2024-06-27 19:44:55,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 560 places, 755 transitions, 14619 flow [2024-06-27 19:45:06,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 553 places, 755 transitions, 14335 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-06-27 19:45:07,004 INFO L231 Difference]: Finished difference. Result has 554 places, 723 transitions, 12950 flow [2024-06-27 19:45:07,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12621, PETRI_DIFFERENCE_MINUEND_PLACES=545, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=721, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12950, PETRI_PLACES=554, PETRI_TRANSITIONS=723} [2024-06-27 19:45:07,005 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 512 predicate places. [2024-06-27 19:45:07,005 INFO L495 AbstractCegarLoop]: Abstraction has has 554 places, 723 transitions, 12950 flow [2024-06-27 19:45:07,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:07,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:07,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:07,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2024-06-27 19:45:07,005 INFO L420 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:45:07,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:07,006 INFO L85 PathProgramCache]: Analyzing trace with hash 454559773, now seen corresponding path program 17 times [2024-06-27 19:45:07,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:07,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095275668] [2024-06-27 19:45:07,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:07,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:07,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:07,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:07,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:07,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095275668] [2024-06-27 19:45:07,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095275668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:07,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:07,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:45:07,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474587517] [2024-06-27 19:45:07,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:07,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:45:07,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:07,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:45:07,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:45:07,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:45:07,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 554 places, 723 transitions, 12950 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:07,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:07,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:45:07,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:08,895 INFO L124 PetriNetUnfolderBase]: 3467/5897 cut-off events. [2024-06-27 19:45:08,895 INFO L125 PetriNetUnfolderBase]: For 1697895/1697897 co-relation queries the response was YES. [2024-06-27 19:45:08,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57142 conditions, 5897 events. 3467/5897 cut-off events. For 1697895/1697897 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 40488 event pairs, 528 based on Foata normal form. 2/5897 useless extension candidates. Maximal degree in co-relation 56893. Up to 4732 conditions per place. [2024-06-27 19:45:08,982 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 654 selfloop transitions, 106 changer transitions 0/768 dead transitions. [2024-06-27 19:45:08,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 768 transitions, 15552 flow [2024-06-27 19:45:08,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:45:08,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:45:08,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-27 19:45:08,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2024-06-27 19:45:08,983 INFO L175 Difference]: Start difference. First operand has 554 places, 723 transitions, 12950 flow. Second operand 8 states and 212 transitions. [2024-06-27 19:45:08,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 561 places, 768 transitions, 15552 flow [2024-06-27 19:45:20,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 554 places, 768 transitions, 15239 flow, removed 57 selfloop flow, removed 7 redundant places. [2024-06-27 19:45:20,649 INFO L231 Difference]: Finished difference. Result has 557 places, 728 transitions, 13105 flow [2024-06-27 19:45:20,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12637, PETRI_DIFFERENCE_MINUEND_PLACES=547, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=618, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13105, PETRI_PLACES=557, PETRI_TRANSITIONS=728} [2024-06-27 19:45:20,650 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 515 predicate places. [2024-06-27 19:45:20,650 INFO L495 AbstractCegarLoop]: Abstraction has has 557 places, 728 transitions, 13105 flow [2024-06-27 19:45:20,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:20,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:20,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:20,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2024-06-27 19:45:20,650 INFO L420 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:45:20,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:20,651 INFO L85 PathProgramCache]: Analyzing trace with hash -92666459, now seen corresponding path program 18 times [2024-06-27 19:45:20,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:20,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38172601] [2024-06-27 19:45:20,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:20,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:20,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:20,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:20,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:20,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38172601] [2024-06-27 19:45:20,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38172601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:20,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:20,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:45:20,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120893615] [2024-06-27 19:45:20,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:20,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:45:20,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:20,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:45:20,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:45:20,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:45:20,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 557 places, 728 transitions, 13105 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:20,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:20,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:45:20,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:22,760 INFO L124 PetriNetUnfolderBase]: 3663/6199 cut-off events. [2024-06-27 19:45:22,760 INFO L125 PetriNetUnfolderBase]: For 2263339/2263341 co-relation queries the response was YES. [2024-06-27 19:45:22,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65024 conditions, 6199 events. 3663/6199 cut-off events. For 2263339/2263341 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 42449 event pairs, 716 based on Foata normal form. 10/6207 useless extension candidates. Maximal degree in co-relation 64772. Up to 4214 conditions per place. [2024-06-27 19:45:22,857 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 568 selfloop transitions, 195 changer transitions 0/771 dead transitions. [2024-06-27 19:45:22,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 566 places, 771 transitions, 15657 flow [2024-06-27 19:45:22,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:45:22,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:45:22,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 249 transitions. [2024-06-27 19:45:22,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6073170731707317 [2024-06-27 19:45:22,858 INFO L175 Difference]: Start difference. First operand has 557 places, 728 transitions, 13105 flow. Second operand 10 states and 249 transitions. [2024-06-27 19:45:22,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 566 places, 771 transitions, 15657 flow [2024-06-27 19:45:37,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 562 places, 771 transitions, 15379 flow, removed 65 selfloop flow, removed 4 redundant places. [2024-06-27 19:45:37,015 INFO L231 Difference]: Finished difference. Result has 564 places, 732 transitions, 13477 flow [2024-06-27 19:45:37,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12831, PETRI_DIFFERENCE_MINUEND_PLACES=553, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=728, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13477, PETRI_PLACES=564, PETRI_TRANSITIONS=732} [2024-06-27 19:45:37,015 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 522 predicate places. [2024-06-27 19:45:37,016 INFO L495 AbstractCegarLoop]: Abstraction has has 564 places, 732 transitions, 13477 flow [2024-06-27 19:45:37,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:37,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:37,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:37,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2024-06-27 19:45:37,016 INFO L420 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:45:37,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:37,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1108562069, now seen corresponding path program 19 times [2024-06-27 19:45:37,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:37,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366448045] [2024-06-27 19:45:37,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:37,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:37,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:37,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:37,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:37,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366448045] [2024-06-27 19:45:37,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366448045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:37,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:37,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:45:37,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263909200] [2024-06-27 19:45:37,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:37,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:45:37,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:37,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:45:37,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:45:37,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:45:37,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 564 places, 732 transitions, 13477 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:37,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:37,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:45:37,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:39,062 INFO L124 PetriNetUnfolderBase]: 3658/6181 cut-off events. [2024-06-27 19:45:39,063 INFO L125 PetriNetUnfolderBase]: For 2186756/2186758 co-relation queries the response was YES. [2024-06-27 19:45:39,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64927 conditions, 6181 events. 3658/6181 cut-off events. For 2186756/2186758 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 42449 event pairs, 655 based on Foata normal form. 2/6181 useless extension candidates. Maximal degree in co-relation 64673. Up to 5042 conditions per place. [2024-06-27 19:45:39,158 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 652 selfloop transitions, 106 changer transitions 0/766 dead transitions. [2024-06-27 19:45:39,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 571 places, 766 transitions, 15568 flow [2024-06-27 19:45:39,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:45:39,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:45:39,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-27 19:45:39,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6189024390243902 [2024-06-27 19:45:39,159 INFO L175 Difference]: Start difference. First operand has 564 places, 732 transitions, 13477 flow. Second operand 8 states and 203 transitions. [2024-06-27 19:45:39,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 571 places, 766 transitions, 15568 flow [2024-06-27 19:45:52,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 565 places, 766 transitions, 15222 flow, removed 63 selfloop flow, removed 6 redundant places. [2024-06-27 19:45:52,549 INFO L231 Difference]: Finished difference. Result has 566 places, 734 transitions, 13475 flow [2024-06-27 19:45:52,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13135, PETRI_DIFFERENCE_MINUEND_PLACES=558, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=732, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=627, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13475, PETRI_PLACES=566, PETRI_TRANSITIONS=734} [2024-06-27 19:45:52,550 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 524 predicate places. [2024-06-27 19:45:52,550 INFO L495 AbstractCegarLoop]: Abstraction has has 566 places, 734 transitions, 13475 flow [2024-06-27 19:45:52,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:52,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:52,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:52,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2024-06-27 19:45:52,550 INFO L420 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:45:52,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:52,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1744598859, now seen corresponding path program 1 times [2024-06-27 19:45:52,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:52,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18086711] [2024-06-27 19:45:52,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:52,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:52,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:52,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:52,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:52,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18086711] [2024-06-27 19:45:52,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18086711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:52,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:52,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:45:52,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864517322] [2024-06-27 19:45:52,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:52,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:45:52,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:52,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:45:52,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:45:52,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-27 19:45:52,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 566 places, 734 transitions, 13475 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:52,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:52,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-27 19:45:52,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:54,699 INFO L124 PetriNetUnfolderBase]: 3738/6323 cut-off events. [2024-06-27 19:45:54,700 INFO L125 PetriNetUnfolderBase]: For 2343857/2343857 co-relation queries the response was YES. [2024-06-27 19:45:54,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67550 conditions, 6323 events. 3738/6323 cut-off events. For 2343857/2343857 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 43558 event pairs, 661 based on Foata normal form. 2/6314 useless extension candidates. Maximal degree in co-relation 67294. Up to 5072 conditions per place. [2024-06-27 19:45:54,797 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 704 selfloop transitions, 72 changer transitions 0/784 dead transitions. [2024-06-27 19:45:54,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 574 places, 784 transitions, 16149 flow [2024-06-27 19:45:54,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:45:54,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:45:54,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-27 19:45:54,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6124661246612466 [2024-06-27 19:45:54,798 INFO L175 Difference]: Start difference. First operand has 566 places, 734 transitions, 13475 flow. Second operand 9 states and 226 transitions. [2024-06-27 19:45:54,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 574 places, 784 transitions, 16149 flow Killed by 15