./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-chromosome-opt-symm.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/chl-chromosome-opt-symm.wvr.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/weaver/chl-chromosome-opt-symm.wvr.c ./goblint.2024-06-19_11-23-25.files/protection/chl-chromosome-opt-symm.wvr.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 18:01:58,936 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 18:01:59,012 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 18:01:59,018 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 18:01:59,018 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 18:01:59,060 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 18:01:59,061 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 18:01:59,061 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 18:01:59,062 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 18:01:59,065 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 18:01:59,065 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 18:01:59,065 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 18:01:59,066 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 18:01:59,067 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 18:01:59,067 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 18:01:59,067 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 18:01:59,067 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 18:01:59,067 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 18:01:59,068 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 18:01:59,068 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 18:01:59,069 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 18:01:59,069 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 18:01:59,074 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 18:01:59,074 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 18:01:59,074 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 18:01:59,074 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 18:01:59,074 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 18:01:59,075 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 18:01:59,075 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 18:01:59,075 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 18:01:59,076 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 18:01:59,076 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 18:01:59,077 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:01:59,077 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 18:01:59,077 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 18:01:59,077 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 18:01:59,077 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 18:01:59,077 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 18:01:59,078 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 18:01:59,078 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 18:01:59,078 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 18:01:59,078 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 18:01:59,078 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 18:01:59,078 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 18:01:59,299 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 18:01:59,322 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 18:01:59,324 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 18:01:59,325 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 18:01:59,326 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 18:01:59,327 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/chl-chromosome-opt-symm.wvr.yml/witness.yml [2024-06-27 18:01:59,409 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 18:01:59,410 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 18:01:59,411 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-chromosome-opt-symm.wvr.c [2024-06-27 18:02:00,455 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 18:02:00,639 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 18:02:00,639 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-opt-symm.wvr.c [2024-06-27 18:02:00,646 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b590c5a01/c6f8d6f542694b1fa01c8d222931fe6e/FLAG6eb78ec91 [2024-06-27 18:02:00,661 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b590c5a01/c6f8d6f542694b1fa01c8d222931fe6e [2024-06-27 18:02:00,662 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 18:02:00,663 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 18:02:00,665 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 18:02:00,666 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 18:02:00,670 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 18:02:00,671 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:01:59" (1/2) ... [2024-06-27 18:02:00,671 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58ec81a0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:02:00, skipping insertion in model container [2024-06-27 18:02:00,671 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:01:59" (1/2) ... [2024-06-27 18:02:00,674 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@51e15961 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:02:00, skipping insertion in model container [2024-06-27 18:02:00,674 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:02:00" (2/2) ... [2024-06-27 18:02:00,675 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58ec81a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:02:00, skipping insertion in model container [2024-06-27 18:02:00,675 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:02:00" (2/2) ... [2024-06-27 18:02:00,676 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 18:02:00,694 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 18:02:00,695 INFO L97 edCorrectnessWitness]: Location invariant before [L89-L89] (! multithreaded || ((res1 == -1 || res1 == 0) || res1 == 1)) && (! multithreaded || ((res2 == -1 || res2 == 0) || res2 == 1)) [2024-06-27 18:02:00,696 INFO L97 edCorrectnessWitness]: Location invariant before [L88-L88] (! multithreaded || ((res1 == -1 || res1 == 0) || res1 == 1)) && (! multithreaded || ((res2 == -1 || res2 == 0) || res2 == 1)) [2024-06-27 18:02:00,696 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 18:02:00,696 INFO L106 edCorrectnessWitness]: ghost_update [L87-L87] multithreaded = 1; [2024-06-27 18:02:00,714 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 18:02:00,875 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-opt-symm.wvr.c[2592,2605] [2024-06-27 18:02:00,886 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:02:00,892 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 18:02:00,955 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-opt-symm.wvr.c[2592,2605] [2024-06-27 18:02:00,958 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:02:00,972 INFO L206 MainTranslator]: Completed translation [2024-06-27 18:02:00,973 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:02:00 WrapperNode [2024-06-27 18:02:00,973 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 18:02:00,974 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 18:02:00,974 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 18:02:00,974 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 18:02:00,979 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:02:00" (1/1) ... [2024-06-27 18:02:00,995 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:02:00" (1/1) ... [2024-06-27 18:02:01,028 INFO L138 Inliner]: procedures = 23, calls = 25, calls flagged for inlining = 9, calls inlined = 11, statements flattened = 174 [2024-06-27 18:02:01,028 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 18:02:01,030 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 18:02:01,030 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 18:02:01,030 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 18:02:01,078 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:02:00" (1/1) ... [2024-06-27 18:02:01,079 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:02:00" (1/1) ... [2024-06-27 18:02:01,089 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:02:00" (1/1) ... [2024-06-27 18:02:01,148 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-06-27 18:02:01,149 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:02:00" (1/1) ... [2024-06-27 18:02:01,149 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:02:00" (1/1) ... [2024-06-27 18:02:01,157 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:02:00" (1/1) ... [2024-06-27 18:02:01,163 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:02:00" (1/1) ... [2024-06-27 18:02:01,166 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:02:00" (1/1) ... [2024-06-27 18:02:01,167 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:02:00" (1/1) ... [2024-06-27 18:02:01,169 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 18:02:01,169 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 18:02:01,169 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 18:02:01,169 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 18:02:01,172 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:02:00" (1/1) ... [2024-06-27 18:02:01,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:02:01,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:02:01,196 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 18:02:01,202 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 18:02:01,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 18:02:01,226 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-27 18:02:01,226 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-27 18:02:01,227 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-27 18:02:01,227 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-27 18:02:01,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 18:02:01,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 18:02:01,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 18:02:01,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 18:02:01,227 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-06-27 18:02:01,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 18:02:01,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 18:02:01,228 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 18:02:01,228 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 18:02:01,229 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 18:02:01,301 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 18:02:01,303 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 18:02:01,523 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 18:02:01,523 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 18:02:01,707 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 18:02:01,708 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-06-27 18:02:01,708 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:02:01 BoogieIcfgContainer [2024-06-27 18:02:01,708 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 18:02:01,709 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 18:02:01,710 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 18:02:01,712 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 18:02:01,713 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:01:59" (1/4) ... [2024-06-27 18:02:01,714 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7345df8b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 06:02:01, skipping insertion in model container [2024-06-27 18:02:01,714 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 06:02:00" (2/4) ... [2024-06-27 18:02:01,715 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7345df8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 06:02:01, skipping insertion in model container [2024-06-27 18:02:01,716 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:02:00" (3/4) ... [2024-06-27 18:02:01,716 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7345df8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 06:02:01, skipping insertion in model container [2024-06-27 18:02:01,716 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:02:01" (4/4) ... [2024-06-27 18:02:01,717 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-opt-symm.wvr.c [2024-06-27 18:02:01,730 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 18:02:01,731 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 18:02:01,731 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 18:02:01,778 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-27 18:02:01,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 33 transitions, 80 flow [2024-06-27 18:02:01,839 INFO L124 PetriNetUnfolderBase]: 6/31 cut-off events. [2024-06-27 18:02:01,840 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 18:02:01,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 31 events. 6/31 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 32 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2024-06-27 18:02:01,843 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 33 transitions, 80 flow [2024-06-27 18:02:01,846 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 30 transitions, 72 flow [2024-06-27 18:02:01,859 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 18:02:01,869 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;@266bab9d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 18:02:01,870 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-06-27 18:02:01,884 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 18:02:01,884 INFO L124 PetriNetUnfolderBase]: 4/13 cut-off events. [2024-06-27 18:02:01,884 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 18:02:01,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:01,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:01,886 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:01,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:01,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1968923665, now seen corresponding path program 1 times [2024-06-27 18:02:01,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:01,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212658322] [2024-06-27 18:02:01,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:01,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:01,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:02,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:02:02,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:02,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212658322] [2024-06-27 18:02:02,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212658322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:02,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:02:02,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 18:02:02,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928757576] [2024-06-27 18:02:02,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:02,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 18:02:02,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:02,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 18:02:02,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 18:02:02,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-06-27 18:02:02,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 30 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:02,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:02,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-06-27 18:02:02,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:02,313 INFO L124 PetriNetUnfolderBase]: 206/350 cut-off events. [2024-06-27 18:02:02,313 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-06-27 18:02:02,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 725 conditions, 350 events. 206/350 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1175 event pairs, 81 based on Foata normal form. 26/297 useless extension candidates. Maximal degree in co-relation 643. Up to 172 conditions per place. [2024-06-27 18:02:02,317 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 41 selfloop transitions, 3 changer transitions 1/48 dead transitions. [2024-06-27 18:02:02,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 48 transitions, 207 flow [2024-06-27 18:02:02,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:02:02,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:02:02,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 63 transitions. [2024-06-27 18:02:02,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-06-27 18:02:02,330 INFO L175 Difference]: Start difference. First operand has 31 places, 30 transitions, 72 flow. Second operand 3 states and 63 transitions. [2024-06-27 18:02:02,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 48 transitions, 207 flow [2024-06-27 18:02:02,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 48 transitions, 193 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 18:02:02,336 INFO L231 Difference]: Finished difference. Result has 30 places, 32 transitions, 87 flow [2024-06-27 18:02:02,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=30, PETRI_TRANSITIONS=32} [2024-06-27 18:02:02,341 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -1 predicate places. [2024-06-27 18:02:02,341 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 32 transitions, 87 flow [2024-06-27 18:02:02,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:02,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:02,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:02,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 18:02:02,343 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:02,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:02,343 INFO L85 PathProgramCache]: Analyzing trace with hash 165957982, now seen corresponding path program 1 times [2024-06-27 18:02:02,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:02,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38530794] [2024-06-27 18:02:02,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:02,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:02,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:02,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:02:02,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:02,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38530794] [2024-06-27 18:02:02,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38530794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:02,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:02:02,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 18:02:02,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717714808] [2024-06-27 18:02:02,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:02,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 18:02:02,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:02,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 18:02:02,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 18:02:02,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:02,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 32 transitions, 87 flow. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:02,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:02,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:02,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:02,571 INFO L124 PetriNetUnfolderBase]: 178/318 cut-off events. [2024-06-27 18:02:02,571 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-06-27 18:02:02,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 702 conditions, 318 events. 178/318 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1078 event pairs, 122 based on Foata normal form. 0/278 useless extension candidates. Maximal degree in co-relation 358. Up to 300 conditions per place. [2024-06-27 18:02:02,579 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 25 selfloop transitions, 4 changer transitions 0/34 dead transitions. [2024-06-27 18:02:02,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 34 transitions, 149 flow [2024-06-27 18:02:02,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:02:02,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:02:02,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2024-06-27 18:02:02,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5050505050505051 [2024-06-27 18:02:02,582 INFO L175 Difference]: Start difference. First operand has 30 places, 32 transitions, 87 flow. Second operand 3 states and 50 transitions. [2024-06-27 18:02:02,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 34 transitions, 149 flow [2024-06-27 18:02:02,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 34 transitions, 146 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 18:02:02,586 INFO L231 Difference]: Finished difference. Result has 32 places, 34 transitions, 106 flow [2024-06-27 18:02:02,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=32, PETRI_TRANSITIONS=34} [2024-06-27 18:02:02,587 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 1 predicate places. [2024-06-27 18:02:02,587 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 34 transitions, 106 flow [2024-06-27 18:02:02,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:02,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:02,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:02,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 18:02:02,588 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:02,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:02,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1355476768, now seen corresponding path program 1 times [2024-06-27 18:02:02,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:02,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726629293] [2024-06-27 18:02:02,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:02,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:02,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:02,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 18:02:02,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:02,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726629293] [2024-06-27 18:02:02,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726629293] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:02:02,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215598163] [2024-06-27 18:02:02,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:02,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:02,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:02:02,693 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:02:02,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-06-27 18:02:02,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:02,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 5 conjunts are in the unsatisfiable core [2024-06-27 18:02:02,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:02:02,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 18:02:02,870 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:02:02,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 18:02:02,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215598163] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:02:02,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:02:02,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-06-27 18:02:02,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934012355] [2024-06-27 18:02:02,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:02:02,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:02:02,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:02,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:02:02,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:02:02,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:02,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 34 transitions, 106 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 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 18:02:02,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:02,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:02,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:02,974 INFO L124 PetriNetUnfolderBase]: 178/324 cut-off events. [2024-06-27 18:02:02,975 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-06-27 18:02:02,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 706 conditions, 324 events. 178/324 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1076 event pairs, 122 based on Foata normal form. 3/288 useless extension candidates. Maximal degree in co-relation 674. Up to 300 conditions per place. [2024-06-27 18:02:02,977 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 25 selfloop transitions, 10 changer transitions 0/40 dead transitions. [2024-06-27 18:02:02,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 40 transitions, 200 flow [2024-06-27 18:02:02,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:02:02,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:02:02,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 81 transitions. [2024-06-27 18:02:02,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-27 18:02:02,980 INFO L175 Difference]: Start difference. First operand has 32 places, 34 transitions, 106 flow. Second operand 6 states and 81 transitions. [2024-06-27 18:02:02,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 40 transitions, 200 flow [2024-06-27 18:02:02,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 40 transitions, 196 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 18:02:02,983 INFO L231 Difference]: Finished difference. Result has 39 places, 40 transitions, 168 flow [2024-06-27 18:02:02,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=168, PETRI_PLACES=39, PETRI_TRANSITIONS=40} [2024-06-27 18:02:02,984 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 8 predicate places. [2024-06-27 18:02:02,984 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 40 transitions, 168 flow [2024-06-27 18:02:02,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 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 18:02:02,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:02,985 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:03,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-06-27 18:02:03,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:03,193 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:03,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:03,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1316824994, now seen corresponding path program 2 times [2024-06-27 18:02:03,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:03,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818555079] [2024-06-27 18:02:03,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:03,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:03,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:03,321 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-06-27 18:02:03,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:03,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818555079] [2024-06-27 18:02:03,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818555079] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:02:03,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406795757] [2024-06-27 18:02:03,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 18:02:03,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:03,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:02:03,325 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:02:03,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-06-27 18:02:03,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-27 18:02:03,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:02:03,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2024-06-27 18:02:03,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:02:03,561 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 18:02:03,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 33 [2024-06-27 18:02:03,614 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-06-27 18:02:03,615 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 18:02:03,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406795757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:03,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-27 18:02:03,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2024-06-27 18:02:03,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440180286] [2024-06-27 18:02:03,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:03,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 18:02:03,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:03,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 18:02:03,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:02:03,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-06-27 18:02:03,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 40 transitions, 168 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:03,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:03,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-06-27 18:02:03,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:03,843 INFO L124 PetriNetUnfolderBase]: 263/464 cut-off events. [2024-06-27 18:02:03,844 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-06-27 18:02:03,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1029 conditions, 464 events. 263/464 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1788 event pairs, 61 based on Foata normal form. 12/419 useless extension candidates. Maximal degree in co-relation 966. Up to 148 conditions per place. [2024-06-27 18:02:03,846 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 65 selfloop transitions, 6 changer transitions 2/76 dead transitions. [2024-06-27 18:02:03,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 76 transitions, 396 flow [2024-06-27 18:02:03,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:02:03,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:02:03,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-27 18:02:03,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5575757575757576 [2024-06-27 18:02:03,850 INFO L175 Difference]: Start difference. First operand has 39 places, 40 transitions, 168 flow. Second operand 5 states and 92 transitions. [2024-06-27 18:02:03,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 76 transitions, 396 flow [2024-06-27 18:02:03,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 76 transitions, 380 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-27 18:02:03,855 INFO L231 Difference]: Finished difference. Result has 43 places, 41 transitions, 175 flow [2024-06-27 18:02:03,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=175, PETRI_PLACES=43, PETRI_TRANSITIONS=41} [2024-06-27 18:02:03,857 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 12 predicate places. [2024-06-27 18:02:03,857 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 41 transitions, 175 flow [2024-06-27 18:02:03,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:03,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:03,858 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:03,871 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-06-27 18:02:04,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-06-27 18:02:04,072 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:04,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:04,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1696489113, now seen corresponding path program 1 times [2024-06-27 18:02:04,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:04,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422475618] [2024-06-27 18:02:04,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:04,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:04,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:04,202 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-06-27 18:02:04,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:04,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422475618] [2024-06-27 18:02:04,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422475618] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:02:04,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356778814] [2024-06-27 18:02:04,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:04,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:04,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:02:04,205 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:02:04,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-06-27 18:02:04,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:04,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 18:02:04,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:02:04,366 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-06-27 18:02:04,366 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:02:04,405 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-06-27 18:02:04,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356778814] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:02:04,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:02:04,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-06-27 18:02:04,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499401056] [2024-06-27 18:02:04,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:02:04,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 18:02:04,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:04,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 18:02:04,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2024-06-27 18:02:04,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:04,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 41 transitions, 175 flow. Second operand has 12 states, 12 states have (on average 8.833333333333334) internal successors, (106), 12 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:04,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:04,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:04,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:04,509 INFO L124 PetriNetUnfolderBase]: 247/453 cut-off events. [2024-06-27 18:02:04,510 INFO L125 PetriNetUnfolderBase]: For 147/147 co-relation queries the response was YES. [2024-06-27 18:02:04,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1089 conditions, 453 events. 247/453 cut-off events. For 147/147 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1705 event pairs, 184 based on Foata normal form. 1/426 useless extension candidates. Maximal degree in co-relation 1022. Up to 426 conditions per place. [2024-06-27 18:02:04,512 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 27 selfloop transitions, 12 changer transitions 0/43 dead transitions. [2024-06-27 18:02:04,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 43 transitions, 265 flow [2024-06-27 18:02:04,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:02:04,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:02:04,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 86 transitions. [2024-06-27 18:02:04,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3722943722943723 [2024-06-27 18:02:04,513 INFO L175 Difference]: Start difference. First operand has 43 places, 41 transitions, 175 flow. Second operand 7 states and 86 transitions. [2024-06-27 18:02:04,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 43 transitions, 265 flow [2024-06-27 18:02:04,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 43 transitions, 257 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 18:02:04,517 INFO L231 Difference]: Finished difference. Result has 48 places, 43 transitions, 213 flow [2024-06-27 18:02:04,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=213, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2024-06-27 18:02:04,519 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 17 predicate places. [2024-06-27 18:02:04,519 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 213 flow [2024-06-27 18:02:04,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.833333333333334) internal successors, (106), 12 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:04,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:04,520 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:04,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-06-27 18:02:04,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:04,732 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:04,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:04,733 INFO L85 PathProgramCache]: Analyzing trace with hash 556217701, now seen corresponding path program 2 times [2024-06-27 18:02:04,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:04,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361577323] [2024-06-27 18:02:04,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:04,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:04,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:04,910 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:02:04,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:04,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361577323] [2024-06-27 18:02:04,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361577323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:04,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:02:04,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 18:02:04,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055332706] [2024-06-27 18:02:04,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:04,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 18:02:04,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:04,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 18:02:04,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-06-27 18:02:04,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-06-27 18:02:04,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 213 flow. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:04,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:04,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-06-27 18:02:04,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:05,034 INFO L124 PetriNetUnfolderBase]: 339/609 cut-off events. [2024-06-27 18:02:05,035 INFO L125 PetriNetUnfolderBase]: For 146/146 co-relation queries the response was YES. [2024-06-27 18:02:05,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1428 conditions, 609 events. 339/609 cut-off events. For 146/146 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2481 event pairs, 113 based on Foata normal form. 10/576 useless extension candidates. Maximal degree in co-relation 1350. Up to 224 conditions per place. [2024-06-27 18:02:05,038 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 66 selfloop transitions, 7 changer transitions 2/78 dead transitions. [2024-06-27 18:02:05,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 78 transitions, 453 flow [2024-06-27 18:02:05,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:02:05,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:02:05,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-27 18:02:05,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-27 18:02:05,040 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 213 flow. Second operand 5 states and 88 transitions. [2024-06-27 18:02:05,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 78 transitions, 453 flow [2024-06-27 18:02:05,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 78 transitions, 429 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 18:02:05,042 INFO L231 Difference]: Finished difference. Result has 50 places, 45 transitions, 221 flow [2024-06-27 18:02:05,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=221, PETRI_PLACES=50, PETRI_TRANSITIONS=45} [2024-06-27 18:02:05,043 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 19 predicate places. [2024-06-27 18:02:05,043 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 45 transitions, 221 flow [2024-06-27 18:02:05,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:05,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:05,044 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:05,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 18:02:05,044 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:05,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:05,045 INFO L85 PathProgramCache]: Analyzing trace with hash 2049356830, now seen corresponding path program 1 times [2024-06-27 18:02:05,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:05,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702946015] [2024-06-27 18:02:05,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:05,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:05,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:05,312 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:02:05,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:05,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702946015] [2024-06-27 18:02:05,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702946015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:05,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:02:05,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:02:05,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82209234] [2024-06-27 18:02:05,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:05,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:02:05,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:05,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:02:05,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:02:05,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-06-27 18:02:05,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 45 transitions, 221 flow. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:05,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:05,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-06-27 18:02:05,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:05,563 INFO L124 PetriNetUnfolderBase]: 363/660 cut-off events. [2024-06-27 18:02:05,563 INFO L125 PetriNetUnfolderBase]: For 171/171 co-relation queries the response was YES. [2024-06-27 18:02:05,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1642 conditions, 660 events. 363/660 cut-off events. For 171/171 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2846 event pairs, 45 based on Foata normal form. 4/663 useless extension candidates. Maximal degree in co-relation 1572. Up to 172 conditions per place. [2024-06-27 18:02:05,567 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 81 selfloop transitions, 10 changer transitions 2/96 dead transitions. [2024-06-27 18:02:05,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 96 transitions, 536 flow [2024-06-27 18:02:05,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:02:05,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:02:05,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-27 18:02:05,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-06-27 18:02:05,573 INFO L175 Difference]: Start difference. First operand has 50 places, 45 transitions, 221 flow. Second operand 8 states and 122 transitions. [2024-06-27 18:02:05,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 96 transitions, 536 flow [2024-06-27 18:02:05,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 96 transitions, 526 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 18:02:05,576 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 250 flow [2024-06-27 18:02:05,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=250, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2024-06-27 18:02:05,577 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 24 predicate places. [2024-06-27 18:02:05,577 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 250 flow [2024-06-27 18:02:05,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:05,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:05,577 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:05,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 18:02:05,578 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:05,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:05,578 INFO L85 PathProgramCache]: Analyzing trace with hash 385130435, now seen corresponding path program 1 times [2024-06-27 18:02:05,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:05,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034822726] [2024-06-27 18:02:05,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:05,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:05,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:05,651 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:02:05,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:05,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034822726] [2024-06-27 18:02:05,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034822726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:05,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:02:05,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:02:05,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518235071] [2024-06-27 18:02:05,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:05,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 18:02:05,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:05,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 18:02:05,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 18:02:05,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:05,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 250 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:05,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:05,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:05,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:05,788 INFO L124 PetriNetUnfolderBase]: 467/852 cut-off events. [2024-06-27 18:02:05,788 INFO L125 PetriNetUnfolderBase]: For 464/466 co-relation queries the response was YES. [2024-06-27 18:02:05,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2237 conditions, 852 events. 467/852 cut-off events. For 464/466 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4039 event pairs, 193 based on Foata normal form. 5/857 useless extension candidates. Maximal degree in co-relation 2166. Up to 445 conditions per place. [2024-06-27 18:02:05,791 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 74 selfloop transitions, 5 changer transitions 4/86 dead transitions. [2024-06-27 18:02:05,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 86 transitions, 570 flow [2024-06-27 18:02:05,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:02:05,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:02:05,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-27 18:02:05,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5575757575757576 [2024-06-27 18:02:05,793 INFO L175 Difference]: Start difference. First operand has 55 places, 48 transitions, 250 flow. Second operand 5 states and 92 transitions. [2024-06-27 18:02:05,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 86 transitions, 570 flow [2024-06-27 18:02:05,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 86 transitions, 561 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-27 18:02:05,795 INFO L231 Difference]: Finished difference. Result has 59 places, 50 transitions, 267 flow [2024-06-27 18:02:05,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=267, PETRI_PLACES=59, PETRI_TRANSITIONS=50} [2024-06-27 18:02:05,797 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 28 predicate places. [2024-06-27 18:02:05,797 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 50 transitions, 267 flow [2024-06-27 18:02:05,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:05,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:05,798 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:05,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 18:02:05,798 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:05,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:05,799 INFO L85 PathProgramCache]: Analyzing trace with hash 2067495451, now seen corresponding path program 1 times [2024-06-27 18:02:05,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:05,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966593183] [2024-06-27 18:02:05,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:05,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:05,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:05,854 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:02:05,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:05,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966593183] [2024-06-27 18:02:05,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966593183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:05,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:02:05,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:02:05,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315623958] [2024-06-27 18:02:05,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:05,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 18:02:05,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:05,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 18:02:05,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 18:02:05,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:05,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 50 transitions, 267 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:05,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:05,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:05,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:05,989 INFO L124 PetriNetUnfolderBase]: 592/1101 cut-off events. [2024-06-27 18:02:05,990 INFO L125 PetriNetUnfolderBase]: For 814/814 co-relation queries the response was YES. [2024-06-27 18:02:05,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3067 conditions, 1101 events. 592/1101 cut-off events. For 814/814 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5484 event pairs, 268 based on Foata normal form. 4/1105 useless extension candidates. Maximal degree in co-relation 2994. Up to 606 conditions per place. [2024-06-27 18:02:05,996 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 76 selfloop transitions, 5 changer transitions 2/86 dead transitions. [2024-06-27 18:02:05,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 86 transitions, 598 flow [2024-06-27 18:02:05,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:02:05,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:02:05,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 86 transitions. [2024-06-27 18:02:05,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5212121212121212 [2024-06-27 18:02:05,997 INFO L175 Difference]: Start difference. First operand has 59 places, 50 transitions, 267 flow. Second operand 5 states and 86 transitions. [2024-06-27 18:02:05,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 86 transitions, 598 flow [2024-06-27 18:02:05,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 86 transitions, 589 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 18:02:05,999 INFO L231 Difference]: Finished difference. Result has 63 places, 52 transitions, 285 flow [2024-06-27 18:02:06,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=285, PETRI_PLACES=63, PETRI_TRANSITIONS=52} [2024-06-27 18:02:06,001 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 32 predicate places. [2024-06-27 18:02:06,001 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 52 transitions, 285 flow [2024-06-27 18:02:06,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:06,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:06,001 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:06,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 18:02:06,002 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:06,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:06,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1159540353, now seen corresponding path program 2 times [2024-06-27 18:02:06,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:06,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071667296] [2024-06-27 18:02:06,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:06,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:06,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:06,098 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:02:06,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:06,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071667296] [2024-06-27 18:02:06,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071667296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:06,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:02:06,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:02:06,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833566363] [2024-06-27 18:02:06,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:06,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 18:02:06,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:06,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 18:02:06,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 18:02:06,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:06,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 52 transitions, 285 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:06,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:06,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:06,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:06,287 INFO L124 PetriNetUnfolderBase]: 752/1361 cut-off events. [2024-06-27 18:02:06,287 INFO L125 PetriNetUnfolderBase]: For 1152/1152 co-relation queries the response was YES. [2024-06-27 18:02:06,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4150 conditions, 1361 events. 752/1361 cut-off events. For 1152/1152 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 7011 event pairs, 250 based on Foata normal form. 28/1389 useless extension candidates. Maximal degree in co-relation 4075. Up to 1038 conditions per place. [2024-06-27 18:02:06,295 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 76 selfloop transitions, 4 changer transitions 2/85 dead transitions. [2024-06-27 18:02:06,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 85 transitions, 613 flow [2024-06-27 18:02:06,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 18:02:06,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 18:02:06,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 76 transitions. [2024-06-27 18:02:06,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5757575757575758 [2024-06-27 18:02:06,296 INFO L175 Difference]: Start difference. First operand has 63 places, 52 transitions, 285 flow. Second operand 4 states and 76 transitions. [2024-06-27 18:02:06,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 85 transitions, 613 flow [2024-06-27 18:02:06,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 85 transitions, 605 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 18:02:06,302 INFO L231 Difference]: Finished difference. Result has 67 places, 56 transitions, 328 flow [2024-06-27 18:02:06,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=328, PETRI_PLACES=67, PETRI_TRANSITIONS=56} [2024-06-27 18:02:06,303 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 36 predicate places. [2024-06-27 18:02:06,303 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 56 transitions, 328 flow [2024-06-27 18:02:06,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:06,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:06,304 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:06,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 18:02:06,304 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:06,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:06,305 INFO L85 PathProgramCache]: Analyzing trace with hash -85164881, now seen corresponding path program 2 times [2024-06-27 18:02:06,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:06,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156986686] [2024-06-27 18:02:06,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:06,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:06,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:06,383 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:02:06,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:06,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156986686] [2024-06-27 18:02:06,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156986686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:06,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:02:06,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:02:06,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854958202] [2024-06-27 18:02:06,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:06,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 18:02:06,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:06,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 18:02:06,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 18:02:06,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:06,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 56 transitions, 328 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:06,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:06,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:06,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:06,539 INFO L124 PetriNetUnfolderBase]: 788/1425 cut-off events. [2024-06-27 18:02:06,540 INFO L125 PetriNetUnfolderBase]: For 1732/1732 co-relation queries the response was YES. [2024-06-27 18:02:06,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4467 conditions, 1425 events. 788/1425 cut-off events. For 1732/1732 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7334 event pairs, 310 based on Foata normal form. 24/1449 useless extension candidates. Maximal degree in co-relation 4391. Up to 1087 conditions per place. [2024-06-27 18:02:06,548 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 78 selfloop transitions, 6 changer transitions 3/90 dead transitions. [2024-06-27 18:02:06,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 90 transitions, 681 flow [2024-06-27 18:02:06,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 18:02:06,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 18:02:06,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 77 transitions. [2024-06-27 18:02:06,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-27 18:02:06,549 INFO L175 Difference]: Start difference. First operand has 67 places, 56 transitions, 328 flow. Second operand 4 states and 77 transitions. [2024-06-27 18:02:06,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 90 transitions, 681 flow [2024-06-27 18:02:06,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 90 transitions, 681 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-27 18:02:06,553 INFO L231 Difference]: Finished difference. Result has 73 places, 60 transitions, 393 flow [2024-06-27 18:02:06,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=393, PETRI_PLACES=73, PETRI_TRANSITIONS=60} [2024-06-27 18:02:06,553 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 42 predicate places. [2024-06-27 18:02:06,553 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 60 transitions, 393 flow [2024-06-27 18:02:06,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:06,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:06,554 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:06,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 18:02:06,554 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:06,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:06,555 INFO L85 PathProgramCache]: Analyzing trace with hash 2118369909, now seen corresponding path program 3 times [2024-06-27 18:02:06,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:06,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202204508] [2024-06-27 18:02:06,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:06,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:06,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:06,608 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:02:06,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:06,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202204508] [2024-06-27 18:02:06,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202204508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:06,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:02:06,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:02:06,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869706769] [2024-06-27 18:02:06,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:06,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 18:02:06,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:06,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 18:02:06,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 18:02:06,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:06,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 60 transitions, 393 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:06,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:06,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:06,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:06,789 INFO L124 PetriNetUnfolderBase]: 718/1300 cut-off events. [2024-06-27 18:02:06,790 INFO L125 PetriNetUnfolderBase]: For 2101/2101 co-relation queries the response was YES. [2024-06-27 18:02:06,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4253 conditions, 1300 events. 718/1300 cut-off events. For 2101/2101 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 6630 event pairs, 300 based on Foata normal form. 20/1320 useless extension candidates. Maximal degree in co-relation 4174. Up to 740 conditions per place. [2024-06-27 18:02:06,797 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 85 selfloop transitions, 10 changer transitions 3/101 dead transitions. [2024-06-27 18:02:06,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 101 transitions, 799 flow [2024-06-27 18:02:06,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 18:02:06,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 18:02:06,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 85 transitions. [2024-06-27 18:02:06,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6439393939393939 [2024-06-27 18:02:06,798 INFO L175 Difference]: Start difference. First operand has 73 places, 60 transitions, 393 flow. Second operand 4 states and 85 transitions. [2024-06-27 18:02:06,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 101 transitions, 799 flow [2024-06-27 18:02:06,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 101 transitions, 793 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-27 18:02:06,802 INFO L231 Difference]: Finished difference. Result has 77 places, 62 transitions, 435 flow [2024-06-27 18:02:06,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=435, PETRI_PLACES=77, PETRI_TRANSITIONS=62} [2024-06-27 18:02:06,803 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 46 predicate places. [2024-06-27 18:02:06,803 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 62 transitions, 435 flow [2024-06-27 18:02:06,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:06,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:06,803 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:06,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 18:02:06,804 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:06,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:06,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1440946237, now seen corresponding path program 3 times [2024-06-27 18:02:06,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:06,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052861937] [2024-06-27 18:02:06,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:06,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:06,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:06,852 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:02:06,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:06,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052861937] [2024-06-27 18:02:06,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052861937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:06,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:02:06,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:02:06,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250176859] [2024-06-27 18:02:06,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:06,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 18:02:06,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:06,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 18:02:06,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 18:02:06,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:06,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 62 transitions, 435 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:06,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:06,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:06,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:06,981 INFO L124 PetriNetUnfolderBase]: 644/1161 cut-off events. [2024-06-27 18:02:06,982 INFO L125 PetriNetUnfolderBase]: For 2300/2301 co-relation queries the response was YES. [2024-06-27 18:02:06,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3945 conditions, 1161 events. 644/1161 cut-off events. For 2300/2301 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5580 event pairs, 256 based on Foata normal form. 23/1184 useless extension candidates. Maximal degree in co-relation 3864. Up to 680 conditions per place. [2024-06-27 18:02:06,989 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 81 selfloop transitions, 10 changer transitions 2/96 dead transitions. [2024-06-27 18:02:06,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 96 transitions, 820 flow [2024-06-27 18:02:06,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 18:02:06,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 18:02:06,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 79 transitions. [2024-06-27 18:02:06,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5984848484848485 [2024-06-27 18:02:06,990 INFO L175 Difference]: Start difference. First operand has 77 places, 62 transitions, 435 flow. Second operand 4 states and 79 transitions. [2024-06-27 18:02:06,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 96 transitions, 820 flow [2024-06-27 18:02:06,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 96 transitions, 794 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 18:02:06,994 INFO L231 Difference]: Finished difference. Result has 77 places, 64 transitions, 469 flow [2024-06-27 18:02:06,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=469, PETRI_PLACES=77, PETRI_TRANSITIONS=64} [2024-06-27 18:02:06,995 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 46 predicate places. [2024-06-27 18:02:06,995 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 64 transitions, 469 flow [2024-06-27 18:02:06,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:06,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:06,996 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:06,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 18:02:06,996 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:06,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:06,996 INFO L85 PathProgramCache]: Analyzing trace with hash 872518883, now seen corresponding path program 1 times [2024-06-27 18:02:06,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:06,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051312735] [2024-06-27 18:02:06,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:06,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:07,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:07,665 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:02:07,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:07,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051312735] [2024-06-27 18:02:07,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051312735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:07,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:02:07,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 18:02:07,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539401004] [2024-06-27 18:02:07,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:07,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:02:07,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:07,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:02:07,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:02:07,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:07,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 64 transitions, 469 flow. Second operand has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:07,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:07,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:07,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:08,191 INFO L124 PetriNetUnfolderBase]: 657/1191 cut-off events. [2024-06-27 18:02:08,191 INFO L125 PetriNetUnfolderBase]: For 2150/2150 co-relation queries the response was YES. [2024-06-27 18:02:08,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4089 conditions, 1191 events. 657/1191 cut-off events. For 2150/2150 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 6026 event pairs, 108 based on Foata normal form. 6/1197 useless extension candidates. Maximal degree in co-relation 4008. Up to 271 conditions per place. [2024-06-27 18:02:08,199 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 115 selfloop transitions, 31 changer transitions 18/167 dead transitions. [2024-06-27 18:02:08,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 167 transitions, 1301 flow [2024-06-27 18:02:08,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-27 18:02:08,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-27 18:02:08,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 223 transitions. [2024-06-27 18:02:08,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4505050505050505 [2024-06-27 18:02:08,201 INFO L175 Difference]: Start difference. First operand has 77 places, 64 transitions, 469 flow. Second operand 15 states and 223 transitions. [2024-06-27 18:02:08,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 167 transitions, 1301 flow [2024-06-27 18:02:08,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 167 transitions, 1261 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-27 18:02:08,207 INFO L231 Difference]: Finished difference. Result has 92 places, 75 transitions, 618 flow [2024-06-27 18:02:08,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=618, PETRI_PLACES=92, PETRI_TRANSITIONS=75} [2024-06-27 18:02:08,208 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 61 predicate places. [2024-06-27 18:02:08,208 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 75 transitions, 618 flow [2024-06-27 18:02:08,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:08,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:08,209 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:08,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 18:02:08,210 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:08,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:08,210 INFO L85 PathProgramCache]: Analyzing trace with hash -608623867, now seen corresponding path program 2 times [2024-06-27 18:02:08,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:08,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736953447] [2024-06-27 18:02:08,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:08,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:08,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:08,927 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:02:08,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:08,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736953447] [2024-06-27 18:02:08,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736953447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:08,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:02:08,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 18:02:08,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382454397] [2024-06-27 18:02:08,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:08,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:02:08,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:08,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:02:08,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:02:08,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:08,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 75 transitions, 618 flow. Second operand has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:08,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:08,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:08,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:09,989 INFO L124 PetriNetUnfolderBase]: 1111/1998 cut-off events. [2024-06-27 18:02:09,989 INFO L125 PetriNetUnfolderBase]: For 4626/4626 co-relation queries the response was YES. [2024-06-27 18:02:09,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7312 conditions, 1998 events. 1111/1998 cut-off events. For 4626/4626 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 11380 event pairs, 131 based on Foata normal form. 3/2001 useless extension candidates. Maximal degree in co-relation 7226. Up to 370 conditions per place. [2024-06-27 18:02:10,003 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 192 selfloop transitions, 96 changer transitions 13/304 dead transitions. [2024-06-27 18:02:10,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 304 transitions, 2396 flow [2024-06-27 18:02:10,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-06-27 18:02:10,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-06-27 18:02:10,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 467 transitions. [2024-06-27 18:02:10,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45650048875855326 [2024-06-27 18:02:10,005 INFO L175 Difference]: Start difference. First operand has 92 places, 75 transitions, 618 flow. Second operand 31 states and 467 transitions. [2024-06-27 18:02:10,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 304 transitions, 2396 flow [2024-06-27 18:02:10,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 304 transitions, 2217 flow, removed 72 selfloop flow, removed 9 redundant places. [2024-06-27 18:02:10,021 INFO L231 Difference]: Finished difference. Result has 120 places, 150 transitions, 1405 flow [2024-06-27 18:02:10,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=566, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1405, PETRI_PLACES=120, PETRI_TRANSITIONS=150} [2024-06-27 18:02:10,022 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 89 predicate places. [2024-06-27 18:02:10,022 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 150 transitions, 1405 flow [2024-06-27 18:02:10,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:10,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:10,022 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:10,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 18:02:10,022 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:10,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:10,023 INFO L85 PathProgramCache]: Analyzing trace with hash -904049727, now seen corresponding path program 3 times [2024-06-27 18:02:10,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:10,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644023769] [2024-06-27 18:02:10,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:10,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:10,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:10,675 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:02:10,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:10,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644023769] [2024-06-27 18:02:10,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644023769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:10,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:02:10,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 18:02:10,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100426979] [2024-06-27 18:02:10,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:10,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:02:10,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:10,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:02:10,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:02:10,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:10,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 150 transitions, 1405 flow. Second operand has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:10,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:10,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:10,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:11,673 INFO L124 PetriNetUnfolderBase]: 1475/2662 cut-off events. [2024-06-27 18:02:11,673 INFO L125 PetriNetUnfolderBase]: For 6979/6979 co-relation queries the response was YES. [2024-06-27 18:02:11,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10304 conditions, 2662 events. 1475/2662 cut-off events. For 6979/6979 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 16320 event pairs, 116 based on Foata normal form. 1/2663 useless extension candidates. Maximal degree in co-relation 10212. Up to 438 conditions per place. [2024-06-27 18:02:11,690 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 165 selfloop transitions, 141 changer transitions 10/319 dead transitions. [2024-06-27 18:02:11,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 319 transitions, 2925 flow [2024-06-27 18:02:11,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-06-27 18:02:11,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-06-27 18:02:11,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 393 transitions. [2024-06-27 18:02:11,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44107744107744107 [2024-06-27 18:02:11,693 INFO L175 Difference]: Start difference. First operand has 120 places, 150 transitions, 1405 flow. Second operand 27 states and 393 transitions. [2024-06-27 18:02:11,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 319 transitions, 2925 flow [2024-06-27 18:02:11,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 319 transitions, 2786 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-27 18:02:11,715 INFO L231 Difference]: Finished difference. Result has 147 places, 200 transitions, 2213 flow [2024-06-27 18:02:11,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1308, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2213, PETRI_PLACES=147, PETRI_TRANSITIONS=200} [2024-06-27 18:02:11,716 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 116 predicate places. [2024-06-27 18:02:11,716 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 200 transitions, 2213 flow [2024-06-27 18:02:11,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:11,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:11,717 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:11,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 18:02:11,717 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:11,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:11,717 INFO L85 PathProgramCache]: Analyzing trace with hash -2042887547, now seen corresponding path program 4 times [2024-06-27 18:02:11,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:11,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354937518] [2024-06-27 18:02:11,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:11,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:11,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:12,286 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:02:12,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:12,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354937518] [2024-06-27 18:02:12,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354937518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:12,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:02:12,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 18:02:12,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433321344] [2024-06-27 18:02:12,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:12,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:02:12,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:12,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:02:12,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:02:12,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:12,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 200 transitions, 2213 flow. Second operand has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:12,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:12,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:12,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:13,452 INFO L124 PetriNetUnfolderBase]: 1466/2637 cut-off events. [2024-06-27 18:02:13,452 INFO L125 PetriNetUnfolderBase]: For 9007/9007 co-relation queries the response was YES. [2024-06-27 18:02:13,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11503 conditions, 2637 events. 1466/2637 cut-off events. For 9007/9007 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 16008 event pairs, 83 based on Foata normal form. 1/2638 useless extension candidates. Maximal degree in co-relation 11405. Up to 434 conditions per place. [2024-06-27 18:02:13,477 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 159 selfloop transitions, 152 changer transitions 10/324 dead transitions. [2024-06-27 18:02:13,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 324 transitions, 3281 flow [2024-06-27 18:02:13,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-06-27 18:02:13,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-06-27 18:02:13,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 436 transitions. [2024-06-27 18:02:13,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.426197458455523 [2024-06-27 18:02:13,479 INFO L175 Difference]: Start difference. First operand has 147 places, 200 transitions, 2213 flow. Second operand 31 states and 436 transitions. [2024-06-27 18:02:13,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 324 transitions, 3281 flow [2024-06-27 18:02:13,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 324 transitions, 3081 flow, removed 28 selfloop flow, removed 11 redundant places. [2024-06-27 18:02:13,521 INFO L231 Difference]: Finished difference. Result has 166 places, 200 transitions, 2332 flow [2024-06-27 18:02:13,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=2029, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2332, PETRI_PLACES=166, PETRI_TRANSITIONS=200} [2024-06-27 18:02:13,522 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 135 predicate places. [2024-06-27 18:02:13,522 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 200 transitions, 2332 flow [2024-06-27 18:02:13,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:13,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:13,523 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:13,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 18:02:13,523 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:13,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:13,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1494422147, now seen corresponding path program 5 times [2024-06-27 18:02:13,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:13,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659949291] [2024-06-27 18:02:13,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:13,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:13,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:14,073 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:02:14,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:14,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659949291] [2024-06-27 18:02:14,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659949291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:14,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:02:14,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 18:02:14,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322554978] [2024-06-27 18:02:14,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:14,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:02:14,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:14,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:02:14,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:02:14,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:14,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 200 transitions, 2332 flow. Second operand has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:14,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:14,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:14,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:14,836 INFO L124 PetriNetUnfolderBase]: 1486/2684 cut-off events. [2024-06-27 18:02:14,836 INFO L125 PetriNetUnfolderBase]: For 9642/9644 co-relation queries the response was YES. [2024-06-27 18:02:14,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11941 conditions, 2684 events. 1486/2684 cut-off events. For 9642/9644 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 16460 event pairs, 336 based on Foata normal form. 1/2685 useless extension candidates. Maximal degree in co-relation 11844. Up to 912 conditions per place. [2024-06-27 18:02:14,854 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 194 selfloop transitions, 84 changer transitions 10/291 dead transitions. [2024-06-27 18:02:14,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 291 transitions, 3421 flow [2024-06-27 18:02:14,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-27 18:02:14,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-27 18:02:14,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 260 transitions. [2024-06-27 18:02:14,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46345811051693403 [2024-06-27 18:02:14,855 INFO L175 Difference]: Start difference. First operand has 166 places, 200 transitions, 2332 flow. Second operand 17 states and 260 transitions. [2024-06-27 18:02:14,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 291 transitions, 3421 flow [2024-06-27 18:02:14,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 291 transitions, 3016 flow, removed 16 selfloop flow, removed 33 redundant places. [2024-06-27 18:02:14,883 INFO L231 Difference]: Finished difference. Result has 157 places, 218 transitions, 2408 flow [2024-06-27 18:02:14,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1971, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2408, PETRI_PLACES=157, PETRI_TRANSITIONS=218} [2024-06-27 18:02:14,883 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 126 predicate places. [2024-06-27 18:02:14,884 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 218 transitions, 2408 flow [2024-06-27 18:02:14,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:14,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:14,884 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:14,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 18:02:14,884 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:14,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:14,885 INFO L85 PathProgramCache]: Analyzing trace with hash -645673997, now seen corresponding path program 6 times [2024-06-27 18:02:14,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:14,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385996471] [2024-06-27 18:02:14,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:14,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:14,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:15,303 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:02:15,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:15,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385996471] [2024-06-27 18:02:15,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385996471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:15,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:02:15,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 18:02:15,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91570634] [2024-06-27 18:02:15,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:15,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:02:15,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:15,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:02:15,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:02:15,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:15,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 218 transitions, 2408 flow. Second operand has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:15,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:15,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:15,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:16,349 INFO L124 PetriNetUnfolderBase]: 1601/2893 cut-off events. [2024-06-27 18:02:16,350 INFO L125 PetriNetUnfolderBase]: For 9904/9908 co-relation queries the response was YES. [2024-06-27 18:02:16,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12384 conditions, 2893 events. 1601/2893 cut-off events. For 9904/9908 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 18098 event pairs, 233 based on Foata normal form. 1/2894 useless extension candidates. Maximal degree in co-relation 12283. Up to 908 conditions per place. [2024-06-27 18:02:16,369 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 192 selfloop transitions, 139 changer transitions 11/345 dead transitions. [2024-06-27 18:02:16,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 345 transitions, 3704 flow [2024-06-27 18:02:16,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-06-27 18:02:16,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-06-27 18:02:16,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 384 transitions. [2024-06-27 18:02:16,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46545454545454545 [2024-06-27 18:02:16,372 INFO L175 Difference]: Start difference. First operand has 157 places, 218 transitions, 2408 flow. Second operand 25 states and 384 transitions. [2024-06-27 18:02:16,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 345 transitions, 3704 flow [2024-06-27 18:02:16,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 345 transitions, 3633 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-27 18:02:16,406 INFO L231 Difference]: Finished difference. Result has 181 places, 234 transitions, 2897 flow [2024-06-27 18:02:16,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=2358, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2897, PETRI_PLACES=181, PETRI_TRANSITIONS=234} [2024-06-27 18:02:16,407 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 150 predicate places. [2024-06-27 18:02:16,407 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 234 transitions, 2897 flow [2024-06-27 18:02:16,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:16,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:16,407 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:16,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 18:02:16,408 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:16,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:16,408 INFO L85 PathProgramCache]: Analyzing trace with hash -2017937983, now seen corresponding path program 7 times [2024-06-27 18:02:16,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:16,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477083978] [2024-06-27 18:02:16,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:16,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:16,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:16,902 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:02:16,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:16,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477083978] [2024-06-27 18:02:16,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477083978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:16,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:02:16,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 18:02:16,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512348126] [2024-06-27 18:02:16,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:16,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:02:16,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:16,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:02:16,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:02:16,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:16,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 234 transitions, 2897 flow. Second operand has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:16,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:16,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:16,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:17,802 INFO L124 PetriNetUnfolderBase]: 1880/3451 cut-off events. [2024-06-27 18:02:17,803 INFO L125 PetriNetUnfolderBase]: For 14295/14295 co-relation queries the response was YES. [2024-06-27 18:02:17,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14896 conditions, 3451 events. 1880/3451 cut-off events. For 14295/14295 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 22743 event pairs, 230 based on Foata normal form. 5/3456 useless extension candidates. Maximal degree in co-relation 14791. Up to 1083 conditions per place. [2024-06-27 18:02:17,834 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 227 selfloop transitions, 136 changer transitions 12/378 dead transitions. [2024-06-27 18:02:17,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 378 transitions, 4540 flow [2024-06-27 18:02:17,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-06-27 18:02:17,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-06-27 18:02:17,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 339 transitions. [2024-06-27 18:02:17,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4669421487603306 [2024-06-27 18:02:17,836 INFO L175 Difference]: Start difference. First operand has 181 places, 234 transitions, 2897 flow. Second operand 22 states and 339 transitions. [2024-06-27 18:02:17,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 378 transitions, 4540 flow [2024-06-27 18:02:17,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 378 transitions, 4316 flow, removed 11 selfloop flow, removed 13 redundant places. [2024-06-27 18:02:17,886 INFO L231 Difference]: Finished difference. Result has 196 places, 268 transitions, 3497 flow [2024-06-27 18:02:17,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=2742, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3497, PETRI_PLACES=196, PETRI_TRANSITIONS=268} [2024-06-27 18:02:17,886 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 165 predicate places. [2024-06-27 18:02:17,886 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 268 transitions, 3497 flow [2024-06-27 18:02:17,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:17,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:17,887 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:17,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 18:02:17,887 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:17,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:17,888 INFO L85 PathProgramCache]: Analyzing trace with hash 48480717, now seen corresponding path program 8 times [2024-06-27 18:02:17,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:17,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667932066] [2024-06-27 18:02:17,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:17,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:17,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:18,360 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:02:18,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:18,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667932066] [2024-06-27 18:02:18,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667932066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:18,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:02:18,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 18:02:18,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686942584] [2024-06-27 18:02:18,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:18,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:02:18,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:18,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:02:18,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:02:18,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:18,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 268 transitions, 3497 flow. Second operand has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:18,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:18,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:18,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:19,453 INFO L124 PetriNetUnfolderBase]: 2068/3791 cut-off events. [2024-06-27 18:02:19,453 INFO L125 PetriNetUnfolderBase]: For 17286/17286 co-relation queries the response was YES. [2024-06-27 18:02:19,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16845 conditions, 3791 events. 2068/3791 cut-off events. For 17286/17286 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 25617 event pairs, 195 based on Foata normal form. 4/3795 useless extension candidates. Maximal degree in co-relation 16733. Up to 764 conditions per place. [2024-06-27 18:02:19,478 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 226 selfloop transitions, 167 changer transitions 16/412 dead transitions. [2024-06-27 18:02:19,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 412 transitions, 5055 flow [2024-06-27 18:02:19,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-06-27 18:02:19,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-06-27 18:02:19,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 403 transitions. [2024-06-27 18:02:19,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-06-27 18:02:19,480 INFO L175 Difference]: Start difference. First operand has 196 places, 268 transitions, 3497 flow. Second operand 26 states and 403 transitions. [2024-06-27 18:02:19,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 412 transitions, 5055 flow [2024-06-27 18:02:19,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 412 transitions, 4797 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-27 18:02:19,555 INFO L231 Difference]: Finished difference. Result has 219 places, 284 transitions, 3938 flow [2024-06-27 18:02:19,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=3289, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3938, PETRI_PLACES=219, PETRI_TRANSITIONS=284} [2024-06-27 18:02:19,555 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 188 predicate places. [2024-06-27 18:02:19,556 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 284 transitions, 3938 flow [2024-06-27 18:02:19,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:19,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:19,556 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:19,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 18:02:19,556 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:19,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:19,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1786280131, now seen corresponding path program 9 times [2024-06-27 18:02:19,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:19,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710478158] [2024-06-27 18:02:19,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:19,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:19,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:19,967 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:02:19,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:19,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710478158] [2024-06-27 18:02:19,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710478158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:19,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:02:19,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 18:02:19,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878914605] [2024-06-27 18:02:19,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:19,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:02:19,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:19,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:02:19,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:02:20,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:20,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 284 transitions, 3938 flow. Second operand has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:20,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:20,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:20,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:21,010 INFO L124 PetriNetUnfolderBase]: 2059/3780 cut-off events. [2024-06-27 18:02:21,011 INFO L125 PetriNetUnfolderBase]: For 19078/19085 co-relation queries the response was YES. [2024-06-27 18:02:21,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17620 conditions, 3780 events. 2059/3780 cut-off events. For 19078/19085 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 25589 event pairs, 313 based on Foata normal form. 1/3781 useless extension candidates. Maximal degree in co-relation 17504. Up to 1147 conditions per place. [2024-06-27 18:02:21,043 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 197 selfloop transitions, 171 changer transitions 11/382 dead transitions. [2024-06-27 18:02:21,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 382 transitions, 5081 flow [2024-06-27 18:02:21,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-06-27 18:02:21,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-06-27 18:02:21,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 349 transitions. [2024-06-27 18:02:21,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4598155467720685 [2024-06-27 18:02:21,045 INFO L175 Difference]: Start difference. First operand has 219 places, 284 transitions, 3938 flow. Second operand 23 states and 349 transitions. [2024-06-27 18:02:21,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 382 transitions, 5081 flow [2024-06-27 18:02:21,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 382 transitions, 4899 flow, removed 13 selfloop flow, removed 15 redundant places. [2024-06-27 18:02:21,111 INFO L231 Difference]: Finished difference. Result has 226 places, 283 transitions, 4100 flow [2024-06-27 18:02:21,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=3768, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4100, PETRI_PLACES=226, PETRI_TRANSITIONS=283} [2024-06-27 18:02:21,112 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 195 predicate places. [2024-06-27 18:02:21,112 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 283 transitions, 4100 flow [2024-06-27 18:02:21,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:21,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:21,112 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:21,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 18:02:21,113 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:21,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:21,113 INFO L85 PathProgramCache]: Analyzing trace with hash 935005355, now seen corresponding path program 10 times [2024-06-27 18:02:21,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:21,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741436170] [2024-06-27 18:02:21,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:21,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:21,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:21,584 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:02:21,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:21,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741436170] [2024-06-27 18:02:21,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741436170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:21,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:02:21,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 18:02:21,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294945965] [2024-06-27 18:02:21,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:21,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:02:21,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:21,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:02:21,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:02:21,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:21,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 283 transitions, 4100 flow. Second operand has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:21,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:21,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:21,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:22,549 INFO L124 PetriNetUnfolderBase]: 2050/3755 cut-off events. [2024-06-27 18:02:22,549 INFO L125 PetriNetUnfolderBase]: For 21499/21499 co-relation queries the response was YES. [2024-06-27 18:02:22,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17936 conditions, 3755 events. 2050/3755 cut-off events. For 21499/21499 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 25356 event pairs, 230 based on Foata normal form. 1/3756 useless extension candidates. Maximal degree in co-relation 17825. Up to 764 conditions per place. [2024-06-27 18:02:22,579 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 198 selfloop transitions, 156 changer transitions 11/368 dead transitions. [2024-06-27 18:02:22,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 368 transitions, 5148 flow [2024-06-27 18:02:22,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-06-27 18:02:22,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-06-27 18:02:22,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 312 transitions. [2024-06-27 18:02:22,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45021645021645024 [2024-06-27 18:02:22,581 INFO L175 Difference]: Start difference. First operand has 226 places, 283 transitions, 4100 flow. Second operand 21 states and 312 transitions. [2024-06-27 18:02:22,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 368 transitions, 5148 flow [2024-06-27 18:02:22,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 368 transitions, 4794 flow, removed 5 selfloop flow, removed 22 redundant places. [2024-06-27 18:02:22,651 INFO L231 Difference]: Finished difference. Result has 224 places, 282 transitions, 4059 flow [2024-06-27 18:02:22,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=3754, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4059, PETRI_PLACES=224, PETRI_TRANSITIONS=282} [2024-06-27 18:02:22,652 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 193 predicate places. [2024-06-27 18:02:22,652 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 282 transitions, 4059 flow [2024-06-27 18:02:22,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:22,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:22,653 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:22,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 18:02:22,653 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:22,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:22,653 INFO L85 PathProgramCache]: Analyzing trace with hash 265630793, now seen corresponding path program 11 times [2024-06-27 18:02:22,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:22,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254554076] [2024-06-27 18:02:22,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:22,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:22,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:23,022 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:02:23,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:23,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254554076] [2024-06-27 18:02:23,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254554076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:23,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:02:23,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 18:02:23,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866682103] [2024-06-27 18:02:23,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:23,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:02:23,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:23,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:02:23,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:02:23,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:23,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 282 transitions, 4059 flow. Second operand has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:23,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:23,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:23,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:23,891 INFO L124 PetriNetUnfolderBase]: 2070/3791 cut-off events. [2024-06-27 18:02:23,891 INFO L125 PetriNetUnfolderBase]: For 22117/22118 co-relation queries the response was YES. [2024-06-27 18:02:23,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17980 conditions, 3791 events. 2070/3791 cut-off events. For 22117/22118 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 25555 event pairs, 438 based on Foata normal form. 1/3792 useless extension candidates. Maximal degree in co-relation 17869. Up to 1211 conditions per place. [2024-06-27 18:02:23,913 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 206 selfloop transitions, 164 changer transitions 8/381 dead transitions. [2024-06-27 18:02:23,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 381 transitions, 5599 flow [2024-06-27 18:02:23,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-27 18:02:23,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-27 18:02:23,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 249 transitions. [2024-06-27 18:02:23,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44385026737967914 [2024-06-27 18:02:23,915 INFO L175 Difference]: Start difference. First operand has 224 places, 282 transitions, 4059 flow. Second operand 17 states and 249 transitions. [2024-06-27 18:02:23,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 381 transitions, 5599 flow [2024-06-27 18:02:23,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 381 transitions, 5215 flow, removed 6 selfloop flow, removed 21 redundant places. [2024-06-27 18:02:23,975 INFO L231 Difference]: Finished difference. Result has 230 places, 316 transitions, 4782 flow [2024-06-27 18:02:23,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=3731, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4782, PETRI_PLACES=230, PETRI_TRANSITIONS=316} [2024-06-27 18:02:23,976 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 199 predicate places. [2024-06-27 18:02:23,976 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 316 transitions, 4782 flow [2024-06-27 18:02:23,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:23,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:23,976 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:23,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 18:02:23,977 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:23,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:23,977 INFO L85 PathProgramCache]: Analyzing trace with hash 2132747899, now seen corresponding path program 12 times [2024-06-27 18:02:23,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:23,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258010825] [2024-06-27 18:02:23,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:23,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:24,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:24,400 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:02:24,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:24,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258010825] [2024-06-27 18:02:24,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258010825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:24,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:02:24,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 18:02:24,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069455665] [2024-06-27 18:02:24,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:24,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:02:24,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:24,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:02:24,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:02:24,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:24,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 316 transitions, 4782 flow. Second operand has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:24,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:24,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:24,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:25,548 INFO L124 PetriNetUnfolderBase]: 2188/4003 cut-off events. [2024-06-27 18:02:25,549 INFO L125 PetriNetUnfolderBase]: For 25902/25902 co-relation queries the response was YES. [2024-06-27 18:02:25,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19626 conditions, 4003 events. 2188/4003 cut-off events. For 25902/25902 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 27277 event pairs, 322 based on Foata normal form. 1/4004 useless extension candidates. Maximal degree in co-relation 19505. Up to 1145 conditions per place. [2024-06-27 18:02:25,600 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 203 selfloop transitions, 207 changer transitions 7/420 dead transitions. [2024-06-27 18:02:25,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 420 transitions, 6322 flow [2024-06-27 18:02:25,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-06-27 18:02:25,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-06-27 18:02:25,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 304 transitions. [2024-06-27 18:02:25,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46060606060606063 [2024-06-27 18:02:25,611 INFO L175 Difference]: Start difference. First operand has 230 places, 316 transitions, 4782 flow. Second operand 20 states and 304 transitions. [2024-06-27 18:02:25,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 420 transitions, 6322 flow [2024-06-27 18:02:25,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 420 transitions, 6236 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-27 18:02:25,709 INFO L231 Difference]: Finished difference. Result has 251 places, 338 transitions, 5537 flow [2024-06-27 18:02:25,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=4721, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=5537, PETRI_PLACES=251, PETRI_TRANSITIONS=338} [2024-06-27 18:02:25,710 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 220 predicate places. [2024-06-27 18:02:25,710 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 338 transitions, 5537 flow [2024-06-27 18:02:25,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:25,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:25,710 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:25,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 18:02:25,710 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:25,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:25,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1333707895, now seen corresponding path program 13 times [2024-06-27 18:02:25,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:25,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050615799] [2024-06-27 18:02:25,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:25,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:25,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:26,135 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:02:26,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:26,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050615799] [2024-06-27 18:02:26,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050615799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:26,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:02:26,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 18:02:26,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951496190] [2024-06-27 18:02:26,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:26,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:02:26,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:26,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:02:26,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:02:26,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:26,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 338 transitions, 5537 flow. Second operand has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:26,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:26,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:26,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:27,525 INFO L124 PetriNetUnfolderBase]: 2298/4209 cut-off events. [2024-06-27 18:02:27,525 INFO L125 PetriNetUnfolderBase]: For 32772/32772 co-relation queries the response was YES. [2024-06-27 18:02:27,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21730 conditions, 4209 events. 2298/4209 cut-off events. For 32772/32772 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 28991 event pairs, 144 based on Foata normal form. 1/4210 useless extension candidates. Maximal degree in co-relation 21604. Up to 719 conditions per place. [2024-06-27 18:02:27,558 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 180 selfloop transitions, 271 changer transitions 7/461 dead transitions. [2024-06-27 18:02:27,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 461 transitions, 7212 flow [2024-06-27 18:02:27,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-06-27 18:02:27,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-06-27 18:02:27,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 384 transitions. [2024-06-27 18:02:27,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46545454545454545 [2024-06-27 18:02:27,560 INFO L175 Difference]: Start difference. First operand has 251 places, 338 transitions, 5537 flow. Second operand 25 states and 384 transitions. [2024-06-27 18:02:27,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 461 transitions, 7212 flow [2024-06-27 18:02:27,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 461 transitions, 6787 flow, removed 39 selfloop flow, removed 11 redundant places. [2024-06-27 18:02:27,664 INFO L231 Difference]: Finished difference. Result has 270 places, 357 transitions, 6101 flow [2024-06-27 18:02:27,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=5152, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=6101, PETRI_PLACES=270, PETRI_TRANSITIONS=357} [2024-06-27 18:02:27,664 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 239 predicate places. [2024-06-27 18:02:27,665 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 357 transitions, 6101 flow [2024-06-27 18:02:27,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:27,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:27,665 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:27,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 18:02:27,665 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:27,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:27,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1535866569, now seen corresponding path program 14 times [2024-06-27 18:02:27,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:27,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449809761] [2024-06-27 18:02:27,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:27,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:27,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:28,043 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:02:28,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:28,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449809761] [2024-06-27 18:02:28,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449809761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:28,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:02:28,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 18:02:28,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675203278] [2024-06-27 18:02:28,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:28,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:02:28,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:28,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:02:28,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:02:28,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:28,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 357 transitions, 6101 flow. Second operand has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:28,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:28,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:28,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:29,187 INFO L124 PetriNetUnfolderBase]: 2334/4276 cut-off events. [2024-06-27 18:02:29,187 INFO L125 PetriNetUnfolderBase]: For 34449/34449 co-relation queries the response was YES. [2024-06-27 18:02:29,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22527 conditions, 4276 events. 2334/4276 cut-off events. For 34449/34449 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 29620 event pairs, 269 based on Foata normal form. 1/4277 useless extension candidates. Maximal degree in co-relation 22398. Up to 1199 conditions per place. [2024-06-27 18:02:29,214 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 220 selfloop transitions, 229 changer transitions 8/460 dead transitions. [2024-06-27 18:02:29,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 460 transitions, 7509 flow [2024-06-27 18:02:29,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-06-27 18:02:29,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-06-27 18:02:29,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 352 transitions. [2024-06-27 18:02:29,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.463768115942029 [2024-06-27 18:02:29,216 INFO L175 Difference]: Start difference. First operand has 270 places, 357 transitions, 6101 flow. Second operand 23 states and 352 transitions. [2024-06-27 18:02:29,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 460 transitions, 7509 flow [2024-06-27 18:02:29,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 460 transitions, 7215 flow, removed 23 selfloop flow, removed 10 redundant places. [2024-06-27 18:02:29,331 INFO L231 Difference]: Finished difference. Result has 283 places, 362 transitions, 6381 flow [2024-06-27 18:02:29,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=5824, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=6381, PETRI_PLACES=283, PETRI_TRANSITIONS=362} [2024-06-27 18:02:29,331 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 252 predicate places. [2024-06-27 18:02:29,331 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 362 transitions, 6381 flow [2024-06-27 18:02:29,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:29,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:29,332 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:29,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 18:02:29,332 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:29,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:29,333 INFO L85 PathProgramCache]: Analyzing trace with hash 745962573, now seen corresponding path program 15 times [2024-06-27 18:02:29,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:29,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596381853] [2024-06-27 18:02:29,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:29,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:29,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:29,746 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:02:29,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:29,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596381853] [2024-06-27 18:02:29,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596381853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:29,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:02:29,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 18:02:29,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746601491] [2024-06-27 18:02:29,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:29,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:02:29,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:29,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:02:29,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:02:29,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:29,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 362 transitions, 6381 flow. Second operand has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:29,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:29,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:29,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:30,921 INFO L124 PetriNetUnfolderBase]: 2329/4269 cut-off events. [2024-06-27 18:02:30,921 INFO L125 PetriNetUnfolderBase]: For 36432/36432 co-relation queries the response was YES. [2024-06-27 18:02:30,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22789 conditions, 4269 events. 2329/4269 cut-off events. For 36432/36432 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 29539 event pairs, 138 based on Foata normal form. 1/4270 useless extension candidates. Maximal degree in co-relation 22659. Up to 761 conditions per place. [2024-06-27 18:02:30,958 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 164 selfloop transitions, 276 changer transitions 7/450 dead transitions. [2024-06-27 18:02:30,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 450 transitions, 7624 flow [2024-06-27 18:02:30,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-06-27 18:02:30,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-06-27 18:02:30,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 342 transitions. [2024-06-27 18:02:30,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4505928853754941 [2024-06-27 18:02:30,960 INFO L175 Difference]: Start difference. First operand has 283 places, 362 transitions, 6381 flow. Second operand 23 states and 342 transitions. [2024-06-27 18:02:30,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 450 transitions, 7624 flow [2024-06-27 18:02:31,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 450 transitions, 7073 flow, removed 11 selfloop flow, removed 20 redundant places. [2024-06-27 18:02:31,089 INFO L231 Difference]: Finished difference. Result has 286 places, 362 transitions, 6401 flow [2024-06-27 18:02:31,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=5842, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=6401, PETRI_PLACES=286, PETRI_TRANSITIONS=362} [2024-06-27 18:02:31,089 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 255 predicate places. [2024-06-27 18:02:31,089 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 362 transitions, 6401 flow [2024-06-27 18:02:31,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:31,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:31,090 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:31,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 18:02:31,090 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:31,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:31,091 INFO L85 PathProgramCache]: Analyzing trace with hash -302394427, now seen corresponding path program 16 times [2024-06-27 18:02:31,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:31,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609740505] [2024-06-27 18:02:31,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:31,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:31,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:31,448 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:02:31,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:31,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609740505] [2024-06-27 18:02:31,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609740505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:31,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:02:31,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 18:02:31,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689281714] [2024-06-27 18:02:31,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:31,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:02:31,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:31,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:02:31,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:02:31,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:31,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 362 transitions, 6401 flow. Second operand has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:31,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:31,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:31,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:32,721 INFO L124 PetriNetUnfolderBase]: 2380/4353 cut-off events. [2024-06-27 18:02:32,722 INFO L125 PetriNetUnfolderBase]: For 35674/35674 co-relation queries the response was YES. [2024-06-27 18:02:32,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23199 conditions, 4353 events. 2380/4353 cut-off events. For 35674/35674 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 30243 event pairs, 317 based on Foata normal form. 1/4354 useless extension candidates. Maximal degree in co-relation 23068. Up to 1297 conditions per place. [2024-06-27 18:02:32,761 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 205 selfloop transitions, 232 changer transitions 8/448 dead transitions. [2024-06-27 18:02:32,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 448 transitions, 7664 flow [2024-06-27 18:02:32,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-06-27 18:02:32,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-06-27 18:02:32,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 306 transitions. [2024-06-27 18:02:32,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636363636363636 [2024-06-27 18:02:32,763 INFO L175 Difference]: Start difference. First operand has 286 places, 362 transitions, 6401 flow. Second operand 20 states and 306 transitions. [2024-06-27 18:02:32,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 448 transitions, 7664 flow [2024-06-27 18:02:32,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 448 transitions, 7095 flow, removed 7 selfloop flow, removed 20 redundant places. [2024-06-27 18:02:32,892 INFO L231 Difference]: Finished difference. Result has 286 places, 365 transitions, 6423 flow [2024-06-27 18:02:32,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=5850, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=6423, PETRI_PLACES=286, PETRI_TRANSITIONS=365} [2024-06-27 18:02:32,895 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 255 predicate places. [2024-06-27 18:02:32,895 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 365 transitions, 6423 flow [2024-06-27 18:02:32,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:32,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:32,895 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:32,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 18:02:32,895 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:32,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:32,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1751527113, now seen corresponding path program 17 times [2024-06-27 18:02:32,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:32,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936872439] [2024-06-27 18:02:32,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:32,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:32,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:33,282 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:02:33,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:33,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936872439] [2024-06-27 18:02:33,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936872439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:33,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:02:33,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 18:02:33,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929981853] [2024-06-27 18:02:33,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:33,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:02:33,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:33,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:02:33,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:02:33,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:33,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 365 transitions, 6423 flow. Second operand has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:33,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:33,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:33,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:34,358 INFO L124 PetriNetUnfolderBase]: 2387/4365 cut-off events. [2024-06-27 18:02:34,358 INFO L125 PetriNetUnfolderBase]: For 37249/37249 co-relation queries the response was YES. [2024-06-27 18:02:34,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23170 conditions, 4365 events. 2387/4365 cut-off events. For 37249/37249 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 30274 event pairs, 96 based on Foata normal form. 1/4366 useless extension candidates. Maximal degree in co-relation 23039. Up to 957 conditions per place. [2024-06-27 18:02:34,395 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 147 selfloop transitions, 293 changer transitions 7/450 dead transitions. [2024-06-27 18:02:34,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 450 transitions, 7785 flow [2024-06-27 18:02:34,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-06-27 18:02:34,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-06-27 18:02:34,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 292 transitions. [2024-06-27 18:02:34,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4213564213564214 [2024-06-27 18:02:34,396 INFO L175 Difference]: Start difference. First operand has 286 places, 365 transitions, 6423 flow. Second operand 21 states and 292 transitions. [2024-06-27 18:02:34,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 450 transitions, 7785 flow [2024-06-27 18:02:34,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 450 transitions, 7340 flow, removed 6 selfloop flow, removed 20 redundant places. [2024-06-27 18:02:34,542 INFO L231 Difference]: Finished difference. Result has 289 places, 376 transitions, 6813 flow [2024-06-27 18:02:34,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=6004, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=282, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6813, PETRI_PLACES=289, PETRI_TRANSITIONS=376} [2024-06-27 18:02:34,543 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 258 predicate places. [2024-06-27 18:02:34,543 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 376 transitions, 6813 flow [2024-06-27 18:02:34,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:34,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:34,543 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:34,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 18:02:34,543 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:34,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:34,544 INFO L85 PathProgramCache]: Analyzing trace with hash -938529911, now seen corresponding path program 18 times [2024-06-27 18:02:34,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:34,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273335907] [2024-06-27 18:02:34,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:34,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:34,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:34,879 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:02:34,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:34,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273335907] [2024-06-27 18:02:34,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273335907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:34,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:02:34,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 18:02:34,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610837393] [2024-06-27 18:02:34,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:34,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:02:34,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:34,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:02:34,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:02:34,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:34,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 376 transitions, 6813 flow. Second operand has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:34,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:34,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:34,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:36,297 INFO L124 PetriNetUnfolderBase]: 2686/4901 cut-off events. [2024-06-27 18:02:36,297 INFO L125 PetriNetUnfolderBase]: For 38687/38687 co-relation queries the response was YES. [2024-06-27 18:02:36,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26245 conditions, 4901 events. 2686/4901 cut-off events. For 38687/38687 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 34605 event pairs, 153 based on Foata normal form. 1/4902 useless extension candidates. Maximal degree in co-relation 26113. Up to 841 conditions per place. [2024-06-27 18:02:36,337 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 203 selfloop transitions, 315 changer transitions 8/529 dead transitions. [2024-06-27 18:02:36,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 529 transitions, 8777 flow [2024-06-27 18:02:36,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-06-27 18:02:36,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-06-27 18:02:36,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 436 transitions. [2024-06-27 18:02:36,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4404040404040404 [2024-06-27 18:02:36,341 INFO L175 Difference]: Start difference. First operand has 289 places, 376 transitions, 6813 flow. Second operand 30 states and 436 transitions. [2024-06-27 18:02:36,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 529 transitions, 8777 flow [2024-06-27 18:02:36,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 529 transitions, 8439 flow, removed 30 selfloop flow, removed 10 redundant places. [2024-06-27 18:02:36,490 INFO L231 Difference]: Finished difference. Result has 311 places, 402 transitions, 7577 flow [2024-06-27 18:02:36,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=6528, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=288, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=7577, PETRI_PLACES=311, PETRI_TRANSITIONS=402} [2024-06-27 18:02:36,491 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 280 predicate places. [2024-06-27 18:02:36,491 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 402 transitions, 7577 flow [2024-06-27 18:02:36,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:36,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:36,491 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:36,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 18:02:36,491 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:36,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:36,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1564882739, now seen corresponding path program 19 times [2024-06-27 18:02:36,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:36,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918649897] [2024-06-27 18:02:36,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:36,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:36,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:36,863 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:02:36,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:36,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918649897] [2024-06-27 18:02:36,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918649897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:36,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:02:36,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 18:02:36,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565956017] [2024-06-27 18:02:36,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:36,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:02:36,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:36,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:02:36,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:02:36,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:36,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 402 transitions, 7577 flow. Second operand has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:36,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:36,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:36,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:37,987 INFO L124 PetriNetUnfolderBase]: 2732/4989 cut-off events. [2024-06-27 18:02:37,987 INFO L125 PetriNetUnfolderBase]: For 40817/40817 co-relation queries the response was YES. [2024-06-27 18:02:38,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27458 conditions, 4989 events. 2732/4989 cut-off events. For 40817/40817 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 35319 event pairs, 292 based on Foata normal form. 1/4990 useless extension candidates. Maximal degree in co-relation 27325. Up to 1108 conditions per place. [2024-06-27 18:02:38,033 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 238 selfloop transitions, 235 changer transitions 7/483 dead transitions. [2024-06-27 18:02:38,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 483 transitions, 8950 flow [2024-06-27 18:02:38,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-27 18:02:38,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-27 18:02:38,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 281 transitions. [2024-06-27 18:02:38,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481658692185008 [2024-06-27 18:02:38,034 INFO L175 Difference]: Start difference. First operand has 311 places, 402 transitions, 7577 flow. Second operand 19 states and 281 transitions. [2024-06-27 18:02:38,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 483 transitions, 8950 flow [2024-06-27 18:02:38,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 483 transitions, 8364 flow, removed 32 selfloop flow, removed 25 redundant places. [2024-06-27 18:02:38,201 INFO L231 Difference]: Finished difference. Result has 307 places, 408 transitions, 7630 flow [2024-06-27 18:02:38,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=7019, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=7630, PETRI_PLACES=307, PETRI_TRANSITIONS=408} [2024-06-27 18:02:38,202 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 276 predicate places. [2024-06-27 18:02:38,202 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 408 transitions, 7630 flow [2024-06-27 18:02:38,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:38,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:38,203 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:38,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 18:02:38,203 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:38,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:38,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1931044553, now seen corresponding path program 20 times [2024-06-27 18:02:38,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:38,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741566032] [2024-06-27 18:02:38,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:38,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:38,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:38,561 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:02:38,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:38,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741566032] [2024-06-27 18:02:38,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741566032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:38,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:02:38,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 18:02:38,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007278193] [2024-06-27 18:02:38,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:38,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:02:38,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:38,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:02:38,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:02:38,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:38,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 408 transitions, 7630 flow. Second operand has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:38,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:38,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:38,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:39,970 INFO L124 PetriNetUnfolderBase]: 2723/4968 cut-off events. [2024-06-27 18:02:39,971 INFO L125 PetriNetUnfolderBase]: For 40685/40685 co-relation queries the response was YES. [2024-06-27 18:02:39,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27218 conditions, 4968 events. 2723/4968 cut-off events. For 40685/40685 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 35159 event pairs, 144 based on Foata normal form. 1/4969 useless extension candidates. Maximal degree in co-relation 27092. Up to 854 conditions per place. [2024-06-27 18:02:40,011 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 191 selfloop transitions, 334 changer transitions 8/536 dead transitions. [2024-06-27 18:02:40,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 536 transitions, 9152 flow [2024-06-27 18:02:40,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-06-27 18:02:40,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-06-27 18:02:40,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 468 transitions. [2024-06-27 18:02:40,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4297520661157025 [2024-06-27 18:02:40,012 INFO L175 Difference]: Start difference. First operand has 307 places, 408 transitions, 7630 flow. Second operand 33 states and 468 transitions. [2024-06-27 18:02:40,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 536 transitions, 9152 flow [2024-06-27 18:02:40,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 536 transitions, 8774 flow, removed 11 selfloop flow, removed 12 redundant places. [2024-06-27 18:02:40,159 INFO L231 Difference]: Finished difference. Result has 327 places, 408 transitions, 7933 flow [2024-06-27 18:02:40,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=7266, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=333, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=7933, PETRI_PLACES=327, PETRI_TRANSITIONS=408} [2024-06-27 18:02:40,160 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 296 predicate places. [2024-06-27 18:02:40,160 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 408 transitions, 7933 flow [2024-06-27 18:02:40,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:40,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:40,160 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:40,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 18:02:40,160 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:40,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:40,160 INFO L85 PathProgramCache]: Analyzing trace with hash -999425339, now seen corresponding path program 1 times [2024-06-27 18:02:40,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:40,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290378271] [2024-06-27 18:02:40,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:40,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:40,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:40,202 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:02:40,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:40,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290378271] [2024-06-27 18:02:40,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290378271] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:02:40,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356344963] [2024-06-27 18:02:40,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:40,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:40,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:02:40,204 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:02:40,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-06-27 18:02:40,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:40,356 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 4 conjunts are in the unsatisfiable core [2024-06-27 18:02:40,358 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:02:40,375 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:02:40,375 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:02:40,422 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:02:40,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356344963] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:02:40,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:02:40,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-06-27 18:02:40,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755253142] [2024-06-27 18:02:40,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:02:40,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:02:40,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:40,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:02:40,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:02:40,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:40,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 408 transitions, 7933 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:40,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:40,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:40,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:41,300 INFO L124 PetriNetUnfolderBase]: 3271/5880 cut-off events. [2024-06-27 18:02:41,300 INFO L125 PetriNetUnfolderBase]: For 48440/48440 co-relation queries the response was YES. [2024-06-27 18:02:41,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34457 conditions, 5880 events. 3271/5880 cut-off events. For 48440/48440 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 40199 event pairs, 1017 based on Foata normal form. 415/6295 useless extension candidates. Maximal degree in co-relation 34332. Up to 1631 conditions per place. [2024-06-27 18:02:41,351 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 570 selfloop transitions, 122 changer transitions 0/695 dead transitions. [2024-06-27 18:02:41,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 695 transitions, 13945 flow [2024-06-27 18:02:41,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:02:41,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:02:41,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-27 18:02:41,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 18:02:41,352 INFO L175 Difference]: Start difference. First operand has 327 places, 408 transitions, 7933 flow. Second operand 7 states and 154 transitions. [2024-06-27 18:02:41,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 695 transitions, 13945 flow [2024-06-27 18:02:41,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 695 transitions, 12633 flow, removed 10 selfloop flow, removed 34 redundant places. [2024-06-27 18:02:41,540 INFO L231 Difference]: Finished difference. Result has 302 places, 456 transitions, 8295 flow [2024-06-27 18:02:41,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=7154, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8295, PETRI_PLACES=302, PETRI_TRANSITIONS=456} [2024-06-27 18:02:41,540 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 271 predicate places. [2024-06-27 18:02:41,541 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 456 transitions, 8295 flow [2024-06-27 18:02:41,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:41,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:41,541 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:41,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-06-27 18:02:41,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:41,744 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:41,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:41,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1359516440, now seen corresponding path program 1 times [2024-06-27 18:02:41,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:41,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401360600] [2024-06-27 18:02:41,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:41,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:41,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:41,789 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:02:41,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:41,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401360600] [2024-06-27 18:02:41,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401360600] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:02:41,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296543090] [2024-06-27 18:02:41,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:41,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:41,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:02:41,801 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:02:41,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-06-27 18:02:41,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:41,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 4 conjunts are in the unsatisfiable core [2024-06-27 18:02:41,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:02:41,950 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:02:41,951 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:02:41,974 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:02:41,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296543090] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:02:41,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:02:41,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-06-27 18:02:41,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265327447] [2024-06-27 18:02:41,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:02:41,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:02:41,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:41,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:02:41,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:02:41,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:41,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 456 transitions, 8295 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:41,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:41,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:41,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:43,039 INFO L124 PetriNetUnfolderBase]: 3887/6868 cut-off events. [2024-06-27 18:02:43,040 INFO L125 PetriNetUnfolderBase]: For 51339/51339 co-relation queries the response was YES. [2024-06-27 18:02:43,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41306 conditions, 6868 events. 3887/6868 cut-off events. For 51339/51339 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 45561 event pairs, 556 based on Foata normal form. 573/7441 useless extension candidates. Maximal degree in co-relation 41183. Up to 1881 conditions per place. [2024-06-27 18:02:43,102 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 641 selfloop transitions, 99 changer transitions 0/743 dead transitions. [2024-06-27 18:02:43,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 743 transitions, 14378 flow [2024-06-27 18:02:43,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:02:43,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:02:43,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 18:02:43,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5568181818181818 [2024-06-27 18:02:43,103 INFO L175 Difference]: Start difference. First operand has 302 places, 456 transitions, 8295 flow. Second operand 8 states and 147 transitions. [2024-06-27 18:02:43,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 743 transitions, 14378 flow [2024-06-27 18:02:43,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 743 transitions, 14220 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-27 18:02:43,391 INFO L231 Difference]: Finished difference. Result has 310 places, 494 transitions, 9093 flow [2024-06-27 18:02:43,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=8201, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9093, PETRI_PLACES=310, PETRI_TRANSITIONS=494} [2024-06-27 18:02:43,392 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 279 predicate places. [2024-06-27 18:02:43,392 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 494 transitions, 9093 flow [2024-06-27 18:02:43,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:43,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:43,392 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:43,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-06-27 18:02:43,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-06-27 18:02:43,604 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:43,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:43,604 INFO L85 PathProgramCache]: Analyzing trace with hash -2055973173, now seen corresponding path program 1 times [2024-06-27 18:02:43,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:43,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137728855] [2024-06-27 18:02:43,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:43,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:43,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:43,927 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:02:43,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:43,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137728855] [2024-06-27 18:02:43,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137728855] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:02:43,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485056883] [2024-06-27 18:02:43,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:43,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:43,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:02:43,929 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:02:43,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-06-27 18:02:44,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:44,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 11 conjunts are in the unsatisfiable core [2024-06-27 18:02:44,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:02:44,147 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:02:44,147 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:02:44,241 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-06-27 18:02:44,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-06-27 18:02:44,262 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:02:44,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485056883] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:02:44,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:02:44,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 16 [2024-06-27 18:02:44,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397614188] [2024-06-27 18:02:44,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:02:44,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-06-27 18:02:44,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:44,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-06-27 18:02:44,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2024-06-27 18:02:44,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:44,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 494 transitions, 9093 flow. Second operand has 16 states, 16 states have (on average 9.8125) internal successors, (157), 16 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:44,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:44,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:44,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:45,915 INFO L124 PetriNetUnfolderBase]: 3957/6984 cut-off events. [2024-06-27 18:02:45,915 INFO L125 PetriNetUnfolderBase]: For 61218/61218 co-relation queries the response was YES. [2024-06-27 18:02:45,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44222 conditions, 6984 events. 3957/6984 cut-off events. For 61218/61218 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 46575 event pairs, 454 based on Foata normal form. 56/7040 useless extension candidates. Maximal degree in co-relation 44095. Up to 1610 conditions per place. [2024-06-27 18:02:45,973 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 203 selfloop transitions, 377 changer transitions 1/584 dead transitions. [2024-06-27 18:02:45,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 584 transitions, 10958 flow [2024-06-27 18:02:45,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-06-27 18:02:45,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-06-27 18:02:45,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 263 transitions. [2024-06-27 18:02:45,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44276094276094274 [2024-06-27 18:02:45,974 INFO L175 Difference]: Start difference. First operand has 310 places, 494 transitions, 9093 flow. Second operand 18 states and 263 transitions. [2024-06-27 18:02:45,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 584 transitions, 10958 flow [2024-06-27 18:02:46,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 584 transitions, 10754 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 18:02:46,268 INFO L231 Difference]: Finished difference. Result has 324 places, 515 transitions, 10129 flow [2024-06-27 18:02:46,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=8832, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=351, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=10129, PETRI_PLACES=324, PETRI_TRANSITIONS=515} [2024-06-27 18:02:46,269 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 293 predicate places. [2024-06-27 18:02:46,269 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 515 transitions, 10129 flow [2024-06-27 18:02:46,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.8125) internal successors, (157), 16 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:46,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:46,270 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:46,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-06-27 18:02:46,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:46,478 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:46,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:46,478 INFO L85 PathProgramCache]: Analyzing trace with hash -554357885, now seen corresponding path program 2 times [2024-06-27 18:02:46,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:46,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787368651] [2024-06-27 18:02:46,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:46,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:46,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:46,780 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:02:46,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:46,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787368651] [2024-06-27 18:02:46,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787368651] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:02:46,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960595267] [2024-06-27 18:02:46,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 18:02:46,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:46,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:02:46,782 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:02:46,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-06-27 18:02:46,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 18:02:46,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:02:46,921 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 21 conjunts are in the unsatisfiable core [2024-06-27 18:02:46,923 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:02:47,073 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:02:47,074 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:02:47,162 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-06-27 18:02:47,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-06-27 18:02:47,199 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:02:47,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960595267] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:02:47,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:02:47,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 16 [2024-06-27 18:02:47,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566390490] [2024-06-27 18:02:47,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:02:47,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-06-27 18:02:47,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:47,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-06-27 18:02:47,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2024-06-27 18:02:47,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:47,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 515 transitions, 10129 flow. Second operand has 16 states, 16 states have (on average 9.75) internal successors, (156), 16 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:47,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:47,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:47,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:49,392 INFO L124 PetriNetUnfolderBase]: 4959/8815 cut-off events. [2024-06-27 18:02:49,392 INFO L125 PetriNetUnfolderBase]: For 78925/78925 co-relation queries the response was YES. [2024-06-27 18:02:49,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57435 conditions, 8815 events. 4959/8815 cut-off events. For 78925/78925 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 62053 event pairs, 707 based on Foata normal form. 45/8860 useless extension candidates. Maximal degree in co-relation 57304. Up to 1958 conditions per place. [2024-06-27 18:02:49,465 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 298 selfloop transitions, 399 changer transitions 2/702 dead transitions. [2024-06-27 18:02:49,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 702 transitions, 13345 flow [2024-06-27 18:02:49,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-06-27 18:02:49,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-06-27 18:02:49,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 377 transitions. [2024-06-27 18:02:49,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.476010101010101 [2024-06-27 18:02:49,471 INFO L175 Difference]: Start difference. First operand has 324 places, 515 transitions, 10129 flow. Second operand 24 states and 377 transitions. [2024-06-27 18:02:49,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 702 transitions, 13345 flow [2024-06-27 18:02:49,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 702 transitions, 13019 flow, removed 20 selfloop flow, removed 11 redundant places. [2024-06-27 18:02:49,900 INFO L231 Difference]: Finished difference. Result has 343 places, 578 transitions, 12199 flow [2024-06-27 18:02:49,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=9624, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=327, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=12199, PETRI_PLACES=343, PETRI_TRANSITIONS=578} [2024-06-27 18:02:49,901 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 312 predicate places. [2024-06-27 18:02:49,901 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 578 transitions, 12199 flow [2024-06-27 18:02:49,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.75) internal successors, (156), 16 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:49,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:49,901 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:49,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-06-27 18:02:50,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:50,104 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:50,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:50,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1846534256, now seen corresponding path program 1 times [2024-06-27 18:02:50,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:50,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203629983] [2024-06-27 18:02:50,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:50,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:50,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:50,396 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:02:50,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:50,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203629983] [2024-06-27 18:02:50,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203629983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:50,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:02:50,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:02:50,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873571440] [2024-06-27 18:02:50,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:50,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:02:50,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:50,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:02:50,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:02:50,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:50,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 578 transitions, 12199 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 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 18:02:50,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:50,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:50,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:52,636 INFO L124 PetriNetUnfolderBase]: 5014/8953 cut-off events. [2024-06-27 18:02:52,637 INFO L125 PetriNetUnfolderBase]: For 93870/93870 co-relation queries the response was YES. [2024-06-27 18:02:52,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61585 conditions, 8953 events. 5014/8953 cut-off events. For 93870/93870 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 63697 event pairs, 1352 based on Foata normal form. 5/8958 useless extension candidates. Maximal degree in co-relation 61449. Up to 3386 conditions per place. [2024-06-27 18:02:52,709 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 368 selfloop transitions, 260 changer transitions 5/636 dead transitions. [2024-06-27 18:02:52,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 636 transitions, 13753 flow [2024-06-27 18:02:52,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-27 18:02:52,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-27 18:02:52,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 216 transitions. [2024-06-27 18:02:52,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43636363636363634 [2024-06-27 18:02:52,710 INFO L175 Difference]: Start difference. First operand has 343 places, 578 transitions, 12199 flow. Second operand 15 states and 216 transitions. [2024-06-27 18:02:52,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 636 transitions, 13753 flow [2024-06-27 18:02:53,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 636 transitions, 13343 flow, removed 31 selfloop flow, removed 11 redundant places. [2024-06-27 18:02:53,245 INFO L231 Difference]: Finished difference. Result has 346 places, 580 transitions, 12363 flow [2024-06-27 18:02:53,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=11762, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=255, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=12363, PETRI_PLACES=346, PETRI_TRANSITIONS=580} [2024-06-27 18:02:53,246 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 315 predicate places. [2024-06-27 18:02:53,246 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 580 transitions, 12363 flow [2024-06-27 18:02:53,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 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 18:02:53,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:53,247 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:53,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 18:02:53,248 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:53,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:53,248 INFO L85 PathProgramCache]: Analyzing trace with hash 2006116005, now seen corresponding path program 3 times [2024-06-27 18:02:53,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:53,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553913140] [2024-06-27 18:02:53,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:53,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:53,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:53,587 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:02:53,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:53,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553913140] [2024-06-27 18:02:53,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553913140] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:02:53,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259676587] [2024-06-27 18:02:53,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 18:02:53,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:02:53,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:02:53,592 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:02:53,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-06-27 18:02:53,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 18:02:53,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:02:53,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 21 conjunts are in the unsatisfiable core [2024-06-27 18:02:53,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:02:53,846 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 18:02:53,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 70 [2024-06-27 18:02:53,880 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:02:53,880 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:02:53,967 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-06-27 18:02:53,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-06-27 18:02:53,985 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:02:53,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259676587] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:02:53,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:02:53,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 18 [2024-06-27 18:02:53,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247455200] [2024-06-27 18:02:53,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:02:53,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-06-27 18:02:53,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:53,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-06-27 18:02:53,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-06-27 18:02:53,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:53,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 580 transitions, 12363 flow. Second operand has 18 states, 18 states have (on average 9.333333333333334) internal successors, (168), 18 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:53,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:53,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:53,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:02:57,247 INFO L124 PetriNetUnfolderBase]: 6943/12137 cut-off events. [2024-06-27 18:02:57,247 INFO L125 PetriNetUnfolderBase]: For 133643/133643 co-relation queries the response was YES. [2024-06-27 18:02:57,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87595 conditions, 12137 events. 6943/12137 cut-off events. For 133643/133643 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 88324 event pairs, 1021 based on Foata normal form. 36/12173 useless extension candidates. Maximal degree in co-relation 87461. Up to 3073 conditions per place. [2024-06-27 18:02:57,353 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 319 selfloop transitions, 518 changer transitions 4/844 dead transitions. [2024-06-27 18:02:57,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 844 transitions, 17674 flow [2024-06-27 18:02:57,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-06-27 18:02:57,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-06-27 18:02:57,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 420 transitions. [2024-06-27 18:02:57,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 18:02:57,354 INFO L175 Difference]: Start difference. First operand has 346 places, 580 transitions, 12363 flow. Second operand 28 states and 420 transitions. [2024-06-27 18:02:57,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 844 transitions, 17674 flow [2024-06-27 18:02:58,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 844 transitions, 17437 flow, removed 3 selfloop flow, removed 14 redundant places. [2024-06-27 18:02:58,251 INFO L231 Difference]: Finished difference. Result has 363 places, 711 transitions, 16577 flow [2024-06-27 18:02:58,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=11858, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=382, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=16577, PETRI_PLACES=363, PETRI_TRANSITIONS=711} [2024-06-27 18:02:58,252 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 332 predicate places. [2024-06-27 18:02:58,252 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 711 transitions, 16577 flow [2024-06-27 18:02:58,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.333333333333334) internal successors, (168), 18 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:02:58,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:02:58,253 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:02:58,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-06-27 18:02:58,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-06-27 18:02:58,467 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:02:58,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:02:58,467 INFO L85 PathProgramCache]: Analyzing trace with hash -416939420, now seen corresponding path program 2 times [2024-06-27 18:02:58,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:02:58,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210338167] [2024-06-27 18:02:58,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:02:58,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:02:58,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:02:58,810 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:02:58,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:02:58,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210338167] [2024-06-27 18:02:58,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210338167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:02:58,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:02:58,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:02:58,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389827086] [2024-06-27 18:02:58,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:02:58,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:02:58,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:02:58,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:02:58,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:02:58,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:02:58,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 711 transitions, 16577 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 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 18:02:58,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:02:58,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:02:58,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:01,792 INFO L124 PetriNetUnfolderBase]: 6933/12132 cut-off events. [2024-06-27 18:03:01,792 INFO L125 PetriNetUnfolderBase]: For 154972/154972 co-relation queries the response was YES. [2024-06-27 18:03:01,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93493 conditions, 12132 events. 6933/12132 cut-off events. For 154972/154972 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 88224 event pairs, 1776 based on Foata normal form. 5/12137 useless extension candidates. Maximal degree in co-relation 93352. Up to 5151 conditions per place. [2024-06-27 18:03:01,926 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 426 selfloop transitions, 329 changer transitions 3/761 dead transitions. [2024-06-27 18:03:01,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 761 transitions, 18246 flow [2024-06-27 18:03:01,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 18:03:01,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 18:03:01,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 207 transitions. [2024-06-27 18:03:01,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44805194805194803 [2024-06-27 18:03:01,928 INFO L175 Difference]: Start difference. First operand has 363 places, 711 transitions, 16577 flow. Second operand 14 states and 207 transitions. [2024-06-27 18:03:01,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 761 transitions, 18246 flow [2024-06-27 18:03:03,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 761 transitions, 17981 flow, removed 21 selfloop flow, removed 10 redundant places. [2024-06-27 18:03:03,096 INFO L231 Difference]: Finished difference. Result has 366 places, 708 transitions, 16905 flow [2024-06-27 18:03:03,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=16268, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=329, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=16905, PETRI_PLACES=366, PETRI_TRANSITIONS=708} [2024-06-27 18:03:03,097 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 335 predicate places. [2024-06-27 18:03:03,098 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 708 transitions, 16905 flow [2024-06-27 18:03:03,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 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 18:03:03,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:03,098 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:03,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 18:03:03,098 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:03:03,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:03,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1775324299, now seen corresponding path program 4 times [2024-06-27 18:03:03,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:03,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956953560] [2024-06-27 18:03:03,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:03,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:03,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:03,374 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:03:03,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:03,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956953560] [2024-06-27 18:03:03,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956953560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:03:03,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:03:03,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:03:03,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110602631] [2024-06-27 18:03:03,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:03:03,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:03:03,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:03,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:03:03,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:03:03,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:03:03,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 708 transitions, 16905 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 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 18:03:03,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:03,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:03:03,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:06,310 INFO L124 PetriNetUnfolderBase]: 6863/11985 cut-off events. [2024-06-27 18:03:06,311 INFO L125 PetriNetUnfolderBase]: For 165488/165488 co-relation queries the response was YES. [2024-06-27 18:03:06,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94231 conditions, 11985 events. 6863/11985 cut-off events. For 165488/165488 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 86728 event pairs, 2721 based on Foata normal form. 4/11989 useless extension candidates. Maximal degree in co-relation 94091. Up to 7466 conditions per place. [2024-06-27 18:03:06,444 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 576 selfloop transitions, 156 changer transitions 1/736 dead transitions. [2024-06-27 18:03:06,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 736 transitions, 18309 flow [2024-06-27 18:03:06,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 18:03:06,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 18:03:06,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 175 transitions. [2024-06-27 18:03:06,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44191919191919193 [2024-06-27 18:03:06,445 INFO L175 Difference]: Start difference. First operand has 366 places, 708 transitions, 16905 flow. Second operand 12 states and 175 transitions. [2024-06-27 18:03:06,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 736 transitions, 18309 flow [2024-06-27 18:03:07,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 736 transitions, 17070 flow, removed 5 selfloop flow, removed 14 redundant places. [2024-06-27 18:03:07,597 INFO L231 Difference]: Finished difference. Result has 356 places, 699 transitions, 15747 flow [2024-06-27 18:03:07,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=15458, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=15747, PETRI_PLACES=356, PETRI_TRANSITIONS=699} [2024-06-27 18:03:07,598 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 325 predicate places. [2024-06-27 18:03:07,598 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 699 transitions, 15747 flow [2024-06-27 18:03:07,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 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 18:03:07,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:07,598 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:07,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 18:03:07,598 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:03:07,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:07,599 INFO L85 PathProgramCache]: Analyzing trace with hash 247905900, now seen corresponding path program 3 times [2024-06-27 18:03:07,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:07,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124879488] [2024-06-27 18:03:07,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:07,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:07,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:07,870 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:03:07,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:07,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124879488] [2024-06-27 18:03:07,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124879488] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:07,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428587402] [2024-06-27 18:03:07,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 18:03:07,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:07,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:07,877 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:03:07,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-06-27 18:03:08,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 18:03:08,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:03:08,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 21 conjunts are in the unsatisfiable core [2024-06-27 18:03:08,055 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:03:08,178 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 18:03:08,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 70 [2024-06-27 18:03:08,201 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:03:08,201 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:03:08,284 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-06-27 18:03:08,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 103 treesize of output 87 [2024-06-27 18:03:08,318 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:03:08,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428587402] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:08,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 18:03:08,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 9] total 18 [2024-06-27 18:03:08,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588389651] [2024-06-27 18:03:08,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:03:08,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:03:08,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:08,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:03:08,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2024-06-27 18:03:08,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:03:08,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 699 transitions, 15747 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 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 18:03:08,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:08,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:03:08,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:11,286 INFO L124 PetriNetUnfolderBase]: 7188/12704 cut-off events. [2024-06-27 18:03:11,287 INFO L125 PetriNetUnfolderBase]: For 152600/152600 co-relation queries the response was YES. [2024-06-27 18:03:11,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93660 conditions, 12704 events. 7188/12704 cut-off events. For 152600/152600 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 94555 event pairs, 1514 based on Foata normal form. 28/12732 useless extension candidates. Maximal degree in co-relation 93520. Up to 5333 conditions per place. [2024-06-27 18:03:11,431 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 414 selfloop transitions, 346 changer transitions 0/763 dead transitions. [2024-06-27 18:03:11,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 763 transitions, 17845 flow [2024-06-27 18:03:11,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:03:11,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:03:11,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 177 transitions. [2024-06-27 18:03:11,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48760330578512395 [2024-06-27 18:03:11,432 INFO L175 Difference]: Start difference. First operand has 356 places, 699 transitions, 15747 flow. Second operand 11 states and 177 transitions. [2024-06-27 18:03:11,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 763 transitions, 17845 flow [2024-06-27 18:03:12,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 763 transitions, 17644 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 18:03:12,714 INFO L231 Difference]: Finished difference. Result has 358 places, 712 transitions, 16629 flow [2024-06-27 18:03:12,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=15564, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=699, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=333, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=16629, PETRI_PLACES=358, PETRI_TRANSITIONS=712} [2024-06-27 18:03:12,715 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 327 predicate places. [2024-06-27 18:03:12,715 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 712 transitions, 16629 flow [2024-06-27 18:03:12,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 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 18:03:12,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:12,715 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:12,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-06-27 18:03:12,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:12,918 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:03:12,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:12,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1413372405, now seen corresponding path program 5 times [2024-06-27 18:03:12,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:12,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628097103] [2024-06-27 18:03:12,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:12,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:12,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:13,194 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:03:13,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:13,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628097103] [2024-06-27 18:03:13,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628097103] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:13,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932054819] [2024-06-27 18:03:13,195 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 18:03:13,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:13,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:13,196 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:03:13,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-06-27 18:03:13,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-27 18:03:13,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:03:13,395 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 17 conjunts are in the unsatisfiable core [2024-06-27 18:03:13,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:03:13,512 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 18:03:13,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 74 [2024-06-27 18:03:13,538 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:03:13,539 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:03:13,612 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-27 18:03:13,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 111 treesize of output 95 [2024-06-27 18:03:13,659 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:03:13,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932054819] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:13,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 18:03:13,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 8] total 20 [2024-06-27 18:03:13,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109367517] [2024-06-27 18:03:13,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:03:13,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:03:13,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:13,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:03:13,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2024-06-27 18:03:13,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:03:13,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 712 transitions, 16629 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 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 18:03:13,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:13,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:03:13,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:16,824 INFO L124 PetriNetUnfolderBase]: 7693/13740 cut-off events. [2024-06-27 18:03:16,824 INFO L125 PetriNetUnfolderBase]: For 176021/176021 co-relation queries the response was YES. [2024-06-27 18:03:16,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102065 conditions, 13740 events. 7693/13740 cut-off events. For 176021/176021 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 105451 event pairs, 2004 based on Foata normal form. 34/13774 useless extension candidates. Maximal degree in co-relation 101924. Up to 5916 conditions per place. [2024-06-27 18:03:16,970 INFO L140 encePairwiseOnDemand]: 24/33 looper letters, 446 selfloop transitions, 341 changer transitions 0/790 dead transitions. [2024-06-27 18:03:16,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 790 transitions, 18973 flow [2024-06-27 18:03:16,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:03:16,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:03:16,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 191 transitions. [2024-06-27 18:03:16,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5261707988980716 [2024-06-27 18:03:16,971 INFO L175 Difference]: Start difference. First operand has 358 places, 712 transitions, 16629 flow. Second operand 11 states and 191 transitions. [2024-06-27 18:03:16,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 790 transitions, 18973 flow [2024-06-27 18:03:18,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 790 transitions, 18668 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-27 18:03:18,533 INFO L231 Difference]: Finished difference. Result has 367 places, 725 transitions, 17734 flow [2024-06-27 18:03:18,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=16282, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=327, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=17734, PETRI_PLACES=367, PETRI_TRANSITIONS=725} [2024-06-27 18:03:18,534 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 336 predicate places. [2024-06-27 18:03:18,534 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 725 transitions, 17734 flow [2024-06-27 18:03:18,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 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 18:03:18,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:18,534 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:18,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-06-27 18:03:18,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-06-27 18:03:18,735 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:03:18,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:18,736 INFO L85 PathProgramCache]: Analyzing trace with hash 597071589, now seen corresponding path program 6 times [2024-06-27 18:03:18,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:18,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38361885] [2024-06-27 18:03:18,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:18,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:18,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:19,093 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:03:19,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:19,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38361885] [2024-06-27 18:03:19,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38361885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:03:19,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:03:19,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:03:19,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48011540] [2024-06-27 18:03:19,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:03:19,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:03:19,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:19,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:03:19,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:03:19,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:03:19,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 725 transitions, 17734 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 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 18:03:19,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:19,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:03:19,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:22,617 INFO L124 PetriNetUnfolderBase]: 7689/13745 cut-off events. [2024-06-27 18:03:22,617 INFO L125 PetriNetUnfolderBase]: For 192382/192382 co-relation queries the response was YES. [2024-06-27 18:03:22,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106500 conditions, 13745 events. 7689/13745 cut-off events. For 192382/192382 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 105615 event pairs, 3600 based on Foata normal form. 4/13749 useless extension candidates. Maximal degree in co-relation 106357. Up to 10861 conditions per place. [2024-06-27 18:03:22,763 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 592 selfloop transitions, 162 changer transitions 2/759 dead transitions. [2024-06-27 18:03:22,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 759 transitions, 19339 flow [2024-06-27 18:03:22,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 18:03:22,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 18:03:22,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 182 transitions. [2024-06-27 18:03:22,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-27 18:03:22,764 INFO L175 Difference]: Start difference. First operand has 367 places, 725 transitions, 17734 flow. Second operand 13 states and 182 transitions. [2024-06-27 18:03:22,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 759 transitions, 19339 flow [2024-06-27 18:03:24,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 759 transitions, 19186 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 18:03:24,373 INFO L231 Difference]: Finished difference. Result has 371 places, 723 transitions, 17849 flow [2024-06-27 18:03:24,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=17549, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=724, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=562, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=17849, PETRI_PLACES=371, PETRI_TRANSITIONS=723} [2024-06-27 18:03:24,374 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 340 predicate places. [2024-06-27 18:03:24,375 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 723 transitions, 17849 flow [2024-06-27 18:03:24,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 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 18:03:24,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:24,375 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:24,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 18:03:24,375 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:03:24,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:24,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1410204405, now seen corresponding path program 7 times [2024-06-27 18:03:24,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:24,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560867820] [2024-06-27 18:03:24,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:24,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:24,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:24,786 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:03:24,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:24,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560867820] [2024-06-27 18:03:24,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560867820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:03:24,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:03:24,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:03:24,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146461656] [2024-06-27 18:03:24,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:03:24,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:03:24,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:24,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:03:24,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:03:24,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:03:24,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 723 transitions, 17849 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 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 18:03:24,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:24,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:03:24,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:28,323 INFO L124 PetriNetUnfolderBase]: 7619/13591 cut-off events. [2024-06-27 18:03:28,324 INFO L125 PetriNetUnfolderBase]: For 195324/195324 co-relation queries the response was YES. [2024-06-27 18:03:28,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106348 conditions, 13591 events. 7619/13591 cut-off events. For 195324/195324 co-relation queries the response was YES. Maximal size of possible extension queue 587. Compared 104013 event pairs, 3530 based on Foata normal form. 4/13595 useless extension candidates. Maximal degree in co-relation 106207. Up to 10717 conditions per place. [2024-06-27 18:03:28,440 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 588 selfloop transitions, 160 changer transitions 4/755 dead transitions. [2024-06-27 18:03:28,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 755 transitions, 19403 flow [2024-06-27 18:03:28,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 18:03:28,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 18:03:28,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 187 transitions. [2024-06-27 18:03:28,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 18:03:28,442 INFO L175 Difference]: Start difference. First operand has 371 places, 723 transitions, 17849 flow. Second operand 14 states and 187 transitions. [2024-06-27 18:03:28,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 755 transitions, 19403 flow [2024-06-27 18:03:29,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 755 transitions, 19230 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-27 18:03:29,785 INFO L231 Difference]: Finished difference. Result has 372 places, 718 transitions, 17888 flow [2024-06-27 18:03:29,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=17601, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=17888, PETRI_PLACES=372, PETRI_TRANSITIONS=718} [2024-06-27 18:03:29,786 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 341 predicate places. [2024-06-27 18:03:29,786 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 718 transitions, 17888 flow [2024-06-27 18:03:29,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 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 18:03:29,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:29,787 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:29,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 18:03:29,787 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:03:29,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:29,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1615167298, now seen corresponding path program 4 times [2024-06-27 18:03:29,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:29,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621495616] [2024-06-27 18:03:29,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:29,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:29,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:30,243 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:03:30,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:30,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621495616] [2024-06-27 18:03:30,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621495616] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:30,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010890864] [2024-06-27 18:03:30,244 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 18:03:30,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:30,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:30,245 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:03:30,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-06-27 18:03:30,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 18:03:30,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:03:30,415 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2024-06-27 18:03:30,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:03:30,505 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:03:30,505 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:03:30,596 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-27 18:03:30,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-06-27 18:03:30,624 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:03:30,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010890864] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:03:30,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:03:30,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 18 [2024-06-27 18:03:30,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869454215] [2024-06-27 18:03:30,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:03:30,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-06-27 18:03:30,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:30,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-06-27 18:03:30,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2024-06-27 18:03:30,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:03:30,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 718 transitions, 17888 flow. Second operand has 18 states, 18 states have (on average 9.38888888888889) internal successors, (169), 18 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:30,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:30,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:03:30,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:03:34,070 INFO L124 PetriNetUnfolderBase]: 7644/13769 cut-off events. [2024-06-27 18:03:34,070 INFO L125 PetriNetUnfolderBase]: For 207228/207228 co-relation queries the response was YES. [2024-06-27 18:03:34,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106831 conditions, 13769 events. 7644/13769 cut-off events. For 207228/207228 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 106894 event pairs, 1371 based on Foata normal form. 52/13821 useless extension candidates. Maximal degree in co-relation 106690. Up to 4134 conditions per place. [2024-06-27 18:03:34,209 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 429 selfloop transitions, 384 changer transitions 0/816 dead transitions. [2024-06-27 18:03:34,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 816 transitions, 20463 flow [2024-06-27 18:03:34,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-27 18:03:34,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-27 18:03:34,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 245 transitions. [2024-06-27 18:03:34,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4640151515151515 [2024-06-27 18:03:34,210 INFO L175 Difference]: Start difference. First operand has 372 places, 718 transitions, 17888 flow. Second operand 16 states and 245 transitions. [2024-06-27 18:03:34,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 816 transitions, 20463 flow [2024-06-27 18:03:35,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 816 transitions, 20001 flow, removed 10 selfloop flow, removed 17 redundant places. [2024-06-27 18:03:35,762 INFO L231 Difference]: Finished difference. Result has 370 places, 750 transitions, 19043 flow [2024-06-27 18:03:35,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=17366, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=712, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=351, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=19043, PETRI_PLACES=370, PETRI_TRANSITIONS=750} [2024-06-27 18:03:35,763 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 339 predicate places. [2024-06-27 18:03:35,763 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 750 transitions, 19043 flow [2024-06-27 18:03:35,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.38888888888889) internal successors, (169), 18 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:35,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:03:35,763 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:03:35,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-06-27 18:03:35,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-06-27 18:03:35,973 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:03:35,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:03:35,974 INFO L85 PathProgramCache]: Analyzing trace with hash -352594315, now seen corresponding path program 8 times [2024-06-27 18:03:35,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:03:35,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816499045] [2024-06-27 18:03:35,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:03:35,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:03:35,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:03:36,240 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:03:36,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:03:36,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816499045] [2024-06-27 18:03:36,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816499045] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 18:03:36,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279386653] [2024-06-27 18:03:36,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 18:03:36,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 18:03:36,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:03:36,344 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 18:03:36,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-06-27 18:03:36,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 18:03:36,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 18:03:36,500 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 21 conjunts are in the unsatisfiable core [2024-06-27 18:03:36,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 18:03:36,585 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 18:03:36,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 70 [2024-06-27 18:03:36,610 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:03:36,610 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 18:03:36,694 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-27 18:03:36,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-06-27 18:03:36,716 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-27 18:03:36,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279386653] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 18:03:36,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 18:03:36,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 17 [2024-06-27 18:03:36,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977006275] [2024-06-27 18:03:36,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 18:03:36,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-06-27 18:03:36,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:03:36,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-06-27 18:03:36,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2024-06-27 18:03:36,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 18:03:36,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 750 transitions, 19043 flow. Second operand has 17 states, 17 states have (on average 9.411764705882353) internal successors, (160), 17 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:03:36,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:03:36,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 18:03:36,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand