./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/fib_unsafe-6.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-05-07_14-17-48.files/mutex-meet/fib_unsafe-6.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b44c8288 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread/fib_unsafe-6.i ./goblint.2024-05-07_14-17-48.files/mutex-meet/fib_unsafe-6.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-wip.fs.witness-ghost-b44c828-m [2024-05-12 11:08:31,340 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-05-12 11:08:31,398 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-05-12 11:08:31,402 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-05-12 11:08:31,402 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-05-12 11:08:31,421 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-05-12 11:08:31,421 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-05-12 11:08:31,422 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-05-12 11:08:31,422 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-05-12 11:08:31,423 INFO L153 SettingsManager]: * Use memory slicer=true [2024-05-12 11:08:31,423 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-05-12 11:08:31,423 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-05-12 11:08:31,424 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-05-12 11:08:31,424 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-05-12 11:08:31,425 INFO L153 SettingsManager]: * Use SBE=true [2024-05-12 11:08:31,425 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-05-12 11:08:31,425 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-05-12 11:08:31,426 INFO L153 SettingsManager]: * sizeof long=4 [2024-05-12 11:08:31,426 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-05-12 11:08:31,426 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-05-12 11:08:31,427 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-05-12 11:08:31,427 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-05-12 11:08:31,428 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-05-12 11:08:31,428 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-05-12 11:08:31,428 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-05-12 11:08:31,429 INFO L153 SettingsManager]: * sizeof long double=12 [2024-05-12 11:08:31,429 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-05-12 11:08:31,429 INFO L153 SettingsManager]: * Use constant arrays=true [2024-05-12 11:08:31,430 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-05-12 11:08:31,430 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-05-12 11:08:31,430 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-05-12 11:08:31,431 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-05-12 11:08:31,431 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 11:08:31,432 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-05-12 11:08:31,432 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-05-12 11:08:31,432 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-05-12 11:08:31,433 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-05-12 11:08:31,433 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-05-12 11:08:31,433 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-05-12 11:08:31,434 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-05-12 11:08:31,434 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-05-12 11:08:31,434 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-05-12 11:08:31,435 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-05-12 11:08:31,435 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-05-12 11:08:31,706 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-05-12 11:08:31,730 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-05-12 11:08:31,733 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-05-12 11:08:31,734 INFO L270 PluginConnector]: Initializing CDTParser... [2024-05-12 11:08:31,734 INFO L274 PluginConnector]: CDTParser initialized [2024-05-12 11:08:31,735 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_unsafe-6.i [2024-05-12 11:08:32,869 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-05-12 11:08:33,124 INFO L384 CDTParser]: Found 1 translation units. [2024-05-12 11:08:33,125 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-6.i [2024-05-12 11:08:33,137 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/378cd4a8d/e44d35330bfc4354bace7d0c46e82549/FLAGc08a8210f [2024-05-12 11:08:33,152 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/378cd4a8d/e44d35330bfc4354bace7d0c46e82549 [2024-05-12 11:08:33,154 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-05-12 11:08:33,154 INFO L274 PluginConnector]: Witness Parser initialized [2024-05-12 11:08:33,155 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-07_14-17-48.files/mutex-meet/fib_unsafe-6.yml/witness.yml [2024-05-12 11:08:33,283 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-05-12 11:08:33,284 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-05-12 11:08:33,285 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-05-12 11:08:33,285 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-05-12 11:08:33,290 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-05-12 11:08:33,290 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 11:08:33" (1/2) ... [2024-05-12 11:08:33,291 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2621ca5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 11:08:33, skipping insertion in model container [2024-05-12 11:08:33,292 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 11:08:33" (1/2) ... [2024-05-12 11:08:33,293 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5a6f9023 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 11:08:33, skipping insertion in model container [2024-05-12 11:08:33,293 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 11:08:33" (2/2) ... [2024-05-12 11:08:33,294 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2621ca5d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 11:08:33, skipping insertion in model container [2024-05-12 11:08:33,294 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 11:08:33" (2/2) ... [2024-05-12 11:08:33,294 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-05-12 11:08:33,339 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-05-12 11:08:33,340 INFO L97 edCorrectnessWitness]: Location invariant before [L722-L722] ((((((((! multithreaded || 0 <= cur) && (! multithreaded || 0 <= next)) && (! multithreaded || ((0 <= i && 1 <= i) && i != 0))) && (! multithreaded || 0 <= p)) && (! multithreaded || 0 <= q)) && (! multithreaded || ((((0 <= i && 0 <= j) && 1 <= j) && i != 0) && j != 0))) && (! multithreaded || 0 <= x)) && (! multithreaded || 0 <= prev)) && (! multithreaded || ((0 <= j && 1 <= j) && j != 0)) [2024-05-12 11:08:33,340 INFO L97 edCorrectnessWitness]: Location invariant before [L721-L721] ((((((((! multithreaded || 0 <= cur) && (! multithreaded || 0 <= next)) && (! multithreaded || ((0 <= i && 1 <= i) && i != 0))) && (! multithreaded || 0 <= p)) && (! multithreaded || 0 <= q)) && (! multithreaded || ((((0 <= i && 0 <= j) && 1 <= j) && i != 0) && j != 0))) && (! multithreaded || 0 <= x)) && (! multithreaded || 0 <= prev)) && (! multithreaded || ((0 <= j && 1 <= j) && j != 0)) [2024-05-12 11:08:33,340 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-05-12 11:08:33,341 INFO L106 edCorrectnessWitness]: ghost_update [L720-L720] multithreaded = 1; [2024-05-12 11:08:33,383 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-05-12 11:08:33,676 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-6.i[30243,30256] [2024-05-12 11:08:33,696 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 11:08:33,712 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-05-12 11:08:33,804 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-6.i[30243,30256] Start Parsing Local Start Parsing Local Start Parsing Local [2024-05-12 11:08:33,831 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 11:08:33,881 INFO L206 MainTranslator]: Completed translation [2024-05-12 11:08:33,882 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 11:08:33 WrapperNode [2024-05-12 11:08:33,882 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-05-12 11:08:33,884 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-05-12 11:08:33,884 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-05-12 11:08:33,884 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-05-12 11:08:33,891 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 11:08:33" (1/1) ... [2024-05-12 11:08:33,921 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 11:08:33" (1/1) ... [2024-05-12 11:08:33,955 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2024-05-12 11:08:33,956 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-05-12 11:08:33,957 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-05-12 11:08:33,957 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-05-12 11:08:33,958 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-05-12 11:08:33,967 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 11:08:33" (1/1) ... [2024-05-12 11:08:33,967 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 11:08:33" (1/1) ... [2024-05-12 11:08:33,973 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 11:08:33" (1/1) ... [2024-05-12 11:08:34,001 INFO L175 MemorySlicer]: Split 4 memory accesses to 3 slices as follows [2, 1, 1]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-05-12 11:08:34,002 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 11:08:33" (1/1) ... [2024-05-12 11:08:34,002 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 11:08:33" (1/1) ... [2024-05-12 11:08:34,014 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 11:08:33" (1/1) ... [2024-05-12 11:08:34,018 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 11:08:33" (1/1) ... [2024-05-12 11:08:34,022 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 11:08:33" (1/1) ... [2024-05-12 11:08:34,027 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 11:08:33" (1/1) ... [2024-05-12 11:08:34,029 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-05-12 11:08:34,032 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-05-12 11:08:34,033 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-05-12 11:08:34,033 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-05-12 11:08:34,034 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 11:08:33" (1/1) ... [2024-05-12 11:08:34,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 11:08:34,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:08:34,065 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) [2024-05-12 11:08:34,089 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 [2024-05-12 11:08:34,106 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-05-12 11:08:34,106 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-05-12 11:08:34,107 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-05-12 11:08:34,107 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-05-12 11:08:34,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-05-12 11:08:34,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-05-12 11:08:34,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-05-12 11:08:34,108 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-05-12 11:08:34,108 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-05-12 11:08:34,108 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-05-12 11:08:34,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-05-12 11:08:34,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-05-12 11:08:34,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-05-12 11:08:34,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-05-12 11:08:34,110 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-05-12 11:08:34,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-05-12 11:08:34,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-05-12 11:08:34,112 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-05-12 11:08:34,262 INFO L244 CfgBuilder]: Building ICFG [2024-05-12 11:08:34,264 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-05-12 11:08:34,426 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-05-12 11:08:34,427 INFO L293 CfgBuilder]: Performing block encoding [2024-05-12 11:08:34,530 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-05-12 11:08:34,530 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-05-12 11:08:34,531 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 11:08:34 BoogieIcfgContainer [2024-05-12 11:08:34,531 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-05-12 11:08:34,533 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-05-12 11:08:34,533 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-05-12 11:08:34,536 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-05-12 11:08:34,536 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.05 11:08:33" (1/4) ... [2024-05-12 11:08:34,537 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@528d3201 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 11:08:34, skipping insertion in model container [2024-05-12 11:08:34,537 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 11:08:33" (2/4) ... [2024-05-12 11:08:34,537 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@528d3201 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 11:08:34, skipping insertion in model container [2024-05-12 11:08:34,537 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 11:08:33" (3/4) ... [2024-05-12 11:08:34,538 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@528d3201 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 11:08:34, skipping insertion in model container [2024-05-12 11:08:34,538 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 11:08:34" (4/4) ... [2024-05-12 11:08:34,539 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_unsafe-6.i [2024-05-12 11:08:34,555 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-05-12 11:08:34,556 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-05-12 11:08:34,556 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-05-12 11:08:34,588 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-05-12 11:08:34,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 34 transitions, 76 flow [2024-05-12 11:08:34,699 INFO L124 PetriNetUnfolderBase]: 4/32 cut-off events. [2024-05-12 11:08:34,699 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 11:08:34,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 32 events. 4/32 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 33 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 28. Up to 2 conditions per place. [2024-05-12 11:08:34,702 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 34 transitions, 76 flow [2024-05-12 11:08:34,705 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 32 transitions, 70 flow [2024-05-12 11:08:34,720 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-05-12 11:08:34,726 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;@1cdb3998, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-05-12 11:08:34,726 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-05-12 11:08:34,730 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-05-12 11:08:34,730 INFO L124 PetriNetUnfolderBase]: 0/10 cut-off events. [2024-05-12 11:08:34,730 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 11:08:34,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:08:34,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:08:34,731 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)] === [2024-05-12 11:08:34,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:08:34,735 INFO L85 PathProgramCache]: Analyzing trace with hash -796992463, now seen corresponding path program 1 times [2024-05-12 11:08:34,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:08:34,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555949711] [2024-05-12 11:08:34,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:08:34,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:08:34,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:08:35,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:08:35,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:08:35,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555949711] [2024-05-12 11:08:35,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555949711] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:08:35,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:08:35,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 11:08:35,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822358579] [2024-05-12 11:08:35,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:08:35,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 11:08:35,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:08:35,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 11:08:35,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 11:08:35,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:08:35,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 70 flow. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 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) [2024-05-12 11:08:35,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:08:35,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:08:35,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:08:35,769 INFO L124 PetriNetUnfolderBase]: 354/619 cut-off events. [2024-05-12 11:08:35,769 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-05-12 11:08:35,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1183 conditions, 619 events. 354/619 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2654 event pairs, 51 based on Foata normal form. 33/585 useless extension candidates. Maximal degree in co-relation 1165. Up to 343 conditions per place. [2024-05-12 11:08:35,780 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 42 selfloop transitions, 11 changer transitions 1/60 dead transitions. [2024-05-12 11:08:35,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 60 transitions, 237 flow [2024-05-12 11:08:35,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 11:08:35,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 11:08:35,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 102 transitions. [2024-05-12 11:08:35,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-05-12 11:08:35,793 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 70 flow. Second operand 5 states and 102 transitions. [2024-05-12 11:08:35,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 60 transitions, 237 flow [2024-05-12 11:08:35,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 60 transitions, 234 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-05-12 11:08:35,801 INFO L231 Difference]: Finished difference. Result has 40 places, 38 transitions, 142 flow [2024-05-12 11:08:35,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=142, PETRI_PLACES=40, PETRI_TRANSITIONS=38} [2024-05-12 11:08:35,807 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 5 predicate places. [2024-05-12 11:08:35,807 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 38 transitions, 142 flow [2024-05-12 11:08:35,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 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) [2024-05-12 11:08:35,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:08:35,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:08:35,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-05-12 11:08:35,808 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)] === [2024-05-12 11:08:35,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:08:35,809 INFO L85 PathProgramCache]: Analyzing trace with hash -607407073, now seen corresponding path program 1 times [2024-05-12 11:08:35,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:08:35,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324787527] [2024-05-12 11:08:35,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:08:35,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:08:35,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:08:36,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:08:36,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:08:36,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324787527] [2024-05-12 11:08:36,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324787527] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:08:36,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:08:36,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 11:08:36,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916194409] [2024-05-12 11:08:36,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:08:36,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 11:08:36,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:08:36,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 11:08:36,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 11:08:36,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:08:36,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 38 transitions, 142 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:36,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:08:36,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:08:36,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:08:36,426 INFO L124 PetriNetUnfolderBase]: 322/569 cut-off events. [2024-05-12 11:08:36,427 INFO L125 PetriNetUnfolderBase]: For 236/236 co-relation queries the response was YES. [2024-05-12 11:08:36,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1490 conditions, 569 events. 322/569 cut-off events. For 236/236 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2457 event pairs, 30 based on Foata normal form. 12/565 useless extension candidates. Maximal degree in co-relation 1465. Up to 295 conditions per place. [2024-05-12 11:08:36,431 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 52 selfloop transitions, 17 changer transitions 0/75 dead transitions. [2024-05-12 11:08:36,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 75 transitions, 382 flow [2024-05-12 11:08:36,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 11:08:36,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 11:08:36,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-05-12 11:08:36,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5378151260504201 [2024-05-12 11:08:36,440 INFO L175 Difference]: Start difference. First operand has 40 places, 38 transitions, 142 flow. Second operand 7 states and 128 transitions. [2024-05-12 11:08:36,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 75 transitions, 382 flow [2024-05-12 11:08:36,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 75 transitions, 382 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-05-12 11:08:36,447 INFO L231 Difference]: Finished difference. Result has 48 places, 44 transitions, 224 flow [2024-05-12 11:08:36,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=224, PETRI_PLACES=48, PETRI_TRANSITIONS=44} [2024-05-12 11:08:36,450 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 13 predicate places. [2024-05-12 11:08:36,451 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 44 transitions, 224 flow [2024-05-12 11:08:36,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:36,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:08:36,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:08:36,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-05-12 11:08:36,457 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)] === [2024-05-12 11:08:36,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:08:36,458 INFO L85 PathProgramCache]: Analyzing trace with hash -2120745009, now seen corresponding path program 1 times [2024-05-12 11:08:36,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:08:36,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311955667] [2024-05-12 11:08:36,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:08:36,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:08:36,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:08:36,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:08:36,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:08:36,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311955667] [2024-05-12 11:08:36,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311955667] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:08:36,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:08:36,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 11:08:36,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810375971] [2024-05-12 11:08:36,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:08:36,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 11:08:36,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:08:36,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 11:08:36,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-05-12 11:08:36,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:08:36,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 44 transitions, 224 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:36,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:08:36,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:08:36,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:08:37,037 INFO L124 PetriNetUnfolderBase]: 307/544 cut-off events. [2024-05-12 11:08:37,038 INFO L125 PetriNetUnfolderBase]: For 512/515 co-relation queries the response was YES. [2024-05-12 11:08:37,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1702 conditions, 544 events. 307/544 cut-off events. For 512/515 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2313 event pairs, 20 based on Foata normal form. 11/539 useless extension candidates. Maximal degree in co-relation 1670. Up to 295 conditions per place. [2024-05-12 11:08:37,042 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 55 selfloop transitions, 19 changer transitions 0/80 dead transitions. [2024-05-12 11:08:37,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 80 transitions, 483 flow [2024-05-12 11:08:37,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 11:08:37,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 11:08:37,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-05-12 11:08:37,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5147058823529411 [2024-05-12 11:08:37,047 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 224 flow. Second operand 8 states and 140 transitions. [2024-05-12 11:08:37,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 80 transitions, 483 flow [2024-05-12 11:08:37,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 80 transitions, 451 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-05-12 11:08:37,056 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 244 flow [2024-05-12 11:08:37,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=244, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-05-12 11:08:37,058 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 16 predicate places. [2024-05-12 11:08:37,058 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 244 flow [2024-05-12 11:08:37,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:37,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:08:37,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:08:37,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-05-12 11:08:37,059 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:08:37,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:08:37,060 INFO L85 PathProgramCache]: Analyzing trace with hash -586531568, now seen corresponding path program 1 times [2024-05-12 11:08:37,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:08:37,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852543307] [2024-05-12 11:08:37,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:08:37,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:08:37,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:08:37,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:08:37,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:08:37,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852543307] [2024-05-12 11:08:37,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852543307] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:08:37,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:08:37,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 11:08:37,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837304345] [2024-05-12 11:08:37,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:08:37,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 11:08:37,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:08:37,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 11:08:37,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-05-12 11:08:37,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:08:37,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 244 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:37,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:08:37,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:08:37,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:08:37,561 INFO L124 PetriNetUnfolderBase]: 373/652 cut-off events. [2024-05-12 11:08:37,561 INFO L125 PetriNetUnfolderBase]: For 835/835 co-relation queries the response was YES. [2024-05-12 11:08:37,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2130 conditions, 652 events. 373/652 cut-off events. For 835/835 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2866 event pairs, 62 based on Foata normal form. 21/658 useless extension candidates. Maximal degree in co-relation 2097. Up to 245 conditions per place. [2024-05-12 11:08:37,566 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 52 selfloop transitions, 21 changer transitions 0/79 dead transitions. [2024-05-12 11:08:37,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 79 transitions, 540 flow [2024-05-12 11:08:37,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 11:08:37,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 11:08:37,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-05-12 11:08:37,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5126050420168067 [2024-05-12 11:08:37,569 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 244 flow. Second operand 7 states and 122 transitions. [2024-05-12 11:08:37,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 79 transitions, 540 flow [2024-05-12 11:08:37,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 79 transitions, 496 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-05-12 11:08:37,574 INFO L231 Difference]: Finished difference. Result has 55 places, 52 transitions, 323 flow [2024-05-12 11:08:37,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=323, PETRI_PLACES=55, PETRI_TRANSITIONS=52} [2024-05-12 11:08:37,576 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 20 predicate places. [2024-05-12 11:08:37,576 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 52 transitions, 323 flow [2024-05-12 11:08:37,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:37,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:08:37,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:08:37,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-05-12 11:08:37,577 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)] === [2024-05-12 11:08:37,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:08:37,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1584426839, now seen corresponding path program 1 times [2024-05-12 11:08:37,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:08:37,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339139740] [2024-05-12 11:08:37,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:08:37,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:08:37,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:08:37,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:08:37,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:08:37,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339139740] [2024-05-12 11:08:37,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339139740] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:08:37,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:08:37,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 11:08:37,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423838237] [2024-05-12 11:08:37,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:08:37,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 11:08:37,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:08:37,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 11:08:37,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 11:08:37,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:08:37,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 323 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:37,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:08:37,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:08:37,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:08:38,095 INFO L124 PetriNetUnfolderBase]: 355/621 cut-off events. [2024-05-12 11:08:38,095 INFO L125 PetriNetUnfolderBase]: For 1110/1110 co-relation queries the response was YES. [2024-05-12 11:08:38,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2209 conditions, 621 events. 355/621 cut-off events. For 1110/1110 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2697 event pairs, 58 based on Foata normal form. 9/615 useless extension candidates. Maximal degree in co-relation 2170. Up to 242 conditions per place. [2024-05-12 11:08:38,101 INFO L140 encePairwiseOnDemand]: 25/34 looper letters, 51 selfloop transitions, 21 changer transitions 0/78 dead transitions. [2024-05-12 11:08:38,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 78 transitions, 569 flow [2024-05-12 11:08:38,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 11:08:38,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 11:08:38,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-05-12 11:08:38,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46691176470588236 [2024-05-12 11:08:38,102 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 323 flow. Second operand 8 states and 127 transitions. [2024-05-12 11:08:38,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 78 transitions, 569 flow [2024-05-12 11:08:38,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 78 transitions, 562 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 11:08:38,108 INFO L231 Difference]: Finished difference. Result has 62 places, 52 transitions, 363 flow [2024-05-12 11:08:38,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=363, PETRI_PLACES=62, PETRI_TRANSITIONS=52} [2024-05-12 11:08:38,108 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 27 predicate places. [2024-05-12 11:08:38,109 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 52 transitions, 363 flow [2024-05-12 11:08:38,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:38,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:08:38,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:08:38,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-05-12 11:08:38,110 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)] === [2024-05-12 11:08:38,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:08:38,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1016755256, now seen corresponding path program 1 times [2024-05-12 11:08:38,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:08:38,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153109199] [2024-05-12 11:08:38,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:08:38,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:08:38,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:08:38,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:08:38,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:08:38,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153109199] [2024-05-12 11:08:38,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153109199] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:08:38,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:08:38,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 11:08:38,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243334935] [2024-05-12 11:08:38,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:08:38,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 11:08:38,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:08:38,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 11:08:38,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-05-12 11:08:38,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:08:38,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 52 transitions, 363 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:38,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:08:38,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:08:38,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:08:38,644 INFO L124 PetriNetUnfolderBase]: 367/640 cut-off events. [2024-05-12 11:08:38,645 INFO L125 PetriNetUnfolderBase]: For 1371/1376 co-relation queries the response was YES. [2024-05-12 11:08:38,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2384 conditions, 640 events. 367/640 cut-off events. For 1371/1376 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2777 event pairs, 60 based on Foata normal form. 5/630 useless extension candidates. Maximal degree in co-relation 2341. Up to 232 conditions per place. [2024-05-12 11:08:38,650 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 58 selfloop transitions, 29 changer transitions 0/93 dead transitions. [2024-05-12 11:08:38,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 93 transitions, 701 flow [2024-05-12 11:08:38,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 11:08:38,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 11:08:38,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-05-12 11:08:38,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49019607843137253 [2024-05-12 11:08:38,652 INFO L175 Difference]: Start difference. First operand has 62 places, 52 transitions, 363 flow. Second operand 9 states and 150 transitions. [2024-05-12 11:08:38,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 93 transitions, 701 flow [2024-05-12 11:08:38,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 93 transitions, 649 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-05-12 11:08:38,658 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 434 flow [2024-05-12 11:08:38,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=434, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2024-05-12 11:08:38,659 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 30 predicate places. [2024-05-12 11:08:38,659 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 434 flow [2024-05-12 11:08:38,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:38,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:08:38,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:08:38,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-05-12 11:08:38,660 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)] === [2024-05-12 11:08:38,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:08:38,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1905564268, now seen corresponding path program 2 times [2024-05-12 11:08:38,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:08:38,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226849716] [2024-05-12 11:08:38,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:08:38,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:08:38,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:08:38,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:08:38,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:08:38,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226849716] [2024-05-12 11:08:38,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226849716] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:08:38,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:08:38,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 11:08:38,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764073611] [2024-05-12 11:08:38,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:08:38,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 11:08:38,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:08:38,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 11:08:38,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-05-12 11:08:39,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:08:39,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 434 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:39,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:08:39,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:08:39,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:08:39,186 INFO L124 PetriNetUnfolderBase]: 385/670 cut-off events. [2024-05-12 11:08:39,186 INFO L125 PetriNetUnfolderBase]: For 1626/1626 co-relation queries the response was YES. [2024-05-12 11:08:39,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2644 conditions, 670 events. 385/670 cut-off events. For 1626/1626 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2942 event pairs, 61 based on Foata normal form. 4/659 useless extension candidates. Maximal degree in co-relation 2600. Up to 267 conditions per place. [2024-05-12 11:08:39,193 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 58 selfloop transitions, 32 changer transitions 0/96 dead transitions. [2024-05-12 11:08:39,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 96 transitions, 809 flow [2024-05-12 11:08:39,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 11:08:39,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 11:08:39,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-05-12 11:08:39,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2024-05-12 11:08:39,195 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 434 flow. Second operand 9 states and 144 transitions. [2024-05-12 11:08:39,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 96 transitions, 809 flow [2024-05-12 11:08:39,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 96 transitions, 738 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-05-12 11:08:39,202 INFO L231 Difference]: Finished difference. Result has 70 places, 69 transitions, 549 flow [2024-05-12 11:08:39,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=549, PETRI_PLACES=70, PETRI_TRANSITIONS=69} [2024-05-12 11:08:39,203 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 35 predicate places. [2024-05-12 11:08:39,203 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 69 transitions, 549 flow [2024-05-12 11:08:39,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:39,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:08:39,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:08:39,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-05-12 11:08:39,204 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:08:39,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:08:39,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1133920376, now seen corresponding path program 3 times [2024-05-12 11:08:39,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:08:39,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122947968] [2024-05-12 11:08:39,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:08:39,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:08:39,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:08:39,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:08:39,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:08:39,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122947968] [2024-05-12 11:08:39,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122947968] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:08:39,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:08:39,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 11:08:39,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362641577] [2024-05-12 11:08:39,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:08:39,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 11:08:39,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:08:39,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 11:08:39,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-05-12 11:08:39,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:08:39,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 69 transitions, 549 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:39,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:08:39,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:08:39,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:08:39,709 INFO L124 PetriNetUnfolderBase]: 397/688 cut-off events. [2024-05-12 11:08:39,709 INFO L125 PetriNetUnfolderBase]: For 1934/1944 co-relation queries the response was YES. [2024-05-12 11:08:39,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2884 conditions, 688 events. 397/688 cut-off events. For 1934/1944 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3020 event pairs, 60 based on Foata normal form. 9/682 useless extension candidates. Maximal degree in co-relation 2837. Up to 278 conditions per place. [2024-05-12 11:08:39,715 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 64 selfloop transitions, 36 changer transitions 0/106 dead transitions. [2024-05-12 11:08:39,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 106 transitions, 924 flow [2024-05-12 11:08:39,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 11:08:39,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 11:08:39,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-05-12 11:08:39,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.477124183006536 [2024-05-12 11:08:39,717 INFO L175 Difference]: Start difference. First operand has 70 places, 69 transitions, 549 flow. Second operand 9 states and 146 transitions. [2024-05-12 11:08:39,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 106 transitions, 924 flow [2024-05-12 11:08:39,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 106 transitions, 884 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-05-12 11:08:39,725 INFO L231 Difference]: Finished difference. Result has 78 places, 76 transitions, 670 flow [2024-05-12 11:08:39,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=513, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=670, PETRI_PLACES=78, PETRI_TRANSITIONS=76} [2024-05-12 11:08:39,726 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 43 predicate places. [2024-05-12 11:08:39,726 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 76 transitions, 670 flow [2024-05-12 11:08:39,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:39,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:08:39,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:08:39,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-05-12 11:08:39,727 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:08:39,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:08:39,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1906158914, now seen corresponding path program 4 times [2024-05-12 11:08:39,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:08:39,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137317631] [2024-05-12 11:08:39,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:08:39,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:08:39,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:08:39,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:08:39,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:08:39,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137317631] [2024-05-12 11:08:39,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137317631] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:08:39,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:08:39,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 11:08:39,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045414008] [2024-05-12 11:08:39,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:08:39,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 11:08:39,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:08:39,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 11:08:39,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-05-12 11:08:40,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:08:40,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 76 transitions, 670 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:40,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:08:40,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:08:40,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:08:40,266 INFO L124 PetriNetUnfolderBase]: 409/709 cut-off events. [2024-05-12 11:08:40,266 INFO L125 PetriNetUnfolderBase]: For 2414/2414 co-relation queries the response was YES. [2024-05-12 11:08:40,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3150 conditions, 709 events. 409/709 cut-off events. For 2414/2414 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3147 event pairs, 57 based on Foata normal form. 4/698 useless extension candidates. Maximal degree in co-relation 3098. Up to 294 conditions per place. [2024-05-12 11:08:40,276 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 68 selfloop transitions, 38 changer transitions 0/112 dead transitions. [2024-05-12 11:08:40,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 112 transitions, 1064 flow [2024-05-12 11:08:40,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 11:08:40,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 11:08:40,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-05-12 11:08:40,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4803921568627451 [2024-05-12 11:08:40,278 INFO L175 Difference]: Start difference. First operand has 78 places, 76 transitions, 670 flow. Second operand 9 states and 147 transitions. [2024-05-12 11:08:40,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 112 transitions, 1064 flow [2024-05-12 11:08:40,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 112 transitions, 1005 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-05-12 11:08:40,291 INFO L231 Difference]: Finished difference. Result has 84 places, 82 transitions, 771 flow [2024-05-12 11:08:40,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=615, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=771, PETRI_PLACES=84, PETRI_TRANSITIONS=82} [2024-05-12 11:08:40,292 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 49 predicate places. [2024-05-12 11:08:40,292 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 82 transitions, 771 flow [2024-05-12 11:08:40,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:40,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:08:40,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:08:40,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-05-12 11:08:40,294 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:08:40,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:08:40,295 INFO L85 PathProgramCache]: Analyzing trace with hash 2071591588, now seen corresponding path program 5 times [2024-05-12 11:08:40,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:08:40,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608915714] [2024-05-12 11:08:40,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:08:40,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:08:40,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:08:40,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:08:40,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:08:40,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608915714] [2024-05-12 11:08:40,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608915714] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:08:40,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:08:40,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 11:08:40,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571571612] [2024-05-12 11:08:40,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:08:40,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 11:08:40,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:08:40,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 11:08:40,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-05-12 11:08:40,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:08:40,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 82 transitions, 771 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:40,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:08:40,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:08:40,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:08:40,827 INFO L124 PetriNetUnfolderBase]: 415/714 cut-off events. [2024-05-12 11:08:40,827 INFO L125 PetriNetUnfolderBase]: For 2955/2955 co-relation queries the response was YES. [2024-05-12 11:08:40,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3365 conditions, 714 events. 415/714 cut-off events. For 2955/2955 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3159 event pairs, 60 based on Foata normal form. 1/700 useless extension candidates. Maximal degree in co-relation 3310. Up to 297 conditions per place. [2024-05-12 11:08:40,834 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 67 selfloop transitions, 41 changer transitions 0/114 dead transitions. [2024-05-12 11:08:40,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 114 transitions, 1161 flow [2024-05-12 11:08:40,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 11:08:40,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 11:08:40,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-05-12 11:08:40,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4673202614379085 [2024-05-12 11:08:40,836 INFO L175 Difference]: Start difference. First operand has 84 places, 82 transitions, 771 flow. Second operand 9 states and 143 transitions. [2024-05-12 11:08:40,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 114 transitions, 1161 flow [2024-05-12 11:08:40,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 114 transitions, 1105 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-05-12 11:08:40,851 INFO L231 Difference]: Finished difference. Result has 90 places, 87 transitions, 873 flow [2024-05-12 11:08:40,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=717, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=873, PETRI_PLACES=90, PETRI_TRANSITIONS=87} [2024-05-12 11:08:40,853 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 55 predicate places. [2024-05-12 11:08:40,853 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 87 transitions, 873 flow [2024-05-12 11:08:40,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:40,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:08:40,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:08:40,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-05-12 11:08:40,853 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:08:40,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:08:40,854 INFO L85 PathProgramCache]: Analyzing trace with hash 2078947888, now seen corresponding path program 6 times [2024-05-12 11:08:40,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:08:40,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266170598] [2024-05-12 11:08:40,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:08:40,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:08:40,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:08:41,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:08:41,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:08:41,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266170598] [2024-05-12 11:08:41,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266170598] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:08:41,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:08:41,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 11:08:41,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077777470] [2024-05-12 11:08:41,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:08:41,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 11:08:41,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:08:41,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 11:08:41,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-05-12 11:08:41,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:08:41,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 87 transitions, 873 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:41,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:08:41,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:08:41,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:08:41,380 INFO L124 PetriNetUnfolderBase]: 415/714 cut-off events. [2024-05-12 11:08:41,381 INFO L125 PetriNetUnfolderBase]: For 3553/3559 co-relation queries the response was YES. [2024-05-12 11:08:41,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3486 conditions, 714 events. 415/714 cut-off events. For 3553/3559 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3139 event pairs, 64 based on Foata normal form. 4/703 useless extension candidates. Maximal degree in co-relation 3427. Up to 310 conditions per place. [2024-05-12 11:08:41,388 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 69 selfloop transitions, 45 changer transitions 0/120 dead transitions. [2024-05-12 11:08:41,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 120 transitions, 1287 flow [2024-05-12 11:08:41,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 11:08:41,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 11:08:41,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-05-12 11:08:41,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738562091503268 [2024-05-12 11:08:41,389 INFO L175 Difference]: Start difference. First operand has 90 places, 87 transitions, 873 flow. Second operand 9 states and 145 transitions. [2024-05-12 11:08:41,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 120 transitions, 1287 flow [2024-05-12 11:08:41,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 120 transitions, 1209 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-05-12 11:08:41,402 INFO L231 Difference]: Finished difference. Result has 96 places, 93 transitions, 985 flow [2024-05-12 11:08:41,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=798, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=985, PETRI_PLACES=96, PETRI_TRANSITIONS=93} [2024-05-12 11:08:41,403 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 61 predicate places. [2024-05-12 11:08:41,403 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 93 transitions, 985 flow [2024-05-12 11:08:41,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:41,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:08:41,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:08:41,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-05-12 11:08:41,404 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)] === [2024-05-12 11:08:41,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:08:41,404 INFO L85 PathProgramCache]: Analyzing trace with hash -2052824783, now seen corresponding path program 1 times [2024-05-12 11:08:41,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:08:41,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148351389] [2024-05-12 11:08:41,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:08:41,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:08:41,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:08:41,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:08:41,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:08:41,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148351389] [2024-05-12 11:08:41,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148351389] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:08:41,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460653612] [2024-05-12 11:08:41,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:08:41,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:08:41,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:08:41,469 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) [2024-05-12 11:08:41,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-05-12 11:08:41,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:08:41,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 3 conjunts are in the unsatisfiable core [2024-05-12 11:08:41,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:08:41,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:08:41,596 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:08:41,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:08:41,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460653612] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:08:41,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:08:41,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-05-12 11:08:41,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139614001] [2024-05-12 11:08:41,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:08:41,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 11:08:41,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:08:41,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 11:08:41,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 11:08:41,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-05-12 11:08:41,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 93 transitions, 985 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:41,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:08:41,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-05-12 11:08:41,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:08:41,755 INFO L124 PetriNetUnfolderBase]: 396/727 cut-off events. [2024-05-12 11:08:41,755 INFO L125 PetriNetUnfolderBase]: For 4961/5038 co-relation queries the response was YES. [2024-05-12 11:08:41,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3596 conditions, 727 events. 396/727 cut-off events. For 4961/5038 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3278 event pairs, 80 based on Foata normal form. 61/736 useless extension candidates. Maximal degree in co-relation 3535. Up to 259 conditions per place. [2024-05-12 11:08:41,764 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 68 selfloop transitions, 27 changer transitions 0/120 dead transitions. [2024-05-12 11:08:41,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 120 transitions, 1385 flow [2024-05-12 11:08:41,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 11:08:41,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 11:08:41,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-05-12 11:08:41,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6519607843137255 [2024-05-12 11:08:41,765 INFO L175 Difference]: Start difference. First operand has 96 places, 93 transitions, 985 flow. Second operand 6 states and 133 transitions. [2024-05-12 11:08:41,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 120 transitions, 1385 flow [2024-05-12 11:08:41,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 120 transitions, 1295 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-05-12 11:08:41,778 INFO L231 Difference]: Finished difference. Result has 99 places, 96 transitions, 1003 flow [2024-05-12 11:08:41,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=895, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1003, PETRI_PLACES=99, PETRI_TRANSITIONS=96} [2024-05-12 11:08:41,779 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 64 predicate places. [2024-05-12 11:08:41,779 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 96 transitions, 1003 flow [2024-05-12 11:08:41,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:41,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:08:41,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:08:41,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-05-12 11:08:42,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-05-12 11:08:42,004 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:08:42,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:08:42,005 INFO L85 PathProgramCache]: Analyzing trace with hash -981032600, now seen corresponding path program 1 times [2024-05-12 11:08:42,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:08:42,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542612849] [2024-05-12 11:08:42,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:08:42,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:08:42,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:08:42,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:08:42,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:08:42,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542612849] [2024-05-12 11:08:42,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542612849] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:08:42,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:08:42,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 11:08:42,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19677126] [2024-05-12 11:08:42,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:08:42,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 11:08:42,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:08:42,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 11:08:42,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-05-12 11:08:42,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:08:42,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 96 transitions, 1003 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:42,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:08:42,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:08:42,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:08:42,688 INFO L124 PetriNetUnfolderBase]: 547/951 cut-off events. [2024-05-12 11:08:42,688 INFO L125 PetriNetUnfolderBase]: For 6044/6049 co-relation queries the response was YES. [2024-05-12 11:08:42,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4805 conditions, 951 events. 547/951 cut-off events. For 6044/6049 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4359 event pairs, 60 based on Foata normal form. 7/941 useless extension candidates. Maximal degree in co-relation 4740. Up to 341 conditions per place. [2024-05-12 11:08:42,699 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 87 selfloop transitions, 51 changer transitions 0/144 dead transitions. [2024-05-12 11:08:42,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 144 transitions, 1584 flow [2024-05-12 11:08:42,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 11:08:42,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 11:08:42,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-05-12 11:08:42,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4970588235294118 [2024-05-12 11:08:42,702 INFO L175 Difference]: Start difference. First operand has 99 places, 96 transitions, 1003 flow. Second operand 10 states and 169 transitions. [2024-05-12 11:08:42,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 144 transitions, 1584 flow [2024-05-12 11:08:42,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 144 transitions, 1518 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-05-12 11:08:42,727 INFO L231 Difference]: Finished difference. Result has 108 places, 101 transitions, 1120 flow [2024-05-12 11:08:42,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=941, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1120, PETRI_PLACES=108, PETRI_TRANSITIONS=101} [2024-05-12 11:08:42,728 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 73 predicate places. [2024-05-12 11:08:42,728 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 101 transitions, 1120 flow [2024-05-12 11:08:42,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:42,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:08:42,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:08:42,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-05-12 11:08:42,730 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:08:42,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:08:42,730 INFO L85 PathProgramCache]: Analyzing trace with hash -382170554, now seen corresponding path program 2 times [2024-05-12 11:08:42,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:08:42,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709100912] [2024-05-12 11:08:42,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:08:42,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:08:42,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:08:43,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:08:43,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:08:43,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709100912] [2024-05-12 11:08:43,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709100912] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:08:43,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:08:43,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 11:08:43,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975523522] [2024-05-12 11:08:43,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:08:43,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 11:08:43,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:08:43,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 11:08:43,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-05-12 11:08:43,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:08:43,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 101 transitions, 1120 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:43,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:08:43,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:08:43,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:08:43,383 INFO L124 PetriNetUnfolderBase]: 583/1011 cut-off events. [2024-05-12 11:08:43,383 INFO L125 PetriNetUnfolderBase]: For 7361/7361 co-relation queries the response was YES. [2024-05-12 11:08:43,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5258 conditions, 1011 events. 583/1011 cut-off events. For 7361/7361 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 4741 event pairs, 86 based on Foata normal form. 3/997 useless extension candidates. Maximal degree in co-relation 5189. Up to 347 conditions per place. [2024-05-12 11:08:43,397 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 87 selfloop transitions, 52 changer transitions 0/145 dead transitions. [2024-05-12 11:08:43,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 145 transitions, 1669 flow [2024-05-12 11:08:43,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 11:08:43,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 11:08:43,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-05-12 11:08:43,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49117647058823527 [2024-05-12 11:08:43,399 INFO L175 Difference]: Start difference. First operand has 108 places, 101 transitions, 1120 flow. Second operand 10 states and 167 transitions. [2024-05-12 11:08:43,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 145 transitions, 1669 flow [2024-05-12 11:08:43,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 145 transitions, 1583 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-05-12 11:08:43,420 INFO L231 Difference]: Finished difference. Result has 113 places, 105 transitions, 1215 flow [2024-05-12 11:08:43,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1038, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1215, PETRI_PLACES=113, PETRI_TRANSITIONS=105} [2024-05-12 11:08:43,421 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 78 predicate places. [2024-05-12 11:08:43,421 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 105 transitions, 1215 flow [2024-05-12 11:08:43,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:43,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:08:43,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:08:43,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-05-12 11:08:43,422 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:08:43,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:08:43,422 INFO L85 PathProgramCache]: Analyzing trace with hash -382166834, now seen corresponding path program 3 times [2024-05-12 11:08:43,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:08:43,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309921878] [2024-05-12 11:08:43,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:08:43,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:08:43,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:08:43,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:08:43,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:08:43,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309921878] [2024-05-12 11:08:43,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309921878] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:08:43,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:08:43,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 11:08:43,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342081300] [2024-05-12 11:08:43,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:08:43,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 11:08:43,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:08:43,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 11:08:43,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-05-12 11:08:43,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:08:43,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 105 transitions, 1215 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:43,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:08:43,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:08:43,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:08:44,049 INFO L124 PetriNetUnfolderBase]: 601/1038 cut-off events. [2024-05-12 11:08:44,049 INFO L125 PetriNetUnfolderBase]: For 8196/8201 co-relation queries the response was YES. [2024-05-12 11:08:44,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5549 conditions, 1038 events. 601/1038 cut-off events. For 8196/8201 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4851 event pairs, 98 based on Foata normal form. 7/1028 useless extension candidates. Maximal degree in co-relation 5477. Up to 386 conditions per place. [2024-05-12 11:08:44,063 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 84 selfloop transitions, 54 changer transitions 0/144 dead transitions. [2024-05-12 11:08:44,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 144 transitions, 1701 flow [2024-05-12 11:08:44,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 11:08:44,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 11:08:44,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-05-12 11:08:44,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4852941176470588 [2024-05-12 11:08:44,067 INFO L175 Difference]: Start difference. First operand has 113 places, 105 transitions, 1215 flow. Second operand 10 states and 165 transitions. [2024-05-12 11:08:44,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 144 transitions, 1701 flow [2024-05-12 11:08:44,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 144 transitions, 1624 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-05-12 11:08:44,095 INFO L231 Difference]: Finished difference. Result has 117 places, 107 transitions, 1291 flow [2024-05-12 11:08:44,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1139, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1291, PETRI_PLACES=117, PETRI_TRANSITIONS=107} [2024-05-12 11:08:44,097 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 82 predicate places. [2024-05-12 11:08:44,097 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 107 transitions, 1291 flow [2024-05-12 11:08:44,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:44,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:08:44,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:08:44,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-05-12 11:08:44,098 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:08:44,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:08:44,099 INFO L85 PathProgramCache]: Analyzing trace with hash -382166679, now seen corresponding path program 1 times [2024-05-12 11:08:44,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:08:44,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552365836] [2024-05-12 11:08:44,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:08:44,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:08:44,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:08:44,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:08:44,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:08:44,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552365836] [2024-05-12 11:08:44,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552365836] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:08:44,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:08:44,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 11:08:44,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173177736] [2024-05-12 11:08:44,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:08:44,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 11:08:44,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:08:44,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 11:08:44,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-05-12 11:08:44,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:08:44,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 107 transitions, 1291 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:44,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:08:44,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:08:44,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:08:44,818 INFO L124 PetriNetUnfolderBase]: 619/1071 cut-off events. [2024-05-12 11:08:44,818 INFO L125 PetriNetUnfolderBase]: For 9365/9370 co-relation queries the response was YES. [2024-05-12 11:08:44,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5788 conditions, 1071 events. 619/1071 cut-off events. For 9365/9370 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 5082 event pairs, 92 based on Foata normal form. 7/1061 useless extension candidates. Maximal degree in co-relation 5714. Up to 410 conditions per place. [2024-05-12 11:08:44,830 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 85 selfloop transitions, 55 changer transitions 0/146 dead transitions. [2024-05-12 11:08:44,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 146 transitions, 1760 flow [2024-05-12 11:08:44,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 11:08:44,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 11:08:44,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-05-12 11:08:44,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4852941176470588 [2024-05-12 11:08:44,831 INFO L175 Difference]: Start difference. First operand has 117 places, 107 transitions, 1291 flow. Second operand 10 states and 165 transitions. [2024-05-12 11:08:44,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 146 transitions, 1760 flow [2024-05-12 11:08:44,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 146 transitions, 1648 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-05-12 11:08:44,858 INFO L231 Difference]: Finished difference. Result has 119 places, 109 transitions, 1329 flow [2024-05-12 11:08:44,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1181, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1329, PETRI_PLACES=119, PETRI_TRANSITIONS=109} [2024-05-12 11:08:44,859 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 84 predicate places. [2024-05-12 11:08:44,859 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 109 transitions, 1329 flow [2024-05-12 11:08:44,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:44,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:08:44,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:08:44,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-05-12 11:08:44,859 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:08:44,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:08:44,860 INFO L85 PathProgramCache]: Analyzing trace with hash -326755419, now seen corresponding path program 2 times [2024-05-12 11:08:44,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:08:44,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658306954] [2024-05-12 11:08:44,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:08:44,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:08:44,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:08:45,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:08:45,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:08:45,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658306954] [2024-05-12 11:08:45,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658306954] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:08:45,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:08:45,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 11:08:45,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419355004] [2024-05-12 11:08:45,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:08:45,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 11:08:45,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:08:45,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 11:08:45,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-05-12 11:08:45,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:08:45,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 109 transitions, 1329 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:45,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:08:45,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:08:45,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:08:45,534 INFO L124 PetriNetUnfolderBase]: 637/1098 cut-off events. [2024-05-12 11:08:45,535 INFO L125 PetriNetUnfolderBase]: For 10073/10078 co-relation queries the response was YES. [2024-05-12 11:08:45,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6024 conditions, 1098 events. 637/1098 cut-off events. For 10073/10078 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5200 event pairs, 98 based on Foata normal form. 7/1088 useless extension candidates. Maximal degree in co-relation 5949. Up to 455 conditions per place. [2024-05-12 11:08:45,551 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 88 selfloop transitions, 51 changer transitions 0/145 dead transitions. [2024-05-12 11:08:45,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 145 transitions, 1792 flow [2024-05-12 11:08:45,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 11:08:45,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 11:08:45,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-05-12 11:08:45,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47352941176470587 [2024-05-12 11:08:45,552 INFO L175 Difference]: Start difference. First operand has 119 places, 109 transitions, 1329 flow. Second operand 10 states and 161 transitions. [2024-05-12 11:08:45,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 145 transitions, 1792 flow [2024-05-12 11:08:45,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 145 transitions, 1699 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-05-12 11:08:45,581 INFO L231 Difference]: Finished difference. Result has 122 places, 111 transitions, 1380 flow [2024-05-12 11:08:45,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1237, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1380, PETRI_PLACES=122, PETRI_TRANSITIONS=111} [2024-05-12 11:08:45,581 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 87 predicate places. [2024-05-12 11:08:45,582 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 111 transitions, 1380 flow [2024-05-12 11:08:45,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:45,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:08:45,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:08:45,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-05-12 11:08:45,582 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:08:45,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:08:45,583 INFO L85 PathProgramCache]: Analyzing trace with hash -326759294, now seen corresponding path program 4 times [2024-05-12 11:08:45,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:08:45,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367049901] [2024-05-12 11:08:45,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:08:45,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:08:45,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:08:45,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:08:45,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:08:45,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367049901] [2024-05-12 11:08:45,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367049901] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:08:45,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:08:45,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 11:08:45,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845541782] [2024-05-12 11:08:45,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:08:45,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 11:08:45,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:08:45,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 11:08:45,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-05-12 11:08:45,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:08:45,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 111 transitions, 1380 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:45,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:08:45,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:08:45,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:08:46,221 INFO L124 PetriNetUnfolderBase]: 673/1158 cut-off events. [2024-05-12 11:08:46,221 INFO L125 PetriNetUnfolderBase]: For 12189/12194 co-relation queries the response was YES. [2024-05-12 11:08:46,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6504 conditions, 1158 events. 673/1158 cut-off events. For 12189/12194 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 5587 event pairs, 92 based on Foata normal form. 7/1148 useless extension candidates. Maximal degree in co-relation 6427. Up to 484 conditions per place. [2024-05-12 11:08:46,233 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 94 selfloop transitions, 52 changer transitions 0/152 dead transitions. [2024-05-12 11:08:46,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 152 transitions, 1957 flow [2024-05-12 11:08:46,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 11:08:46,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 11:08:46,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-05-12 11:08:46,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47941176470588237 [2024-05-12 11:08:46,235 INFO L175 Difference]: Start difference. First operand has 122 places, 111 transitions, 1380 flow. Second operand 10 states and 163 transitions. [2024-05-12 11:08:46,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 152 transitions, 1957 flow [2024-05-12 11:08:46,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 152 transitions, 1839 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-05-12 11:08:46,271 INFO L231 Difference]: Finished difference. Result has 125 places, 115 transitions, 1453 flow [2024-05-12 11:08:46,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1266, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1453, PETRI_PLACES=125, PETRI_TRANSITIONS=115} [2024-05-12 11:08:46,271 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 90 predicate places. [2024-05-12 11:08:46,271 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 115 transitions, 1453 flow [2024-05-12 11:08:46,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:46,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:08:46,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:08:46,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-05-12 11:08:46,272 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:08:46,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:08:46,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1186224750, now seen corresponding path program 5 times [2024-05-12 11:08:46,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:08:46,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222765490] [2024-05-12 11:08:46,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:08:46,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:08:46,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:08:46,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:08:46,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:08:46,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222765490] [2024-05-12 11:08:46,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222765490] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:08:46,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:08:46,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 11:08:46,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846118302] [2024-05-12 11:08:46,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:08:46,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 11:08:46,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:08:46,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 11:08:46,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-05-12 11:08:46,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:08:46,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 115 transitions, 1453 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:46,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:08:46,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:08:46,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:08:46,922 INFO L124 PetriNetUnfolderBase]: 691/1188 cut-off events. [2024-05-12 11:08:46,923 INFO L125 PetriNetUnfolderBase]: For 13282/13282 co-relation queries the response was YES. [2024-05-12 11:08:46,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6740 conditions, 1188 events. 691/1188 cut-off events. For 13282/13282 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 5774 event pairs, 98 based on Foata normal form. 3/1174 useless extension candidates. Maximal degree in co-relation 6661. Up to 527 conditions per place. [2024-05-12 11:08:46,933 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 91 selfloop transitions, 54 changer transitions 0/151 dead transitions. [2024-05-12 11:08:46,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 151 transitions, 1959 flow [2024-05-12 11:08:46,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 11:08:46,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 11:08:46,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-05-12 11:08:46,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47352941176470587 [2024-05-12 11:08:46,935 INFO L175 Difference]: Start difference. First operand has 125 places, 115 transitions, 1453 flow. Second operand 10 states and 161 transitions. [2024-05-12 11:08:46,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 151 transitions, 1959 flow [2024-05-12 11:08:46,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 151 transitions, 1881 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-05-12 11:08:46,971 INFO L231 Difference]: Finished difference. Result has 129 places, 117 transitions, 1534 flow [2024-05-12 11:08:46,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1376, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1534, PETRI_PLACES=129, PETRI_TRANSITIONS=117} [2024-05-12 11:08:46,972 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 94 predicate places. [2024-05-12 11:08:46,972 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 117 transitions, 1534 flow [2024-05-12 11:08:46,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:46,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:08:46,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:08:46,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-05-12 11:08:46,974 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:08:46,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:08:46,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1038615150, now seen corresponding path program 6 times [2024-05-12 11:08:46,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:08:46,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203076589] [2024-05-12 11:08:46,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:08:46,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:08:46,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:08:47,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:08:47,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:08:47,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203076589] [2024-05-12 11:08:47,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203076589] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:08:47,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:08:47,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 11:08:47,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101677868] [2024-05-12 11:08:47,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:08:47,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 11:08:47,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:08:47,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 11:08:47,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-05-12 11:08:47,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:08:47,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 117 transitions, 1534 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:47,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:08:47,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:08:47,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:08:47,630 INFO L124 PetriNetUnfolderBase]: 709/1215 cut-off events. [2024-05-12 11:08:47,630 INFO L125 PetriNetUnfolderBase]: For 14795/14795 co-relation queries the response was YES. [2024-05-12 11:08:47,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7024 conditions, 1215 events. 709/1215 cut-off events. For 14795/14795 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 5935 event pairs, 96 based on Foata normal form. 3/1201 useless extension candidates. Maximal degree in co-relation 6943. Up to 556 conditions per place. [2024-05-12 11:08:47,642 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 93 selfloop transitions, 54 changer transitions 0/153 dead transitions. [2024-05-12 11:08:47,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 153 transitions, 2047 flow [2024-05-12 11:08:47,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 11:08:47,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 11:08:47,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-05-12 11:08:47,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47352941176470587 [2024-05-12 11:08:47,644 INFO L175 Difference]: Start difference. First operand has 129 places, 117 transitions, 1534 flow. Second operand 10 states and 161 transitions. [2024-05-12 11:08:47,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 153 transitions, 2047 flow [2024-05-12 11:08:47,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 153 transitions, 1964 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-05-12 11:08:47,684 INFO L231 Difference]: Finished difference. Result has 132 places, 119 transitions, 1613 flow [2024-05-12 11:08:47,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1452, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1613, PETRI_PLACES=132, PETRI_TRANSITIONS=119} [2024-05-12 11:08:47,685 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 97 predicate places. [2024-05-12 11:08:47,685 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 119 transitions, 1613 flow [2024-05-12 11:08:47,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:47,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:08:47,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:08:47,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-05-12 11:08:47,686 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:08:47,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:08:47,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1038378775, now seen corresponding path program 3 times [2024-05-12 11:08:47,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:08:47,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206055769] [2024-05-12 11:08:47,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:08:47,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:08:47,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:08:47,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:08:47,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:08:47,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206055769] [2024-05-12 11:08:47,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206055769] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:08:47,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:08:47,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 11:08:47,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159815178] [2024-05-12 11:08:47,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:08:47,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 11:08:47,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:08:47,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 11:08:47,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-05-12 11:08:48,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:08:48,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 119 transitions, 1613 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:48,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:08:48,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:08:48,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:08:48,353 INFO L124 PetriNetUnfolderBase]: 745/1275 cut-off events. [2024-05-12 11:08:48,354 INFO L125 PetriNetUnfolderBase]: For 16389/16394 co-relation queries the response was YES. [2024-05-12 11:08:48,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7461 conditions, 1275 events. 745/1275 cut-off events. For 16389/16394 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 6341 event pairs, 98 based on Foata normal form. 16/1274 useless extension candidates. Maximal degree in co-relation 7378. Up to 588 conditions per place. [2024-05-12 11:08:48,366 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 99 selfloop transitions, 55 changer transitions 0/160 dead transitions. [2024-05-12 11:08:48,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 160 transitions, 2167 flow [2024-05-12 11:08:48,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 11:08:48,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 11:08:48,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-05-12 11:08:48,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4823529411764706 [2024-05-12 11:08:48,368 INFO L175 Difference]: Start difference. First operand has 132 places, 119 transitions, 1613 flow. Second operand 10 states and 164 transitions. [2024-05-12 11:08:48,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 160 transitions, 2167 flow [2024-05-12 11:08:48,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 160 transitions, 2045 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-05-12 11:08:48,415 INFO L231 Difference]: Finished difference. Result has 135 places, 123 transitions, 1689 flow [2024-05-12 11:08:48,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1497, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1689, PETRI_PLACES=135, PETRI_TRANSITIONS=123} [2024-05-12 11:08:48,416 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 100 predicate places. [2024-05-12 11:08:48,416 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 123 transitions, 1689 flow [2024-05-12 11:08:48,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:48,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:08:48,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:08:48,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-05-12 11:08:48,417 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:08:48,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:08:48,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1038614995, now seen corresponding path program 4 times [2024-05-12 11:08:48,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:08:48,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150439750] [2024-05-12 11:08:48,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:08:48,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:08:48,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:08:48,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:08:48,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:08:48,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150439750] [2024-05-12 11:08:48,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150439750] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:08:48,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:08:48,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 11:08:48,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933717103] [2024-05-12 11:08:48,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:08:48,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 11:08:48,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:08:48,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 11:08:48,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-05-12 11:08:48,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:08:48,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 123 transitions, 1689 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:48,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:08:48,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:08:48,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:08:49,072 INFO L124 PetriNetUnfolderBase]: 763/1305 cut-off events. [2024-05-12 11:08:49,073 INFO L125 PetriNetUnfolderBase]: For 18011/18016 co-relation queries the response was YES. [2024-05-12 11:08:49,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7795 conditions, 1305 events. 763/1305 cut-off events. For 18011/18016 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 6510 event pairs, 98 based on Foata normal form. 7/1295 useless extension candidates. Maximal degree in co-relation 7710. Up to 613 conditions per place. [2024-05-12 11:08:49,088 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 95 selfloop transitions, 58 changer transitions 0/159 dead transitions. [2024-05-12 11:08:49,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 159 transitions, 2195 flow [2024-05-12 11:08:49,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 11:08:49,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 11:08:49,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-05-12 11:08:49,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47352941176470587 [2024-05-12 11:08:49,090 INFO L175 Difference]: Start difference. First operand has 135 places, 123 transitions, 1689 flow. Second operand 10 states and 161 transitions. [2024-05-12 11:08:49,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 159 transitions, 2195 flow [2024-05-12 11:08:49,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 159 transitions, 2105 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-05-12 11:08:49,144 INFO L231 Difference]: Finished difference. Result has 139 places, 125 transitions, 1764 flow [2024-05-12 11:08:49,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1600, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1764, PETRI_PLACES=139, PETRI_TRANSITIONS=125} [2024-05-12 11:08:49,144 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 104 predicate places. [2024-05-12 11:08:49,145 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 125 transitions, 1764 flow [2024-05-12 11:08:49,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:49,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:08:49,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:08:49,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-05-12 11:08:49,146 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:08:49,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:08:49,146 INFO L85 PathProgramCache]: Analyzing trace with hash -198769292, now seen corresponding path program 7 times [2024-05-12 11:08:49,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:08:49,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022108427] [2024-05-12 11:08:49,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:08:49,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:08:49,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:08:49,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:08:49,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:08:49,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022108427] [2024-05-12 11:08:49,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022108427] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:08:49,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:08:49,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 11:08:49,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709413305] [2024-05-12 11:08:49,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:08:49,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 11:08:49,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:08:49,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 11:08:49,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-05-12 11:08:49,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:08:49,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 125 transitions, 1764 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:49,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:08:49,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:08:49,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:08:49,813 INFO L124 PetriNetUnfolderBase]: 781/1331 cut-off events. [2024-05-12 11:08:49,814 INFO L125 PetriNetUnfolderBase]: For 20951/20957 co-relation queries the response was YES. [2024-05-12 11:08:49,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8130 conditions, 1331 events. 781/1331 cut-off events. For 20951/20957 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 6663 event pairs, 101 based on Foata normal form. 9/1323 useless extension candidates. Maximal degree in co-relation 8043. Up to 637 conditions per place. [2024-05-12 11:08:49,826 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 93 selfloop transitions, 59 changer transitions 0/158 dead transitions. [2024-05-12 11:08:49,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 158 transitions, 2297 flow [2024-05-12 11:08:49,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 11:08:49,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 11:08:49,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-05-12 11:08:49,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4647058823529412 [2024-05-12 11:08:49,827 INFO L175 Difference]: Start difference. First operand has 139 places, 125 transitions, 1764 flow. Second operand 10 states and 158 transitions. [2024-05-12 11:08:49,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 158 transitions, 2297 flow [2024-05-12 11:08:49,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 158 transitions, 2200 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-05-12 11:08:49,879 INFO L231 Difference]: Finished difference. Result has 142 places, 127 transitions, 1843 flow [2024-05-12 11:08:49,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1668, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1843, PETRI_PLACES=142, PETRI_TRANSITIONS=127} [2024-05-12 11:08:49,880 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 107 predicate places. [2024-05-12 11:08:49,880 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 127 transitions, 1843 flow [2024-05-12 11:08:49,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:49,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:08:49,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:08:49,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-05-12 11:08:49,881 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:08:49,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:08:49,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1057049021, now seen corresponding path program 5 times [2024-05-12 11:08:49,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:08:49,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736253065] [2024-05-12 11:08:49,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:08:49,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:08:49,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:08:50,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:08:50,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:08:50,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736253065] [2024-05-12 11:08:50,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736253065] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:08:50,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:08:50,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 11:08:50,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401123953] [2024-05-12 11:08:50,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:08:50,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 11:08:50,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:08:50,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 11:08:50,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-05-12 11:08:50,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:08:50,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 127 transitions, 1843 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:50,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:08:50,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:08:50,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:08:50,519 INFO L124 PetriNetUnfolderBase]: 799/1358 cut-off events. [2024-05-12 11:08:50,519 INFO L125 PetriNetUnfolderBase]: For 22219/22225 co-relation queries the response was YES. [2024-05-12 11:08:50,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8318 conditions, 1358 events. 799/1358 cut-off events. For 22219/22225 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 6814 event pairs, 99 based on Foata normal form. 9/1350 useless extension candidates. Maximal degree in co-relation 8229. Up to 661 conditions per place. [2024-05-12 11:08:50,533 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 94 selfloop transitions, 60 changer transitions 0/160 dead transitions. [2024-05-12 11:08:50,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 160 transitions, 2349 flow [2024-05-12 11:08:50,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 11:08:50,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 11:08:50,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-05-12 11:08:50,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4647058823529412 [2024-05-12 11:08:50,535 INFO L175 Difference]: Start difference. First operand has 142 places, 127 transitions, 1843 flow. Second operand 10 states and 158 transitions. [2024-05-12 11:08:50,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 160 transitions, 2349 flow [2024-05-12 11:08:50,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 160 transitions, 2219 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-05-12 11:08:50,591 INFO L231 Difference]: Finished difference. Result has 144 places, 129 transitions, 1886 flow [2024-05-12 11:08:50,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1715, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1886, PETRI_PLACES=144, PETRI_TRANSITIONS=129} [2024-05-12 11:08:50,592 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 109 predicate places. [2024-05-12 11:08:50,592 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 129 transitions, 1886 flow [2024-05-12 11:08:50,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:50,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:08:50,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:08:50,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-05-12 11:08:50,593 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:08:50,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:08:50,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1056812801, now seen corresponding path program 6 times [2024-05-12 11:08:50,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:08:50,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361074634] [2024-05-12 11:08:50,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:08:50,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:08:50,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:08:50,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:08:50,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:08:50,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361074634] [2024-05-12 11:08:50,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361074634] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:08:50,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:08:50,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 11:08:50,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104869377] [2024-05-12 11:08:50,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:08:50,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 11:08:50,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:08:50,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 11:08:50,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-05-12 11:08:50,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:08:50,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 129 transitions, 1886 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:50,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:08:50,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:08:50,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:08:51,280 INFO L124 PetriNetUnfolderBase]: 835/1421 cut-off events. [2024-05-12 11:08:51,281 INFO L125 PetriNetUnfolderBase]: For 24198/24198 co-relation queries the response was YES. [2024-05-12 11:08:51,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8818 conditions, 1421 events. 835/1421 cut-off events. For 24198/24198 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 7277 event pairs, 107 based on Foata normal form. 12/1416 useless extension candidates. Maximal degree in co-relation 8728. Up to 693 conditions per place. [2024-05-12 11:08:51,296 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 100 selfloop transitions, 61 changer transitions 0/167 dead transitions. [2024-05-12 11:08:51,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 167 transitions, 2466 flow [2024-05-12 11:08:51,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 11:08:51,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 11:08:51,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-05-12 11:08:51,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47352941176470587 [2024-05-12 11:08:51,298 INFO L175 Difference]: Start difference. First operand has 144 places, 129 transitions, 1886 flow. Second operand 10 states and 161 transitions. [2024-05-12 11:08:51,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 167 transitions, 2466 flow [2024-05-12 11:08:51,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 167 transitions, 2362 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-05-12 11:08:51,366 INFO L231 Difference]: Finished difference. Result has 148 places, 133 transitions, 2002 flow [2024-05-12 11:08:51,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1786, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2002, PETRI_PLACES=148, PETRI_TRANSITIONS=133} [2024-05-12 11:08:51,367 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 113 predicate places. [2024-05-12 11:08:51,367 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 133 transitions, 2002 flow [2024-05-12 11:08:51,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:51,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:08:51,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:08:51,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-05-12 11:08:51,368 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:08:51,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:08:51,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1204658776, now seen corresponding path program 8 times [2024-05-12 11:08:51,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:08:51,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071985293] [2024-05-12 11:08:51,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:08:51,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:08:51,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:08:51,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:08:51,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:08:51,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071985293] [2024-05-12 11:08:51,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071985293] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:08:51,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:08:51,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 11:08:51,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894359026] [2024-05-12 11:08:51,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:08:51,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 11:08:51,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:08:51,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 11:08:51,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-05-12 11:08:51,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:08:51,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 133 transitions, 2002 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:51,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:08:51,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:08:51,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:08:52,024 INFO L124 PetriNetUnfolderBase]: 853/1448 cut-off events. [2024-05-12 11:08:52,024 INFO L125 PetriNetUnfolderBase]: For 27567/27567 co-relation queries the response was YES. [2024-05-12 11:08:52,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9258 conditions, 1448 events. 853/1448 cut-off events. For 27567/27567 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 7385 event pairs, 113 based on Foata normal form. 3/1434 useless extension candidates. Maximal degree in co-relation 9165. Up to 713 conditions per place. [2024-05-12 11:08:52,042 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 95 selfloop transitions, 65 changer transitions 0/166 dead transitions. [2024-05-12 11:08:52,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 166 transitions, 2569 flow [2024-05-12 11:08:52,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 11:08:52,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 11:08:52,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-05-12 11:08:52,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4647058823529412 [2024-05-12 11:08:52,044 INFO L175 Difference]: Start difference. First operand has 148 places, 133 transitions, 2002 flow. Second operand 10 states and 158 transitions. [2024-05-12 11:08:52,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 166 transitions, 2569 flow [2024-05-12 11:08:52,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 166 transitions, 2466 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-05-12 11:08:52,111 INFO L231 Difference]: Finished difference. Result has 152 places, 135 transitions, 2091 flow [2024-05-12 11:08:52,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1900, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2091, PETRI_PLACES=152, PETRI_TRANSITIONS=135} [2024-05-12 11:08:52,112 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 117 predicate places. [2024-05-12 11:08:52,112 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 135 transitions, 2091 flow [2024-05-12 11:08:52,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:52,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:08:52,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:08:52,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-05-12 11:08:52,113 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:08:52,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:08:52,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1204658621, now seen corresponding path program 7 times [2024-05-12 11:08:52,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:08:52,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898915337] [2024-05-12 11:08:52,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:08:52,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:08:52,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:08:52,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:08:52,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:08:52,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898915337] [2024-05-12 11:08:52,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898915337] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:08:52,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:08:52,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 11:08:52,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439565056] [2024-05-12 11:08:52,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:08:52,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 11:08:52,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:08:52,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 11:08:52,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-05-12 11:08:52,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:08:52,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 135 transitions, 2091 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:52,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:08:52,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:08:52,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:08:52,804 INFO L124 PetriNetUnfolderBase]: 871/1475 cut-off events. [2024-05-12 11:08:52,804 INFO L125 PetriNetUnfolderBase]: For 29257/29263 co-relation queries the response was YES. [2024-05-12 11:08:52,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9464 conditions, 1475 events. 871/1475 cut-off events. For 29257/29263 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 7534 event pairs, 111 based on Foata normal form. 9/1467 useless extension candidates. Maximal degree in co-relation 9369. Up to 737 conditions per place. [2024-05-12 11:08:52,819 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 96 selfloop transitions, 66 changer transitions 0/168 dead transitions. [2024-05-12 11:08:52,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 168 transitions, 2627 flow [2024-05-12 11:08:52,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 11:08:52,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 11:08:52,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-05-12 11:08:52,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4647058823529412 [2024-05-12 11:08:52,821 INFO L175 Difference]: Start difference. First operand has 152 places, 135 transitions, 2091 flow. Second operand 10 states and 158 transitions. [2024-05-12 11:08:52,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 168 transitions, 2627 flow [2024-05-12 11:08:52,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 168 transitions, 2483 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-05-12 11:08:52,893 INFO L231 Difference]: Finished difference. Result has 154 places, 137 transitions, 2138 flow [2024-05-12 11:08:52,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1949, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2138, PETRI_PLACES=154, PETRI_TRANSITIONS=137} [2024-05-12 11:08:52,895 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 119 predicate places. [2024-05-12 11:08:52,895 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 137 transitions, 2138 flow [2024-05-12 11:08:52,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:52,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:08:52,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:08:52,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-05-12 11:08:52,896 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:08:52,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:08:52,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1204720156, now seen corresponding path program 9 times [2024-05-12 11:08:52,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:08:52,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176843836] [2024-05-12 11:08:52,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:08:52,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:08:52,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:08:53,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:08:53,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:08:53,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176843836] [2024-05-12 11:08:53,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176843836] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:08:53,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:08:53,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 11:08:53,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836502728] [2024-05-12 11:08:53,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:08:53,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 11:08:53,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:08:53,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 11:08:53,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-05-12 11:08:53,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:08:53,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 137 transitions, 2138 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:53,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:08:53,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:08:53,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:08:53,603 INFO L124 PetriNetUnfolderBase]: 889/1505 cut-off events. [2024-05-12 11:08:53,603 INFO L125 PetriNetUnfolderBase]: For 31950/31956 co-relation queries the response was YES. [2024-05-12 11:08:53,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9802 conditions, 1505 events. 889/1505 cut-off events. For 31950/31956 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 7735 event pairs, 105 based on Foata normal form. 9/1497 useless extension candidates. Maximal degree in co-relation 9706. Up to 742 conditions per place. [2024-05-12 11:08:53,620 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 101 selfloop transitions, 67 changer transitions 0/174 dead transitions. [2024-05-12 11:08:53,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 174 transitions, 2806 flow [2024-05-12 11:08:53,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 11:08:53,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 11:08:53,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-05-12 11:08:53,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2024-05-12 11:08:53,622 INFO L175 Difference]: Start difference. First operand has 154 places, 137 transitions, 2138 flow. Second operand 10 states and 160 transitions. [2024-05-12 11:08:53,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 174 transitions, 2806 flow [2024-05-12 11:08:53,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 174 transitions, 2696 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-05-12 11:08:53,694 INFO L231 Difference]: Finished difference. Result has 158 places, 140 transitions, 2253 flow [2024-05-12 11:08:53,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2030, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2253, PETRI_PLACES=158, PETRI_TRANSITIONS=140} [2024-05-12 11:08:53,695 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 123 predicate places. [2024-05-12 11:08:53,695 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 140 transitions, 2253 flow [2024-05-12 11:08:53,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:53,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:08:53,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:08:53,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-05-12 11:08:53,695 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:08:53,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:08:53,696 INFO L85 PathProgramCache]: Analyzing trace with hash 31155693, now seen corresponding path program 8 times [2024-05-12 11:08:53,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:08:53,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200200707] [2024-05-12 11:08:53,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:08:53,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:08:53,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:08:53,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:08:53,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:08:53,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200200707] [2024-05-12 11:08:53,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200200707] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:08:53,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:08:53,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 11:08:53,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126390858] [2024-05-12 11:08:53,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:08:53,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 11:08:53,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:08:53,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 11:08:53,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-05-12 11:08:54,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:08:54,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 140 transitions, 2253 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:54,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:08:54,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:08:54,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:08:54,391 INFO L124 PetriNetUnfolderBase]: 925/1565 cut-off events. [2024-05-12 11:08:54,391 INFO L125 PetriNetUnfolderBase]: For 34162/34168 co-relation queries the response was YES. [2024-05-12 11:08:54,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10284 conditions, 1565 events. 925/1565 cut-off events. For 34162/34168 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 8148 event pairs, 105 based on Foata normal form. 12/1560 useless extension candidates. Maximal degree in co-relation 10186. Up to 798 conditions per place. [2024-05-12 11:08:54,410 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 99 selfloop transitions, 71 changer transitions 0/176 dead transitions. [2024-05-12 11:08:54,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 176 transitions, 2865 flow [2024-05-12 11:08:54,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 11:08:54,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 11:08:54,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 157 transitions. [2024-05-12 11:08:54,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46176470588235297 [2024-05-12 11:08:54,416 INFO L175 Difference]: Start difference. First operand has 158 places, 140 transitions, 2253 flow. Second operand 10 states and 157 transitions. [2024-05-12 11:08:54,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 176 transitions, 2865 flow [2024-05-12 11:08:54,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 176 transitions, 2745 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-05-12 11:08:54,499 INFO L231 Difference]: Finished difference. Result has 161 places, 145 transitions, 2402 flow [2024-05-12 11:08:54,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2137, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2402, PETRI_PLACES=161, PETRI_TRANSITIONS=145} [2024-05-12 11:08:54,501 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 126 predicate places. [2024-05-12 11:08:54,501 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 145 transitions, 2402 flow [2024-05-12 11:08:54,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:54,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:08:54,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:08:54,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-05-12 11:08:54,502 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:08:54,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:08:54,502 INFO L85 PathProgramCache]: Analyzing trace with hash 23112123, now seen corresponding path program 9 times [2024-05-12 11:08:54,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:08:54,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979428357] [2024-05-12 11:08:54,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:08:54,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:08:54,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:08:54,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:08:54,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:08:54,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979428357] [2024-05-12 11:08:54,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979428357] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:08:54,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:08:54,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 11:08:54,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944486832] [2024-05-12 11:08:54,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:08:54,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 11:08:54,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:08:54,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 11:08:54,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-05-12 11:08:54,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:08:54,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 145 transitions, 2402 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:54,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:08:54,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:08:54,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:08:55,178 INFO L124 PetriNetUnfolderBase]: 925/1565 cut-off events. [2024-05-12 11:08:55,178 INFO L125 PetriNetUnfolderBase]: For 38341/38347 co-relation queries the response was YES. [2024-05-12 11:08:55,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10606 conditions, 1565 events. 925/1565 cut-off events. For 38341/38347 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 8132 event pairs, 107 based on Foata normal form. 12/1560 useless extension candidates. Maximal degree in co-relation 10506. Up to 822 conditions per place. [2024-05-12 11:08:55,197 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 101 selfloop transitions, 73 changer transitions 0/180 dead transitions. [2024-05-12 11:08:55,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 180 transitions, 2986 flow [2024-05-12 11:08:55,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 11:08:55,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 11:08:55,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-05-12 11:08:55,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47352941176470587 [2024-05-12 11:08:55,200 INFO L175 Difference]: Start difference. First operand has 161 places, 145 transitions, 2402 flow. Second operand 10 states and 161 transitions. [2024-05-12 11:08:55,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 180 transitions, 2986 flow [2024-05-12 11:08:55,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 180 transitions, 2861 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-05-12 11:08:55,304 INFO L231 Difference]: Finished difference. Result has 166 places, 148 transitions, 2507 flow [2024-05-12 11:08:55,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2280, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2507, PETRI_PLACES=166, PETRI_TRANSITIONS=148} [2024-05-12 11:08:55,305 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 131 predicate places. [2024-05-12 11:08:55,305 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 148 transitions, 2507 flow [2024-05-12 11:08:55,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:55,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:08:55,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:08:55,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-05-12 11:08:55,306 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:08:55,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:08:55,308 INFO L85 PathProgramCache]: Analyzing trace with hash 22875748, now seen corresponding path program 10 times [2024-05-12 11:08:55,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:08:55,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954269321] [2024-05-12 11:08:55,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:08:55,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:08:55,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:08:55,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:08:55,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:08:55,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954269321] [2024-05-12 11:08:55,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954269321] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:08:55,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:08:55,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 11:08:55,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728670699] [2024-05-12 11:08:55,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:08:55,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 11:08:55,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:08:55,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 11:08:55,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-05-12 11:08:55,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:08:55,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 148 transitions, 2507 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:55,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:08:55,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:08:55,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:08:55,929 INFO L124 PetriNetUnfolderBase]: 919/1556 cut-off events. [2024-05-12 11:08:55,929 INFO L125 PetriNetUnfolderBase]: For 39801/39807 co-relation queries the response was YES. [2024-05-12 11:08:55,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10566 conditions, 1556 events. 919/1556 cut-off events. For 39801/39807 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 8059 event pairs, 105 based on Foata normal form. 3/1542 useless extension candidates. Maximal degree in co-relation 10463. Up to 814 conditions per place. [2024-05-12 11:08:55,946 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 96 selfloop transitions, 75 changer transitions 0/177 dead transitions. [2024-05-12 11:08:55,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 177 transitions, 3041 flow [2024-05-12 11:08:55,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 11:08:55,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 11:08:55,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-05-12 11:08:55,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4647058823529412 [2024-05-12 11:08:55,948 INFO L175 Difference]: Start difference. First operand has 166 places, 148 transitions, 2507 flow. Second operand 10 states and 158 transitions. [2024-05-12 11:08:55,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 177 transitions, 3041 flow [2024-05-12 11:08:56,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 177 transitions, 2931 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-05-12 11:08:56,109 INFO L231 Difference]: Finished difference. Result has 171 places, 148 transitions, 2552 flow [2024-05-12 11:08:56,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2397, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2552, PETRI_PLACES=171, PETRI_TRANSITIONS=148} [2024-05-12 11:08:56,110 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 136 predicate places. [2024-05-12 11:08:56,110 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 148 transitions, 2552 flow [2024-05-12 11:08:56,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:56,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:08:56,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:08:56,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-05-12 11:08:56,111 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:08:56,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:08:56,111 INFO L85 PathProgramCache]: Analyzing trace with hash 22875903, now seen corresponding path program 10 times [2024-05-12 11:08:56,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:08:56,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697579831] [2024-05-12 11:08:56,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:08:56,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:08:56,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:08:56,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:08:56,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:08:56,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697579831] [2024-05-12 11:08:56,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697579831] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:08:56,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:08:56,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 11:08:56,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349140233] [2024-05-12 11:08:56,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:08:56,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 11:08:56,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:08:56,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 11:08:56,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-05-12 11:08:56,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:08:56,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 148 transitions, 2552 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:56,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:08:56,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:08:56,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:08:56,812 INFO L124 PetriNetUnfolderBase]: 937/1586 cut-off events. [2024-05-12 11:08:56,812 INFO L125 PetriNetUnfolderBase]: For 42420/42426 co-relation queries the response was YES. [2024-05-12 11:08:56,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10779 conditions, 1586 events. 937/1586 cut-off events. For 42420/42426 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 8287 event pairs, 117 based on Foata normal form. 3/1572 useless extension candidates. Maximal degree in co-relation 10673. Up to 838 conditions per place. [2024-05-12 11:08:56,831 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 97 selfloop transitions, 76 changer transitions 0/179 dead transitions. [2024-05-12 11:08:56,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 179 transitions, 3110 flow [2024-05-12 11:08:56,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 11:08:56,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 11:08:56,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-05-12 11:08:56,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4647058823529412 [2024-05-12 11:08:56,834 INFO L175 Difference]: Start difference. First operand has 171 places, 148 transitions, 2552 flow. Second operand 10 states and 158 transitions. [2024-05-12 11:08:56,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 179 transitions, 3110 flow [2024-05-12 11:08:56,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 179 transitions, 2898 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-05-12 11:08:56,942 INFO L231 Difference]: Finished difference. Result has 172 places, 150 transitions, 2561 flow [2024-05-12 11:08:56,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2342, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2561, PETRI_PLACES=172, PETRI_TRANSITIONS=150} [2024-05-12 11:08:56,944 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 137 predicate places. [2024-05-12 11:08:56,944 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 150 transitions, 2561 flow [2024-05-12 11:08:56,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:08:56,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:08:56,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:08:56,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-05-12 11:08:56,945 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:08:56,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:08:56,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1957247865, now seen corresponding path program 1 times [2024-05-12 11:08:56,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:08:56,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455464873] [2024-05-12 11:08:56,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:08:56,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:08:56,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:08:57,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:08:57,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:08:57,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455464873] [2024-05-12 11:08:57,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455464873] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:08:57,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:08:57,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 11:08:57,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602944435] [2024-05-12 11:08:57,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:08:57,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 11:08:57,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:08:57,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 11:08:57,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-05-12 11:08:57,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:08:57,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 150 transitions, 2561 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:08:57,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:08:57,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:08:57,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:08:57,657 INFO L124 PetriNetUnfolderBase]: 991/1680 cut-off events. [2024-05-12 11:08:57,658 INFO L125 PetriNetUnfolderBase]: For 48161/48166 co-relation queries the response was YES. [2024-05-12 11:08:57,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11275 conditions, 1680 events. 991/1680 cut-off events. For 48161/48166 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 8911 event pairs, 60 based on Foata normal form. 13/1676 useless extension candidates. Maximal degree in co-relation 11169. Up to 685 conditions per place. [2024-05-12 11:08:57,674 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 112 selfloop transitions, 82 changer transitions 0/200 dead transitions. [2024-05-12 11:08:57,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 200 transitions, 3397 flow [2024-05-12 11:08:57,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 11:08:57,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 11:08:57,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-05-12 11:08:57,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4946524064171123 [2024-05-12 11:08:57,676 INFO L175 Difference]: Start difference. First operand has 172 places, 150 transitions, 2561 flow. Second operand 11 states and 185 transitions. [2024-05-12 11:08:57,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 200 transitions, 3397 flow [2024-05-12 11:08:57,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 200 transitions, 3264 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-05-12 11:08:57,761 INFO L231 Difference]: Finished difference. Result has 176 places, 151 transitions, 2624 flow [2024-05-12 11:08:57,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2429, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2624, PETRI_PLACES=176, PETRI_TRANSITIONS=151} [2024-05-12 11:08:57,762 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 141 predicate places. [2024-05-12 11:08:57,762 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 151 transitions, 2624 flow [2024-05-12 11:08:57,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:08:57,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:08:57,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:08:57,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-05-12 11:08:57,762 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:08:57,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:08:57,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1037615529, now seen corresponding path program 2 times [2024-05-12 11:08:57,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:08:57,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148136925] [2024-05-12 11:08:57,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:08:57,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:08:57,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:08:58,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:08:58,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:08:58,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148136925] [2024-05-12 11:08:58,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148136925] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:08:58,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:08:58,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 11:08:58,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852530945] [2024-05-12 11:08:58,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:08:58,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 11:08:58,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:08:58,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 11:08:58,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-05-12 11:08:58,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:08:58,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 151 transitions, 2624 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:08:58,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:08:58,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:08:58,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:08:58,570 INFO L124 PetriNetUnfolderBase]: 1045/1767 cut-off events. [2024-05-12 11:08:58,570 INFO L125 PetriNetUnfolderBase]: For 53897/53902 co-relation queries the response was YES. [2024-05-12 11:08:58,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11790 conditions, 1767 events. 1045/1767 cut-off events. For 53897/53902 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 9484 event pairs, 126 based on Foata normal form. 13/1763 useless extension candidates. Maximal degree in co-relation 11682. Up to 856 conditions per place. [2024-05-12 11:08:58,589 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 112 selfloop transitions, 80 changer transitions 0/198 dead transitions. [2024-05-12 11:08:58,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 198 transitions, 3395 flow [2024-05-12 11:08:58,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 11:08:58,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 11:08:58,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 183 transitions. [2024-05-12 11:08:58,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4893048128342246 [2024-05-12 11:08:58,590 INFO L175 Difference]: Start difference. First operand has 176 places, 151 transitions, 2624 flow. Second operand 11 states and 183 transitions. [2024-05-12 11:08:58,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 198 transitions, 3395 flow [2024-05-12 11:08:58,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 198 transitions, 3244 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-05-12 11:08:58,676 INFO L231 Difference]: Finished difference. Result has 180 places, 152 transitions, 2666 flow [2024-05-12 11:08:58,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2475, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2666, PETRI_PLACES=180, PETRI_TRANSITIONS=152} [2024-05-12 11:08:58,677 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 145 predicate places. [2024-05-12 11:08:58,677 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 152 transitions, 2666 flow [2024-05-12 11:08:58,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:08:58,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:08:58,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:08:58,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-05-12 11:08:58,678 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:08:58,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:08:58,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1037735499, now seen corresponding path program 3 times [2024-05-12 11:08:58,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:08:58,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742969637] [2024-05-12 11:08:58,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:08:58,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:08:58,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:08:58,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:08:58,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:08:58,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742969637] [2024-05-12 11:08:58,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742969637] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:08:58,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:08:58,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 11:08:58,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965029014] [2024-05-12 11:08:58,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:08:58,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 11:08:58,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:08:58,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 11:08:58,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-05-12 11:08:59,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:08:59,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 152 transitions, 2666 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:08:59,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:08:59,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:08:59,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:08:59,527 INFO L124 PetriNetUnfolderBase]: 1099/1860 cut-off events. [2024-05-12 11:08:59,527 INFO L125 PetriNetUnfolderBase]: For 58599/58599 co-relation queries the response was YES. [2024-05-12 11:08:59,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12316 conditions, 1860 events. 1099/1860 cut-off events. For 58599/58599 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 10135 event pairs, 150 based on Foata normal form. 9/1852 useless extension candidates. Maximal degree in co-relation 12207. Up to 947 conditions per place. [2024-05-12 11:08:59,543 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 108 selfloop transitions, 82 changer transitions 0/196 dead transitions. [2024-05-12 11:08:59,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 196 transitions, 3327 flow [2024-05-12 11:08:59,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 11:08:59,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 11:08:59,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 181 transitions. [2024-05-12 11:08:59,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4839572192513369 [2024-05-12 11:08:59,546 INFO L175 Difference]: Start difference. First operand has 180 places, 152 transitions, 2666 flow. Second operand 11 states and 181 transitions. [2024-05-12 11:08:59,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 196 transitions, 3327 flow [2024-05-12 11:08:59,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 196 transitions, 3184 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-05-12 11:08:59,639 INFO L231 Difference]: Finished difference. Result has 185 places, 153 transitions, 2720 flow [2024-05-12 11:08:59,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2525, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2720, PETRI_PLACES=185, PETRI_TRANSITIONS=153} [2024-05-12 11:08:59,640 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 150 predicate places. [2024-05-12 11:08:59,640 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 153 transitions, 2720 flow [2024-05-12 11:08:59,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:08:59,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:08:59,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:08:59,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-05-12 11:08:59,641 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:08:59,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:08:59,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1037730849, now seen corresponding path program 4 times [2024-05-12 11:08:59,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:08:59,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951047036] [2024-05-12 11:08:59,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:08:59,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:08:59,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:08:59,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:08:59,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:08:59,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951047036] [2024-05-12 11:08:59,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951047036] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:08:59,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:08:59,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 11:08:59,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300227130] [2024-05-12 11:08:59,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:08:59,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 11:08:59,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:08:59,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 11:08:59,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-05-12 11:08:59,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:08:59,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 153 transitions, 2720 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:08:59,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:08:59,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:08:59,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:09:00,430 INFO L124 PetriNetUnfolderBase]: 1153/1947 cut-off events. [2024-05-12 11:09:00,430 INFO L125 PetriNetUnfolderBase]: For 62521/62526 co-relation queries the response was YES. [2024-05-12 11:09:00,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12860 conditions, 1947 events. 1153/1947 cut-off events. For 62521/62526 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 10698 event pairs, 168 based on Foata normal form. 13/1943 useless extension candidates. Maximal degree in co-relation 12750. Up to 1019 conditions per place. [2024-05-12 11:09:00,446 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 108 selfloop transitions, 83 changer transitions 0/197 dead transitions. [2024-05-12 11:09:00,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 197 transitions, 3427 flow [2024-05-12 11:09:00,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 11:09:00,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 11:09:00,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 181 transitions. [2024-05-12 11:09:00,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4839572192513369 [2024-05-12 11:09:00,447 INFO L175 Difference]: Start difference. First operand has 185 places, 153 transitions, 2720 flow. Second operand 11 states and 181 transitions. [2024-05-12 11:09:00,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 197 transitions, 3427 flow [2024-05-12 11:09:00,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 197 transitions, 3249 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-05-12 11:09:00,553 INFO L231 Difference]: Finished difference. Result has 186 places, 154 transitions, 2741 flow [2024-05-12 11:09:00,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2544, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2741, PETRI_PLACES=186, PETRI_TRANSITIONS=154} [2024-05-12 11:09:00,554 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 151 predicate places. [2024-05-12 11:09:00,554 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 154 transitions, 2741 flow [2024-05-12 11:09:00,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:09:00,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:09:00,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:09:00,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-05-12 11:09:00,555 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:09:00,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:09:00,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1881739229, now seen corresponding path program 5 times [2024-05-12 11:09:00,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:09:00,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156147309] [2024-05-12 11:09:00,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:09:00,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:09:00,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:09:00,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:09:00,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:09:00,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156147309] [2024-05-12 11:09:00,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156147309] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:09:00,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:09:00,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 11:09:00,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741972529] [2024-05-12 11:09:00,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:09:00,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 11:09:00,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:09:00,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 11:09:00,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-05-12 11:09:00,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:09:00,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 154 transitions, 2741 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:09:00,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:09:00,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:09:00,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:09:01,350 INFO L124 PetriNetUnfolderBase]: 1207/2037 cut-off events. [2024-05-12 11:09:01,350 INFO L125 PetriNetUnfolderBase]: For 66993/66998 co-relation queries the response was YES. [2024-05-12 11:09:01,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13380 conditions, 2037 events. 1207/2037 cut-off events. For 66993/66998 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 11318 event pairs, 186 based on Foata normal form. 13/2033 useless extension candidates. Maximal degree in co-relation 13269. Up to 1112 conditions per place. [2024-05-12 11:09:01,366 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 110 selfloop transitions, 79 changer transitions 0/195 dead transitions. [2024-05-12 11:09:01,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 195 transitions, 3436 flow [2024-05-12 11:09:01,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 11:09:01,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 11:09:01,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 177 transitions. [2024-05-12 11:09:01,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732620320855615 [2024-05-12 11:09:01,367 INFO L175 Difference]: Start difference. First operand has 186 places, 154 transitions, 2741 flow. Second operand 11 states and 177 transitions. [2024-05-12 11:09:01,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 195 transitions, 3436 flow [2024-05-12 11:09:01,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 195 transitions, 3272 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-05-12 11:09:01,475 INFO L231 Difference]: Finished difference. Result has 189 places, 155 transitions, 2768 flow [2024-05-12 11:09:01,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2579, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2768, PETRI_PLACES=189, PETRI_TRANSITIONS=155} [2024-05-12 11:09:01,475 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 154 predicate places. [2024-05-12 11:09:01,475 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 155 transitions, 2768 flow [2024-05-12 11:09:01,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:09:01,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:09:01,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:09:01,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-05-12 11:09:01,476 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:09:01,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:09:01,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1879836449, now seen corresponding path program 6 times [2024-05-12 11:09:01,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:09:01,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741897619] [2024-05-12 11:09:01,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:09:01,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:09:01,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:09:01,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:09:01,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:09:01,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741897619] [2024-05-12 11:09:01,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741897619] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:09:01,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:09:01,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 11:09:01,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647504815] [2024-05-12 11:09:01,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:09:01,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 11:09:01,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:09:01,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 11:09:01,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-05-12 11:09:01,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:09:01,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 155 transitions, 2768 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:09:01,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:09:01,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:09:01,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:09:02,247 INFO L124 PetriNetUnfolderBase]: 1261/2127 cut-off events. [2024-05-12 11:09:02,247 INFO L125 PetriNetUnfolderBase]: For 72476/72476 co-relation queries the response was YES. [2024-05-12 11:09:02,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13897 conditions, 2127 events. 1261/2127 cut-off events. For 72476/72476 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 11954 event pairs, 198 based on Foata normal form. 9/2119 useless extension candidates. Maximal degree in co-relation 13785. Up to 1165 conditions per place. [2024-05-12 11:09:02,263 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 114 selfloop transitions, 79 changer transitions 0/199 dead transitions. [2024-05-12 11:09:02,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 199 transitions, 3533 flow [2024-05-12 11:09:02,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 11:09:02,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 11:09:02,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 179 transitions. [2024-05-12 11:09:02,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4786096256684492 [2024-05-12 11:09:02,264 INFO L175 Difference]: Start difference. First operand has 189 places, 155 transitions, 2768 flow. Second operand 11 states and 179 transitions. [2024-05-12 11:09:02,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 199 transitions, 3533 flow [2024-05-12 11:09:02,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 199 transitions, 3381 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-05-12 11:09:02,364 INFO L231 Difference]: Finished difference. Result has 193 places, 156 transitions, 2807 flow [2024-05-12 11:09:02,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2618, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2807, PETRI_PLACES=193, PETRI_TRANSITIONS=156} [2024-05-12 11:09:02,365 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 158 predicate places. [2024-05-12 11:09:02,365 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 156 transitions, 2807 flow [2024-05-12 11:09:02,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:09:02,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:09:02,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:09:02,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-05-12 11:09:02,366 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:09:02,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:09:02,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1964266123, now seen corresponding path program 7 times [2024-05-12 11:09:02,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:09:02,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17367235] [2024-05-12 11:09:02,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:09:02,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:09:02,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:09:02,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:09:02,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:09:02,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17367235] [2024-05-12 11:09:02,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17367235] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:09:02,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:09:02,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 11:09:02,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9072314] [2024-05-12 11:09:02,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:09:02,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 11:09:02,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:09:02,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 11:09:02,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-05-12 11:09:02,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:09:02,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 156 transitions, 2807 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:09:02,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:09:02,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:09:02,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:09:03,197 INFO L124 PetriNetUnfolderBase]: 1315/2217 cut-off events. [2024-05-12 11:09:03,197 INFO L125 PetriNetUnfolderBase]: For 77949/77949 co-relation queries the response was YES. [2024-05-12 11:09:03,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14438 conditions, 2217 events. 1315/2217 cut-off events. For 77949/77949 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 12601 event pairs, 198 based on Foata normal form. 9/2209 useless extension candidates. Maximal degree in co-relation 14325. Up to 1256 conditions per place. [2024-05-12 11:09:03,213 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 110 selfloop transitions, 81 changer transitions 0/197 dead transitions. [2024-05-12 11:09:03,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 197 transitions, 3462 flow [2024-05-12 11:09:03,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 11:09:03,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 11:09:03,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 177 transitions. [2024-05-12 11:09:03,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732620320855615 [2024-05-12 11:09:03,214 INFO L175 Difference]: Start difference. First operand has 193 places, 156 transitions, 2807 flow. Second operand 11 states and 177 transitions. [2024-05-12 11:09:03,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 197 transitions, 3462 flow [2024-05-12 11:09:03,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 197 transitions, 3302 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-05-12 11:09:03,338 INFO L231 Difference]: Finished difference. Result has 195 places, 157 transitions, 2842 flow [2024-05-12 11:09:03,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2649, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2842, PETRI_PLACES=195, PETRI_TRANSITIONS=157} [2024-05-12 11:09:03,338 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 160 predicate places. [2024-05-12 11:09:03,338 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 157 transitions, 2842 flow [2024-05-12 11:09:03,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:09:03,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:09:03,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:09:03,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-05-12 11:09:03,339 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:09:03,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:09:03,340 INFO L85 PathProgramCache]: Analyzing trace with hash -2132120133, now seen corresponding path program 8 times [2024-05-12 11:09:03,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:09:03,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16067477] [2024-05-12 11:09:03,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:09:03,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:09:03,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:09:03,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:09:03,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:09:03,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16067477] [2024-05-12 11:09:03,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16067477] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:09:03,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:09:03,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 11:09:03,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561506326] [2024-05-12 11:09:03,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:09:03,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 11:09:03,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:09:03,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 11:09:03,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-05-12 11:09:03,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:09:03,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 157 transitions, 2842 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:09:03,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:09:03,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:09:03,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:09:04,173 INFO L124 PetriNetUnfolderBase]: 1369/2307 cut-off events. [2024-05-12 11:09:04,173 INFO L125 PetriNetUnfolderBase]: For 81661/81666 co-relation queries the response was YES. [2024-05-12 11:09:04,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14967 conditions, 2307 events. 1369/2307 cut-off events. For 81661/81666 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 13263 event pairs, 240 based on Foata normal form. 13/2303 useless extension candidates. Maximal degree in co-relation 14853. Up to 1332 conditions per place. [2024-05-12 11:09:04,241 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 116 selfloop transitions, 79 changer transitions 0/201 dead transitions. [2024-05-12 11:09:04,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 201 transitions, 3523 flow [2024-05-12 11:09:04,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 11:09:04,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 11:09:04,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 179 transitions. [2024-05-12 11:09:04,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4786096256684492 [2024-05-12 11:09:04,242 INFO L175 Difference]: Start difference. First operand has 195 places, 157 transitions, 2842 flow. Second operand 11 states and 179 transitions. [2024-05-12 11:09:04,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 201 transitions, 3523 flow [2024-05-12 11:09:04,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 201 transitions, 3359 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-05-12 11:09:04,377 INFO L231 Difference]: Finished difference. Result has 197 places, 158 transitions, 2869 flow [2024-05-12 11:09:04,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2680, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2869, PETRI_PLACES=197, PETRI_TRANSITIONS=158} [2024-05-12 11:09:04,378 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 162 predicate places. [2024-05-12 11:09:04,378 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 158 transitions, 2869 flow [2024-05-12 11:09:04,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:09:04,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:09:04,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:09:04,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-05-12 11:09:04,379 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:09:04,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:09:04,379 INFO L85 PathProgramCache]: Analyzing trace with hash -2132297763, now seen corresponding path program 9 times [2024-05-12 11:09:04,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:09:04,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537622419] [2024-05-12 11:09:04,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:09:04,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:09:04,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:09:04,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:09:04,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:09:04,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537622419] [2024-05-12 11:09:04,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537622419] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:09:04,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:09:04,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 11:09:04,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775690304] [2024-05-12 11:09:04,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:09:04,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 11:09:04,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:09:04,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 11:09:04,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-05-12 11:09:04,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:09:04,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 158 transitions, 2869 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:09:04,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:09:04,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:09:04,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:09:05,215 INFO L124 PetriNetUnfolderBase]: 1423/2397 cut-off events. [2024-05-12 11:09:05,215 INFO L125 PetriNetUnfolderBase]: For 86372/86377 co-relation queries the response was YES. [2024-05-12 11:09:05,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15490 conditions, 2397 events. 1423/2397 cut-off events. For 86372/86377 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 13901 event pairs, 240 based on Foata normal form. 13/2393 useless extension candidates. Maximal degree in co-relation 15375. Up to 1405 conditions per place. [2024-05-12 11:09:05,237 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 111 selfloop transitions, 82 changer transitions 0/199 dead transitions. [2024-05-12 11:09:05,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 199 transitions, 3572 flow [2024-05-12 11:09:05,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 11:09:05,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 11:09:05,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 177 transitions. [2024-05-12 11:09:05,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732620320855615 [2024-05-12 11:09:05,238 INFO L175 Difference]: Start difference. First operand has 197 places, 158 transitions, 2869 flow. Second operand 11 states and 177 transitions. [2024-05-12 11:09:05,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 199 transitions, 3572 flow [2024-05-12 11:09:05,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 199 transitions, 3412 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-05-12 11:09:05,376 INFO L231 Difference]: Finished difference. Result has 199 places, 159 transitions, 2906 flow [2024-05-12 11:09:05,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2711, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2906, PETRI_PLACES=199, PETRI_TRANSITIONS=159} [2024-05-12 11:09:05,377 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 164 predicate places. [2024-05-12 11:09:05,377 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 159 transitions, 2906 flow [2024-05-12 11:09:05,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:09:05,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:09:05,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:09:05,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-05-12 11:09:05,378 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:09:05,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:09:05,378 INFO L85 PathProgramCache]: Analyzing trace with hash -2132293113, now seen corresponding path program 10 times [2024-05-12 11:09:05,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:09:05,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676558544] [2024-05-12 11:09:05,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:09:05,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:09:05,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:09:05,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:09:05,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:09:05,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676558544] [2024-05-12 11:09:05,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676558544] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:09:05,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:09:05,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 11:09:05,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343031441] [2024-05-12 11:09:05,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:09:05,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 11:09:05,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:09:05,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 11:09:05,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-05-12 11:09:05,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:09:05,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 159 transitions, 2906 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:09:05,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:09:05,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:09:05,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:09:06,199 INFO L124 PetriNetUnfolderBase]: 1477/2487 cut-off events. [2024-05-12 11:09:06,200 INFO L125 PetriNetUnfolderBase]: For 91994/91994 co-relation queries the response was YES. [2024-05-12 11:09:06,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16028 conditions, 2487 events. 1477/2487 cut-off events. For 91994/91994 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 14612 event pairs, 234 based on Foata normal form. 9/2479 useless extension candidates. Maximal degree in co-relation 15912. Up to 1477 conditions per place. [2024-05-12 11:09:06,224 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 111 selfloop transitions, 83 changer transitions 0/200 dead transitions. [2024-05-12 11:09:06,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 200 transitions, 3567 flow [2024-05-12 11:09:06,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 11:09:06,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 11:09:06,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 177 transitions. [2024-05-12 11:09:06,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732620320855615 [2024-05-12 11:09:06,225 INFO L175 Difference]: Start difference. First operand has 199 places, 159 transitions, 2906 flow. Second operand 11 states and 177 transitions. [2024-05-12 11:09:06,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 200 transitions, 3567 flow [2024-05-12 11:09:06,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 200 transitions, 3404 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-05-12 11:09:06,372 INFO L231 Difference]: Finished difference. Result has 202 places, 160 transitions, 2942 flow [2024-05-12 11:09:06,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2745, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2942, PETRI_PLACES=202, PETRI_TRANSITIONS=160} [2024-05-12 11:09:06,372 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 167 predicate places. [2024-05-12 11:09:06,372 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 160 transitions, 2942 flow [2024-05-12 11:09:06,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:09:06,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:09:06,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:09:06,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-05-12 11:09:06,373 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:09:06,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:09:06,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1859552471, now seen corresponding path program 11 times [2024-05-12 11:09:06,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:09:06,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125171972] [2024-05-12 11:09:06,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:09:06,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:09:06,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:09:06,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:09:06,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:09:06,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125171972] [2024-05-12 11:09:06,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125171972] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:09:06,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:09:06,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 11:09:06,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235532299] [2024-05-12 11:09:06,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:09:06,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 11:09:06,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:09:06,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 11:09:06,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-05-12 11:09:06,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:09:06,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 160 transitions, 2942 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:09:06,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:09:06,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:09:06,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:09:07,125 INFO L124 PetriNetUnfolderBase]: 1531/2573 cut-off events. [2024-05-12 11:09:07,125 INFO L125 PetriNetUnfolderBase]: For 95789/95795 co-relation queries the response was YES. [2024-05-12 11:09:07,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16559 conditions, 2573 events. 1531/2573 cut-off events. For 95789/95795 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 15211 event pairs, 279 based on Foata normal form. 15/2571 useless extension candidates. Maximal degree in co-relation 16442. Up to 1548 conditions per place. [2024-05-12 11:09:07,148 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 113 selfloop transitions, 82 changer transitions 0/201 dead transitions. [2024-05-12 11:09:07,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 201 transitions, 3615 flow [2024-05-12 11:09:07,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 11:09:07,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 11:09:07,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 176 transitions. [2024-05-12 11:09:07,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2024-05-12 11:09:07,149 INFO L175 Difference]: Start difference. First operand has 202 places, 160 transitions, 2942 flow. Second operand 11 states and 176 transitions. [2024-05-12 11:09:07,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 201 transitions, 3615 flow [2024-05-12 11:09:07,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 201 transitions, 3447 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-05-12 11:09:07,307 INFO L231 Difference]: Finished difference. Result has 204 places, 161 transitions, 2971 flow [2024-05-12 11:09:07,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2776, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2971, PETRI_PLACES=204, PETRI_TRANSITIONS=161} [2024-05-12 11:09:07,308 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 169 predicate places. [2024-05-12 11:09:07,308 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 161 transitions, 2971 flow [2024-05-12 11:09:07,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:09:07,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:09:07,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:09:07,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-05-12 11:09:07,309 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:09:07,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:09:07,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1591214727, now seen corresponding path program 12 times [2024-05-12 11:09:07,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:09:07,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743870325] [2024-05-12 11:09:07,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:09:07,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:09:07,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:09:07,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:09:07,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:09:07,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743870325] [2024-05-12 11:09:07,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743870325] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:09:07,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:09:07,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 11:09:07,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487297304] [2024-05-12 11:09:07,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:09:07,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 11:09:07,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:09:07,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 11:09:07,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-05-12 11:09:07,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:09:07,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 161 transitions, 2971 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:09:07,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:09:07,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:09:07,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:09:08,203 INFO L124 PetriNetUnfolderBase]: 1585/2663 cut-off events. [2024-05-12 11:09:08,203 INFO L125 PetriNetUnfolderBase]: For 100452/100452 co-relation queries the response was YES. [2024-05-12 11:09:08,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17082 conditions, 2663 events. 1585/2663 cut-off events. For 100452/100452 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 15926 event pairs, 279 based on Foata normal form. 9/2655 useless extension candidates. Maximal degree in co-relation 16964. Up to 1621 conditions per place. [2024-05-12 11:09:08,225 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 108 selfloop transitions, 85 changer transitions 0/199 dead transitions. [2024-05-12 11:09:08,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 199 transitions, 3666 flow [2024-05-12 11:09:08,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 11:09:08,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 11:09:08,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 174 transitions. [2024-05-12 11:09:08,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46524064171123 [2024-05-12 11:09:08,226 INFO L175 Difference]: Start difference. First operand has 204 places, 161 transitions, 2971 flow. Second operand 11 states and 174 transitions. [2024-05-12 11:09:08,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 199 transitions, 3666 flow [2024-05-12 11:09:08,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 199 transitions, 3500 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-05-12 11:09:08,367 INFO L231 Difference]: Finished difference. Result has 206 places, 162 transitions, 3008 flow [2024-05-12 11:09:08,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2807, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3008, PETRI_PLACES=206, PETRI_TRANSITIONS=162} [2024-05-12 11:09:08,367 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 171 predicate places. [2024-05-12 11:09:08,367 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 162 transitions, 3008 flow [2024-05-12 11:09:08,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:09:08,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:09:08,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:09:08,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-05-12 11:09:08,368 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:09:08,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:09:08,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1591219377, now seen corresponding path program 13 times [2024-05-12 11:09:08,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:09:08,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497464472] [2024-05-12 11:09:08,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:09:08,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:09:08,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:09:08,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:09:08,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:09:08,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497464472] [2024-05-12 11:09:08,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497464472] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:09:08,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:09:08,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 11:09:08,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616224511] [2024-05-12 11:09:08,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:09:08,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 11:09:08,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:09:08,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 11:09:08,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-05-12 11:09:08,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:09:08,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 162 transitions, 3008 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:09:08,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:09:08,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:09:08,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:09:09,232 INFO L124 PetriNetUnfolderBase]: 1639/2753 cut-off events. [2024-05-12 11:09:09,232 INFO L125 PetriNetUnfolderBase]: For 105155/105161 co-relation queries the response was YES. [2024-05-12 11:09:09,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17620 conditions, 2753 events. 1639/2753 cut-off events. For 105155/105161 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 16570 event pairs, 297 based on Foata normal form. 15/2751 useless extension candidates. Maximal degree in co-relation 17501. Up to 1693 conditions per place. [2024-05-12 11:09:09,259 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 108 selfloop transitions, 86 changer transitions 0/200 dead transitions. [2024-05-12 11:09:09,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 200 transitions, 3661 flow [2024-05-12 11:09:09,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 11:09:09,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 11:09:09,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 174 transitions. [2024-05-12 11:09:09,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46524064171123 [2024-05-12 11:09:09,260 INFO L175 Difference]: Start difference. First operand has 206 places, 162 transitions, 3008 flow. Second operand 11 states and 174 transitions. [2024-05-12 11:09:09,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 200 transitions, 3661 flow [2024-05-12 11:09:09,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 200 transitions, 3489 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-05-12 11:09:09,492 INFO L231 Difference]: Finished difference. Result has 208 places, 163 transitions, 3041 flow [2024-05-12 11:09:09,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2838, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3041, PETRI_PLACES=208, PETRI_TRANSITIONS=163} [2024-05-12 11:09:09,493 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 173 predicate places. [2024-05-12 11:09:09,493 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 163 transitions, 3041 flow [2024-05-12 11:09:09,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:09:09,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:09:09,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:09:09,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-05-12 11:09:09,493 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:09:09,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:09:09,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1308381643, now seen corresponding path program 14 times [2024-05-12 11:09:09,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:09:09,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945885075] [2024-05-12 11:09:09,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:09:09,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:09:09,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:09:09,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:09:09,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:09:09,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945885075] [2024-05-12 11:09:09,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945885075] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:09:09,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:09:09,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 11:09:09,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553846738] [2024-05-12 11:09:09,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:09:09,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 11:09:09,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:09:09,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 11:09:09,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-05-12 11:09:09,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:09:09,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 163 transitions, 3041 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:09:09,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:09:09,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:09:09,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:09:10,278 INFO L124 PetriNetUnfolderBase]: 1693/2843 cut-off events. [2024-05-12 11:09:10,278 INFO L125 PetriNetUnfolderBase]: For 108671/108671 co-relation queries the response was YES. [2024-05-12 11:09:10,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18152 conditions, 2843 events. 1693/2843 cut-off events. For 108671/108671 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 17237 event pairs, 309 based on Foata normal form. 9/2835 useless extension candidates. Maximal degree in co-relation 18032. Up to 1741 conditions per place. [2024-05-12 11:09:10,308 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 111 selfloop transitions, 87 changer transitions 0/204 dead transitions. [2024-05-12 11:09:10,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 204 transitions, 3808 flow [2024-05-12 11:09:10,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 11:09:10,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 11:09:10,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 176 transitions. [2024-05-12 11:09:10,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2024-05-12 11:09:10,309 INFO L175 Difference]: Start difference. First operand has 208 places, 163 transitions, 3041 flow. Second operand 11 states and 176 transitions. [2024-05-12 11:09:10,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 204 transitions, 3808 flow [2024-05-12 11:09:10,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 204 transitions, 3637 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-05-12 11:09:10,490 INFO L231 Difference]: Finished difference. Result has 211 places, 164 transitions, 3077 flow [2024-05-12 11:09:10,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2872, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3077, PETRI_PLACES=211, PETRI_TRANSITIONS=164} [2024-05-12 11:09:10,491 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 176 predicate places. [2024-05-12 11:09:10,491 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 164 transitions, 3077 flow [2024-05-12 11:09:10,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:09:10,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:09:10,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:09:10,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-05-12 11:09:10,491 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:09:10,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:09:10,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1310284423, now seen corresponding path program 15 times [2024-05-12 11:09:10,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:09:10,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591217433] [2024-05-12 11:09:10,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:09:10,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:09:10,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:09:10,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:09:10,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:09:10,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591217433] [2024-05-12 11:09:10,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591217433] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:09:10,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:09:10,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 11:09:10,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263015551] [2024-05-12 11:09:10,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:09:10,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 11:09:10,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:09:10,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 11:09:10,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-05-12 11:09:10,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:09:10,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 164 transitions, 3077 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:09:10,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:09:10,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:09:10,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:09:11,306 INFO L124 PetriNetUnfolderBase]: 1747/2933 cut-off events. [2024-05-12 11:09:11,306 INFO L125 PetriNetUnfolderBase]: For 114549/114549 co-relation queries the response was YES. [2024-05-12 11:09:11,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18693 conditions, 2933 events. 1747/2933 cut-off events. For 114549/114549 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 17939 event pairs, 333 based on Foata normal form. 9/2925 useless extension candidates. Maximal degree in co-relation 18572. Up to 1832 conditions per place. [2024-05-12 11:09:11,334 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 107 selfloop transitions, 89 changer transitions 0/202 dead transitions. [2024-05-12 11:09:11,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 202 transitions, 3778 flow [2024-05-12 11:09:11,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 11:09:11,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 11:09:11,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 174 transitions. [2024-05-12 11:09:11,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46524064171123 [2024-05-12 11:09:11,335 INFO L175 Difference]: Start difference. First operand has 211 places, 164 transitions, 3077 flow. Second operand 11 states and 174 transitions. [2024-05-12 11:09:11,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 202 transitions, 3778 flow [2024-05-12 11:09:11,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 202 transitions, 3602 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-05-12 11:09:11,536 INFO L231 Difference]: Finished difference. Result has 213 places, 165 transitions, 3112 flow [2024-05-12 11:09:11,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2903, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3112, PETRI_PLACES=213, PETRI_TRANSITIONS=165} [2024-05-12 11:09:11,536 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 178 predicate places. [2024-05-12 11:09:11,537 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 165 transitions, 3112 flow [2024-05-12 11:09:11,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:09:11,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:09:11,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:09:11,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-05-12 11:09:11,537 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:09:11,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:09:11,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1310289073, now seen corresponding path program 16 times [2024-05-12 11:09:11,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:09:11,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356435374] [2024-05-12 11:09:11,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:09:11,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:09:11,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:09:11,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:09:11,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:09:11,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356435374] [2024-05-12 11:09:11,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356435374] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:09:11,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:09:11,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 11:09:11,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436656845] [2024-05-12 11:09:11,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:09:11,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 11:09:11,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:09:11,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 11:09:11,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-05-12 11:09:11,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:09:11,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 165 transitions, 3112 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:09:11,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:09:11,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:09:11,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:09:12,468 INFO L124 PetriNetUnfolderBase]: 1801/3023 cut-off events. [2024-05-12 11:09:12,469 INFO L125 PetriNetUnfolderBase]: For 120542/120548 co-relation queries the response was YES. [2024-05-12 11:09:12,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19222 conditions, 3023 events. 1801/3023 cut-off events. For 120542/120548 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 18640 event pairs, 327 based on Foata normal form. 15/3021 useless extension candidates. Maximal degree in co-relation 19100. Up to 1904 conditions per place. [2024-05-12 11:09:12,497 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 107 selfloop transitions, 90 changer transitions 0/203 dead transitions. [2024-05-12 11:09:12,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 203 transitions, 3771 flow [2024-05-12 11:09:12,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 11:09:12,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 11:09:12,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 174 transitions. [2024-05-12 11:09:12,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46524064171123 [2024-05-12 11:09:12,498 INFO L175 Difference]: Start difference. First operand has 213 places, 165 transitions, 3112 flow. Second operand 11 states and 174 transitions. [2024-05-12 11:09:12,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 203 transitions, 3771 flow [2024-05-12 11:09:12,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 203 transitions, 3594 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-05-12 11:09:12,715 INFO L231 Difference]: Finished difference. Result has 216 places, 166 transitions, 3148 flow [2024-05-12 11:09:12,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2937, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3148, PETRI_PLACES=216, PETRI_TRANSITIONS=166} [2024-05-12 11:09:12,715 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 181 predicate places. [2024-05-12 11:09:12,715 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 166 transitions, 3148 flow [2024-05-12 11:09:12,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:09:12,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:09:12,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:09:12,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-05-12 11:09:12,716 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:09:12,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:09:12,716 INFO L85 PathProgramCache]: Analyzing trace with hash 716476473, now seen corresponding path program 17 times [2024-05-12 11:09:12,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:09:12,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995130096] [2024-05-12 11:09:12,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:09:12,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:09:12,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:09:12,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:09:12,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:09:12,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995130096] [2024-05-12 11:09:12,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995130096] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:09:12,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:09:12,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 11:09:12,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905674719] [2024-05-12 11:09:12,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:09:12,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 11:09:12,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:09:12,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 11:09:12,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-05-12 11:09:13,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:09:13,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 166 transitions, 3148 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:09:13,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:09:13,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:09:13,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:09:13,661 INFO L124 PetriNetUnfolderBase]: 1855/3113 cut-off events. [2024-05-12 11:09:13,661 INFO L125 PetriNetUnfolderBase]: For 125466/125472 co-relation queries the response was YES. [2024-05-12 11:09:13,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19757 conditions, 3113 events. 1855/3113 cut-off events. For 125466/125472 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 19347 event pairs, 369 based on Foata normal form. 9/3105 useless extension candidates. Maximal degree in co-relation 19634. Up to 1980 conditions per place. [2024-05-12 11:09:13,691 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 110 selfloop transitions, 91 changer transitions 0/207 dead transitions. [2024-05-12 11:09:13,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 207 transitions, 3833 flow [2024-05-12 11:09:13,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 11:09:13,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 11:09:13,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 177 transitions. [2024-05-12 11:09:13,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732620320855615 [2024-05-12 11:09:13,693 INFO L175 Difference]: Start difference. First operand has 216 places, 166 transitions, 3148 flow. Second operand 11 states and 177 transitions. [2024-05-12 11:09:13,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 207 transitions, 3833 flow [2024-05-12 11:09:13,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 207 transitions, 3651 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-05-12 11:09:13,932 INFO L231 Difference]: Finished difference. Result has 218 places, 167 transitions, 3181 flow [2024-05-12 11:09:13,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2968, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3181, PETRI_PLACES=218, PETRI_TRANSITIONS=167} [2024-05-12 11:09:13,933 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 183 predicate places. [2024-05-12 11:09:13,933 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 167 transitions, 3181 flow [2024-05-12 11:09:13,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:09:13,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:09:13,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:09:13,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-05-12 11:09:13,933 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:09:13,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:09:13,934 INFO L85 PathProgramCache]: Analyzing trace with hash 709153653, now seen corresponding path program 18 times [2024-05-12 11:09:13,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:09:13,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045455048] [2024-05-12 11:09:13,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:09:13,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:09:13,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:09:14,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:09:14,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:09:14,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045455048] [2024-05-12 11:09:14,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045455048] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:09:14,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:09:14,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 11:09:14,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411285654] [2024-05-12 11:09:14,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:09:14,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 11:09:14,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:09:14,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 11:09:14,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-05-12 11:09:14,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:09:14,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 167 transitions, 3181 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:09:14,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:09:14,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:09:14,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:09:14,844 INFO L124 PetriNetUnfolderBase]: 1909/3203 cut-off events. [2024-05-12 11:09:14,844 INFO L125 PetriNetUnfolderBase]: For 130317/130323 co-relation queries the response was YES. [2024-05-12 11:09:14,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20289 conditions, 3203 events. 1909/3203 cut-off events. For 130317/130323 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 20029 event pairs, 345 based on Foata normal form. 9/3195 useless extension candidates. Maximal degree in co-relation 20165. Up to 2053 conditions per place. [2024-05-12 11:09:14,875 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 105 selfloop transitions, 94 changer transitions 0/205 dead transitions. [2024-05-12 11:09:14,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 205 transitions, 3844 flow [2024-05-12 11:09:14,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 11:09:14,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 11:09:14,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 175 transitions. [2024-05-12 11:09:14,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4679144385026738 [2024-05-12 11:09:14,876 INFO L175 Difference]: Start difference. First operand has 218 places, 167 transitions, 3181 flow. Second operand 11 states and 175 transitions. [2024-05-12 11:09:14,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 205 transitions, 3844 flow [2024-05-12 11:09:15,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 205 transitions, 3660 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-05-12 11:09:15,099 INFO L231 Difference]: Finished difference. Result has 220 places, 168 transitions, 3218 flow [2024-05-12 11:09:15,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2999, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3218, PETRI_PLACES=220, PETRI_TRANSITIONS=168} [2024-05-12 11:09:15,100 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 185 predicate places. [2024-05-12 11:09:15,100 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 168 transitions, 3218 flow [2024-05-12 11:09:15,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:09:15,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:09:15,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:09:15,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-05-12 11:09:15,101 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:09:15,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:09:15,101 INFO L85 PathProgramCache]: Analyzing trace with hash 965827143, now seen corresponding path program 19 times [2024-05-12 11:09:15,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:09:15,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232773694] [2024-05-12 11:09:15,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:09:15,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:09:15,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:09:15,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:09:15,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:09:15,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232773694] [2024-05-12 11:09:15,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232773694] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:09:15,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:09:15,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 11:09:15,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144447139] [2024-05-12 11:09:15,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:09:15,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 11:09:15,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:09:15,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 11:09:15,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-05-12 11:09:15,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:09:15,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 168 transitions, 3218 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:09:15,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:09:15,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:09:15,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:09:15,997 INFO L124 PetriNetUnfolderBase]: 1963/3296 cut-off events. [2024-05-12 11:09:15,997 INFO L125 PetriNetUnfolderBase]: For 133921/133927 co-relation queries the response was YES. [2024-05-12 11:09:16,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20830 conditions, 3296 events. 1963/3296 cut-off events. For 133921/133927 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 20716 event pairs, 381 based on Foata normal form. 9/3288 useless extension candidates. Maximal degree in co-relation 20705. Up to 2124 conditions per place. [2024-05-12 11:09:16,029 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 108 selfloop transitions, 93 changer transitions 0/207 dead transitions. [2024-05-12 11:09:16,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 207 transitions, 3899 flow [2024-05-12 11:09:16,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 11:09:16,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 11:09:16,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 172 transitions. [2024-05-12 11:09:16,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45989304812834225 [2024-05-12 11:09:16,030 INFO L175 Difference]: Start difference. First operand has 220 places, 168 transitions, 3218 flow. Second operand 11 states and 172 transitions. [2024-05-12 11:09:16,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 207 transitions, 3899 flow [2024-05-12 11:09:16,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 207 transitions, 3709 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-05-12 11:09:16,285 INFO L231 Difference]: Finished difference. Result has 222 places, 169 transitions, 3247 flow [2024-05-12 11:09:16,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3030, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3247, PETRI_PLACES=222, PETRI_TRANSITIONS=169} [2024-05-12 11:09:16,285 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 187 predicate places. [2024-05-12 11:09:16,286 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 169 transitions, 3247 flow [2024-05-12 11:09:16,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:09:16,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:09:16,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:09:16,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-05-12 11:09:16,286 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:09:16,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:09:16,286 INFO L85 PathProgramCache]: Analyzing trace with hash 709149003, now seen corresponding path program 20 times [2024-05-12 11:09:16,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:09:16,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437127113] [2024-05-12 11:09:16,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:09:16,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:09:16,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:09:16,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:09:16,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:09:16,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437127113] [2024-05-12 11:09:16,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437127113] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:09:16,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:09:16,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 11:09:16,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422718463] [2024-05-12 11:09:16,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:09:16,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 11:09:16,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:09:16,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 11:09:16,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-05-12 11:09:16,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-05-12 11:09:16,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 169 transitions, 3247 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:09:16,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:09:16,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-05-12 11:09:16,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:09:17,205 INFO L124 PetriNetUnfolderBase]: 1945/3266 cut-off events. [2024-05-12 11:09:17,205 INFO L125 PetriNetUnfolderBase]: For 123664/123670 co-relation queries the response was YES. [2024-05-12 11:09:17,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20240 conditions, 3266 events. 1945/3266 cut-off events. For 123664/123670 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 20572 event pairs, 357 based on Foata normal form. 9/3258 useless extension candidates. Maximal degree in co-relation 20114. Up to 2098 conditions per place. [2024-05-12 11:09:17,231 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 104 selfloop transitions, 95 changer transitions 0/205 dead transitions. [2024-05-12 11:09:17,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 205 transitions, 3823 flow [2024-05-12 11:09:17,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 11:09:17,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 11:09:17,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 174 transitions. [2024-05-12 11:09:17,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46524064171123 [2024-05-12 11:09:17,232 INFO L175 Difference]: Start difference. First operand has 222 places, 169 transitions, 3247 flow. Second operand 11 states and 174 transitions. [2024-05-12 11:09:17,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 205 transitions, 3823 flow [2024-05-12 11:09:17,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 205 transitions, 3542 flow, removed 0 selfloop flow, removed 40 redundant places. [2024-05-12 11:09:17,413 INFO L231 Difference]: Finished difference. Result has 191 places, 168 transitions, 3054 flow [2024-05-12 11:09:17,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2864, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3054, PETRI_PLACES=191, PETRI_TRANSITIONS=168} [2024-05-12 11:09:17,414 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 156 predicate places. [2024-05-12 11:09:17,414 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 168 transitions, 3054 flow [2024-05-12 11:09:17,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-05-12 11:09:17,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:09:17,414 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:09:17,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-05-12 11:09:17,415 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:09:17,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:09:17,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1016726273, now seen corresponding path program 2 times [2024-05-12 11:09:17,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:09:17,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383843555] [2024-05-12 11:09:17,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:09:17,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:09:17,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:09:17,468 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:09:17,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:09:17,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383843555] [2024-05-12 11:09:17,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383843555] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:09:17,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905455668] [2024-05-12 11:09:17,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-05-12 11:09:17,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:09:17,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:09:17,470 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) [2024-05-12 11:09:17,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-05-12 11:09:17,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-05-12 11:09:17,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:09:17,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 6 conjunts are in the unsatisfiable core [2024-05-12 11:09:17,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:09:17,597 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:09:17,598 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:09:17,640 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:09:17,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905455668] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:09:17,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:09:17,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-05-12 11:09:17,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727589143] [2024-05-12 11:09:17,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:09:17,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-05-12 11:09:17,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:09:17,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-05-12 11:09:17,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-05-12 11:09:17,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-05-12 11:09:17,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 168 transitions, 3054 flow. Second operand has 13 states, 13 states have (on average 15.76923076923077) internal successors, (205), 13 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:09:17,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:09:17,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-05-12 11:09:17,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:09:18,136 INFO L124 PetriNetUnfolderBase]: 1540/2812 cut-off events. [2024-05-12 11:09:18,137 INFO L125 PetriNetUnfolderBase]: For 100162/100454 co-relation queries the response was YES. [2024-05-12 11:09:18,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17939 conditions, 2812 events. 1540/2812 cut-off events. For 100162/100454 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 18283 event pairs, 638 based on Foata normal form. 105/2775 useless extension candidates. Maximal degree in co-relation 17846. Up to 1417 conditions per place. [2024-05-12 11:09:18,179 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 123 selfloop transitions, 79 changer transitions 0/232 dead transitions. [2024-05-12 11:09:18,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 232 transitions, 4278 flow [2024-05-12 11:09:18,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 11:09:18,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 11:09:18,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 262 transitions. [2024-05-12 11:09:18,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6421568627450981 [2024-05-12 11:09:18,180 INFO L175 Difference]: Start difference. First operand has 191 places, 168 transitions, 3054 flow. Second operand 12 states and 262 transitions. [2024-05-12 11:09:18,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 232 transitions, 4278 flow [2024-05-12 11:09:18,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 232 transitions, 3261 flow, removed 0 selfloop flow, removed 22 redundant places. [2024-05-12 11:09:18,387 INFO L231 Difference]: Finished difference. Result has 186 places, 174 transitions, 2257 flow [2024-05-12 11:09:18,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2037, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2257, PETRI_PLACES=186, PETRI_TRANSITIONS=174} [2024-05-12 11:09:18,387 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 151 predicate places. [2024-05-12 11:09:18,387 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 174 transitions, 2257 flow [2024-05-12 11:09:18,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 15.76923076923077) internal successors, (205), 13 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:09:18,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:09:18,388 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:09:18,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-05-12 11:09:18,589 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,SelfDestructingSolverStorable52 [2024-05-12 11:09:18,589 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:09:18,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:09:18,589 INFO L85 PathProgramCache]: Analyzing trace with hash 547116289, now seen corresponding path program 3 times [2024-05-12 11:09:18,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:09:18,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864362234] [2024-05-12 11:09:18,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:09:18,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:09:18,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:09:18,721 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:09:18,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:09:18,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864362234] [2024-05-12 11:09:18,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864362234] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:09:18,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224652559] [2024-05-12 11:09:18,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-05-12 11:09:18,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:09:18,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:09:18,723 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) [2024-05-12 11:09:18,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-05-12 11:09:18,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-05-12 11:09:18,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:09:18,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 12 conjunts are in the unsatisfiable core [2024-05-12 11:09:18,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:09:18,859 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:09:18,859 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:09:18,955 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:09:18,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224652559] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:09:18,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:09:18,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 17 [2024-05-12 11:09:18,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675239021] [2024-05-12 11:09:18,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:09:18,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-05-12 11:09:18,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:09:18,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-05-12 11:09:18,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2024-05-12 11:09:18,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-05-12 11:09:18,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 174 transitions, 2257 flow. Second operand has 17 states, 17 states have (on average 15.647058823529411) internal successors, (266), 17 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:09:18,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:09:18,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-05-12 11:09:18,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:09:19,375 INFO L124 PetriNetUnfolderBase]: 1636/2968 cut-off events. [2024-05-12 11:09:19,375 INFO L125 PetriNetUnfolderBase]: For 74901/75197 co-relation queries the response was YES. [2024-05-12 11:09:19,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18583 conditions, 2968 events. 1636/2968 cut-off events. For 74901/75197 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 18790 event pairs, 638 based on Foata normal form. 75/2897 useless extension candidates. Maximal degree in co-relation 18499. Up to 1417 conditions per place. [2024-05-12 11:09:19,401 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 147 selfloop transitions, 83 changer transitions 0/260 dead transitions. [2024-05-12 11:09:19,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 260 transitions, 3853 flow [2024-05-12 11:09:19,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-05-12 11:09:19,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-05-12 11:09:19,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 344 transitions. [2024-05-12 11:09:19,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6323529411764706 [2024-05-12 11:09:19,409 INFO L175 Difference]: Start difference. First operand has 186 places, 174 transitions, 2257 flow. Second operand 16 states and 344 transitions. [2024-05-12 11:09:19,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 260 transitions, 3853 flow [2024-05-12 11:09:19,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 260 transitions, 3636 flow, removed 17 selfloop flow, removed 13 redundant places. [2024-05-12 11:09:19,631 INFO L231 Difference]: Finished difference. Result has 192 places, 178 transitions, 2256 flow [2024-05-12 11:09:19,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2048, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2256, PETRI_PLACES=192, PETRI_TRANSITIONS=178} [2024-05-12 11:09:19,632 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 157 predicate places. [2024-05-12 11:09:19,632 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 178 transitions, 2256 flow [2024-05-12 11:09:19,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 15.647058823529411) internal successors, (266), 17 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:09:19,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:09:19,633 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:09:19,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-05-12 11:09:19,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:09:19,848 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:09:19,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:09:19,848 INFO L85 PathProgramCache]: Analyzing trace with hash 140402945, now seen corresponding path program 4 times [2024-05-12 11:09:19,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:09:19,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751306486] [2024-05-12 11:09:19,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:09:19,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:09:19,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:09:20,666 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:09:20,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:09:20,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751306486] [2024-05-12 11:09:20,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751306486] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:09:20,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068215529] [2024-05-12 11:09:20,667 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-05-12 11:09:20,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:09:20,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:09:20,668 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) [2024-05-12 11:09:20,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-05-12 11:09:20,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-05-12 11:09:20,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:09:20,777 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 53 conjunts are in the unsatisfiable core [2024-05-12 11:09:20,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:09:21,593 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 78 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:09:21,593 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:09:22,526 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:09:22,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068215529] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:09:22,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:09:22,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 60 [2024-05-12 11:09:22,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19861522] [2024-05-12 11:09:22,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:09:22,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-05-12 11:09:22,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:09:22,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-05-12 11:09:22,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=512, Invalid=3148, Unknown=0, NotChecked=0, Total=3660 [2024-05-12 11:09:23,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-05-12 11:09:23,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 178 transitions, 2256 flow. Second operand has 61 states, 61 states have (on average 8.426229508196721) internal successors, (514), 61 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:09:23,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:09:23,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-05-12 11:09:23,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:09:45,526 INFO L124 PetriNetUnfolderBase]: 26611/43719 cut-off events. [2024-05-12 11:09:45,526 INFO L125 PetriNetUnfolderBase]: For 794524/794529 co-relation queries the response was YES. [2024-05-12 11:09:45,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252017 conditions, 43719 events. 26611/43719 cut-off events. For 794524/794529 co-relation queries the response was YES. Maximal size of possible extension queue 911. Compared 315802 event pairs, 387 based on Foata normal form. 0/43392 useless extension candidates. Maximal degree in co-relation 251927. Up to 13092 conditions per place. [2024-05-12 11:09:46,115 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 760 selfloop transitions, 1040 changer transitions 701/2504 dead transitions. [2024-05-12 11:09:46,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 2504 transitions, 32481 flow [2024-05-12 11:09:46,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2024-05-12 11:09:46,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2024-05-12 11:09:46,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 2704 transitions. [2024-05-12 11:09:46,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.454453781512605 [2024-05-12 11:09:46,120 INFO L175 Difference]: Start difference. First operand has 192 places, 178 transitions, 2256 flow. Second operand 175 states and 2704 transitions. [2024-05-12 11:09:46,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 2504 transitions, 32481 flow [2024-05-12 11:09:47,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 2504 transitions, 30420 flow, removed 306 selfloop flow, removed 12 redundant places. [2024-05-12 11:09:47,734 INFO L231 Difference]: Finished difference. Result has 424 places, 1186 transitions, 14758 flow [2024-05-12 11:09:47,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2077, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=175, PETRI_FLOW=14758, PETRI_PLACES=424, PETRI_TRANSITIONS=1186} [2024-05-12 11:09:47,735 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 389 predicate places. [2024-05-12 11:09:47,735 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 1186 transitions, 14758 flow [2024-05-12 11:09:47,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 8.426229508196721) internal successors, (514), 61 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:09:47,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:09:47,736 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:09:47,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-05-12 11:09:47,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:09:47,952 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:09:47,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:09:47,952 INFO L85 PathProgramCache]: Analyzing trace with hash 191707097, now seen corresponding path program 1 times [2024-05-12 11:09:47,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:09:47,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332492342] [2024-05-12 11:09:47,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:09:47,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:09:47,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:09:48,827 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:09:48,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:09:48,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332492342] [2024-05-12 11:09:48,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332492342] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:09:48,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030210527] [2024-05-12 11:09:48,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:09:48,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:09:48,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:09:48,830 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) [2024-05-12 11:09:48,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-05-12 11:09:48,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:09:48,975 INFO L262 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 55 conjunts are in the unsatisfiable core [2024-05-12 11:09:48,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:09:49,865 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 78 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:09:49,866 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:09:50,943 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:09:50,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030210527] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:09:50,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:09:50,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 67 [2024-05-12 11:09:50,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007269491] [2024-05-12 11:09:50,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:09:50,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-05-12 11:09:50,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:09:50,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-05-12 11:09:50,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=542, Invalid=4014, Unknown=0, NotChecked=0, Total=4556 [2024-05-12 11:09:51,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-05-12 11:09:51,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 1186 transitions, 14758 flow. Second operand has 68 states, 68 states have (on average 8.455882352941176) internal successors, (575), 68 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:09:51,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:09:51,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-05-12 11:09:51,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand