./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/fib_unsafe-12.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/mutex-meet/fib_unsafe-12.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 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-12.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/fib_unsafe-12.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-76401ed-m [2024-06-20 18:15:32,212 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 18:15:32,294 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 18:15:32,302 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 18:15:32,303 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 18:15:32,339 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 18:15:32,340 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 18:15:32,340 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 18:15:32,341 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 18:15:32,344 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 18:15:32,345 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 18:15:32,345 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 18:15:32,346 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 18:15:32,347 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 18:15:32,347 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 18:15:32,348 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 18:15:32,348 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 18:15:32,348 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 18:15:32,349 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 18:15:32,349 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 18:15:32,349 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 18:15:32,349 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 18:15:32,350 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 18:15:32,350 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 18:15:32,350 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 18:15:32,350 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 18:15:32,351 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 18:15:32,351 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 18:15:32,352 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 18:15:32,352 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 18:15:32,353 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 18:15:32,353 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 18:15:32,353 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 18:15:32,353 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 18:15:32,354 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 18:15:32,354 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 18:15:32,354 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 18:15:32,354 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 18:15:32,354 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 18:15:32,355 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 18:15:32,355 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 18:15:32,355 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 18:15:32,355 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 18:15:32,356 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 18:15:32,630 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 18:15:32,653 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 18:15:32,655 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 18:15:32,656 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 18:15:32,657 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 18:15:32,658 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/fib_unsafe-12.yml/witness.yml [2024-06-20 18:15:32,764 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 18:15:32,765 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 18:15:32,765 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_unsafe-12.i [2024-06-20 18:15:33,962 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 18:15:34,200 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 18:15:34,204 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-12.i [2024-06-20 18:15:34,220 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d87b376ba/bd713b2407dc452a8008b0b34870faa7/FLAGfd41a44df [2024-06-20 18:15:34,232 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d87b376ba/bd713b2407dc452a8008b0b34870faa7 [2024-06-20 18:15:34,233 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 18:15:34,234 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 18:15:34,236 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 18:15:34,236 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 18:15:34,240 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 18:15:34,241 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 06:15:32" (1/2) ... [2024-06-20 18:15:34,242 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e857378 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 06:15:34, skipping insertion in model container [2024-06-20 18:15:34,242 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 06:15:32" (1/2) ... [2024-06-20 18:15:34,243 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5ab6a26e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 06:15:34, skipping insertion in model container [2024-06-20 18:15:34,243 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 06:15:34" (2/2) ... [2024-06-20 18:15:34,244 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e857378 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 06:15:34, skipping insertion in model container [2024-06-20 18:15:34,244 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 06:15:34" (2/2) ... [2024-06-20 18:15:34,244 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 18:15:34,287 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 18:15:34,288 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)) [2024-06-20 18:15:34,288 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)) [2024-06-20 18:15:34,289 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 18:15:34,289 INFO L106 edCorrectnessWitness]: ghost_update [L720-L720] multithreaded = 1; [2024-06-20 18:15:34,327 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 18:15:34,637 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 18:15:34,645 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 18:15:34,735 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 18:15:34,766 INFO L206 MainTranslator]: Completed translation [2024-06-20 18:15:34,768 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 06:15:34 WrapperNode [2024-06-20 18:15:34,768 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 18:15:34,769 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 18:15:34,769 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 18:15:34,770 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 18:15:34,776 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 06:15:34" (1/1) ... [2024-06-20 18:15:34,793 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 06:15:34" (1/1) ... [2024-06-20 18:15:34,817 INFO L138 Inliner]: procedures = 164, calls = 21, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 73 [2024-06-20 18:15:34,819 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 18:15:34,820 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 18:15:34,820 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 18:15:34,820 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 18:15:34,829 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 06:15:34" (1/1) ... [2024-06-20 18:15:34,829 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 06:15:34" (1/1) ... [2024-06-20 18:15:34,832 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 06:15:34" (1/1) ... [2024-06-20 18:15:34,843 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-20 18:15:34,843 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 06:15:34" (1/1) ... [2024-06-20 18:15:34,843 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 06:15:34" (1/1) ... [2024-06-20 18:15:34,848 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 06:15:34" (1/1) ... [2024-06-20 18:15:34,851 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 06:15:34" (1/1) ... [2024-06-20 18:15:34,852 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 06:15:34" (1/1) ... [2024-06-20 18:15:34,853 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 06:15:34" (1/1) ... [2024-06-20 18:15:34,855 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 18:15:34,856 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 18:15:34,856 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 18:15:34,856 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 18:15:34,857 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 06:15:34" (1/1) ... [2024-06-20 18:15:34,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 18:15:34,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 18:15:34,886 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-20 18:15:34,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-20 18:15:34,915 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-06-20 18:15:34,916 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-06-20 18:15:34,916 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-06-20 18:15:34,916 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-06-20 18:15:34,916 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 18:15:34,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 18:15:34,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 18:15:34,916 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 18:15:34,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 18:15:34,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 18:15:34,918 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 18:15:35,035 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 18:15:35,037 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 18:15:35,206 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 18:15:35,206 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 18:15:35,307 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 18:15:35,307 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-06-20 18:15:35,308 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 06:15:35 BoogieIcfgContainer [2024-06-20 18:15:35,308 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 18:15:35,310 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 18:15:35,311 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 18:15:35,315 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 18:15:35,315 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 06:15:32" (1/4) ... [2024-06-20 18:15:35,316 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a62ca14 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 06:15:35, skipping insertion in model container [2024-06-20 18:15:35,317 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 06:15:34" (2/4) ... [2024-06-20 18:15:35,317 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a62ca14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 06:15:35, skipping insertion in model container [2024-06-20 18:15:35,317 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 06:15:34" (3/4) ... [2024-06-20 18:15:35,317 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a62ca14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 06:15:35, skipping insertion in model container [2024-06-20 18:15:35,317 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 06:15:35" (4/4) ... [2024-06-20 18:15:35,318 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_unsafe-12.i [2024-06-20 18:15:35,335 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 18:15:35,335 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-20 18:15:35,335 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 18:15:35,367 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 18:15:35,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 29 transitions, 66 flow [2024-06-20 18:15:35,438 INFO L124 PetriNetUnfolderBase]: 3/27 cut-off events. [2024-06-20 18:15:35,447 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 18:15:35,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 27 events. 3/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 29 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2024-06-20 18:15:35,450 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 29 transitions, 66 flow [2024-06-20 18:15:35,454 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 27 transitions, 60 flow [2024-06-20 18:15:35,486 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 18:15:35,491 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;@792e6e52, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 18:15:35,492 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-20 18:15:35,495 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 18:15:35,496 INFO L124 PetriNetUnfolderBase]: 0/10 cut-off events. [2024-06-20 18:15:35,496 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 18:15:35,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:15:35,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:15:35,497 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 18:15:35,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:15:35,517 INFO L85 PathProgramCache]: Analyzing trace with hash 230814316, now seen corresponding path program 1 times [2024-06-20 18:15:35,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:15:35,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561589332] [2024-06-20 18:15:35,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:15:35,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:15:35,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:15:36,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:15:36,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:15:36,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561589332] [2024-06-20 18:15:36,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561589332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:15:36,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:15:36,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 18:15:36,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646927362] [2024-06-20 18:15:36,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:15:36,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 18:15:36,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:15:36,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 18:15:36,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 18:15:36,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-20 18:15:36,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 60 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:36,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:15:36,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-20 18:15:36,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:15:36,456 INFO L124 PetriNetUnfolderBase]: 322/536 cut-off events. [2024-06-20 18:15:36,456 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-06-20 18:15:36,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1051 conditions, 536 events. 322/536 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2105 event pairs, 53 based on Foata normal form. 21/506 useless extension candidates. Maximal degree in co-relation 1034. Up to 295 conditions per place. [2024-06-20 18:15:36,463 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 33 selfloop transitions, 8 changer transitions 12/56 dead transitions. [2024-06-20 18:15:36,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 56 transitions, 225 flow [2024-06-20 18:15:36,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 18:15:36,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 18:15:36,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-20 18:15:36,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6137931034482759 [2024-06-20 18:15:36,475 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 60 flow. Second operand 5 states and 89 transitions. [2024-06-20 18:15:36,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 56 transitions, 225 flow [2024-06-20 18:15:36,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 56 transitions, 222 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-20 18:15:36,480 INFO L231 Difference]: Finished difference. Result has 36 places, 27 transitions, 103 flow [2024-06-20 18:15:36,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=103, PETRI_PLACES=36, PETRI_TRANSITIONS=27} [2024-06-20 18:15:36,485 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 5 predicate places. [2024-06-20 18:15:36,486 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 27 transitions, 103 flow [2024-06-20 18:15:36,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:36,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:15:36,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:15:36,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 18:15:36,487 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 18:15:36,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:15:36,488 INFO L85 PathProgramCache]: Analyzing trace with hash -52698492, now seen corresponding path program 1 times [2024-06-20 18:15:36,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:15:36,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878555735] [2024-06-20 18:15:36,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:15:36,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:15:36,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:15:36,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:15:36,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:15:36,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878555735] [2024-06-20 18:15:36,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878555735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:15:36,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:15:36,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:15:36,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098655126] [2024-06-20 18:15:36,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:15:36,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:15:36,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:15:36,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:15:36,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:15:36,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-20 18:15:36,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 27 transitions, 103 flow. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:36,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:15:36,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-20 18:15:36,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:15:36,992 INFO L124 PetriNetUnfolderBase]: 160/298 cut-off events. [2024-06-20 18:15:36,993 INFO L125 PetriNetUnfolderBase]: For 116/116 co-relation queries the response was YES. [2024-06-20 18:15:36,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 786 conditions, 298 events. 160/298 cut-off events. For 116/116 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1096 event pairs, 13 based on Foata normal form. 10/308 useless extension candidates. Maximal degree in co-relation 762. Up to 115 conditions per place. [2024-06-20 18:15:36,999 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 41 selfloop transitions, 12 changer transitions 0/56 dead transitions. [2024-06-20 18:15:36,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 56 transitions, 289 flow [2024-06-20 18:15:37,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:15:37,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:15:37,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 98 transitions. [2024-06-20 18:15:37,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4827586206896552 [2024-06-20 18:15:37,005 INFO L175 Difference]: Start difference. First operand has 36 places, 27 transitions, 103 flow. Second operand 7 states and 98 transitions. [2024-06-20 18:15:37,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 56 transitions, 289 flow [2024-06-20 18:15:37,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 56 transitions, 289 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-20 18:15:37,013 INFO L231 Difference]: Finished difference. Result has 41 places, 31 transitions, 162 flow [2024-06-20 18:15:37,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=162, PETRI_PLACES=41, PETRI_TRANSITIONS=31} [2024-06-20 18:15:37,014 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 10 predicate places. [2024-06-20 18:15:37,014 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 31 transitions, 162 flow [2024-06-20 18:15:37,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:37,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:15:37,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:15:37,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 18:15:37,016 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 18:15:37,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:15:37,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1633652470, now seen corresponding path program 1 times [2024-06-20 18:15:37,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:15:37,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719894680] [2024-06-20 18:15:37,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:15:37,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:15:37,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:15:37,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:15:37,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:15:37,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719894680] [2024-06-20 18:15:37,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719894680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:15:37,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:15:37,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 18:15:37,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287860401] [2024-06-20 18:15:37,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:15:37,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 18:15:37,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:15:37,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 18:15:37,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-20 18:15:37,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-20 18:15:37,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 162 flow. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:37,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:15:37,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-20 18:15:37,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:15:37,498 INFO L124 PetriNetUnfolderBase]: 145/273 cut-off events. [2024-06-20 18:15:37,498 INFO L125 PetriNetUnfolderBase]: For 304/308 co-relation queries the response was YES. [2024-06-20 18:15:37,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 890 conditions, 273 events. 145/273 cut-off events. For 304/308 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 973 event pairs, 4 based on Foata normal form. 13/286 useless extension candidates. Maximal degree in co-relation 859. Up to 115 conditions per place. [2024-06-20 18:15:37,501 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 43 selfloop transitions, 13 changer transitions 0/59 dead transitions. [2024-06-20 18:15:37,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 59 transitions, 364 flow [2024-06-20 18:15:37,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 18:15:37,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 18:15:37,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 106 transitions. [2024-06-20 18:15:37,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45689655172413796 [2024-06-20 18:15:37,506 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 162 flow. Second operand 8 states and 106 transitions. [2024-06-20 18:15:37,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 59 transitions, 364 flow [2024-06-20 18:15:37,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 59 transitions, 344 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-20 18:15:37,513 INFO L231 Difference]: Finished difference. Result has 44 places, 31 transitions, 174 flow [2024-06-20 18:15:37,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=174, PETRI_PLACES=44, PETRI_TRANSITIONS=31} [2024-06-20 18:15:37,514 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 13 predicate places. [2024-06-20 18:15:37,514 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 31 transitions, 174 flow [2024-06-20 18:15:37,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:37,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:15:37,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:15:37,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 18:15:37,515 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 18:15:37,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:15:37,516 INFO L85 PathProgramCache]: Analyzing trace with hash -659881598, now seen corresponding path program 1 times [2024-06-20 18:15:37,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:15:37,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249346617] [2024-06-20 18:15:37,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:15:37,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:15:37,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:15:37,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:15:37,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:15:37,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249346617] [2024-06-20 18:15:37,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249346617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:15:37,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:15:37,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 18:15:37,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306607926] [2024-06-20 18:15:37,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:15:37,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 18:15:37,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:15:37,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 18:15:37,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-20 18:15:37,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-20 18:15:37,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 31 transitions, 174 flow. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:37,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:15:37,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-20 18:15:37,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:15:37,881 INFO L124 PetriNetUnfolderBase]: 169/315 cut-off events. [2024-06-20 18:15:37,881 INFO L125 PetriNetUnfolderBase]: For 449/449 co-relation queries the response was YES. [2024-06-20 18:15:37,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1086 conditions, 315 events. 169/315 cut-off events. For 449/449 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1131 event pairs, 37 based on Foata normal form. 3/317 useless extension candidates. Maximal degree in co-relation 1054. Up to 179 conditions per place. [2024-06-20 18:15:37,884 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 35 selfloop transitions, 11 changer transitions 0/49 dead transitions. [2024-06-20 18:15:37,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 49 transitions, 346 flow [2024-06-20 18:15:37,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 18:15:37,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 18:15:37,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 84 transitions. [2024-06-20 18:15:37,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41379310344827586 [2024-06-20 18:15:37,886 INFO L175 Difference]: Start difference. First operand has 44 places, 31 transitions, 174 flow. Second operand 7 states and 84 transitions. [2024-06-20 18:15:37,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 49 transitions, 346 flow [2024-06-20 18:15:37,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 49 transitions, 318 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-20 18:15:37,888 INFO L231 Difference]: Finished difference. Result has 47 places, 34 transitions, 205 flow [2024-06-20 18:15:37,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=205, PETRI_PLACES=47, PETRI_TRANSITIONS=34} [2024-06-20 18:15:37,889 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 16 predicate places. [2024-06-20 18:15:37,889 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 34 transitions, 205 flow [2024-06-20 18:15:37,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:37,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:15:37,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:15:37,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 18:15:37,890 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 18:15:37,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:15:37,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1018507759, now seen corresponding path program 1 times [2024-06-20 18:15:37,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:15:37,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292162187] [2024-06-20 18:15:37,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:15:37,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:15:37,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:15:38,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:15:38,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:15:38,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292162187] [2024-06-20 18:15:38,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292162187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:15:38,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:15:38,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 18:15:38,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422628102] [2024-06-20 18:15:38,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:15:38,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 18:15:38,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:15:38,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 18:15:38,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 18:15:38,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-20 18:15:38,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 34 transitions, 205 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:38,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:15:38,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-20 18:15:38,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:15:38,324 INFO L124 PetriNetUnfolderBase]: 151/288 cut-off events. [2024-06-20 18:15:38,324 INFO L125 PetriNetUnfolderBase]: For 507/507 co-relation queries the response was YES. [2024-06-20 18:15:38,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1026 conditions, 288 events. 151/288 cut-off events. For 507/507 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 997 event pairs, 31 based on Foata normal form. 9/296 useless extension candidates. Maximal degree in co-relation 990. Up to 176 conditions per place. [2024-06-20 18:15:38,327 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 32 selfloop transitions, 11 changer transitions 2/48 dead transitions. [2024-06-20 18:15:38,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 48 transitions, 347 flow [2024-06-20 18:15:38,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 18:15:38,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 18:15:38,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 89 transitions. [2024-06-20 18:15:38,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38362068965517243 [2024-06-20 18:15:38,329 INFO L175 Difference]: Start difference. First operand has 47 places, 34 transitions, 205 flow. Second operand 8 states and 89 transitions. [2024-06-20 18:15:38,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 48 transitions, 347 flow [2024-06-20 18:15:38,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 48 transitions, 334 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 18:15:38,332 INFO L231 Difference]: Finished difference. Result has 52 places, 34 transitions, 218 flow [2024-06-20 18:15:38,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=218, PETRI_PLACES=52, PETRI_TRANSITIONS=34} [2024-06-20 18:15:38,333 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 21 predicate places. [2024-06-20 18:15:38,333 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 34 transitions, 218 flow [2024-06-20 18:15:38,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:38,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:15:38,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:15:38,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 18:15:38,334 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 18:15:38,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:15:38,335 INFO L85 PathProgramCache]: Analyzing trace with hash -732814132, now seen corresponding path program 1 times [2024-06-20 18:15:38,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:15:38,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020879333] [2024-06-20 18:15:38,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:15:38,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:15:38,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:15:38,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:15:38,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:15:38,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020879333] [2024-06-20 18:15:38,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020879333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:15:38,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:15:38,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 18:15:38,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656807403] [2024-06-20 18:15:38,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:15:38,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 18:15:38,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:15:38,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 18:15:38,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-20 18:15:38,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-20 18:15:38,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 34 transitions, 218 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:38,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:15:38,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-20 18:15:38,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:15:38,802 INFO L124 PetriNetUnfolderBase]: 157/300 cut-off events. [2024-06-20 18:15:38,802 INFO L125 PetriNetUnfolderBase]: For 637/641 co-relation queries the response was YES. [2024-06-20 18:15:38,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1092 conditions, 300 events. 157/300 cut-off events. For 637/641 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1045 event pairs, 31 based on Foata normal form. 5/305 useless extension candidates. Maximal degree in co-relation 1054. Up to 168 conditions per place. [2024-06-20 18:15:38,805 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 38 selfloop transitions, 17 changer transitions 1/59 dead transitions. [2024-06-20 18:15:38,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 59 transitions, 419 flow [2024-06-20 18:15:38,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 18:15:38,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 18:15:38,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 106 transitions. [2024-06-20 18:15:38,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4061302681992337 [2024-06-20 18:15:38,807 INFO L175 Difference]: Start difference. First operand has 52 places, 34 transitions, 218 flow. Second operand 9 states and 106 transitions. [2024-06-20 18:15:38,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 59 transitions, 419 flow [2024-06-20 18:15:38,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 59 transitions, 391 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-20 18:15:38,811 INFO L231 Difference]: Finished difference. Result has 55 places, 39 transitions, 266 flow [2024-06-20 18:15:38,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=266, PETRI_PLACES=55, PETRI_TRANSITIONS=39} [2024-06-20 18:15:38,814 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 24 predicate places. [2024-06-20 18:15:38,815 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 39 transitions, 266 flow [2024-06-20 18:15:38,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:38,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:15:38,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:15:38,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 18:15:38,816 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 18:15:38,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:15:38,816 INFO L85 PathProgramCache]: Analyzing trace with hash -640220558, now seen corresponding path program 2 times [2024-06-20 18:15:38,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:15:38,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210522504] [2024-06-20 18:15:38,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:15:38,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:15:38,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:15:39,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:15:39,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:15:39,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210522504] [2024-06-20 18:15:39,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210522504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:15:39,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:15:39,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 18:15:39,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764591985] [2024-06-20 18:15:39,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:15:39,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 18:15:39,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:15:39,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 18:15:39,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 18:15:39,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-20 18:15:39,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 39 transitions, 266 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:39,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:15:39,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-20 18:15:39,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:15:39,270 INFO L124 PetriNetUnfolderBase]: 166/314 cut-off events. [2024-06-20 18:15:39,270 INFO L125 PetriNetUnfolderBase]: For 808/812 co-relation queries the response was YES. [2024-06-20 18:15:39,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1235 conditions, 314 events. 166/314 cut-off events. For 808/812 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1125 event pairs, 34 based on Foata normal form. 7/320 useless extension candidates. Maximal degree in co-relation 1196. Up to 192 conditions per place. [2024-06-20 18:15:39,273 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 38 selfloop transitions, 17 changer transitions 1/59 dead transitions. [2024-06-20 18:15:39,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 59 transitions, 482 flow [2024-06-20 18:15:39,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 18:15:39,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 18:15:39,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 100 transitions. [2024-06-20 18:15:39,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3831417624521073 [2024-06-20 18:15:39,275 INFO L175 Difference]: Start difference. First operand has 55 places, 39 transitions, 266 flow. Second operand 9 states and 100 transitions. [2024-06-20 18:15:39,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 59 transitions, 482 flow [2024-06-20 18:15:39,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 59 transitions, 441 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 18:15:39,279 INFO L231 Difference]: Finished difference. Result has 60 places, 46 transitions, 344 flow [2024-06-20 18:15:39,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=344, PETRI_PLACES=60, PETRI_TRANSITIONS=46} [2024-06-20 18:15:39,280 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 29 predicate places. [2024-06-20 18:15:39,280 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 46 transitions, 344 flow [2024-06-20 18:15:39,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:39,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:15:39,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:15:39,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 18:15:39,281 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 18:15:39,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:15:39,281 INFO L85 PathProgramCache]: Analyzing trace with hash -834086502, now seen corresponding path program 3 times [2024-06-20 18:15:39,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:15:39,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323443886] [2024-06-20 18:15:39,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:15:39,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:15:39,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:15:39,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:15:39,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:15:39,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323443886] [2024-06-20 18:15:39,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323443886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:15:39,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:15:39,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 18:15:39,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300960720] [2024-06-20 18:15:39,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:15:39,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 18:15:39,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:15:39,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 18:15:39,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-20 18:15:39,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-20 18:15:39,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 46 transitions, 344 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:39,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:15:39,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-20 18:15:39,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:15:39,759 INFO L124 PetriNetUnfolderBase]: 172/327 cut-off events. [2024-06-20 18:15:39,759 INFO L125 PetriNetUnfolderBase]: For 984/992 co-relation queries the response was YES. [2024-06-20 18:15:39,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1367 conditions, 327 events. 172/327 cut-off events. For 984/992 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1198 event pairs, 31 based on Foata normal form. 9/336 useless extension candidates. Maximal degree in co-relation 1325. Up to 199 conditions per place. [2024-06-20 18:15:39,762 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 44 selfloop transitions, 19 changer transitions 1/67 dead transitions. [2024-06-20 18:15:39,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 67 transitions, 562 flow [2024-06-20 18:15:39,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 18:15:39,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 18:15:39,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 102 transitions. [2024-06-20 18:15:39,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39080459770114945 [2024-06-20 18:15:39,764 INFO L175 Difference]: Start difference. First operand has 60 places, 46 transitions, 344 flow. Second operand 9 states and 102 transitions. [2024-06-20 18:15:39,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 67 transitions, 562 flow [2024-06-20 18:15:39,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 67 transitions, 535 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-20 18:15:39,769 INFO L231 Difference]: Finished difference. Result has 67 places, 51 transitions, 417 flow [2024-06-20 18:15:39,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=417, PETRI_PLACES=67, PETRI_TRANSITIONS=51} [2024-06-20 18:15:39,770 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 36 predicate places. [2024-06-20 18:15:39,770 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 51 transitions, 417 flow [2024-06-20 18:15:39,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:39,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:15:39,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:15:39,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 18:15:39,771 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 18:15:39,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:15:39,772 INFO L85 PathProgramCache]: Analyzing trace with hash -639625912, now seen corresponding path program 4 times [2024-06-20 18:15:39,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:15:39,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331886198] [2024-06-20 18:15:39,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:15:39,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:15:39,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:15:40,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:15:40,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:15:40,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331886198] [2024-06-20 18:15:40,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331886198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:15:40,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:15:40,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 18:15:40,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406220308] [2024-06-20 18:15:40,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:15:40,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 18:15:40,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:15:40,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 18:15:40,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 18:15:40,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-20 18:15:40,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 51 transitions, 417 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:40,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:15:40,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-20 18:15:40,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:15:40,188 INFO L124 PetriNetUnfolderBase]: 178/339 cut-off events. [2024-06-20 18:15:40,188 INFO L125 PetriNetUnfolderBase]: For 1234/1238 co-relation queries the response was YES. [2024-06-20 18:15:40,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1510 conditions, 339 events. 178/339 cut-off events. For 1234/1238 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1254 event pairs, 29 based on Foata normal form. 7/346 useless extension candidates. Maximal degree in co-relation 1464. Up to 209 conditions per place. [2024-06-20 18:15:40,191 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 48 selfloop transitions, 19 changer transitions 1/71 dead transitions. [2024-06-20 18:15:40,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 71 transitions, 647 flow [2024-06-20 18:15:40,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 18:15:40,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 18:15:40,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 103 transitions. [2024-06-20 18:15:40,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3946360153256705 [2024-06-20 18:15:40,193 INFO L175 Difference]: Start difference. First operand has 67 places, 51 transitions, 417 flow. Second operand 9 states and 103 transitions. [2024-06-20 18:15:40,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 71 transitions, 647 flow [2024-06-20 18:15:40,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 71 transitions, 605 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-20 18:15:40,200 INFO L231 Difference]: Finished difference. Result has 72 places, 55 transitions, 471 flow [2024-06-20 18:15:40,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=471, PETRI_PLACES=72, PETRI_TRANSITIONS=55} [2024-06-20 18:15:40,201 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 41 predicate places. [2024-06-20 18:15:40,201 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 55 transitions, 471 flow [2024-06-20 18:15:40,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:40,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:15:40,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:15:40,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 18:15:40,202 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 18:15:40,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:15:40,203 INFO L85 PathProgramCache]: Analyzing trace with hash -644982158, now seen corresponding path program 5 times [2024-06-20 18:15:40,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:15:40,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423651769] [2024-06-20 18:15:40,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:15:40,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:15:40,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:15:40,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:15:40,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:15:40,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423651769] [2024-06-20 18:15:40,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423651769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:15:40,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:15:40,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 18:15:40,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802046507] [2024-06-20 18:15:40,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:15:40,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 18:15:40,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:15:40,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 18:15:40,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-20 18:15:40,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-20 18:15:40,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 55 transitions, 471 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:40,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:15:40,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-20 18:15:40,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:15:40,631 INFO L124 PetriNetUnfolderBase]: 181/341 cut-off events. [2024-06-20 18:15:40,631 INFO L125 PetriNetUnfolderBase]: For 1490/1490 co-relation queries the response was YES. [2024-06-20 18:15:40,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1616 conditions, 341 events. 181/341 cut-off events. For 1490/1490 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1256 event pairs, 32 based on Foata normal form. 1/341 useless extension candidates. Maximal degree in co-relation 1568. Up to 211 conditions per place. [2024-06-20 18:15:40,634 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 47 selfloop transitions, 20 changer transitions 1/71 dead transitions. [2024-06-20 18:15:40,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 71 transitions, 687 flow [2024-06-20 18:15:40,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 18:15:40,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 18:15:40,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 99 transitions. [2024-06-20 18:15:40,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-06-20 18:15:40,636 INFO L175 Difference]: Start difference. First operand has 72 places, 55 transitions, 471 flow. Second operand 9 states and 99 transitions. [2024-06-20 18:15:40,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 71 transitions, 687 flow [2024-06-20 18:15:40,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 71 transitions, 647 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-20 18:15:40,642 INFO L231 Difference]: Finished difference. Result has 77 places, 58 transitions, 519 flow [2024-06-20 18:15:40,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=519, PETRI_PLACES=77, PETRI_TRANSITIONS=58} [2024-06-20 18:15:40,643 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 46 predicate places. [2024-06-20 18:15:40,643 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 58 transitions, 519 flow [2024-06-20 18:15:40,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:40,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:15:40,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:15:40,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 18:15:40,644 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 18:15:40,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:15:40,644 INFO L85 PathProgramCache]: Analyzing trace with hash -466836938, now seen corresponding path program 6 times [2024-06-20 18:15:40,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:15:40,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770813328] [2024-06-20 18:15:40,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:15:40,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:15:40,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:15:40,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:15:40,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:15:40,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770813328] [2024-06-20 18:15:40,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770813328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:15:40,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:15:40,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 18:15:40,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438898423] [2024-06-20 18:15:40,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:15:40,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 18:15:40,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:15:40,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 18:15:40,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-20 18:15:40,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-20 18:15:40,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 58 transitions, 519 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:40,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:15:40,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-20 18:15:40,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:15:41,050 INFO L124 PetriNetUnfolderBase]: 181/340 cut-off events. [2024-06-20 18:15:41,051 INFO L125 PetriNetUnfolderBase]: For 1750/1754 co-relation queries the response was YES. [2024-06-20 18:15:41,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1672 conditions, 340 events. 181/340 cut-off events. For 1750/1754 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1269 event pairs, 35 based on Foata normal form. 3/342 useless extension candidates. Maximal degree in co-relation 1621. Up to 219 conditions per place. [2024-06-20 18:15:41,054 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 49 selfloop transitions, 22 changer transitions 1/75 dead transitions. [2024-06-20 18:15:41,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 75 transitions, 755 flow [2024-06-20 18:15:41,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 18:15:41,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 18:15:41,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 101 transitions. [2024-06-20 18:15:41,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38697318007662834 [2024-06-20 18:15:41,056 INFO L175 Difference]: Start difference. First operand has 77 places, 58 transitions, 519 flow. Second operand 9 states and 101 transitions. [2024-06-20 18:15:41,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 75 transitions, 755 flow [2024-06-20 18:15:41,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 75 transitions, 699 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-20 18:15:41,062 INFO L231 Difference]: Finished difference. Result has 82 places, 62 transitions, 578 flow [2024-06-20 18:15:41,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=578, PETRI_PLACES=82, PETRI_TRANSITIONS=62} [2024-06-20 18:15:41,063 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 51 predicate places. [2024-06-20 18:15:41,063 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 62 transitions, 578 flow [2024-06-20 18:15:41,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:41,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:15:41,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:15:41,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 18:15:41,064 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 18:15:41,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:15:41,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1467999858, now seen corresponding path program 1 times [2024-06-20 18:15:41,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:15:41,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512516351] [2024-06-20 18:15:41,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:15:41,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:15:41,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:15:41,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:15:41,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:15:41,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512516351] [2024-06-20 18:15:41,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512516351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:15:41,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:15:41,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:15:41,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160699074] [2024-06-20 18:15:41,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:15:41,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:15:41,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:15:41,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:15:41,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:15:41,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-20 18:15:41,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 62 transitions, 578 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:41,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:15:41,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-20 18:15:41,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:15:41,572 INFO L124 PetriNetUnfolderBase]: 199/376 cut-off events. [2024-06-20 18:15:41,572 INFO L125 PetriNetUnfolderBase]: For 2368/2372 co-relation queries the response was YES. [2024-06-20 18:15:41,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1946 conditions, 376 events. 199/376 cut-off events. For 2368/2372 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1478 event pairs, 11 based on Foata normal form. 7/383 useless extension candidates. Maximal degree in co-relation 1892. Up to 157 conditions per place. [2024-06-20 18:15:41,576 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 63 selfloop transitions, 26 changer transitions 1/93 dead transitions. [2024-06-20 18:15:41,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 93 transitions, 952 flow [2024-06-20 18:15:41,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:15:41,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:15:41,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 121 transitions. [2024-06-20 18:15:41,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41724137931034483 [2024-06-20 18:15:41,578 INFO L175 Difference]: Start difference. First operand has 82 places, 62 transitions, 578 flow. Second operand 10 states and 121 transitions. [2024-06-20 18:15:41,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 93 transitions, 952 flow [2024-06-20 18:15:41,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 93 transitions, 869 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-20 18:15:41,589 INFO L231 Difference]: Finished difference. Result has 84 places, 64 transitions, 579 flow [2024-06-20 18:15:41,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=579, PETRI_PLACES=84, PETRI_TRANSITIONS=64} [2024-06-20 18:15:41,590 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 53 predicate places. [2024-06-20 18:15:41,590 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 64 transitions, 579 flow [2024-06-20 18:15:41,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:41,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:15:41,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:15:41,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 18:15:41,591 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 18:15:41,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:15:41,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1992088830, now seen corresponding path program 2 times [2024-06-20 18:15:41,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:15:41,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706670661] [2024-06-20 18:15:41,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:15:41,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:15:41,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:15:41,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:15:41,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:15:41,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706670661] [2024-06-20 18:15:41,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706670661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:15:41,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:15:41,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:15:41,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502409629] [2024-06-20 18:15:41,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:15:41,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:15:41,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:15:41,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:15:41,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:15:41,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-20 18:15:41,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 64 transitions, 579 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:41,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:15:41,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-20 18:15:41,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:15:42,104 INFO L124 PetriNetUnfolderBase]: 217/410 cut-off events. [2024-06-20 18:15:42,104 INFO L125 PetriNetUnfolderBase]: For 2951/2955 co-relation queries the response was YES. [2024-06-20 18:15:42,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2170 conditions, 410 events. 217/410 cut-off events. For 2951/2955 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1701 event pairs, 30 based on Foata normal form. 7/417 useless extension candidates. Maximal degree in co-relation 2117. Up to 238 conditions per place. [2024-06-20 18:15:42,108 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 63 selfloop transitions, 25 changer transitions 1/92 dead transitions. [2024-06-20 18:15:42,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 92 transitions, 921 flow [2024-06-20 18:15:42,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:15:42,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:15:42,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2024-06-20 18:15:42,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4103448275862069 [2024-06-20 18:15:42,111 INFO L175 Difference]: Start difference. First operand has 84 places, 64 transitions, 579 flow. Second operand 10 states and 119 transitions. [2024-06-20 18:15:42,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 92 transitions, 921 flow [2024-06-20 18:15:42,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 92 transitions, 854 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-20 18:15:42,121 INFO L231 Difference]: Finished difference. Result has 86 places, 66 transitions, 602 flow [2024-06-20 18:15:42,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=514, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=602, PETRI_PLACES=86, PETRI_TRANSITIONS=66} [2024-06-20 18:15:42,122 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 55 predicate places. [2024-06-20 18:15:42,122 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 66 transitions, 602 flow [2024-06-20 18:15:42,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:42,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:15:42,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:15:42,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 18:15:42,123 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 18:15:42,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:15:42,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1992085110, now seen corresponding path program 3 times [2024-06-20 18:15:42,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:15:42,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288030804] [2024-06-20 18:15:42,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:15:42,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:15:42,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:15:42,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:15:42,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:15:42,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288030804] [2024-06-20 18:15:42,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288030804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:15:42,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:15:42,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:15:42,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790737363] [2024-06-20 18:15:42,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:15:42,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:15:42,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:15:42,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:15:42,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:15:42,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-20 18:15:42,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 66 transitions, 602 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:42,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:15:42,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-20 18:15:42,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:15:42,691 INFO L124 PetriNetUnfolderBase]: 226/425 cut-off events. [2024-06-20 18:15:42,691 INFO L125 PetriNetUnfolderBase]: For 3312/3316 co-relation queries the response was YES. [2024-06-20 18:15:42,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2287 conditions, 425 events. 226/425 cut-off events. For 3312/3316 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1753 event pairs, 38 based on Foata normal form. 7/432 useless extension candidates. Maximal degree in co-relation 2234. Up to 265 conditions per place. [2024-06-20 18:15:42,696 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 60 selfloop transitions, 26 changer transitions 1/90 dead transitions. [2024-06-20 18:15:42,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 90 transitions, 897 flow [2024-06-20 18:15:42,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:15:42,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:15:42,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 117 transitions. [2024-06-20 18:15:42,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40344827586206894 [2024-06-20 18:15:42,697 INFO L175 Difference]: Start difference. First operand has 86 places, 66 transitions, 602 flow. Second operand 10 states and 117 transitions. [2024-06-20 18:15:42,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 90 transitions, 897 flow [2024-06-20 18:15:42,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 90 transitions, 849 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-20 18:15:42,708 INFO L231 Difference]: Finished difference. Result has 89 places, 67 transitions, 633 flow [2024-06-20 18:15:42,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=554, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=633, PETRI_PLACES=89, PETRI_TRANSITIONS=67} [2024-06-20 18:15:42,709 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 58 predicate places. [2024-06-20 18:15:42,709 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 67 transitions, 633 flow [2024-06-20 18:15:42,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:42,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:15:42,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:15:42,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 18:15:42,710 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 18:15:42,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:15:42,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1992084955, now seen corresponding path program 1 times [2024-06-20 18:15:42,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:15:42,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504498252] [2024-06-20 18:15:42,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:15:42,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:15:42,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:15:42,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:15:42,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:15:42,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504498252] [2024-06-20 18:15:42,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504498252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:15:42,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:15:42,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:15:42,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145053098] [2024-06-20 18:15:42,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:15:42,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:15:42,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:15:42,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:15:42,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:15:43,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-20 18:15:43,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 67 transitions, 633 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:43,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:15:43,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-20 18:15:43,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:15:43,204 INFO L124 PetriNetUnfolderBase]: 235/444 cut-off events. [2024-06-20 18:15:43,205 INFO L125 PetriNetUnfolderBase]: For 3796/3796 co-relation queries the response was YES. [2024-06-20 18:15:43,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2403 conditions, 444 events. 235/444 cut-off events. For 3796/3796 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1880 event pairs, 34 based on Foata normal form. 3/447 useless extension candidates. Maximal degree in co-relation 2349. Up to 280 conditions per place. [2024-06-20 18:15:43,209 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 61 selfloop transitions, 26 changer transitions 1/91 dead transitions. [2024-06-20 18:15:43,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 91 transitions, 909 flow [2024-06-20 18:15:43,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:15:43,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:15:43,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 117 transitions. [2024-06-20 18:15:43,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40344827586206894 [2024-06-20 18:15:43,211 INFO L175 Difference]: Start difference. First operand has 89 places, 67 transitions, 633 flow. Second operand 10 states and 117 transitions. [2024-06-20 18:15:43,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 91 transitions, 909 flow [2024-06-20 18:15:43,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 91 transitions, 855 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-20 18:15:43,220 INFO L231 Difference]: Finished difference. Result has 91 places, 68 transitions, 653 flow [2024-06-20 18:15:43,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=579, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=653, PETRI_PLACES=91, PETRI_TRANSITIONS=68} [2024-06-20 18:15:43,221 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 60 predicate places. [2024-06-20 18:15:43,221 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 68 transitions, 653 flow [2024-06-20 18:15:43,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:43,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:15:43,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:15:43,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 18:15:43,222 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 18:15:43,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:15:43,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1498824425, now seen corresponding path program 2 times [2024-06-20 18:15:43,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:15:43,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549484138] [2024-06-20 18:15:43,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:15:43,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:15:43,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:15:43,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:15:43,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:15:43,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549484138] [2024-06-20 18:15:43,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549484138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:15:43,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:15:43,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:15:43,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415876770] [2024-06-20 18:15:43,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:15:43,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:15:43,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:15:43,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:15:43,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:15:43,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-20 18:15:43,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 68 transitions, 653 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:43,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:15:43,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-20 18:15:43,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:15:43,749 INFO L124 PetriNetUnfolderBase]: 244/459 cut-off events. [2024-06-20 18:15:43,749 INFO L125 PetriNetUnfolderBase]: For 4098/4098 co-relation queries the response was YES. [2024-06-20 18:15:43,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2531 conditions, 459 events. 244/459 cut-off events. For 4098/4098 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1947 event pairs, 38 based on Foata normal form. 3/462 useless extension candidates. Maximal degree in co-relation 2476. Up to 310 conditions per place. [2024-06-20 18:15:43,754 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 64 selfloop transitions, 21 changer transitions 1/89 dead transitions. [2024-06-20 18:15:43,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 89 transitions, 919 flow [2024-06-20 18:15:43,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:15:43,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:15:43,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-06-20 18:15:43,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3896551724137931 [2024-06-20 18:15:43,756 INFO L175 Difference]: Start difference. First operand has 91 places, 68 transitions, 653 flow. Second operand 10 states and 113 transitions. [2024-06-20 18:15:43,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 89 transitions, 919 flow [2024-06-20 18:15:43,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 89 transitions, 857 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-20 18:15:43,766 INFO L231 Difference]: Finished difference. Result has 93 places, 69 transitions, 657 flow [2024-06-20 18:15:43,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=657, PETRI_PLACES=93, PETRI_TRANSITIONS=69} [2024-06-20 18:15:43,766 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 62 predicate places. [2024-06-20 18:15:43,767 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 69 transitions, 657 flow [2024-06-20 18:15:43,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:43,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:15:43,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:15:43,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 18:15:43,767 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 18:15:43,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:15:43,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1640029890, now seen corresponding path program 4 times [2024-06-20 18:15:43,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:15:43,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718896427] [2024-06-20 18:15:43,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:15:43,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:15:43,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:15:44,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:15:44,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:15:44,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718896427] [2024-06-20 18:15:44,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718896427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:15:44,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:15:44,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:15:44,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62332301] [2024-06-20 18:15:44,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:15:44,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:15:44,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:15:44,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:15:44,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:15:44,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-20 18:15:44,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 69 transitions, 657 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:44,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:15:44,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-20 18:15:44,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:15:44,282 INFO L124 PetriNetUnfolderBase]: 262/491 cut-off events. [2024-06-20 18:15:44,283 INFO L125 PetriNetUnfolderBase]: For 4948/4952 co-relation queries the response was YES. [2024-06-20 18:15:44,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2754 conditions, 491 events. 262/491 cut-off events. For 4948/4952 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2140 event pairs, 32 based on Foata normal form. 7/498 useless extension candidates. Maximal degree in co-relation 2698. Up to 328 conditions per place. [2024-06-20 18:15:44,288 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 70 selfloop transitions, 20 changer transitions 1/94 dead transitions. [2024-06-20 18:15:44,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 94 transitions, 1007 flow [2024-06-20 18:15:44,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:15:44,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:15:44,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2024-06-20 18:15:44,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39655172413793105 [2024-06-20 18:15:44,290 INFO L175 Difference]: Start difference. First operand has 93 places, 69 transitions, 657 flow. Second operand 10 states and 115 transitions. [2024-06-20 18:15:44,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 94 transitions, 1007 flow [2024-06-20 18:15:44,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 94 transitions, 953 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-20 18:15:44,303 INFO L231 Difference]: Finished difference. Result has 96 places, 71 transitions, 687 flow [2024-06-20 18:15:44,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=603, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=687, PETRI_PLACES=96, PETRI_TRANSITIONS=71} [2024-06-20 18:15:44,303 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 65 predicate places. [2024-06-20 18:15:44,303 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 71 transitions, 687 flow [2024-06-20 18:15:44,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:44,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:15:44,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:15:44,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 18:15:44,304 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 18:15:44,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:15:44,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1498824270, now seen corresponding path program 5 times [2024-06-20 18:15:44,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:15:44,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290012854] [2024-06-20 18:15:44,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:15:44,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:15:44,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:15:44,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:15:44,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:15:44,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290012854] [2024-06-20 18:15:44,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290012854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:15:44,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:15:44,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:15:44,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326753040] [2024-06-20 18:15:44,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:15:44,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:15:44,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:15:44,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:15:44,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:15:44,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-20 18:15:44,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 71 transitions, 687 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:44,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:15:44,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-20 18:15:44,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:15:44,830 INFO L124 PetriNetUnfolderBase]: 271/508 cut-off events. [2024-06-20 18:15:44,830 INFO L125 PetriNetUnfolderBase]: For 5670/5674 co-relation queries the response was YES. [2024-06-20 18:15:44,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2893 conditions, 508 events. 271/508 cut-off events. For 5670/5674 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2250 event pairs, 36 based on Foata normal form. 7/515 useless extension candidates. Maximal degree in co-relation 2835. Up to 355 conditions per place. [2024-06-20 18:15:44,835 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 67 selfloop transitions, 21 changer transitions 1/92 dead transitions. [2024-06-20 18:15:44,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 92 transitions, 986 flow [2024-06-20 18:15:44,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:15:44,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:15:44,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-06-20 18:15:44,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3896551724137931 [2024-06-20 18:15:44,836 INFO L175 Difference]: Start difference. First operand has 96 places, 71 transitions, 687 flow. Second operand 10 states and 113 transitions. [2024-06-20 18:15:44,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 92 transitions, 986 flow [2024-06-20 18:15:44,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 92 transitions, 942 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-20 18:15:44,849 INFO L231 Difference]: Finished difference. Result has 99 places, 72 transitions, 716 flow [2024-06-20 18:15:44,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=643, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=716, PETRI_PLACES=99, PETRI_TRANSITIONS=72} [2024-06-20 18:15:44,850 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 68 predicate places. [2024-06-20 18:15:44,850 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 72 transitions, 716 flow [2024-06-20 18:15:44,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:44,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:15:44,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:15:44,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 18:15:44,851 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 18:15:44,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:15:44,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1646670245, now seen corresponding path program 3 times [2024-06-20 18:15:44,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:15:44,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283181077] [2024-06-20 18:15:44,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:15:44,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:15:44,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:15:45,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:15:45,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:15:45,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283181077] [2024-06-20 18:15:45,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283181077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:15:45,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:15:45,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:15:45,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828928271] [2024-06-20 18:15:45,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:15:45,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:15:45,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:15:45,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:15:45,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:15:45,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-20 18:15:45,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 72 transitions, 716 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:45,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:15:45,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-20 18:15:45,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:15:45,341 INFO L124 PetriNetUnfolderBase]: 289/542 cut-off events. [2024-06-20 18:15:45,341 INFO L125 PetriNetUnfolderBase]: For 6153/6157 co-relation queries the response was YES. [2024-06-20 18:15:45,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3069 conditions, 542 events. 289/542 cut-off events. For 6153/6157 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2473 event pairs, 38 based on Foata normal form. 13/555 useless extension candidates. Maximal degree in co-relation 3010. Up to 378 conditions per place. [2024-06-20 18:15:45,346 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 74 selfloop transitions, 19 changer transitions 1/97 dead transitions. [2024-06-20 18:15:45,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 97 transitions, 1027 flow [2024-06-20 18:15:45,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:15:45,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:15:45,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 116 transitions. [2024-06-20 18:15:45,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 18:15:45,348 INFO L175 Difference]: Start difference. First operand has 99 places, 72 transitions, 716 flow. Second operand 10 states and 116 transitions. [2024-06-20 18:15:45,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 97 transitions, 1027 flow [2024-06-20 18:15:45,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 97 transitions, 977 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-20 18:15:45,363 INFO L231 Difference]: Finished difference. Result has 102 places, 74 transitions, 743 flow [2024-06-20 18:15:45,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=668, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=743, PETRI_PLACES=102, PETRI_TRANSITIONS=74} [2024-06-20 18:15:45,363 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 71 predicate places. [2024-06-20 18:15:45,364 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 74 transitions, 743 flow [2024-06-20 18:15:45,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:45,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:15:45,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:15:45,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 18:15:45,364 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 18:15:45,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:15:45,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1646433870, now seen corresponding path program 6 times [2024-06-20 18:15:45,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:15:45,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475842174] [2024-06-20 18:15:45,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:15:45,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:15:45,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:15:45,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:15:45,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:15:45,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475842174] [2024-06-20 18:15:45,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475842174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:15:45,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:15:45,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:15:45,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313466463] [2024-06-20 18:15:45,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:15:45,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:15:45,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:15:45,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:15:45,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:15:45,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-20 18:15:45,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 74 transitions, 743 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:45,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:15:45,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-20 18:15:45,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:15:45,883 INFO L124 PetriNetUnfolderBase]: 298/559 cut-off events. [2024-06-20 18:15:45,884 INFO L125 PetriNetUnfolderBase]: For 7239/7243 co-relation queries the response was YES. [2024-06-20 18:15:45,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3289 conditions, 559 events. 298/559 cut-off events. For 7239/7243 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2591 event pairs, 38 based on Foata normal form. 7/566 useless extension candidates. Maximal degree in co-relation 3228. Up to 394 conditions per place. [2024-06-20 18:15:45,889 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 70 selfloop transitions, 21 changer transitions 1/95 dead transitions. [2024-06-20 18:15:45,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 95 transitions, 1056 flow [2024-06-20 18:15:45,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:15:45,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:15:45,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-06-20 18:15:45,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3896551724137931 [2024-06-20 18:15:45,891 INFO L175 Difference]: Start difference. First operand has 102 places, 74 transitions, 743 flow. Second operand 10 states and 113 transitions. [2024-06-20 18:15:45,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 95 transitions, 1056 flow [2024-06-20 18:15:45,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 95 transitions, 1013 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-20 18:15:45,908 INFO L231 Difference]: Finished difference. Result has 106 places, 75 transitions, 775 flow [2024-06-20 18:15:45,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=700, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=775, PETRI_PLACES=106, PETRI_TRANSITIONS=75} [2024-06-20 18:15:45,909 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 75 predicate places. [2024-06-20 18:15:45,909 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 75 transitions, 775 flow [2024-06-20 18:15:45,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:45,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:15:45,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:15:45,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 18:15:45,910 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 18:15:45,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:15:45,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1933848355, now seen corresponding path program 4 times [2024-06-20 18:15:45,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:15:45,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128692968] [2024-06-20 18:15:45,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:15:45,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:15:45,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:15:46,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:15:46,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:15:46,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128692968] [2024-06-20 18:15:46,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128692968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:15:46,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:15:46,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:15:46,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954043467] [2024-06-20 18:15:46,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:15:46,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:15:46,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:15:46,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:15:46,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:15:46,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-20 18:15:46,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 75 transitions, 775 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:46,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:15:46,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-20 18:15:46,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:15:46,369 INFO L124 PetriNetUnfolderBase]: 307/574 cut-off events. [2024-06-20 18:15:46,370 INFO L125 PetriNetUnfolderBase]: For 7631/7631 co-relation queries the response was YES. [2024-06-20 18:15:46,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3388 conditions, 574 events. 307/574 cut-off events. For 7631/7631 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 2662 event pairs, 36 based on Foata normal form. 3/577 useless extension candidates. Maximal degree in co-relation 3325. Up to 409 conditions per place. [2024-06-20 18:15:46,376 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 71 selfloop transitions, 21 changer transitions 1/96 dead transitions. [2024-06-20 18:15:46,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 96 transitions, 1061 flow [2024-06-20 18:15:46,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:15:46,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:15:46,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-06-20 18:15:46,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3896551724137931 [2024-06-20 18:15:46,378 INFO L175 Difference]: Start difference. First operand has 106 places, 75 transitions, 775 flow. Second operand 10 states and 113 transitions. [2024-06-20 18:15:46,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 96 transitions, 1061 flow [2024-06-20 18:15:46,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 96 transitions, 1011 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-20 18:15:46,397 INFO L231 Difference]: Finished difference. Result has 108 places, 76 transitions, 795 flow [2024-06-20 18:15:46,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=725, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=795, PETRI_PLACES=108, PETRI_TRANSITIONS=76} [2024-06-20 18:15:46,398 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 77 predicate places. [2024-06-20 18:15:46,398 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 76 transitions, 795 flow [2024-06-20 18:15:46,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:46,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:15:46,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:15:46,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 18:15:46,399 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 18:15:46,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:15:46,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1808451193, now seen corresponding path program 5 times [2024-06-20 18:15:46,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:15:46,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901095701] [2024-06-20 18:15:46,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:15:46,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:15:46,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:15:46,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:15:46,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:15:46,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901095701] [2024-06-20 18:15:46,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901095701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:15:46,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:15:46,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:15:46,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148672109] [2024-06-20 18:15:46,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:15:46,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:15:46,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:15:46,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:15:46,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:15:46,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-20 18:15:46,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 76 transitions, 795 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:46,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:15:46,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-20 18:15:46,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:15:46,918 INFO L124 PetriNetUnfolderBase]: 325/606 cut-off events. [2024-06-20 18:15:46,919 INFO L125 PetriNetUnfolderBase]: For 8497/8497 co-relation queries the response was YES. [2024-06-20 18:15:46,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3592 conditions, 606 events. 325/606 cut-off events. For 8497/8497 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 2873 event pairs, 45 based on Foata normal form. 9/614 useless extension candidates. Maximal degree in co-relation 3528. Up to 429 conditions per place. [2024-06-20 18:15:46,926 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 74 selfloop transitions, 20 changer transitions 1/98 dead transitions. [2024-06-20 18:15:46,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 98 transitions, 1107 flow [2024-06-20 18:15:46,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:15:46,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:15:46,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-06-20 18:15:46,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3896551724137931 [2024-06-20 18:15:46,928 INFO L175 Difference]: Start difference. First operand has 108 places, 76 transitions, 795 flow. Second operand 10 states and 113 transitions. [2024-06-20 18:15:46,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 98 transitions, 1107 flow [2024-06-20 18:15:46,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 98 transitions, 1047 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-20 18:15:46,948 INFO L231 Difference]: Finished difference. Result has 111 places, 78 transitions, 819 flow [2024-06-20 18:15:46,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=737, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=819, PETRI_PLACES=111, PETRI_TRANSITIONS=78} [2024-06-20 18:15:46,948 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 80 predicate places. [2024-06-20 18:15:46,949 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 78 transitions, 819 flow [2024-06-20 18:15:46,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:46,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:15:46,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:15:46,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 18:15:46,949 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 18:15:46,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:15:46,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1808687413, now seen corresponding path program 6 times [2024-06-20 18:15:46,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:15:46,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606338213] [2024-06-20 18:15:46,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:15:46,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:15:46,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:15:47,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:15:47,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:15:47,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606338213] [2024-06-20 18:15:47,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606338213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:15:47,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:15:47,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:15:47,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393157678] [2024-06-20 18:15:47,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:15:47,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:15:47,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:15:47,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:15:47,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:15:47,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-20 18:15:47,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 78 transitions, 819 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:47,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:15:47,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-20 18:15:47,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:15:47,509 INFO L124 PetriNetUnfolderBase]: 334/623 cut-off events. [2024-06-20 18:15:47,510 INFO L125 PetriNetUnfolderBase]: For 9449/9449 co-relation queries the response was YES. [2024-06-20 18:15:47,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3755 conditions, 623 events. 334/623 cut-off events. For 9449/9449 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 2991 event pairs, 45 based on Foata normal form. 3/625 useless extension candidates. Maximal degree in co-relation 3689. Up to 445 conditions per place. [2024-06-20 18:15:47,515 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 70 selfloop transitions, 22 changer transitions 1/96 dead transitions. [2024-06-20 18:15:47,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 96 transitions, 1103 flow [2024-06-20 18:15:47,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:15:47,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:15:47,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-20 18:15:47,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-06-20 18:15:47,517 INFO L175 Difference]: Start difference. First operand has 111 places, 78 transitions, 819 flow. Second operand 10 states and 110 transitions. [2024-06-20 18:15:47,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 96 transitions, 1103 flow [2024-06-20 18:15:47,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 96 transitions, 1055 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-20 18:15:47,539 INFO L231 Difference]: Finished difference. Result has 115 places, 79 transitions, 847 flow [2024-06-20 18:15:47,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=847, PETRI_PLACES=115, PETRI_TRANSITIONS=79} [2024-06-20 18:15:47,539 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 84 predicate places. [2024-06-20 18:15:47,540 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 79 transitions, 847 flow [2024-06-20 18:15:47,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:47,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:15:47,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:15:47,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 18:15:47,540 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 18:15:47,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:15:47,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1808687568, now seen corresponding path program 7 times [2024-06-20 18:15:47,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:15:47,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255076258] [2024-06-20 18:15:47,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:15:47,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:15:47,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:15:47,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:15:47,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:15:47,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255076258] [2024-06-20 18:15:47,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255076258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:15:47,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:15:47,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:15:47,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88327332] [2024-06-20 18:15:47,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:15:47,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:15:47,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:15:47,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:15:47,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:15:47,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-20 18:15:47,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 79 transitions, 847 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:47,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:15:47,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-20 18:15:47,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:15:48,070 INFO L124 PetriNetUnfolderBase]: 343/638 cut-off events. [2024-06-20 18:15:48,071 INFO L125 PetriNetUnfolderBase]: For 10520/10524 co-relation queries the response was YES. [2024-06-20 18:15:48,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3926 conditions, 638 events. 343/638 cut-off events. For 10520/10524 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3058 event pairs, 49 based on Foata normal form. 7/644 useless extension candidates. Maximal degree in co-relation 3858. Up to 460 conditions per place. [2024-06-20 18:15:48,078 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 71 selfloop transitions, 22 changer transitions 1/97 dead transitions. [2024-06-20 18:15:48,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 97 transitions, 1168 flow [2024-06-20 18:15:48,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:15:48,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:15:48,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-20 18:15:48,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-06-20 18:15:48,080 INFO L175 Difference]: Start difference. First operand has 115 places, 79 transitions, 847 flow. Second operand 10 states and 110 transitions. [2024-06-20 18:15:48,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 97 transitions, 1168 flow [2024-06-20 18:15:48,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 97 transitions, 1104 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-20 18:15:48,102 INFO L231 Difference]: Finished difference. Result has 117 places, 80 transitions, 862 flow [2024-06-20 18:15:48,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=783, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=862, PETRI_PLACES=117, PETRI_TRANSITIONS=80} [2024-06-20 18:15:48,102 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 86 predicate places. [2024-06-20 18:15:48,102 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 80 transitions, 862 flow [2024-06-20 18:15:48,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:48,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:15:48,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:15:48,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 18:15:48,103 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 18:15:48,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:15:48,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1480328864, now seen corresponding path program 8 times [2024-06-20 18:15:48,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:15:48,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318579517] [2024-06-20 18:15:48,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:15:48,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:15:48,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:15:48,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:15:48,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:15:48,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318579517] [2024-06-20 18:15:48,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318579517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:15:48,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:15:48,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:15:48,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334349329] [2024-06-20 18:15:48,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:15:48,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:15:48,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:15:48,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:15:48,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:15:48,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-20 18:15:48,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 80 transitions, 862 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:48,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:15:48,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-20 18:15:48,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:15:48,682 INFO L124 PetriNetUnfolderBase]: 352/655 cut-off events. [2024-06-20 18:15:48,682 INFO L125 PetriNetUnfolderBase]: For 11310/11314 co-relation queries the response was YES. [2024-06-20 18:15:48,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4056 conditions, 655 events. 352/655 cut-off events. For 11310/11314 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3164 event pairs, 45 based on Foata normal form. 7/661 useless extension candidates. Maximal degree in co-relation 3987. Up to 460 conditions per place. [2024-06-20 18:15:48,689 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 75 selfloop transitions, 22 changer transitions 1/101 dead transitions. [2024-06-20 18:15:48,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 101 transitions, 1243 flow [2024-06-20 18:15:48,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:15:48,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:15:48,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 112 transitions. [2024-06-20 18:15:48,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38620689655172413 [2024-06-20 18:15:48,690 INFO L175 Difference]: Start difference. First operand has 117 places, 80 transitions, 862 flow. Second operand 10 states and 112 transitions. [2024-06-20 18:15:48,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 101 transitions, 1243 flow [2024-06-20 18:15:48,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 101 transitions, 1189 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-20 18:15:48,716 INFO L231 Difference]: Finished difference. Result has 119 places, 81 transitions, 889 flow [2024-06-20 18:15:48,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=808, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=889, PETRI_PLACES=119, PETRI_TRANSITIONS=81} [2024-06-20 18:15:48,716 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 88 predicate places. [2024-06-20 18:15:48,716 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 81 transitions, 889 flow [2024-06-20 18:15:48,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:48,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:15:48,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:15:48,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 18:15:48,717 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 18:15:48,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:15:48,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1480390399, now seen corresponding path program 7 times [2024-06-20 18:15:48,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:15:48,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196892622] [2024-06-20 18:15:48,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:15:48,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:15:48,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:15:49,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:15:49,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:15:49,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196892622] [2024-06-20 18:15:49,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196892622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:15:49,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:15:49,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:15:49,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521951730] [2024-06-20 18:15:49,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:15:49,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:15:49,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:15:49,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:15:49,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:15:49,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-20 18:15:49,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 81 transitions, 889 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:49,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:15:49,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-20 18:15:49,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:15:49,245 INFO L124 PetriNetUnfolderBase]: 361/670 cut-off events. [2024-06-20 18:15:49,246 INFO L125 PetriNetUnfolderBase]: For 11956/11960 co-relation queries the response was YES. [2024-06-20 18:15:49,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4174 conditions, 670 events. 361/670 cut-off events. For 11956/11960 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 3266 event pairs, 47 based on Foata normal form. 7/676 useless extension candidates. Maximal degree in co-relation 4104. Up to 487 conditions per place. [2024-06-20 18:15:49,255 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 72 selfloop transitions, 23 changer transitions 1/99 dead transitions. [2024-06-20 18:15:49,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 99 transitions, 1181 flow [2024-06-20 18:15:49,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:15:49,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:15:49,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-20 18:15:49,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-06-20 18:15:49,257 INFO L175 Difference]: Start difference. First operand has 119 places, 81 transitions, 889 flow. Second operand 10 states and 110 transitions. [2024-06-20 18:15:49,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 99 transitions, 1181 flow [2024-06-20 18:15:49,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 99 transitions, 1119 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-20 18:15:49,285 INFO L231 Difference]: Finished difference. Result has 120 places, 82 transitions, 907 flow [2024-06-20 18:15:49,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=827, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=907, PETRI_PLACES=120, PETRI_TRANSITIONS=82} [2024-06-20 18:15:49,286 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 89 predicate places. [2024-06-20 18:15:49,286 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 82 transitions, 907 flow [2024-06-20 18:15:49,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:49,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:15:49,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:15:49,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 18:15:49,287 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 18:15:49,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:15:49,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1815087828, now seen corresponding path program 9 times [2024-06-20 18:15:49,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:15:49,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601163380] [2024-06-20 18:15:49,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:15:49,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:15:49,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:15:49,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:15:49,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:15:49,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601163380] [2024-06-20 18:15:49,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601163380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:15:49,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:15:49,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:15:49,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127348457] [2024-06-20 18:15:49,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:15:49,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:15:49,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:15:49,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:15:49,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:15:49,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-20 18:15:49,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 82 transitions, 907 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:49,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:15:49,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-20 18:15:49,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:15:49,785 INFO L124 PetriNetUnfolderBase]: 370/687 cut-off events. [2024-06-20 18:15:49,785 INFO L125 PetriNetUnfolderBase]: For 13355/13355 co-relation queries the response was YES. [2024-06-20 18:15:49,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4346 conditions, 687 events. 370/687 cut-off events. For 13355/13355 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3386 event pairs, 47 based on Foata normal form. 3/689 useless extension candidates. Maximal degree in co-relation 4277. Up to 502 conditions per place. [2024-06-20 18:15:49,791 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 73 selfloop transitions, 23 changer transitions 1/100 dead transitions. [2024-06-20 18:15:49,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 100 transitions, 1240 flow [2024-06-20 18:15:49,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:15:49,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:15:49,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-20 18:15:49,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-06-20 18:15:49,793 INFO L175 Difference]: Start difference. First operand has 120 places, 82 transitions, 907 flow. Second operand 10 states and 110 transitions. [2024-06-20 18:15:49,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 100 transitions, 1240 flow [2024-06-20 18:15:49,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 100 transitions, 1172 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-20 18:15:49,820 INFO L231 Difference]: Finished difference. Result has 122 places, 83 transitions, 924 flow [2024-06-20 18:15:49,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=839, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=924, PETRI_PLACES=122, PETRI_TRANSITIONS=83} [2024-06-20 18:15:49,821 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 91 predicate places. [2024-06-20 18:15:49,821 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 83 transitions, 924 flow [2024-06-20 18:15:49,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:49,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:15:49,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:15:49,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 18:15:49,822 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 18:15:49,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:15:49,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1578762583, now seen corresponding path program 8 times [2024-06-20 18:15:49,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:15:49,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072844340] [2024-06-20 18:15:49,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:15:49,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:15:49,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:15:50,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:15:50,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:15:50,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072844340] [2024-06-20 18:15:50,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072844340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:15:50,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:15:50,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:15:50,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308521591] [2024-06-20 18:15:50,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:15:50,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:15:50,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:15:50,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:15:50,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:15:50,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-20 18:15:50,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 83 transitions, 924 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:50,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:15:50,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-20 18:15:50,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:15:50,361 INFO L124 PetriNetUnfolderBase]: 388/721 cut-off events. [2024-06-20 18:15:50,361 INFO L125 PetriNetUnfolderBase]: For 13987/13987 co-relation queries the response was YES. [2024-06-20 18:15:50,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4500 conditions, 721 events. 388/721 cut-off events. For 13987/13987 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 3616 event pairs, 43 based on Foata normal form. 9/729 useless extension candidates. Maximal degree in co-relation 4430. Up to 525 conditions per place. [2024-06-20 18:15:50,365 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 76 selfloop transitions, 24 changer transitions 1/104 dead transitions. [2024-06-20 18:15:50,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 104 transitions, 1255 flow [2024-06-20 18:15:50,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:15:50,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:15:50,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 111 transitions. [2024-06-20 18:15:50,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38275862068965516 [2024-06-20 18:15:50,367 INFO L175 Difference]: Start difference. First operand has 122 places, 83 transitions, 924 flow. Second operand 10 states and 111 transitions. [2024-06-20 18:15:50,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 104 transitions, 1255 flow [2024-06-20 18:15:50,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 104 transitions, 1193 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-20 18:15:50,399 INFO L231 Difference]: Finished difference. Result has 125 places, 85 transitions, 961 flow [2024-06-20 18:15:50,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=864, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=961, PETRI_PLACES=125, PETRI_TRANSITIONS=85} [2024-06-20 18:15:50,403 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 94 predicate places. [2024-06-20 18:15:50,403 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 85 transitions, 961 flow [2024-06-20 18:15:50,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:50,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:15:50,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:15:50,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 18:15:50,404 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 18:15:50,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:15:50,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1586806153, now seen corresponding path program 9 times [2024-06-20 18:15:50,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:15:50,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403259264] [2024-06-20 18:15:50,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:15:50,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:15:50,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:15:50,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:15:50,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:15:50,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403259264] [2024-06-20 18:15:50,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403259264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:15:50,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:15:50,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:15:50,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341056579] [2024-06-20 18:15:50,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:15:50,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:15:50,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:15:50,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:15:50,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:15:50,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-20 18:15:50,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 85 transitions, 961 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:50,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:15:50,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-20 18:15:50,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:15:50,862 INFO L124 PetriNetUnfolderBase]: 388/723 cut-off events. [2024-06-20 18:15:50,862 INFO L125 PetriNetUnfolderBase]: For 15345/15349 co-relation queries the response was YES. [2024-06-20 18:15:50,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4626 conditions, 723 events. 388/723 cut-off events. For 15345/15349 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 3626 event pairs, 45 based on Foata normal form. 9/731 useless extension candidates. Maximal degree in co-relation 4554. Up to 540 conditions per place. [2024-06-20 18:15:50,868 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 78 selfloop transitions, 24 changer transitions 0/105 dead transitions. [2024-06-20 18:15:50,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 105 transitions, 1273 flow [2024-06-20 18:15:50,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:15:50,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:15:50,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-06-20 18:15:50,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3896551724137931 [2024-06-20 18:15:50,870 INFO L175 Difference]: Start difference. First operand has 125 places, 85 transitions, 961 flow. Second operand 10 states and 113 transitions. [2024-06-20 18:15:50,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 105 transitions, 1273 flow [2024-06-20 18:15:50,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 105 transitions, 1186 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-20 18:15:50,902 INFO L231 Difference]: Finished difference. Result has 127 places, 86 transitions, 964 flow [2024-06-20 18:15:50,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=874, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=964, PETRI_PLACES=127, PETRI_TRANSITIONS=86} [2024-06-20 18:15:50,905 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 96 predicate places. [2024-06-20 18:15:50,905 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 86 transitions, 964 flow [2024-06-20 18:15:50,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:50,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:15:50,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:15:50,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 18:15:50,905 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 18:15:50,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:15:50,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1587042373, now seen corresponding path program 10 times [2024-06-20 18:15:50,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:15:50,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081937894] [2024-06-20 18:15:50,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:15:50,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:15:50,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:15:51,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:15:51,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:15:51,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081937894] [2024-06-20 18:15:51,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081937894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:15:51,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:15:51,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:15:51,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342965607] [2024-06-20 18:15:51,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:15:51,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:15:51,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:15:51,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:15:51,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:15:51,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-20 18:15:51,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 86 transitions, 964 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:51,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:15:51,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-20 18:15:51,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:15:51,386 INFO L124 PetriNetUnfolderBase]: 397/738 cut-off events. [2024-06-20 18:15:51,387 INFO L125 PetriNetUnfolderBase]: For 16408/16412 co-relation queries the response was YES. [2024-06-20 18:15:51,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4771 conditions, 738 events. 397/738 cut-off events. For 16408/16412 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 3699 event pairs, 54 based on Foata normal form. 3/740 useless extension candidates. Maximal degree in co-relation 4699. Up to 556 conditions per place. [2024-06-20 18:15:51,392 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 74 selfloop transitions, 26 changer transitions 0/103 dead transitions. [2024-06-20 18:15:51,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 103 transitions, 1256 flow [2024-06-20 18:15:51,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:15:51,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:15:51,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-20 18:15:51,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-06-20 18:15:51,393 INFO L175 Difference]: Start difference. First operand has 127 places, 86 transitions, 964 flow. Second operand 10 states and 110 transitions. [2024-06-20 18:15:51,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 103 transitions, 1256 flow [2024-06-20 18:15:51,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 103 transitions, 1166 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-20 18:15:51,426 INFO L231 Difference]: Finished difference. Result has 128 places, 87 transitions, 966 flow [2024-06-20 18:15:51,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=874, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=966, PETRI_PLACES=128, PETRI_TRANSITIONS=87} [2024-06-20 18:15:51,426 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 97 predicate places. [2024-06-20 18:15:51,426 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 87 transitions, 966 flow [2024-06-20 18:15:51,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:51,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:15:51,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:15:51,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 18:15:51,427 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 18:15:51,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:15:51,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1587042528, now seen corresponding path program 10 times [2024-06-20 18:15:51,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:15:51,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342069008] [2024-06-20 18:15:51,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:15:51,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:15:51,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:15:51,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:15:51,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:15:51,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342069008] [2024-06-20 18:15:51,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342069008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:15:51,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:15:51,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 18:15:51,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253396760] [2024-06-20 18:15:51,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:15:51,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 18:15:51,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:15:51,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 18:15:51,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-20 18:15:51,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-20 18:15:51,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 87 transitions, 966 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:51,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:15:51,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-20 18:15:51,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:15:51,871 INFO L124 PetriNetUnfolderBase]: 391/729 cut-off events. [2024-06-20 18:15:51,871 INFO L125 PetriNetUnfolderBase]: For 15414/15418 co-relation queries the response was YES. [2024-06-20 18:15:51,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4564 conditions, 729 events. 391/729 cut-off events. For 15414/15418 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 3662 event pairs, 52 based on Foata normal form. 3/731 useless extension candidates. Maximal degree in co-relation 4493. Up to 547 conditions per place. [2024-06-20 18:15:51,877 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 74 selfloop transitions, 26 changer transitions 0/103 dead transitions. [2024-06-20 18:15:51,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 103 transitions, 1268 flow [2024-06-20 18:15:51,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 18:15:51,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 18:15:51,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-20 18:15:51,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-06-20 18:15:51,879 INFO L175 Difference]: Start difference. First operand has 128 places, 87 transitions, 966 flow. Second operand 10 states and 110 transitions. [2024-06-20 18:15:51,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 103 transitions, 1268 flow [2024-06-20 18:15:51,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 103 transitions, 1188 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-20 18:15:51,906 INFO L231 Difference]: Finished difference. Result has 130 places, 87 transitions, 942 flow [2024-06-20 18:15:51,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=886, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=942, PETRI_PLACES=130, PETRI_TRANSITIONS=87} [2024-06-20 18:15:51,906 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 99 predicate places. [2024-06-20 18:15:51,906 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 87 transitions, 942 flow [2024-06-20 18:15:51,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:51,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:15:51,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:15:51,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 18:15:51,907 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 18:15:51,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:15:51,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1736643841, now seen corresponding path program 1 times [2024-06-20 18:15:51,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:15:51,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880873084] [2024-06-20 18:15:51,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:15:51,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:15:51,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:15:52,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:15:52,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:15:52,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880873084] [2024-06-20 18:15:52,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880873084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:15:52,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:15:52,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 18:15:52,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5675016] [2024-06-20 18:15:52,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:15:52,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 18:15:52,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:15:52,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 18:15:52,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-20 18:15:52,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-20 18:15:52,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 87 transitions, 942 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:52,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:15:52,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-20 18:15:52,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:15:52,501 INFO L124 PetriNetUnfolderBase]: 418/784 cut-off events. [2024-06-20 18:15:52,501 INFO L125 PetriNetUnfolderBase]: For 18074/18078 co-relation queries the response was YES. [2024-06-20 18:15:52,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4796 conditions, 784 events. 418/784 cut-off events. For 18074/18078 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 3996 event pairs, 11 based on Foata normal form. 13/797 useless extension candidates. Maximal degree in co-relation 4724. Up to 442 conditions per place. [2024-06-20 18:15:52,507 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 70 selfloop transitions, 27 changer transitions 22/122 dead transitions. [2024-06-20 18:15:52,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 122 transitions, 1504 flow [2024-06-20 18:15:52,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 18:15:52,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 18:15:52,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 133 transitions. [2024-06-20 18:15:52,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4169278996865204 [2024-06-20 18:15:52,509 INFO L175 Difference]: Start difference. First operand has 130 places, 87 transitions, 942 flow. Second operand 11 states and 133 transitions. [2024-06-20 18:15:52,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 122 transitions, 1504 flow [2024-06-20 18:15:52,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 122 transitions, 1408 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-20 18:15:52,546 INFO L231 Difference]: Finished difference. Result has 132 places, 83 transitions, 860 flow [2024-06-20 18:15:52,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=846, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=860, PETRI_PLACES=132, PETRI_TRANSITIONS=83} [2024-06-20 18:15:52,547 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 101 predicate places. [2024-06-20 18:15:52,547 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 83 transitions, 860 flow [2024-06-20 18:15:52,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:52,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:15:52,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:15:52,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 18:15:52,548 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 18:15:52,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:15:52,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1626998229, now seen corresponding path program 2 times [2024-06-20 18:15:52,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:15:52,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892476134] [2024-06-20 18:15:52,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:15:52,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:15:52,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:15:52,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:15:52,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:15:52,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892476134] [2024-06-20 18:15:52,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892476134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:15:52,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:15:52,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 18:15:52,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208381811] [2024-06-20 18:15:52,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:15:52,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 18:15:52,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:15:52,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 18:15:52,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-20 18:15:52,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-20 18:15:52,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 83 transitions, 860 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:52,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:15:52,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-20 18:15:52,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:15:53,104 INFO L124 PetriNetUnfolderBase]: 377/705 cut-off events. [2024-06-20 18:15:53,104 INFO L125 PetriNetUnfolderBase]: For 16016/16020 co-relation queries the response was YES. [2024-06-20 18:15:53,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4221 conditions, 705 events. 377/705 cut-off events. For 16016/16020 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 3524 event pairs, 37 based on Foata normal form. 13/718 useless extension candidates. Maximal degree in co-relation 4149. Up to 443 conditions per place. [2024-06-20 18:15:53,109 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 67 selfloop transitions, 24 changer transitions 18/112 dead transitions. [2024-06-20 18:15:53,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 112 transitions, 1332 flow [2024-06-20 18:15:53,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 18:15:53,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 18:15:53,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 127 transitions. [2024-06-20 18:15:53,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3981191222570533 [2024-06-20 18:15:53,111 INFO L175 Difference]: Start difference. First operand has 132 places, 83 transitions, 860 flow. Second operand 11 states and 127 transitions. [2024-06-20 18:15:53,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 112 transitions, 1332 flow [2024-06-20 18:15:53,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 112 transitions, 1262 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-20 18:15:53,134 INFO L231 Difference]: Finished difference. Result has 126 places, 80 transitions, 806 flow [2024-06-20 18:15:53,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=790, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=806, PETRI_PLACES=126, PETRI_TRANSITIONS=80} [2024-06-20 18:15:53,135 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 95 predicate places. [2024-06-20 18:15:53,135 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 80 transitions, 806 flow [2024-06-20 18:15:53,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:53,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:15:53,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:15:53,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 18:15:53,136 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 18:15:53,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:15:53,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1625095449, now seen corresponding path program 3 times [2024-06-20 18:15:53,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:15:53,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397718243] [2024-06-20 18:15:53,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:15:53,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:15:53,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:15:53,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:15:53,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:15:53,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397718243] [2024-06-20 18:15:53,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397718243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:15:53,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:15:53,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 18:15:53,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751332896] [2024-06-20 18:15:53,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:15:53,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 18:15:53,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:15:53,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 18:15:53,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-20 18:15:53,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-20 18:15:53,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 80 transitions, 806 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:53,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:15:53,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-20 18:15:53,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:15:53,662 INFO L124 PetriNetUnfolderBase]: 357/669 cut-off events. [2024-06-20 18:15:53,663 INFO L125 PetriNetUnfolderBase]: For 15334/15334 co-relation queries the response was YES. [2024-06-20 18:15:53,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3915 conditions, 669 events. 357/669 cut-off events. For 15334/15334 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 3325 event pairs, 37 based on Foata normal form. 9/678 useless extension candidates. Maximal degree in co-relation 3846. Up to 423 conditions per place. [2024-06-20 18:15:53,668 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 65 selfloop transitions, 25 changer transitions 13/106 dead transitions. [2024-06-20 18:15:53,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 106 transitions, 1204 flow [2024-06-20 18:15:53,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 18:15:53,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 18:15:53,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 124 transitions. [2024-06-20 18:15:53,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3887147335423197 [2024-06-20 18:15:53,669 INFO L175 Difference]: Start difference. First operand has 126 places, 80 transitions, 806 flow. Second operand 11 states and 124 transitions. [2024-06-20 18:15:53,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 106 transitions, 1204 flow [2024-06-20 18:15:53,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 106 transitions, 1152 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-20 18:15:53,689 INFO L231 Difference]: Finished difference. Result has 123 places, 78 transitions, 782 flow [2024-06-20 18:15:53,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=782, PETRI_PLACES=123, PETRI_TRANSITIONS=78} [2024-06-20 18:15:53,690 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 92 predicate places. [2024-06-20 18:15:53,690 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 78 transitions, 782 flow [2024-06-20 18:15:53,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:53,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:15:53,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:15:53,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 18:15:53,691 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 18:15:53,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:15:53,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1625090799, now seen corresponding path program 4 times [2024-06-20 18:15:53,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:15:53,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650394491] [2024-06-20 18:15:53,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:15:53,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:15:53,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:15:53,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:15:53,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:15:53,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650394491] [2024-06-20 18:15:53,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650394491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:15:53,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:15:53,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 18:15:53,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802732917] [2024-06-20 18:15:53,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:15:53,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 18:15:53,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:15:53,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 18:15:53,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-20 18:15:54,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-20 18:15:54,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 78 transitions, 782 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:54,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:15:54,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-20 18:15:54,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:15:54,207 INFO L124 PetriNetUnfolderBase]: 346/652 cut-off events. [2024-06-20 18:15:54,208 INFO L125 PetriNetUnfolderBase]: For 14321/14325 co-relation queries the response was YES. [2024-06-20 18:15:54,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3759 conditions, 652 events. 346/652 cut-off events. For 14321/14325 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3204 event pairs, 37 based on Foata normal form. 13/665 useless extension candidates. Maximal degree in co-relation 3691. Up to 406 conditions per place. [2024-06-20 18:15:54,213 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 59 selfloop transitions, 21 changer transitions 21/104 dead transitions. [2024-06-20 18:15:54,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 104 transitions, 1132 flow [2024-06-20 18:15:54,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 18:15:54,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 18:15:54,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-20 18:15:54,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38557993730407525 [2024-06-20 18:15:54,214 INFO L175 Difference]: Start difference. First operand has 123 places, 78 transitions, 782 flow. Second operand 11 states and 123 transitions. [2024-06-20 18:15:54,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 104 transitions, 1132 flow [2024-06-20 18:15:54,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 104 transitions, 1078 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 18:15:54,241 INFO L231 Difference]: Finished difference. Result has 121 places, 73 transitions, 738 flow [2024-06-20 18:15:54,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=728, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=738, PETRI_PLACES=121, PETRI_TRANSITIONS=73} [2024-06-20 18:15:54,241 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 90 predicate places. [2024-06-20 18:15:54,241 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 73 transitions, 738 flow [2024-06-20 18:15:54,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:54,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:15:54,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:15:54,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 18:15:54,242 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 18:15:54,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:15:54,243 INFO L85 PathProgramCache]: Analyzing trace with hash -782989849, now seen corresponding path program 5 times [2024-06-20 18:15:54,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:15:54,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130321529] [2024-06-20 18:15:54,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:15:54,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:15:54,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:15:54,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:15:54,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:15:54,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130321529] [2024-06-20 18:15:54,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130321529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:15:54,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:15:54,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 18:15:54,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919176007] [2024-06-20 18:15:54,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:15:54,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 18:15:54,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:15:54,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 18:15:54,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-20 18:15:54,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-20 18:15:54,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 73 transitions, 738 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:54,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:15:54,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-20 18:15:54,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:15:54,729 INFO L124 PetriNetUnfolderBase]: 329/616 cut-off events. [2024-06-20 18:15:54,729 INFO L125 PetriNetUnfolderBase]: For 13009/13013 co-relation queries the response was YES. [2024-06-20 18:15:54,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3610 conditions, 616 events. 329/616 cut-off events. For 13009/13013 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 2982 event pairs, 33 based on Foata normal form. 13/629 useless extension candidates. Maximal degree in co-relation 3543. Up to 377 conditions per place. [2024-06-20 18:15:54,732 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 59 selfloop transitions, 19 changer transitions 18/99 dead transitions. [2024-06-20 18:15:54,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 99 transitions, 1176 flow [2024-06-20 18:15:54,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 18:15:54,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 18:15:54,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-20 18:15:54,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38557993730407525 [2024-06-20 18:15:54,737 INFO L175 Difference]: Start difference. First operand has 121 places, 73 transitions, 738 flow. Second operand 11 states and 123 transitions. [2024-06-20 18:15:54,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 99 transitions, 1176 flow [2024-06-20 18:15:54,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 99 transitions, 1089 flow, removed 18 selfloop flow, removed 11 redundant places. [2024-06-20 18:15:54,758 INFO L231 Difference]: Finished difference. Result has 114 places, 70 transitions, 671 flow [2024-06-20 18:15:54,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=663, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=671, PETRI_PLACES=114, PETRI_TRANSITIONS=70} [2024-06-20 18:15:54,758 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 83 predicate places. [2024-06-20 18:15:54,758 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 70 transitions, 671 flow [2024-06-20 18:15:54,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:54,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:15:54,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:15:54,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 18:15:54,759 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 18:15:54,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:15:54,760 INFO L85 PathProgramCache]: Analyzing trace with hash -781087069, now seen corresponding path program 6 times [2024-06-20 18:15:54,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:15:54,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493405199] [2024-06-20 18:15:54,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:15:54,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:15:54,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:15:55,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:15:55,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:15:55,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493405199] [2024-06-20 18:15:55,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493405199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:15:55,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:15:55,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 18:15:55,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789956791] [2024-06-20 18:15:55,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:15:55,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 18:15:55,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:15:55,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 18:15:55,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-20 18:15:55,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-20 18:15:55,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 70 transitions, 671 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:55,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:15:55,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-20 18:15:55,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:15:55,288 INFO L124 PetriNetUnfolderBase]: 309/580 cut-off events. [2024-06-20 18:15:55,288 INFO L125 PetriNetUnfolderBase]: For 11019/11019 co-relation queries the response was YES. [2024-06-20 18:15:55,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3225 conditions, 580 events. 309/580 cut-off events. For 11019/11019 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 2773 event pairs, 33 based on Foata normal form. 9/589 useless extension candidates. Maximal degree in co-relation 3161. Up to 357 conditions per place. [2024-06-20 18:15:55,292 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 57 selfloop transitions, 20 changer transitions 13/93 dead transitions. [2024-06-20 18:15:55,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 93 transitions, 1027 flow [2024-06-20 18:15:55,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 18:15:55,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 18:15:55,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 120 transitions. [2024-06-20 18:15:55,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3761755485893417 [2024-06-20 18:15:55,294 INFO L175 Difference]: Start difference. First operand has 114 places, 70 transitions, 671 flow. Second operand 11 states and 120 transitions. [2024-06-20 18:15:55,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 93 transitions, 1027 flow [2024-06-20 18:15:55,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 93 transitions, 985 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-20 18:15:55,313 INFO L231 Difference]: Finished difference. Result has 111 places, 68 transitions, 649 flow [2024-06-20 18:15:55,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=629, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=649, PETRI_PLACES=111, PETRI_TRANSITIONS=68} [2024-06-20 18:15:55,314 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 80 predicate places. [2024-06-20 18:15:55,314 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 68 transitions, 649 flow [2024-06-20 18:15:55,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:55,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:15:55,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:15:55,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 18:15:55,314 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 18:15:55,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:15:55,315 INFO L85 PathProgramCache]: Analyzing trace with hash -698560175, now seen corresponding path program 7 times [2024-06-20 18:15:55,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:15:55,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585532164] [2024-06-20 18:15:55,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:15:55,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:15:55,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:15:55,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:15:55,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:15:55,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585532164] [2024-06-20 18:15:55,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585532164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:15:55,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:15:55,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 18:15:55,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615422072] [2024-06-20 18:15:55,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:15:55,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 18:15:55,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:15:55,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 18:15:55,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-20 18:15:55,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-20 18:15:55,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 68 transitions, 649 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:55,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:15:55,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-20 18:15:55,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:15:55,820 INFO L124 PetriNetUnfolderBase]: 298/563 cut-off events. [2024-06-20 18:15:55,820 INFO L125 PetriNetUnfolderBase]: For 10686/10686 co-relation queries the response was YES. [2024-06-20 18:15:55,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3079 conditions, 563 events. 298/563 cut-off events. For 10686/10686 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 2681 event pairs, 15 based on Foata normal form. 9/572 useless extension candidates. Maximal degree in co-relation 3016. Up to 340 conditions per place. [2024-06-20 18:15:55,823 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 54 selfloop transitions, 17 changer transitions 17/91 dead transitions. [2024-06-20 18:15:55,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 91 transitions, 961 flow [2024-06-20 18:15:55,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 18:15:55,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 18:15:55,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 119 transitions. [2024-06-20 18:15:55,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3730407523510972 [2024-06-20 18:15:55,825 INFO L175 Difference]: Start difference. First operand has 111 places, 68 transitions, 649 flow. Second operand 11 states and 119 transitions. [2024-06-20 18:15:55,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 91 transitions, 961 flow [2024-06-20 18:15:55,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 91 transitions, 917 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 18:15:55,848 INFO L231 Difference]: Finished difference. Result has 109 places, 64 transitions, 611 flow [2024-06-20 18:15:55,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=605, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=611, PETRI_PLACES=109, PETRI_TRANSITIONS=64} [2024-06-20 18:15:55,848 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 78 predicate places. [2024-06-20 18:15:55,849 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 64 transitions, 611 flow [2024-06-20 18:15:55,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:55,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:15:55,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:15:55,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 18:15:55,849 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 18:15:55,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:15:55,850 INFO L85 PathProgramCache]: Analyzing trace with hash -492829295, now seen corresponding path program 8 times [2024-06-20 18:15:55,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:15:55,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19456257] [2024-06-20 18:15:55,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:15:55,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:15:55,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:15:56,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:15:56,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:15:56,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19456257] [2024-06-20 18:15:56,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19456257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:15:56,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:15:56,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 18:15:56,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744210672] [2024-06-20 18:15:56,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:15:56,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 18:15:56,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:15:56,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 18:15:56,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-20 18:15:56,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-20 18:15:56,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 64 transitions, 611 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:56,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:15:56,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-20 18:15:56,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:15:56,338 INFO L124 PetriNetUnfolderBase]: 285/538 cut-off events. [2024-06-20 18:15:56,339 INFO L125 PetriNetUnfolderBase]: For 9720/9724 co-relation queries the response was YES. [2024-06-20 18:15:56,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2971 conditions, 538 events. 285/538 cut-off events. For 9720/9724 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 2518 event pairs, 33 based on Foata normal form. 13/551 useless extension candidates. Maximal degree in co-relation 2909. Up to 319 conditions per place. [2024-06-20 18:15:56,343 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 53 selfloop transitions, 16 changer transitions 18/90 dead transitions. [2024-06-20 18:15:56,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 90 transitions, 939 flow [2024-06-20 18:15:56,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 18:15:56,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 18:15:56,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 122 transitions. [2024-06-20 18:15:56,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3824451410658307 [2024-06-20 18:15:56,346 INFO L175 Difference]: Start difference. First operand has 109 places, 64 transitions, 611 flow. Second operand 11 states and 122 transitions. [2024-06-20 18:15:56,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 90 transitions, 939 flow [2024-06-20 18:15:56,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 90 transitions, 881 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-20 18:15:56,364 INFO L231 Difference]: Finished difference. Result has 104 places, 61 transitions, 561 flow [2024-06-20 18:15:56,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=557, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=561, PETRI_PLACES=104, PETRI_TRANSITIONS=61} [2024-06-20 18:15:56,366 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 73 predicate places. [2024-06-20 18:15:56,366 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 61 transitions, 561 flow [2024-06-20 18:15:56,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:56,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:15:56,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:15:56,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 18:15:56,366 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 18:15:56,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:15:56,367 INFO L85 PathProgramCache]: Analyzing trace with hash -500156765, now seen corresponding path program 9 times [2024-06-20 18:15:56,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:15:56,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146142455] [2024-06-20 18:15:56,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:15:56,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:15:56,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:15:56,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:15:56,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:15:56,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146142455] [2024-06-20 18:15:56,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146142455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:15:56,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:15:56,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 18:15:56,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392844156] [2024-06-20 18:15:56,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:15:56,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 18:15:56,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:15:56,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 18:15:56,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-20 18:15:56,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-20 18:15:56,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 61 transitions, 561 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:56,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:15:56,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-20 18:15:56,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:15:56,883 INFO L124 PetriNetUnfolderBase]: 265/502 cut-off events. [2024-06-20 18:15:56,883 INFO L125 PetriNetUnfolderBase]: For 8119/8119 co-relation queries the response was YES. [2024-06-20 18:15:56,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2715 conditions, 502 events. 265/502 cut-off events. For 8119/8119 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 2312 event pairs, 33 based on Foata normal form. 9/511 useless extension candidates. Maximal degree in co-relation 2655. Up to 299 conditions per place. [2024-06-20 18:15:56,886 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 51 selfloop transitions, 17 changer transitions 13/84 dead transitions. [2024-06-20 18:15:56,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 84 transitions, 891 flow [2024-06-20 18:15:56,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 18:15:56,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 18:15:56,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 119 transitions. [2024-06-20 18:15:56,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3730407523510972 [2024-06-20 18:15:56,887 INFO L175 Difference]: Start difference. First operand has 104 places, 61 transitions, 561 flow. Second operand 11 states and 119 transitions. [2024-06-20 18:15:56,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 84 transitions, 891 flow [2024-06-20 18:15:56,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 84 transitions, 843 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-20 18:15:56,896 INFO L231 Difference]: Finished difference. Result has 100 places, 59 transitions, 537 flow [2024-06-20 18:15:56,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=537, PETRI_PLACES=100, PETRI_TRANSITIONS=59} [2024-06-20 18:15:56,897 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 69 predicate places. [2024-06-20 18:15:56,897 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 59 transitions, 537 flow [2024-06-20 18:15:56,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:56,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:15:56,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:15:56,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 18:15:56,897 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 18:15:56,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:15:56,898 INFO L85 PathProgramCache]: Analyzing trace with hash -500152115, now seen corresponding path program 10 times [2024-06-20 18:15:56,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:15:56,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568344080] [2024-06-20 18:15:56,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:15:56,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:15:56,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:15:57,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:15:57,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:15:57,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568344080] [2024-06-20 18:15:57,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568344080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:15:57,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:15:57,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 18:15:57,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094953135] [2024-06-20 18:15:57,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:15:57,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 18:15:57,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:15:57,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 18:15:57,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-20 18:15:57,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-20 18:15:57,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 59 transitions, 537 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:57,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:15:57,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-20 18:15:57,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:15:57,327 INFO L124 PetriNetUnfolderBase]: 254/485 cut-off events. [2024-06-20 18:15:57,327 INFO L125 PetriNetUnfolderBase]: For 7368/7372 co-relation queries the response was YES. [2024-06-20 18:15:57,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2528 conditions, 485 events. 254/485 cut-off events. For 7368/7372 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2198 event pairs, 15 based on Foata normal form. 13/498 useless extension candidates. Maximal degree in co-relation 2470. Up to 282 conditions per place. [2024-06-20 18:15:57,329 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 44 selfloop transitions, 12 changer transitions 23/82 dead transitions. [2024-06-20 18:15:57,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 82 transitions, 823 flow [2024-06-20 18:15:57,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 18:15:57,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 18:15:57,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 118 transitions. [2024-06-20 18:15:57,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36990595611285265 [2024-06-20 18:15:57,330 INFO L175 Difference]: Start difference. First operand has 100 places, 59 transitions, 537 flow. Second operand 11 states and 118 transitions. [2024-06-20 18:15:57,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 82 transitions, 823 flow [2024-06-20 18:15:57,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 82 transitions, 785 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 18:15:57,340 INFO L231 Difference]: Finished difference. Result has 98 places, 53 transitions, 474 flow [2024-06-20 18:15:57,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=499, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=474, PETRI_PLACES=98, PETRI_TRANSITIONS=53} [2024-06-20 18:15:57,341 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 67 predicate places. [2024-06-20 18:15:57,341 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 53 transitions, 474 flow [2024-06-20 18:15:57,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:57,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:15:57,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:15:57,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 18:15:57,342 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 18:15:57,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:15:57,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1064284101, now seen corresponding path program 11 times [2024-06-20 18:15:57,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:15:57,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987059244] [2024-06-20 18:15:57,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:15:57,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:15:57,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:15:57,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:15:57,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:15:57,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987059244] [2024-06-20 18:15:57,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987059244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:15:57,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:15:57,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 18:15:57,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683478631] [2024-06-20 18:15:57,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:15:57,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 18:15:57,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:15:57,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 18:15:57,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-20 18:15:57,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-20 18:15:57,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 53 transitions, 474 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:57,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:15:57,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-20 18:15:57,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:15:57,798 INFO L124 PetriNetUnfolderBase]: 236/441 cut-off events. [2024-06-20 18:15:57,799 INFO L125 PetriNetUnfolderBase]: For 6492/6496 co-relation queries the response was YES. [2024-06-20 18:15:57,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2358 conditions, 441 events. 236/441 cut-off events. For 6492/6496 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 1941 event pairs, 32 based on Foata normal form. 13/454 useless extension candidates. Maximal degree in co-relation 2301. Up to 261 conditions per place. [2024-06-20 18:15:57,801 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 43 selfloop transitions, 12 changer transitions 18/76 dead transitions. [2024-06-20 18:15:57,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 76 transitions, 758 flow [2024-06-20 18:15:57,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 18:15:57,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 18:15:57,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 117 transitions. [2024-06-20 18:15:57,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3667711598746082 [2024-06-20 18:15:57,809 INFO L175 Difference]: Start difference. First operand has 98 places, 53 transitions, 474 flow. Second operand 11 states and 117 transitions. [2024-06-20 18:15:57,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 76 transitions, 758 flow [2024-06-20 18:15:57,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 76 transitions, 692 flow, removed 15 selfloop flow, removed 13 redundant places. [2024-06-20 18:15:57,818 INFO L231 Difference]: Finished difference. Result has 87 places, 50 transitions, 410 flow [2024-06-20 18:15:57,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=410, PETRI_PLACES=87, PETRI_TRANSITIONS=50} [2024-06-20 18:15:57,820 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 56 predicate places. [2024-06-20 18:15:57,821 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 50 transitions, 410 flow [2024-06-20 18:15:57,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:57,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:15:57,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:15:57,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 18:15:57,826 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 18:15:57,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:15:57,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1071611571, now seen corresponding path program 12 times [2024-06-20 18:15:57,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:15:57,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025013669] [2024-06-20 18:15:57,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:15:57,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:15:57,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:15:58,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:15:58,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:15:58,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025013669] [2024-06-20 18:15:58,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025013669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:15:58,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:15:58,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 18:15:58,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949685663] [2024-06-20 18:15:58,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:15:58,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 18:15:58,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:15:58,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 18:15:58,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-20 18:15:58,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-20 18:15:58,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 50 transitions, 410 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:58,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:15:58,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-20 18:15:58,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:15:58,309 INFO L124 PetriNetUnfolderBase]: 216/407 cut-off events. [2024-06-20 18:15:58,309 INFO L125 PetriNetUnfolderBase]: For 5037/5041 co-relation queries the response was YES. [2024-06-20 18:15:58,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2073 conditions, 407 events. 216/407 cut-off events. For 5037/5041 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 1760 event pairs, 32 based on Foata normal form. 13/420 useless extension candidates. Maximal degree in co-relation 2022. Up to 241 conditions per place. [2024-06-20 18:15:58,311 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 41 selfloop transitions, 13 changer transitions 13/70 dead transitions. [2024-06-20 18:15:58,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 70 transitions, 684 flow [2024-06-20 18:15:58,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 18:15:58,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 18:15:58,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 114 transitions. [2024-06-20 18:15:58,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3573667711598746 [2024-06-20 18:15:58,312 INFO L175 Difference]: Start difference. First operand has 87 places, 50 transitions, 410 flow. Second operand 11 states and 114 transitions. [2024-06-20 18:15:58,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 70 transitions, 684 flow [2024-06-20 18:15:58,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 70 transitions, 644 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-20 18:15:58,317 INFO L231 Difference]: Finished difference. Result has 83 places, 48 transitions, 388 flow [2024-06-20 18:15:58,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=388, PETRI_PLACES=83, PETRI_TRANSITIONS=48} [2024-06-20 18:15:58,317 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 52 predicate places. [2024-06-20 18:15:58,318 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 48 transitions, 388 flow [2024-06-20 18:15:58,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:58,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:15:58,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:15:58,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 18:15:58,318 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 18:15:58,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:15:58,318 INFO L85 PathProgramCache]: Analyzing trace with hash -234734293, now seen corresponding path program 13 times [2024-06-20 18:15:58,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:15:58,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31019096] [2024-06-20 18:15:58,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:15:58,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:15:58,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:15:58,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:15:58,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:15:58,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31019096] [2024-06-20 18:15:58,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31019096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:15:58,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:15:58,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 18:15:58,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602222025] [2024-06-20 18:15:58,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:15:58,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 18:15:58,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:15:58,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 18:15:58,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-20 18:15:58,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-20 18:15:58,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 48 transitions, 388 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:58,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:15:58,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-20 18:15:58,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:15:58,824 INFO L124 PetriNetUnfolderBase]: 205/388 cut-off events. [2024-06-20 18:15:58,825 INFO L125 PetriNetUnfolderBase]: For 4228/4228 co-relation queries the response was YES. [2024-06-20 18:15:58,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1904 conditions, 388 events. 205/388 cut-off events. For 4228/4228 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1630 event pairs, 32 based on Foata normal form. 9/397 useless extension candidates. Maximal degree in co-relation 1855. Up to 224 conditions per place. [2024-06-20 18:15:58,827 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 38 selfloop transitions, 10 changer transitions 17/68 dead transitions. [2024-06-20 18:15:58,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 68 transitions, 628 flow [2024-06-20 18:15:58,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 18:15:58,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 18:15:58,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 113 transitions. [2024-06-20 18:15:58,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3542319749216301 [2024-06-20 18:15:58,828 INFO L175 Difference]: Start difference. First operand has 83 places, 48 transitions, 388 flow. Second operand 11 states and 113 transitions. [2024-06-20 18:15:58,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 68 transitions, 628 flow [2024-06-20 18:15:58,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 68 transitions, 598 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 18:15:58,833 INFO L231 Difference]: Finished difference. Result has 81 places, 44 transitions, 346 flow [2024-06-20 18:15:58,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=346, PETRI_PLACES=81, PETRI_TRANSITIONS=44} [2024-06-20 18:15:58,834 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 50 predicate places. [2024-06-20 18:15:58,834 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 44 transitions, 346 flow [2024-06-20 18:15:58,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:58,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:15:58,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:15:58,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 18:15:58,835 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 18:15:58,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:15:58,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1354444655, now seen corresponding path program 14 times [2024-06-20 18:15:58,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:15:58,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516406459] [2024-06-20 18:15:58,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:15:58,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:15:58,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:15:59,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:15:59,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:15:59,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516406459] [2024-06-20 18:15:59,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516406459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:15:59,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:15:59,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 18:15:59,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817271132] [2024-06-20 18:15:59,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:15:59,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 18:15:59,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:15:59,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 18:15:59,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-20 18:15:59,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-20 18:15:59,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 44 transitions, 346 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:59,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:15:59,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-20 18:15:59,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:15:59,267 INFO L124 PetriNetUnfolderBase]: 192/361 cut-off events. [2024-06-20 18:15:59,267 INFO L125 PetriNetUnfolderBase]: For 3766/3768 co-relation queries the response was YES. [2024-06-20 18:15:59,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1790 conditions, 361 events. 192/361 cut-off events. For 3766/3768 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1483 event pairs, 28 based on Foata normal form. 11/372 useless extension candidates. Maximal degree in co-relation 1742. Up to 189 conditions per place. [2024-06-20 18:15:59,268 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 35 selfloop transitions, 11 changer transitions 18/67 dead transitions. [2024-06-20 18:15:59,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 67 transitions, 646 flow [2024-06-20 18:15:59,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 18:15:59,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 18:15:59,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 116 transitions. [2024-06-20 18:15:59,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-20 18:15:59,269 INFO L175 Difference]: Start difference. First operand has 81 places, 44 transitions, 346 flow. Second operand 11 states and 116 transitions. [2024-06-20 18:15:59,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 67 transitions, 646 flow [2024-06-20 18:15:59,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 67 transitions, 588 flow, removed 19 selfloop flow, removed 10 redundant places. [2024-06-20 18:15:59,274 INFO L231 Difference]: Finished difference. Result has 75 places, 41 transitions, 304 flow [2024-06-20 18:15:59,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=304, PETRI_PLACES=75, PETRI_TRANSITIONS=41} [2024-06-20 18:15:59,275 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 44 predicate places. [2024-06-20 18:15:59,275 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 41 transitions, 304 flow [2024-06-20 18:15:59,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:59,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:15:59,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:15:59,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 18:15:59,275 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 18:15:59,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:15:59,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1352541875, now seen corresponding path program 15 times [2024-06-20 18:15:59,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:15:59,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043221453] [2024-06-20 18:15:59,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:15:59,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:15:59,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:15:59,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:15:59,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:15:59,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043221453] [2024-06-20 18:15:59,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043221453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:15:59,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:15:59,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 18:15:59,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768542199] [2024-06-20 18:15:59,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:15:59,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 18:15:59,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:15:59,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 18:15:59,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-20 18:15:59,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-20 18:15:59,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 41 transitions, 304 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:59,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:15:59,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-20 18:15:59,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:15:59,726 INFO L124 PetriNetUnfolderBase]: 172/329 cut-off events. [2024-06-20 18:15:59,726 INFO L125 PetriNetUnfolderBase]: For 2766/2768 co-relation queries the response was YES. [2024-06-20 18:15:59,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1504 conditions, 329 events. 172/329 cut-off events. For 2766/2768 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1305 event pairs, 28 based on Foata normal form. 11/340 useless extension candidates. Maximal degree in co-relation 1459. Up to 169 conditions per place. [2024-06-20 18:15:59,727 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 33 selfloop transitions, 12 changer transitions 13/61 dead transitions. [2024-06-20 18:15:59,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 61 transitions, 540 flow [2024-06-20 18:15:59,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 18:15:59,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 18:15:59,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 113 transitions. [2024-06-20 18:15:59,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3542319749216301 [2024-06-20 18:15:59,729 INFO L175 Difference]: Start difference. First operand has 75 places, 41 transitions, 304 flow. Second operand 11 states and 113 transitions. [2024-06-20 18:15:59,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 61 transitions, 540 flow [2024-06-20 18:15:59,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 61 transitions, 506 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-20 18:15:59,734 INFO L231 Difference]: Finished difference. Result has 71 places, 39 transitions, 284 flow [2024-06-20 18:15:59,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=284, PETRI_PLACES=71, PETRI_TRANSITIONS=39} [2024-06-20 18:15:59,734 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 40 predicate places. [2024-06-20 18:15:59,735 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 39 transitions, 284 flow [2024-06-20 18:15:59,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:15:59,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:15:59,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:15:59,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 18:15:59,735 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 18:15:59,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:15:59,736 INFO L85 PathProgramCache]: Analyzing trace with hash -433142353, now seen corresponding path program 16 times [2024-06-20 18:15:59,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:15:59,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096130476] [2024-06-20 18:15:59,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:15:59,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:15:59,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:16:00,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:16:00,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:16:00,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096130476] [2024-06-20 18:16:00,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096130476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:16:00,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:16:00,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 18:16:00,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412957633] [2024-06-20 18:16:00,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:16:00,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 18:16:00,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:16:00,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 18:16:00,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-20 18:16:00,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-20 18:16:00,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 39 transitions, 284 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:16:00,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:16:00,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-20 18:16:00,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:16:00,211 INFO L124 PetriNetUnfolderBase]: 161/310 cut-off events. [2024-06-20 18:16:00,211 INFO L125 PetriNetUnfolderBase]: For 2279/2279 co-relation queries the response was YES. [2024-06-20 18:16:00,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1359 conditions, 310 events. 161/310 cut-off events. For 2279/2279 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1199 event pairs, 10 based on Foata normal form. 9/319 useless extension candidates. Maximal degree in co-relation 1316. Up to 152 conditions per place. [2024-06-20 18:16:00,213 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 29 selfloop transitions, 8 changer transitions 19/59 dead transitions. [2024-06-20 18:16:00,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 59 transitions, 494 flow [2024-06-20 18:16:00,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 18:16:00,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 18:16:00,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 112 transitions. [2024-06-20 18:16:00,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3510971786833856 [2024-06-20 18:16:00,214 INFO L175 Difference]: Start difference. First operand has 71 places, 39 transitions, 284 flow. Second operand 11 states and 112 transitions. [2024-06-20 18:16:00,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 59 transitions, 494 flow [2024-06-20 18:16:00,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 59 transitions, 466 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 18:16:00,219 INFO L231 Difference]: Finished difference. Result has 69 places, 34 transitions, 241 flow [2024-06-20 18:16:00,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=241, PETRI_PLACES=69, PETRI_TRANSITIONS=34} [2024-06-20 18:16:00,219 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 38 predicate places. [2024-06-20 18:16:00,220 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 34 transitions, 241 flow [2024-06-20 18:16:00,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:16:00,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:16:00,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:16:00,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 18:16:00,225 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 18:16:00,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:16:00,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1696999155, now seen corresponding path program 17 times [2024-06-20 18:16:00,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:16:00,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467703976] [2024-06-20 18:16:00,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:16:00,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:16:00,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:16:00,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:16:00,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:16:00,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467703976] [2024-06-20 18:16:00,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467703976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:16:00,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:16:00,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 18:16:00,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731476566] [2024-06-20 18:16:00,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:16:00,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 18:16:00,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:16:00,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 18:16:00,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-20 18:16:00,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-20 18:16:00,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 34 transitions, 241 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:16:00,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:16:00,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-20 18:16:00,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:16:00,660 INFO L124 PetriNetUnfolderBase]: 147/282 cut-off events. [2024-06-20 18:16:00,661 INFO L125 PetriNetUnfolderBase]: For 2031/2031 co-relation queries the response was YES. [2024-06-20 18:16:00,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1245 conditions, 282 events. 147/282 cut-off events. For 2031/2031 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1053 event pairs, 6 based on Foata normal form. 9/291 useless extension candidates. Maximal degree in co-relation 1203. Up to 131 conditions per place. [2024-06-20 18:16:00,662 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 26 selfloop transitions, 8 changer transitions 19/56 dead transitions. [2024-06-20 18:16:00,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 56 transitions, 459 flow [2024-06-20 18:16:00,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 18:16:00,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 18:16:00,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 114 transitions. [2024-06-20 18:16:00,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3573667711598746 [2024-06-20 18:16:00,662 INFO L175 Difference]: Start difference. First operand has 69 places, 34 transitions, 241 flow. Second operand 11 states and 114 transitions. [2024-06-20 18:16:00,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 56 transitions, 459 flow [2024-06-20 18:16:00,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 56 transitions, 408 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-20 18:16:00,665 INFO L231 Difference]: Finished difference. Result has 61 places, 30 transitions, 192 flow [2024-06-20 18:16:00,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=192, PETRI_PLACES=61, PETRI_TRANSITIONS=30} [2024-06-20 18:16:00,666 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 30 predicate places. [2024-06-20 18:16:00,666 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 30 transitions, 192 flow [2024-06-20 18:16:00,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:16:00,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:16:00,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:16:00,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 18:16:00,667 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 18:16:00,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:16:00,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1946349825, now seen corresponding path program 18 times [2024-06-20 18:16:00,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:16:00,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737714380] [2024-06-20 18:16:00,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:16:00,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:16:00,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:16:00,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:16:00,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:16:00,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737714380] [2024-06-20 18:16:00,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737714380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:16:00,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:16:00,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 18:16:00,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436636862] [2024-06-20 18:16:00,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:16:00,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 18:16:00,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:16:00,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 18:16:00,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-20 18:16:00,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-20 18:16:00,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 30 transitions, 192 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:16:00,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:16:00,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-20 18:16:00,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:16:01,123 INFO L124 PetriNetUnfolderBase]: 118/225 cut-off events. [2024-06-20 18:16:01,124 INFO L125 PetriNetUnfolderBase]: For 1345/1353 co-relation queries the response was YES. [2024-06-20 18:16:01,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 942 conditions, 225 events. 118/225 cut-off events. For 1345/1353 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 775 event pairs, 24 based on Foata normal form. 17/242 useless extension candidates. Maximal degree in co-relation 905. Up to 110 conditions per place. [2024-06-20 18:16:01,125 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 21 selfloop transitions, 7 changer transitions 18/49 dead transitions. [2024-06-20 18:16:01,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 49 transitions, 368 flow [2024-06-20 18:16:01,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 18:16:01,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 18:16:01,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 109 transitions. [2024-06-20 18:16:01,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34169278996865204 [2024-06-20 18:16:01,126 INFO L175 Difference]: Start difference. First operand has 61 places, 30 transitions, 192 flow. Second operand 11 states and 109 transitions. [2024-06-20 18:16:01,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 49 transitions, 368 flow [2024-06-20 18:16:01,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 49 transitions, 336 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-20 18:16:01,129 INFO L231 Difference]: Finished difference. Result has 55 places, 27 transitions, 153 flow [2024-06-20 18:16:01,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=153, PETRI_PLACES=55, PETRI_TRANSITIONS=27} [2024-06-20 18:16:01,129 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 24 predicate places. [2024-06-20 18:16:01,129 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 27 transitions, 153 flow [2024-06-20 18:16:01,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:16:01,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:16:01,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:16:01,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 18:16:01,130 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 18:16:01,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:16:01,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1953672645, now seen corresponding path program 19 times [2024-06-20 18:16:01,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:16:01,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788723428] [2024-06-20 18:16:01,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:16:01,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:16:01,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:16:01,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:16:01,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:16:01,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788723428] [2024-06-20 18:16:01,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788723428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:16:01,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:16:01,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 18:16:01,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524678925] [2024-06-20 18:16:01,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:16:01,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 18:16:01,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:16:01,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 18:16:01,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-20 18:16:01,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-20 18:16:01,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 27 transitions, 153 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:16:01,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:16:01,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-20 18:16:01,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:16:01,538 INFO L124 PetriNetUnfolderBase]: 98/191 cut-off events. [2024-06-20 18:16:01,538 INFO L125 PetriNetUnfolderBase]: For 954/954 co-relation queries the response was YES. [2024-06-20 18:16:01,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 754 conditions, 191 events. 98/191 cut-off events. For 954/954 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 639 event pairs, 24 based on Foata normal form. 9/200 useless extension candidates. Maximal degree in co-relation 720. Up to 90 conditions per place. [2024-06-20 18:16:01,539 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 19 selfloop transitions, 8 changer transitions 13/43 dead transitions. [2024-06-20 18:16:01,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 43 transitions, 299 flow [2024-06-20 18:16:01,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 18:16:01,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 18:16:01,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 106 transitions. [2024-06-20 18:16:01,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3322884012539185 [2024-06-20 18:16:01,540 INFO L175 Difference]: Start difference. First operand has 55 places, 27 transitions, 153 flow. Second operand 11 states and 106 transitions. [2024-06-20 18:16:01,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 43 transitions, 299 flow [2024-06-20 18:16:01,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 43 transitions, 265 flow, removed 9 selfloop flow, removed 12 redundant places. [2024-06-20 18:16:01,541 INFO L231 Difference]: Finished difference. Result has 49 places, 25 transitions, 130 flow [2024-06-20 18:16:01,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=130, PETRI_PLACES=49, PETRI_TRANSITIONS=25} [2024-06-20 18:16:01,541 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 18 predicate places. [2024-06-20 18:16:01,542 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 25 transitions, 130 flow [2024-06-20 18:16:01,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:16:01,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 18:16:01,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 18:16:01,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 18:16:01,542 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 18:16:01,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 18:16:01,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1953677295, now seen corresponding path program 20 times [2024-06-20 18:16:01,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 18:16:01,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887179928] [2024-06-20 18:16:01,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 18:16:01,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 18:16:01,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 18:16:01,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 18:16:01,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 18:16:01,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887179928] [2024-06-20 18:16:01,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887179928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 18:16:01,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 18:16:01,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 18:16:01,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121512220] [2024-06-20 18:16:01,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 18:16:01,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 18:16:01,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 18:16:01,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 18:16:01,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-20 18:16:01,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-20 18:16:01,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 25 transitions, 130 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:16:01,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 18:16:01,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-20 18:16:01,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 18:16:01,926 INFO L124 PetriNetUnfolderBase]: 42/96 cut-off events. [2024-06-20 18:16:01,926 INFO L125 PetriNetUnfolderBase]: For 268/268 co-relation queries the response was YES. [2024-06-20 18:16:01,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 319 conditions, 96 events. 42/96 cut-off events. For 268/268 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 221 event pairs, 0 based on Foata normal form. 9/105 useless extension candidates. Maximal degree in co-relation 306. Up to 51 conditions per place. [2024-06-20 18:16:01,927 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 0 selfloop transitions, 0 changer transitions 33/33 dead transitions. [2024-06-20 18:16:01,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 33 transitions, 204 flow [2024-06-20 18:16:01,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 18:16:01,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 18:16:01,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 97 transitions. [2024-06-20 18:16:01,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30407523510971785 [2024-06-20 18:16:01,928 INFO L175 Difference]: Start difference. First operand has 49 places, 25 transitions, 130 flow. Second operand 11 states and 97 transitions. [2024-06-20 18:16:01,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 33 transitions, 204 flow [2024-06-20 18:16:01,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 33 transitions, 180 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-20 18:16:01,928 INFO L231 Difference]: Finished difference. Result has 44 places, 0 transitions, 0 flow [2024-06-20 18:16:01,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=0, PETRI_PLACES=44, PETRI_TRANSITIONS=0} [2024-06-20 18:16:01,929 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 13 predicate places. [2024-06-20 18:16:01,929 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 0 transitions, 0 flow [2024-06-20 18:16:01,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 18:16:01,931 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-20 18:16:01,932 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-20 18:16:01,932 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-20 18:16:01,932 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-20 18:16:01,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 18:16:01,932 INFO L445 BasicCegarLoop]: Path program histogram: [20, 10, 10, 6, 1, 1, 1, 1, 1] [2024-06-20 18:16:01,935 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-20 18:16:01,935 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-20 18:16:01,939 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-20 18:16:01,939 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-20 18:16:01,940 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.06 06:16:01 BasicIcfg [2024-06-20 18:16:01,940 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-20 18:16:01,940 INFO L158 Benchmark]: Toolchain (without parser) took 27706.43ms. Allocated memory was 176.2MB in the beginning and 373.3MB in the end (delta: 197.1MB). Free memory was 116.3MB in the beginning and 199.9MB in the end (delta: -83.6MB). Peak memory consumption was 114.7MB. Max. memory is 16.1GB. [2024-06-20 18:16:01,941 INFO L158 Benchmark]: Witness Parser took 0.20ms. Allocated memory is still 176.2MB. Free memory is still 139.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-20 18:16:01,941 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 176.2MB. Free memory was 135.6MB in the beginning and 135.5MB in the end (delta: 108.3kB). There was no memory consumed. Max. memory is 16.1GB. [2024-06-20 18:16:01,941 INFO L158 Benchmark]: CACSL2BoogieTranslator took 532.47ms. Allocated memory is still 176.2MB. Free memory was 116.3MB in the beginning and 90.2MB in the end (delta: 26.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-06-20 18:16:01,941 INFO L158 Benchmark]: Boogie Procedure Inliner took 50.55ms. Allocated memory is still 176.2MB. Free memory was 90.2MB in the beginning and 88.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-20 18:16:01,942 INFO L158 Benchmark]: Boogie Preprocessor took 35.52ms. Allocated memory is still 176.2MB. Free memory was 88.1MB in the beginning and 85.4MB in the end (delta: 2.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-20 18:16:01,942 INFO L158 Benchmark]: RCFGBuilder took 451.89ms. Allocated memory is still 176.2MB. Free memory was 85.4MB in the beginning and 58.7MB in the end (delta: 26.7MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-06-20 18:16:01,942 INFO L158 Benchmark]: TraceAbstraction took 26630.24ms. Allocated memory was 176.2MB in the beginning and 373.3MB in the end (delta: 197.1MB). Free memory was 57.6MB in the beginning and 199.9MB in the end (delta: -142.3MB). Peak memory consumption was 55.9MB. Max. memory is 16.1GB. [2024-06-20 18:16:01,944 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.20ms. Allocated memory is still 176.2MB. Free memory is still 139.9MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.15ms. Allocated memory is still 176.2MB. Free memory was 135.6MB in the beginning and 135.5MB in the end (delta: 108.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 532.47ms. Allocated memory is still 176.2MB. Free memory was 116.3MB in the beginning and 90.2MB in the end (delta: 26.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 50.55ms. Allocated memory is still 176.2MB. Free memory was 90.2MB in the beginning and 88.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 35.52ms. Allocated memory is still 176.2MB. Free memory was 88.1MB in the beginning and 85.4MB in the end (delta: 2.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 451.89ms. Allocated memory is still 176.2MB. Free memory was 85.4MB in the beginning and 58.7MB in the end (delta: 26.7MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 26630.24ms. Allocated memory was 176.2MB in the beginning and 373.3MB in the end (delta: 197.1MB). Free memory was 57.6MB in the beginning and 199.9MB in the end (delta: -142.3MB). Peak memory consumption was 55.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 721]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 722]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 39 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 26.5s, OverallIterations: 51, TraceHistogramMax: 1, PathProgramHistogramMax: 20, EmptinessCheckTime: 0.0s, AutomataDifference: 11.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3383 SdHoareTripleChecker+Valid, 7.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2951 mSDsluCounter, 570 SdHoareTripleChecker+Invalid, 6.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 468 mSDsCounter, 463 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 15419 IncrementalHoareTripleChecker+Invalid, 15882 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 463 mSolverCounterUnsat, 102 mSDtfsCounter, 15419 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 407 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 407 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 5.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=966occurred in iteration=30, InterpolantAutomatonStates: 509, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 14.2s InterpolantComputationTime, 902 NumberOfCodeBlocks, 902 NumberOfCodeBlocksAsserted, 51 NumberOfCheckSat, 851 ConstructedInterpolants, 0 QuantifiedInterpolants, 17720 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 51 InterpolantComputations, 51 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-20 18:16:01,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE