./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/fib_safe-10.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/fib_safe-10.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread/fib_safe-10.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/fib_safe-10.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 20:01:57,934 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 20:01:57,982 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 20:01:57,990 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 20:01:57,991 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 20:01:58,018 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 20:01:58,022 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 20:01:58,023 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 20:01:58,023 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 20:01:58,026 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 20:01:58,026 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 20:01:58,027 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 20:01:58,027 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 20:01:58,028 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 20:01:58,029 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 20:01:58,029 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 20:01:58,029 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 20:01:58,030 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 20:01:58,030 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 20:01:58,030 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 20:01:58,030 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 20:01:58,030 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 20:01:58,031 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 20:01:58,031 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 20:01:58,031 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 20:01:58,031 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 20:01:58,031 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 20:01:58,032 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 20:01:58,032 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 20:01:58,032 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 20:01:58,033 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 20:01:58,033 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 20:01:58,033 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:01:58,033 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 20:01:58,034 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 20:01:58,034 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 20:01:58,034 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 20:01:58,034 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 20:01:58,034 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 20:01:58,034 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 20:01:58,034 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 20:01:58,035 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 20:01:58,035 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 20:01:58,035 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 20:01:58,240 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 20:01:58,272 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 20:01:58,274 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 20:01:58,283 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 20:01:58,284 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 20:01:58,285 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_safe-10.i [2024-06-21 20:01:59,350 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 20:01:59,601 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 20:01:59,602 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_safe-10.i [2024-06-21 20:01:59,617 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16a36a293/eed5fdbdcd1a40b98ce6ea9cf489a9bd/FLAG13ccbf933 [2024-06-21 20:01:59,630 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16a36a293/eed5fdbdcd1a40b98ce6ea9cf489a9bd [2024-06-21 20:01:59,632 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 20:01:59,632 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 20:01:59,633 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/fib_safe-10.yml/witness.yml [2024-06-21 20:01:59,725 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 20:01:59,726 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 20:01:59,727 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 20:01:59,727 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 20:01:59,731 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 20:01:59,733 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:01:59" (1/2) ... [2024-06-21 20:01:59,734 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55a03e3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:01:59, skipping insertion in model container [2024-06-21 20:01:59,735 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:01:59" (1/2) ... [2024-06-21 20:01:59,736 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1e4a6143 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:01:59, skipping insertion in model container [2024-06-21 20:01:59,736 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:01:59" (2/2) ... [2024-06-21 20:01:59,737 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55a03e3a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:01:59, skipping insertion in model container [2024-06-21 20:01:59,737 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:01:59" (2/2) ... [2024-06-21 20:01:59,738 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 20:01:59,774 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 20:01:59,775 INFO L97 edCorrectnessWitness]: Location invariant before [L721-L721] ((((((((! multithreaded || 0 <= cur) && (! multithreaded || 0 <= next)) && (! multithreaded || 1 <= i)) && (! multithreaded || 0 <= p)) && (! multithreaded || 0 <= q)) && (! multithreaded || (1 <= i && 1 <= j))) && (! multithreaded || 0 <= x)) && (! multithreaded || 0 <= prev)) && (! multithreaded || 1 <= j) [2024-06-21 20:01:59,775 INFO L97 edCorrectnessWitness]: Location invariant before [L722-L722] ((((((((! multithreaded || 0 <= cur) && (! multithreaded || 0 <= next)) && (! multithreaded || 1 <= i)) && (! multithreaded || 0 <= p)) && (! multithreaded || 0 <= q)) && (! multithreaded || (1 <= i && 1 <= j))) && (! multithreaded || 0 <= x)) && (! multithreaded || 0 <= prev)) && (! multithreaded || 1 <= j) [2024-06-21 20:01:59,776 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 20:01:59,776 INFO L106 edCorrectnessWitness]: ghost_update [L720-L720] multithreaded = 1; [2024-06-21 20:01:59,812 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 20:02:00,081 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:02:00,090 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 20:02:00,162 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:02:00,192 INFO L206 MainTranslator]: Completed translation [2024-06-21 20:02:00,192 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:02:00 WrapperNode [2024-06-21 20:02:00,192 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 20:02:00,193 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 20:02:00,193 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 20:02:00,216 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 20:02:00,221 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:02:00" (1/1) ... [2024-06-21 20:02:00,241 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:02:00" (1/1) ... [2024-06-21 20:02:00,264 INFO L138 Inliner]: procedures = 164, calls = 21, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 73 [2024-06-21 20:02:00,266 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 20:02:00,283 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 20:02:00,284 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 20:02:00,284 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 20:02:00,291 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:02:00" (1/1) ... [2024-06-21 20:02:00,291 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:02:00" (1/1) ... [2024-06-21 20:02:00,293 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:02:00" (1/1) ... [2024-06-21 20:02:00,301 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 20:02:00,302 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:02:00" (1/1) ... [2024-06-21 20:02:00,302 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:02:00" (1/1) ... [2024-06-21 20:02:00,305 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:02:00" (1/1) ... [2024-06-21 20:02:00,307 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:02:00" (1/1) ... [2024-06-21 20:02:00,308 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:02:00" (1/1) ... [2024-06-21 20:02:00,308 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:02:00" (1/1) ... [2024-06-21 20:02:00,310 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 20:02:00,311 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 20:02:00,311 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 20:02:00,311 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 20:02:00,311 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:02:00" (1/1) ... [2024-06-21 20:02:00,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:02:00,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 20:02:00,334 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 20:02:00,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 20:02:00,362 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-06-21 20:02:00,363 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-06-21 20:02:00,363 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-06-21 20:02:00,363 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-06-21 20:02:00,363 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 20:02:00,363 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 20:02:00,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 20:02:00,364 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 20:02:00,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 20:02:00,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 20:02:00,365 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 20:02:00,464 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 20:02:00,466 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 20:02:00,639 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 20:02:00,639 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 20:02:00,733 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 20:02:00,734 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-06-21 20:02:00,735 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:02:00 BoogieIcfgContainer [2024-06-21 20:02:00,735 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 20:02:00,737 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 20:02:00,738 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 20:02:00,740 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 20:02:00,740 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 08:01:59" (1/4) ... [2024-06-21 20:02:00,741 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ab45cd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:02:00, skipping insertion in model container [2024-06-21 20:02:00,741 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:01:59" (2/4) ... [2024-06-21 20:02:00,742 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ab45cd9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:02:00, skipping insertion in model container [2024-06-21 20:02:00,742 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:02:00" (3/4) ... [2024-06-21 20:02:00,742 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ab45cd9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:02:00, skipping insertion in model container [2024-06-21 20:02:00,742 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:02:00" (4/4) ... [2024-06-21 20:02:00,743 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_safe-10.i [2024-06-21 20:02:00,756 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 20:02:00,756 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-21 20:02:00,756 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 20:02:00,781 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 20:02:00,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 29 transitions, 66 flow [2024-06-21 20:02:00,827 INFO L124 PetriNetUnfolderBase]: 3/27 cut-off events. [2024-06-21 20:02:00,828 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:02:00,830 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. [2024-06-21 20:02:00,830 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 29 transitions, 66 flow [2024-06-21 20:02:00,833 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 27 transitions, 60 flow [2024-06-21 20:02:00,845 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 20:02:00,854 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;@34a26afc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 20:02:00,854 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-21 20:02:00,861 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 20:02:00,861 INFO L124 PetriNetUnfolderBase]: 0/10 cut-off events. [2024-06-21 20:02:00,861 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:02:00,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:00,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:00,862 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)] === [2024-06-21 20:02:00,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:00,868 INFO L85 PathProgramCache]: Analyzing trace with hash 230814316, now seen corresponding path program 1 times [2024-06-21 20:02:00,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:00,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419677349] [2024-06-21 20:02:00,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:00,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:00,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:01,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:01,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:01,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419677349] [2024-06-21 20:02:01,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419677349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:01,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:01,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:02:01,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631508719] [2024-06-21 20:02:01,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:01,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:02:01,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:01,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:02:01,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:02:01,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 20:02:01,328 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) [2024-06-21 20:02:01,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:01,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 20:02:01,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:01,509 INFO L124 PetriNetUnfolderBase]: 322/536 cut-off events. [2024-06-21 20:02:01,510 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-06-21 20:02:01,512 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. [2024-06-21 20:02:01,516 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 33 selfloop transitions, 8 changer transitions 12/56 dead transitions. [2024-06-21 20:02:01,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 56 transitions, 225 flow [2024-06-21 20:02:01,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:02:01,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:02:01,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-21 20:02:01,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6137931034482759 [2024-06-21 20:02:01,527 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 60 flow. Second operand 5 states and 89 transitions. [2024-06-21 20:02:01,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 56 transitions, 225 flow [2024-06-21 20:02:01,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 56 transitions, 222 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-21 20:02:01,531 INFO L231 Difference]: Finished difference. Result has 36 places, 27 transitions, 103 flow [2024-06-21 20:02:01,533 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} [2024-06-21 20:02:01,536 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 5 predicate places. [2024-06-21 20:02:01,536 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 27 transitions, 103 flow [2024-06-21 20:02:01,536 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) [2024-06-21 20:02:01,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:01,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:01,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 20:02:01,537 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)] === [2024-06-21 20:02:01,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:01,537 INFO L85 PathProgramCache]: Analyzing trace with hash -52698492, now seen corresponding path program 1 times [2024-06-21 20:02:01,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:01,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783622492] [2024-06-21 20:02:01,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:01,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:01,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:01,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:01,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:01,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783622492] [2024-06-21 20:02:01,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783622492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:01,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:01,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:01,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094534119] [2024-06-21 20:02:01,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:01,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:02:01,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:01,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:02:01,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:02:01,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 20:02:01,862 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) [2024-06-21 20:02:01,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:01,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 20:02:01,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:01,966 INFO L124 PetriNetUnfolderBase]: 160/298 cut-off events. [2024-06-21 20:02:01,966 INFO L125 PetriNetUnfolderBase]: For 116/116 co-relation queries the response was YES. [2024-06-21 20:02:01,969 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. [2024-06-21 20:02:01,971 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 41 selfloop transitions, 12 changer transitions 0/56 dead transitions. [2024-06-21 20:02:01,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 56 transitions, 289 flow [2024-06-21 20:02:01,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:02:01,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:02:01,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 98 transitions. [2024-06-21 20:02:01,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4827586206896552 [2024-06-21 20:02:01,976 INFO L175 Difference]: Start difference. First operand has 36 places, 27 transitions, 103 flow. Second operand 7 states and 98 transitions. [2024-06-21 20:02:01,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 56 transitions, 289 flow [2024-06-21 20:02:01,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 56 transitions, 289 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-21 20:02:01,982 INFO L231 Difference]: Finished difference. Result has 41 places, 31 transitions, 162 flow [2024-06-21 20:02:01,983 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} [2024-06-21 20:02:01,984 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 10 predicate places. [2024-06-21 20:02:01,984 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 31 transitions, 162 flow [2024-06-21 20:02:01,984 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) [2024-06-21 20:02:01,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:01,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:01,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 20:02:01,985 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)] === [2024-06-21 20:02:01,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:01,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1633652470, now seen corresponding path program 1 times [2024-06-21 20:02:01,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:01,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061641359] [2024-06-21 20:02:01,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:01,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:02,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:02,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:02,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:02,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061641359] [2024-06-21 20:02:02,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061641359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:02,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:02,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:02:02,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054613696] [2024-06-21 20:02:02,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:02,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:02:02,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:02,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:02:02,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:02:02,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 20:02:02,244 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) [2024-06-21 20:02:02,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:02,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 20:02:02,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:02,343 INFO L124 PetriNetUnfolderBase]: 145/273 cut-off events. [2024-06-21 20:02:02,343 INFO L125 PetriNetUnfolderBase]: For 304/308 co-relation queries the response was YES. [2024-06-21 20:02:02,344 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. [2024-06-21 20:02:02,346 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 43 selfloop transitions, 13 changer transitions 0/59 dead transitions. [2024-06-21 20:02:02,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 59 transitions, 364 flow [2024-06-21 20:02:02,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:02:02,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:02:02,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 106 transitions. [2024-06-21 20:02:02,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45689655172413796 [2024-06-21 20:02:02,348 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 162 flow. Second operand 8 states and 106 transitions. [2024-06-21 20:02:02,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 59 transitions, 364 flow [2024-06-21 20:02:02,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 59 transitions, 344 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-21 20:02:02,350 INFO L231 Difference]: Finished difference. Result has 44 places, 31 transitions, 174 flow [2024-06-21 20:02:02,350 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} [2024-06-21 20:02:02,351 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 13 predicate places. [2024-06-21 20:02:02,351 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 31 transitions, 174 flow [2024-06-21 20:02:02,351 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) [2024-06-21 20:02:02,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:02,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:02,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 20:02:02,352 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)] === [2024-06-21 20:02:02,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:02,353 INFO L85 PathProgramCache]: Analyzing trace with hash -659881598, now seen corresponding path program 1 times [2024-06-21 20:02:02,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:02,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026343581] [2024-06-21 20:02:02,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:02,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:02,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:02,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:02,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:02,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026343581] [2024-06-21 20:02:02,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026343581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:02,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:02,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:02:02,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755167727] [2024-06-21 20:02:02,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:02,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:02:02,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:02,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:02:02,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:02:02,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 20:02:02,589 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) [2024-06-21 20:02:02,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:02,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 20:02:02,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:02,664 INFO L124 PetriNetUnfolderBase]: 169/315 cut-off events. [2024-06-21 20:02:02,664 INFO L125 PetriNetUnfolderBase]: For 449/449 co-relation queries the response was YES. [2024-06-21 20:02:02,665 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. [2024-06-21 20:02:02,666 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 35 selfloop transitions, 11 changer transitions 0/49 dead transitions. [2024-06-21 20:02:02,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 49 transitions, 346 flow [2024-06-21 20:02:02,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:02:02,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:02:02,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 84 transitions. [2024-06-21 20:02:02,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41379310344827586 [2024-06-21 20:02:02,667 INFO L175 Difference]: Start difference. First operand has 44 places, 31 transitions, 174 flow. Second operand 7 states and 84 transitions. [2024-06-21 20:02:02,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 49 transitions, 346 flow [2024-06-21 20:02:02,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 49 transitions, 318 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 20:02:02,671 INFO L231 Difference]: Finished difference. Result has 47 places, 34 transitions, 205 flow [2024-06-21 20:02:02,671 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} [2024-06-21 20:02:02,673 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 16 predicate places. [2024-06-21 20:02:02,673 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 34 transitions, 205 flow [2024-06-21 20:02:02,673 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) [2024-06-21 20:02:02,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:02,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:02,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 20:02:02,673 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)] === [2024-06-21 20:02:02,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:02,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1018507759, now seen corresponding path program 1 times [2024-06-21 20:02:02,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:02,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597931403] [2024-06-21 20:02:02,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:02,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:02,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:02,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:02,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:02,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597931403] [2024-06-21 20:02:02,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597931403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:02,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:02,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:02:02,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036810549] [2024-06-21 20:02:02,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:02,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:02:02,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:02,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:02:02,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:02:02,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 20:02:02,918 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) [2024-06-21 20:02:02,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:02,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 20:02:02,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:02,996 INFO L124 PetriNetUnfolderBase]: 151/288 cut-off events. [2024-06-21 20:02:02,996 INFO L125 PetriNetUnfolderBase]: For 507/507 co-relation queries the response was YES. [2024-06-21 20:02:02,997 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. [2024-06-21 20:02:02,998 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 32 selfloop transitions, 11 changer transitions 2/48 dead transitions. [2024-06-21 20:02:02,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 48 transitions, 347 flow [2024-06-21 20:02:02,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:02:02,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:02:02,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 89 transitions. [2024-06-21 20:02:03,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38362068965517243 [2024-06-21 20:02:03,000 INFO L175 Difference]: Start difference. First operand has 47 places, 34 transitions, 205 flow. Second operand 8 states and 89 transitions. [2024-06-21 20:02:03,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 48 transitions, 347 flow [2024-06-21 20:02:03,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 48 transitions, 334 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 20:02:03,002 INFO L231 Difference]: Finished difference. Result has 52 places, 34 transitions, 218 flow [2024-06-21 20:02:03,002 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} [2024-06-21 20:02:03,002 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 21 predicate places. [2024-06-21 20:02:03,003 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 34 transitions, 218 flow [2024-06-21 20:02:03,003 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) [2024-06-21 20:02:03,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:03,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:03,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 20:02:03,003 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)] === [2024-06-21 20:02:03,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:03,004 INFO L85 PathProgramCache]: Analyzing trace with hash -732814132, now seen corresponding path program 1 times [2024-06-21 20:02:03,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:03,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669508248] [2024-06-21 20:02:03,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:03,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:03,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:03,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:03,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:03,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669508248] [2024-06-21 20:02:03,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669508248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:03,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:03,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:02:03,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588232802] [2024-06-21 20:02:03,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:03,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:02:03,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:03,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:02:03,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:02:03,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 20:02:03,237 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) [2024-06-21 20:02:03,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:03,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 20:02:03,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:03,323 INFO L124 PetriNetUnfolderBase]: 157/300 cut-off events. [2024-06-21 20:02:03,323 INFO L125 PetriNetUnfolderBase]: For 637/641 co-relation queries the response was YES. [2024-06-21 20:02:03,325 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. [2024-06-21 20:02:03,326 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 38 selfloop transitions, 17 changer transitions 1/59 dead transitions. [2024-06-21 20:02:03,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 59 transitions, 419 flow [2024-06-21 20:02:03,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:02:03,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:02:03,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 106 transitions. [2024-06-21 20:02:03,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4061302681992337 [2024-06-21 20:02:03,327 INFO L175 Difference]: Start difference. First operand has 52 places, 34 transitions, 218 flow. Second operand 9 states and 106 transitions. [2024-06-21 20:02:03,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 59 transitions, 419 flow [2024-06-21 20:02:03,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 59 transitions, 391 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 20:02:03,331 INFO L231 Difference]: Finished difference. Result has 55 places, 39 transitions, 266 flow [2024-06-21 20:02:03,331 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} [2024-06-21 20:02:03,333 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 24 predicate places. [2024-06-21 20:02:03,333 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 39 transitions, 266 flow [2024-06-21 20:02:03,334 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) [2024-06-21 20:02:03,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:03,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:03,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 20:02:03,334 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)] === [2024-06-21 20:02:03,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:03,335 INFO L85 PathProgramCache]: Analyzing trace with hash -640220558, now seen corresponding path program 2 times [2024-06-21 20:02:03,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:03,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598902734] [2024-06-21 20:02:03,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:03,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:03,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:03,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:03,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:03,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598902734] [2024-06-21 20:02:03,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598902734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:03,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:03,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:02:03,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047984311] [2024-06-21 20:02:03,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:03,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:02:03,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:03,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:02:03,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:02:03,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 20:02:03,583 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) [2024-06-21 20:02:03,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:03,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 20:02:03,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:03,687 INFO L124 PetriNetUnfolderBase]: 166/314 cut-off events. [2024-06-21 20:02:03,688 INFO L125 PetriNetUnfolderBase]: For 808/812 co-relation queries the response was YES. [2024-06-21 20:02:03,689 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. [2024-06-21 20:02:03,690 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 38 selfloop transitions, 17 changer transitions 1/59 dead transitions. [2024-06-21 20:02:03,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 59 transitions, 482 flow [2024-06-21 20:02:03,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:02:03,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:02:03,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 100 transitions. [2024-06-21 20:02:03,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3831417624521073 [2024-06-21 20:02:03,692 INFO L175 Difference]: Start difference. First operand has 55 places, 39 transitions, 266 flow. Second operand 9 states and 100 transitions. [2024-06-21 20:02:03,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 59 transitions, 482 flow [2024-06-21 20:02:03,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 59 transitions, 441 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 20:02:03,695 INFO L231 Difference]: Finished difference. Result has 60 places, 46 transitions, 344 flow [2024-06-21 20:02:03,695 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} [2024-06-21 20:02:03,696 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 29 predicate places. [2024-06-21 20:02:03,696 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 46 transitions, 344 flow [2024-06-21 20:02:03,696 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) [2024-06-21 20:02:03,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:03,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:03,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 20:02:03,697 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)] === [2024-06-21 20:02:03,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:03,697 INFO L85 PathProgramCache]: Analyzing trace with hash -834086502, now seen corresponding path program 3 times [2024-06-21 20:02:03,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:03,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898635167] [2024-06-21 20:02:03,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:03,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:03,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:03,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:03,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:03,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898635167] [2024-06-21 20:02:03,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898635167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:03,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:03,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:02:03,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494396955] [2024-06-21 20:02:03,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:03,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:02:03,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:03,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:02:03,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:02:03,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 20:02:03,925 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) [2024-06-21 20:02:03,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:03,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 20:02:03,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:04,017 INFO L124 PetriNetUnfolderBase]: 172/327 cut-off events. [2024-06-21 20:02:04,018 INFO L125 PetriNetUnfolderBase]: For 984/992 co-relation queries the response was YES. [2024-06-21 20:02:04,018 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. [2024-06-21 20:02:04,020 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 44 selfloop transitions, 19 changer transitions 1/67 dead transitions. [2024-06-21 20:02:04,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 67 transitions, 562 flow [2024-06-21 20:02:04,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:02:04,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:02:04,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 102 transitions. [2024-06-21 20:02:04,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39080459770114945 [2024-06-21 20:02:04,021 INFO L175 Difference]: Start difference. First operand has 60 places, 46 transitions, 344 flow. Second operand 9 states and 102 transitions. [2024-06-21 20:02:04,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 67 transitions, 562 flow [2024-06-21 20:02:04,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 67 transitions, 535 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 20:02:04,024 INFO L231 Difference]: Finished difference. Result has 67 places, 51 transitions, 417 flow [2024-06-21 20:02:04,024 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} [2024-06-21 20:02:04,025 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 36 predicate places. [2024-06-21 20:02:04,025 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 51 transitions, 417 flow [2024-06-21 20:02:04,025 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) [2024-06-21 20:02:04,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:04,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:04,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 20:02:04,026 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)] === [2024-06-21 20:02:04,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:04,026 INFO L85 PathProgramCache]: Analyzing trace with hash -639625912, now seen corresponding path program 4 times [2024-06-21 20:02:04,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:04,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906916363] [2024-06-21 20:02:04,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:04,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:04,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:04,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:04,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:04,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906916363] [2024-06-21 20:02:04,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906916363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:04,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:04,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:02:04,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971532454] [2024-06-21 20:02:04,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:04,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:02:04,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:04,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:02:04,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:02:04,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 20:02:04,268 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) [2024-06-21 20:02:04,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:04,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 20:02:04,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:04,349 INFO L124 PetriNetUnfolderBase]: 178/339 cut-off events. [2024-06-21 20:02:04,350 INFO L125 PetriNetUnfolderBase]: For 1234/1238 co-relation queries the response was YES. [2024-06-21 20:02:04,350 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. [2024-06-21 20:02:04,352 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 48 selfloop transitions, 19 changer transitions 1/71 dead transitions. [2024-06-21 20:02:04,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 71 transitions, 647 flow [2024-06-21 20:02:04,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:02:04,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:02:04,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 103 transitions. [2024-06-21 20:02:04,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3946360153256705 [2024-06-21 20:02:04,353 INFO L175 Difference]: Start difference. First operand has 67 places, 51 transitions, 417 flow. Second operand 9 states and 103 transitions. [2024-06-21 20:02:04,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 71 transitions, 647 flow [2024-06-21 20:02:04,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 71 transitions, 605 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 20:02:04,358 INFO L231 Difference]: Finished difference. Result has 72 places, 55 transitions, 471 flow [2024-06-21 20:02:04,358 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} [2024-06-21 20:02:04,359 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 41 predicate places. [2024-06-21 20:02:04,359 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 55 transitions, 471 flow [2024-06-21 20:02:04,359 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) [2024-06-21 20:02:04,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:04,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:04,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 20:02:04,360 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)] === [2024-06-21 20:02:04,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:04,361 INFO L85 PathProgramCache]: Analyzing trace with hash -644982158, now seen corresponding path program 5 times [2024-06-21 20:02:04,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:04,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538244186] [2024-06-21 20:02:04,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:04,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:04,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:04,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:04,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:04,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538244186] [2024-06-21 20:02:04,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538244186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:04,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:04,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:02:04,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479320690] [2024-06-21 20:02:04,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:04,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:02:04,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:04,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:02:04,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:02:04,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 20:02:04,580 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) [2024-06-21 20:02:04,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:04,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 20:02:04,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:04,681 INFO L124 PetriNetUnfolderBase]: 181/341 cut-off events. [2024-06-21 20:02:04,681 INFO L125 PetriNetUnfolderBase]: For 1490/1490 co-relation queries the response was YES. [2024-06-21 20:02:04,682 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. [2024-06-21 20:02:04,683 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 47 selfloop transitions, 20 changer transitions 1/71 dead transitions. [2024-06-21 20:02:04,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 71 transitions, 687 flow [2024-06-21 20:02:04,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:02:04,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:02:04,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 99 transitions. [2024-06-21 20:02:04,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-06-21 20:02:04,684 INFO L175 Difference]: Start difference. First operand has 72 places, 55 transitions, 471 flow. Second operand 9 states and 99 transitions. [2024-06-21 20:02:04,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 71 transitions, 687 flow [2024-06-21 20:02:04,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 71 transitions, 647 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 20:02:04,689 INFO L231 Difference]: Finished difference. Result has 77 places, 58 transitions, 519 flow [2024-06-21 20:02:04,690 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} [2024-06-21 20:02:04,690 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 46 predicate places. [2024-06-21 20:02:04,690 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 58 transitions, 519 flow [2024-06-21 20:02:04,690 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) [2024-06-21 20:02:04,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:04,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:04,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 20:02:04,691 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)] === [2024-06-21 20:02:04,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:04,691 INFO L85 PathProgramCache]: Analyzing trace with hash -466836938, now seen corresponding path program 6 times [2024-06-21 20:02:04,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:04,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925668800] [2024-06-21 20:02:04,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:04,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:04,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:04,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:04,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:04,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925668800] [2024-06-21 20:02:04,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925668800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:04,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:04,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:02:04,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487613730] [2024-06-21 20:02:04,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:04,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:02:04,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:04,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:02:04,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:02:04,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 20:02:04,882 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) [2024-06-21 20:02:04,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:04,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 20:02:04,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:04,970 INFO L124 PetriNetUnfolderBase]: 181/340 cut-off events. [2024-06-21 20:02:04,971 INFO L125 PetriNetUnfolderBase]: For 1750/1754 co-relation queries the response was YES. [2024-06-21 20:02:04,971 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. [2024-06-21 20:02:04,973 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 49 selfloop transitions, 22 changer transitions 1/75 dead transitions. [2024-06-21 20:02:04,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 75 transitions, 755 flow [2024-06-21 20:02:04,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:02:04,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:02:04,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 101 transitions. [2024-06-21 20:02:04,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38697318007662834 [2024-06-21 20:02:04,974 INFO L175 Difference]: Start difference. First operand has 77 places, 58 transitions, 519 flow. Second operand 9 states and 101 transitions. [2024-06-21 20:02:04,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 75 transitions, 755 flow [2024-06-21 20:02:04,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 75 transitions, 699 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 20:02:04,979 INFO L231 Difference]: Finished difference. Result has 82 places, 62 transitions, 578 flow [2024-06-21 20:02:04,979 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} [2024-06-21 20:02:04,979 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 51 predicate places. [2024-06-21 20:02:04,980 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 62 transitions, 578 flow [2024-06-21 20:02:04,980 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) [2024-06-21 20:02:04,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:04,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:04,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 20:02:04,980 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)] === [2024-06-21 20:02:04,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:04,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1467999858, now seen corresponding path program 1 times [2024-06-21 20:02:04,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:04,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009116431] [2024-06-21 20:02:04,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:04,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:04,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:05,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:05,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:05,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009116431] [2024-06-21 20:02:05,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009116431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:05,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:05,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:02:05,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362580652] [2024-06-21 20:02:05,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:05,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:02:05,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:05,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:02:05,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:02:05,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 20:02:05,259 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) [2024-06-21 20:02:05,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:05,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 20:02:05,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:05,394 INFO L124 PetriNetUnfolderBase]: 199/376 cut-off events. [2024-06-21 20:02:05,394 INFO L125 PetriNetUnfolderBase]: For 2368/2372 co-relation queries the response was YES. [2024-06-21 20:02:05,395 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. [2024-06-21 20:02:05,396 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 63 selfloop transitions, 26 changer transitions 1/93 dead transitions. [2024-06-21 20:02:05,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 93 transitions, 952 flow [2024-06-21 20:02:05,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:02:05,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:02:05,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 121 transitions. [2024-06-21 20:02:05,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41724137931034483 [2024-06-21 20:02:05,398 INFO L175 Difference]: Start difference. First operand has 82 places, 62 transitions, 578 flow. Second operand 10 states and 121 transitions. [2024-06-21 20:02:05,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 93 transitions, 952 flow [2024-06-21 20:02:05,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 93 transitions, 869 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 20:02:05,405 INFO L231 Difference]: Finished difference. Result has 84 places, 64 transitions, 579 flow [2024-06-21 20:02:05,405 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} [2024-06-21 20:02:05,406 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 53 predicate places. [2024-06-21 20:02:05,406 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 64 transitions, 579 flow [2024-06-21 20:02:05,406 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) [2024-06-21 20:02:05,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:05,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:05,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 20:02:05,407 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)] === [2024-06-21 20:02:05,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:05,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1992088830, now seen corresponding path program 2 times [2024-06-21 20:02:05,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:05,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634761447] [2024-06-21 20:02:05,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:05,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:05,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:05,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:05,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:05,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634761447] [2024-06-21 20:02:05,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634761447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:05,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:05,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:02:05,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013214049] [2024-06-21 20:02:05,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:05,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:02:05,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:05,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:02:05,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:02:05,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 20:02:05,663 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) [2024-06-21 20:02:05,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:05,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 20:02:05,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:05,811 INFO L124 PetriNetUnfolderBase]: 217/410 cut-off events. [2024-06-21 20:02:05,811 INFO L125 PetriNetUnfolderBase]: For 2951/2955 co-relation queries the response was YES. [2024-06-21 20:02:05,812 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. [2024-06-21 20:02:05,814 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 63 selfloop transitions, 25 changer transitions 1/92 dead transitions. [2024-06-21 20:02:05,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 92 transitions, 921 flow [2024-06-21 20:02:05,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:02:05,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:02:05,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2024-06-21 20:02:05,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4103448275862069 [2024-06-21 20:02:05,816 INFO L175 Difference]: Start difference. First operand has 84 places, 64 transitions, 579 flow. Second operand 10 states and 119 transitions. [2024-06-21 20:02:05,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 92 transitions, 921 flow [2024-06-21 20:02:05,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 92 transitions, 854 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 20:02:05,823 INFO L231 Difference]: Finished difference. Result has 86 places, 66 transitions, 602 flow [2024-06-21 20:02:05,823 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} [2024-06-21 20:02:05,824 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 55 predicate places. [2024-06-21 20:02:05,824 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 66 transitions, 602 flow [2024-06-21 20:02:05,824 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) [2024-06-21 20:02:05,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:05,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:05,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 20:02:05,825 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)] === [2024-06-21 20:02:05,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:05,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1992085110, now seen corresponding path program 3 times [2024-06-21 20:02:05,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:05,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403062139] [2024-06-21 20:02:05,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:05,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:05,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:06,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:06,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:06,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403062139] [2024-06-21 20:02:06,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403062139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:06,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:06,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:02:06,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993224166] [2024-06-21 20:02:06,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:06,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:02:06,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:06,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:02:06,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:02:06,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 20:02:06,105 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) [2024-06-21 20:02:06,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:06,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 20:02:06,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:06,233 INFO L124 PetriNetUnfolderBase]: 226/425 cut-off events. [2024-06-21 20:02:06,234 INFO L125 PetriNetUnfolderBase]: For 3312/3316 co-relation queries the response was YES. [2024-06-21 20:02:06,235 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. [2024-06-21 20:02:06,237 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 60 selfloop transitions, 26 changer transitions 1/90 dead transitions. [2024-06-21 20:02:06,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 90 transitions, 897 flow [2024-06-21 20:02:06,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:02:06,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:02:06,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 117 transitions. [2024-06-21 20:02:06,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40344827586206894 [2024-06-21 20:02:06,238 INFO L175 Difference]: Start difference. First operand has 86 places, 66 transitions, 602 flow. Second operand 10 states and 117 transitions. [2024-06-21 20:02:06,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 90 transitions, 897 flow [2024-06-21 20:02:06,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 90 transitions, 849 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 20:02:06,244 INFO L231 Difference]: Finished difference. Result has 89 places, 67 transitions, 633 flow [2024-06-21 20:02:06,245 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} [2024-06-21 20:02:06,245 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 58 predicate places. [2024-06-21 20:02:06,246 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 67 transitions, 633 flow [2024-06-21 20:02:06,246 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) [2024-06-21 20:02:06,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:06,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:06,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 20:02:06,246 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)] === [2024-06-21 20:02:06,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:06,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1992084955, now seen corresponding path program 1 times [2024-06-21 20:02:06,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:06,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659340555] [2024-06-21 20:02:06,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:06,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:06,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:06,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:06,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:06,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659340555] [2024-06-21 20:02:06,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659340555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:06,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:06,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:02:06,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284484909] [2024-06-21 20:02:06,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:06,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:02:06,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:06,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:02:06,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:02:06,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 20:02:06,529 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) [2024-06-21 20:02:06,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:06,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 20:02:06,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:06,669 INFO L124 PetriNetUnfolderBase]: 235/444 cut-off events. [2024-06-21 20:02:06,669 INFO L125 PetriNetUnfolderBase]: For 3796/3796 co-relation queries the response was YES. [2024-06-21 20:02:06,670 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. [2024-06-21 20:02:06,672 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 61 selfloop transitions, 26 changer transitions 1/91 dead transitions. [2024-06-21 20:02:06,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 91 transitions, 909 flow [2024-06-21 20:02:06,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:02:06,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:02:06,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 117 transitions. [2024-06-21 20:02:06,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40344827586206894 [2024-06-21 20:02:06,674 INFO L175 Difference]: Start difference. First operand has 89 places, 67 transitions, 633 flow. Second operand 10 states and 117 transitions. [2024-06-21 20:02:06,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 91 transitions, 909 flow [2024-06-21 20:02:06,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 91 transitions, 855 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 20:02:06,681 INFO L231 Difference]: Finished difference. Result has 91 places, 68 transitions, 653 flow [2024-06-21 20:02:06,681 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} [2024-06-21 20:02:06,682 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 60 predicate places. [2024-06-21 20:02:06,682 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 68 transitions, 653 flow [2024-06-21 20:02:06,682 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) [2024-06-21 20:02:06,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:06,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:06,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 20:02:06,682 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)] === [2024-06-21 20:02:06,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:06,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1498824425, now seen corresponding path program 2 times [2024-06-21 20:02:06,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:06,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476342263] [2024-06-21 20:02:06,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:06,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:06,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:06,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:06,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:06,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476342263] [2024-06-21 20:02:06,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476342263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:06,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:06,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:02:06,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085563491] [2024-06-21 20:02:06,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:06,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:02:06,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:06,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:02:06,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:02:06,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 20:02:06,941 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) [2024-06-21 20:02:06,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:06,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 20:02:06,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:07,083 INFO L124 PetriNetUnfolderBase]: 244/459 cut-off events. [2024-06-21 20:02:07,084 INFO L125 PetriNetUnfolderBase]: For 4098/4098 co-relation queries the response was YES. [2024-06-21 20:02:07,085 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. [2024-06-21 20:02:07,087 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 64 selfloop transitions, 21 changer transitions 1/89 dead transitions. [2024-06-21 20:02:07,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 89 transitions, 919 flow [2024-06-21 20:02:07,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:02:07,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:02:07,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-06-21 20:02:07,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3896551724137931 [2024-06-21 20:02:07,088 INFO L175 Difference]: Start difference. First operand has 91 places, 68 transitions, 653 flow. Second operand 10 states and 113 transitions. [2024-06-21 20:02:07,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 89 transitions, 919 flow [2024-06-21 20:02:07,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 89 transitions, 857 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 20:02:07,096 INFO L231 Difference]: Finished difference. Result has 93 places, 69 transitions, 657 flow [2024-06-21 20:02:07,096 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} [2024-06-21 20:02:07,096 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 62 predicate places. [2024-06-21 20:02:07,096 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 69 transitions, 657 flow [2024-06-21 20:02:07,097 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) [2024-06-21 20:02:07,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:07,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:07,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 20:02:07,097 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)] === [2024-06-21 20:02:07,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:07,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1640029890, now seen corresponding path program 4 times [2024-06-21 20:02:07,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:07,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231339782] [2024-06-21 20:02:07,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:07,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:07,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:07,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:07,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:07,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231339782] [2024-06-21 20:02:07,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231339782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:07,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:07,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:02:07,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360788658] [2024-06-21 20:02:07,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:07,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:02:07,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:07,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:02:07,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:02:07,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 20:02:07,306 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) [2024-06-21 20:02:07,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:07,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 20:02:07,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:07,414 INFO L124 PetriNetUnfolderBase]: 262/491 cut-off events. [2024-06-21 20:02:07,415 INFO L125 PetriNetUnfolderBase]: For 4948/4952 co-relation queries the response was YES. [2024-06-21 20:02:07,416 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. [2024-06-21 20:02:07,418 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 70 selfloop transitions, 20 changer transitions 1/94 dead transitions. [2024-06-21 20:02:07,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 94 transitions, 1007 flow [2024-06-21 20:02:07,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:02:07,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:02:07,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2024-06-21 20:02:07,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39655172413793105 [2024-06-21 20:02:07,419 INFO L175 Difference]: Start difference. First operand has 93 places, 69 transitions, 657 flow. Second operand 10 states and 115 transitions. [2024-06-21 20:02:07,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 94 transitions, 1007 flow [2024-06-21 20:02:07,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 94 transitions, 953 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-21 20:02:07,428 INFO L231 Difference]: Finished difference. Result has 96 places, 71 transitions, 687 flow [2024-06-21 20:02:07,428 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} [2024-06-21 20:02:07,429 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 65 predicate places. [2024-06-21 20:02:07,429 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 71 transitions, 687 flow [2024-06-21 20:02:07,429 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) [2024-06-21 20:02:07,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:07,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:07,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 20:02:07,430 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)] === [2024-06-21 20:02:07,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:07,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1498824270, now seen corresponding path program 5 times [2024-06-21 20:02:07,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:07,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390147123] [2024-06-21 20:02:07,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:07,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:07,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:07,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:07,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:07,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390147123] [2024-06-21 20:02:07,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390147123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:07,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:07,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:02:07,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407794002] [2024-06-21 20:02:07,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:07,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:02:07,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:07,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:02:07,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:02:07,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 20:02:07,664 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) [2024-06-21 20:02:07,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:07,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 20:02:07,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:07,783 INFO L124 PetriNetUnfolderBase]: 271/508 cut-off events. [2024-06-21 20:02:07,783 INFO L125 PetriNetUnfolderBase]: For 5670/5674 co-relation queries the response was YES. [2024-06-21 20:02:07,784 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. [2024-06-21 20:02:07,787 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 67 selfloop transitions, 21 changer transitions 1/92 dead transitions. [2024-06-21 20:02:07,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 92 transitions, 986 flow [2024-06-21 20:02:07,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:02:07,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:02:07,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-06-21 20:02:07,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3896551724137931 [2024-06-21 20:02:07,788 INFO L175 Difference]: Start difference. First operand has 96 places, 71 transitions, 687 flow. Second operand 10 states and 113 transitions. [2024-06-21 20:02:07,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 92 transitions, 986 flow [2024-06-21 20:02:07,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 92 transitions, 942 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 20:02:07,799 INFO L231 Difference]: Finished difference. Result has 99 places, 72 transitions, 716 flow [2024-06-21 20:02:07,799 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} [2024-06-21 20:02:07,800 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 68 predicate places. [2024-06-21 20:02:07,800 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 72 transitions, 716 flow [2024-06-21 20:02:07,801 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) [2024-06-21 20:02:07,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:07,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:07,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 20:02:07,801 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)] === [2024-06-21 20:02:07,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:07,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1646670245, now seen corresponding path program 3 times [2024-06-21 20:02:07,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:07,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928453339] [2024-06-21 20:02:07,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:07,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:07,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:08,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:08,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:08,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928453339] [2024-06-21 20:02:08,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928453339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:08,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:08,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:02:08,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745391134] [2024-06-21 20:02:08,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:08,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:02:08,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:08,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:02:08,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:02:08,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 20:02:08,043 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) [2024-06-21 20:02:08,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:08,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 20:02:08,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:08,169 INFO L124 PetriNetUnfolderBase]: 289/542 cut-off events. [2024-06-21 20:02:08,170 INFO L125 PetriNetUnfolderBase]: For 6153/6157 co-relation queries the response was YES. [2024-06-21 20:02:08,171 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. [2024-06-21 20:02:08,173 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 74 selfloop transitions, 19 changer transitions 1/97 dead transitions. [2024-06-21 20:02:08,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 97 transitions, 1027 flow [2024-06-21 20:02:08,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:02:08,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:02:08,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 116 transitions. [2024-06-21 20:02:08,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 20:02:08,175 INFO L175 Difference]: Start difference. First operand has 99 places, 72 transitions, 716 flow. Second operand 10 states and 116 transitions. [2024-06-21 20:02:08,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 97 transitions, 1027 flow [2024-06-21 20:02:08,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 97 transitions, 977 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 20:02:08,185 INFO L231 Difference]: Finished difference. Result has 102 places, 74 transitions, 743 flow [2024-06-21 20:02:08,186 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} [2024-06-21 20:02:08,186 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 71 predicate places. [2024-06-21 20:02:08,186 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 74 transitions, 743 flow [2024-06-21 20:02:08,186 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) [2024-06-21 20:02:08,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:08,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:08,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 20:02:08,187 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)] === [2024-06-21 20:02:08,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:08,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1646433870, now seen corresponding path program 6 times [2024-06-21 20:02:08,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:08,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584994815] [2024-06-21 20:02:08,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:08,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:08,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:08,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:08,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:08,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584994815] [2024-06-21 20:02:08,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584994815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:08,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:08,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:02:08,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537690715] [2024-06-21 20:02:08,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:08,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:02:08,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:08,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:02:08,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:02:08,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 20:02:08,422 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) [2024-06-21 20:02:08,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:08,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 20:02:08,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:08,560 INFO L124 PetriNetUnfolderBase]: 298/559 cut-off events. [2024-06-21 20:02:08,560 INFO L125 PetriNetUnfolderBase]: For 7239/7243 co-relation queries the response was YES. [2024-06-21 20:02:08,562 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. [2024-06-21 20:02:08,565 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 70 selfloop transitions, 21 changer transitions 1/95 dead transitions. [2024-06-21 20:02:08,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 95 transitions, 1056 flow [2024-06-21 20:02:08,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:02:08,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:02:08,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-06-21 20:02:08,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3896551724137931 [2024-06-21 20:02:08,566 INFO L175 Difference]: Start difference. First operand has 102 places, 74 transitions, 743 flow. Second operand 10 states and 113 transitions. [2024-06-21 20:02:08,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 95 transitions, 1056 flow [2024-06-21 20:02:08,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 95 transitions, 1013 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 20:02:08,579 INFO L231 Difference]: Finished difference. Result has 106 places, 75 transitions, 775 flow [2024-06-21 20:02:08,579 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} [2024-06-21 20:02:08,580 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 75 predicate places. [2024-06-21 20:02:08,580 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 75 transitions, 775 flow [2024-06-21 20:02:08,580 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) [2024-06-21 20:02:08,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:08,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:08,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 20:02:08,581 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)] === [2024-06-21 20:02:08,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:08,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1933848355, now seen corresponding path program 4 times [2024-06-21 20:02:08,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:08,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131518090] [2024-06-21 20:02:08,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:08,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:08,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:08,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:08,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:08,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131518090] [2024-06-21 20:02:08,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131518090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:08,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:08,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:02:08,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372460583] [2024-06-21 20:02:08,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:08,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:02:08,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:08,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:02:08,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:02:08,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 20:02:08,828 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) [2024-06-21 20:02:08,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:08,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 20:02:08,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:08,958 INFO L124 PetriNetUnfolderBase]: 307/574 cut-off events. [2024-06-21 20:02:08,958 INFO L125 PetriNetUnfolderBase]: For 7631/7631 co-relation queries the response was YES. [2024-06-21 20:02:08,960 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. [2024-06-21 20:02:08,963 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 71 selfloop transitions, 21 changer transitions 1/96 dead transitions. [2024-06-21 20:02:08,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 96 transitions, 1061 flow [2024-06-21 20:02:08,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:02:08,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:02:08,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-06-21 20:02:08,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3896551724137931 [2024-06-21 20:02:08,965 INFO L175 Difference]: Start difference. First operand has 106 places, 75 transitions, 775 flow. Second operand 10 states and 113 transitions. [2024-06-21 20:02:08,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 96 transitions, 1061 flow [2024-06-21 20:02:08,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 96 transitions, 1011 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 20:02:08,977 INFO L231 Difference]: Finished difference. Result has 108 places, 76 transitions, 795 flow [2024-06-21 20:02:08,977 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} [2024-06-21 20:02:08,978 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 77 predicate places. [2024-06-21 20:02:08,978 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 76 transitions, 795 flow [2024-06-21 20:02:08,978 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) [2024-06-21 20:02:08,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:08,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:08,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 20:02:08,979 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)] === [2024-06-21 20:02:08,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:08,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1808451193, now seen corresponding path program 5 times [2024-06-21 20:02:08,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:08,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991624683] [2024-06-21 20:02:08,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:08,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:08,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:09,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:09,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:09,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991624683] [2024-06-21 20:02:09,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991624683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:09,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:09,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:02:09,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336881775] [2024-06-21 20:02:09,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:09,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:02:09,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:09,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:02:09,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:02:09,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 20:02:09,217 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) [2024-06-21 20:02:09,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:09,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 20:02:09,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:09,344 INFO L124 PetriNetUnfolderBase]: 325/606 cut-off events. [2024-06-21 20:02:09,345 INFO L125 PetriNetUnfolderBase]: For 8497/8497 co-relation queries the response was YES. [2024-06-21 20:02:09,346 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. [2024-06-21 20:02:09,352 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 74 selfloop transitions, 20 changer transitions 1/98 dead transitions. [2024-06-21 20:02:09,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 98 transitions, 1107 flow [2024-06-21 20:02:09,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:02:09,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:02:09,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-06-21 20:02:09,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3896551724137931 [2024-06-21 20:02:09,354 INFO L175 Difference]: Start difference. First operand has 108 places, 76 transitions, 795 flow. Second operand 10 states and 113 transitions. [2024-06-21 20:02:09,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 98 transitions, 1107 flow [2024-06-21 20:02:09,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 98 transitions, 1047 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-21 20:02:09,368 INFO L231 Difference]: Finished difference. Result has 111 places, 78 transitions, 819 flow [2024-06-21 20:02:09,368 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} [2024-06-21 20:02:09,369 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 80 predicate places. [2024-06-21 20:02:09,369 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 78 transitions, 819 flow [2024-06-21 20:02:09,369 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) [2024-06-21 20:02:09,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:09,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:09,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 20:02:09,370 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)] === [2024-06-21 20:02:09,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:09,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1808687413, now seen corresponding path program 6 times [2024-06-21 20:02:09,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:09,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815904357] [2024-06-21 20:02:09,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:09,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:09,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:09,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:09,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:09,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815904357] [2024-06-21 20:02:09,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815904357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:09,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:09,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:02:09,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366860904] [2024-06-21 20:02:09,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:09,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:02:09,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:09,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:02:09,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:02:09,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 20:02:09,692 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) [2024-06-21 20:02:09,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:09,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 20:02:09,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:09,819 INFO L124 PetriNetUnfolderBase]: 334/623 cut-off events. [2024-06-21 20:02:09,819 INFO L125 PetriNetUnfolderBase]: For 9449/9449 co-relation queries the response was YES. [2024-06-21 20:02:09,821 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. [2024-06-21 20:02:09,824 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 70 selfloop transitions, 22 changer transitions 1/96 dead transitions. [2024-06-21 20:02:09,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 96 transitions, 1103 flow [2024-06-21 20:02:09,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:02:09,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:02:09,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-21 20:02:09,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-06-21 20:02:09,826 INFO L175 Difference]: Start difference. First operand has 111 places, 78 transitions, 819 flow. Second operand 10 states and 110 transitions. [2024-06-21 20:02:09,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 96 transitions, 1103 flow [2024-06-21 20:02:09,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 96 transitions, 1055 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 20:02:09,840 INFO L231 Difference]: Finished difference. Result has 115 places, 79 transitions, 847 flow [2024-06-21 20:02:09,840 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} [2024-06-21 20:02:09,841 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 84 predicate places. [2024-06-21 20:02:09,841 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 79 transitions, 847 flow [2024-06-21 20:02:09,841 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) [2024-06-21 20:02:09,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:09,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:09,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 20:02:09,842 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)] === [2024-06-21 20:02:09,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:09,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1808687568, now seen corresponding path program 7 times [2024-06-21 20:02:09,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:09,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321335305] [2024-06-21 20:02:09,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:09,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:09,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:10,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:10,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:10,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321335305] [2024-06-21 20:02:10,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321335305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:10,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:10,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:02:10,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50095718] [2024-06-21 20:02:10,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:10,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:02:10,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:10,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:02:10,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:02:10,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 20:02:10,081 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) [2024-06-21 20:02:10,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:10,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 20:02:10,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:10,249 INFO L124 PetriNetUnfolderBase]: 343/638 cut-off events. [2024-06-21 20:02:10,249 INFO L125 PetriNetUnfolderBase]: For 10520/10524 co-relation queries the response was YES. [2024-06-21 20:02:10,252 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. [2024-06-21 20:02:10,261 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 71 selfloop transitions, 22 changer transitions 1/97 dead transitions. [2024-06-21 20:02:10,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 97 transitions, 1168 flow [2024-06-21 20:02:10,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:02:10,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:02:10,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-21 20:02:10,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-06-21 20:02:10,262 INFO L175 Difference]: Start difference. First operand has 115 places, 79 transitions, 847 flow. Second operand 10 states and 110 transitions. [2024-06-21 20:02:10,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 97 transitions, 1168 flow [2024-06-21 20:02:10,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 97 transitions, 1104 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-21 20:02:10,280 INFO L231 Difference]: Finished difference. Result has 117 places, 80 transitions, 862 flow [2024-06-21 20:02:10,280 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} [2024-06-21 20:02:10,281 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 86 predicate places. [2024-06-21 20:02:10,281 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 80 transitions, 862 flow [2024-06-21 20:02:10,281 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) [2024-06-21 20:02:10,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:10,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:10,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 20:02:10,282 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)] === [2024-06-21 20:02:10,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:10,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1480328864, now seen corresponding path program 8 times [2024-06-21 20:02:10,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:10,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030705294] [2024-06-21 20:02:10,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:10,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:10,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:10,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:10,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:10,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030705294] [2024-06-21 20:02:10,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030705294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:10,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:10,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:02:10,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243026502] [2024-06-21 20:02:10,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:10,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:02:10,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:10,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:02:10,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:02:10,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 20:02:10,556 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) [2024-06-21 20:02:10,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:10,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 20:02:10,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:10,707 INFO L124 PetriNetUnfolderBase]: 352/655 cut-off events. [2024-06-21 20:02:10,707 INFO L125 PetriNetUnfolderBase]: For 11310/11314 co-relation queries the response was YES. [2024-06-21 20:02:10,709 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. [2024-06-21 20:02:10,711 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 75 selfloop transitions, 22 changer transitions 1/101 dead transitions. [2024-06-21 20:02:10,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 101 transitions, 1243 flow [2024-06-21 20:02:10,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:02:10,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:02:10,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 112 transitions. [2024-06-21 20:02:10,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38620689655172413 [2024-06-21 20:02:10,713 INFO L175 Difference]: Start difference. First operand has 117 places, 80 transitions, 862 flow. Second operand 10 states and 112 transitions. [2024-06-21 20:02:10,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 101 transitions, 1243 flow [2024-06-21 20:02:10,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 101 transitions, 1189 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 20:02:10,729 INFO L231 Difference]: Finished difference. Result has 119 places, 81 transitions, 889 flow [2024-06-21 20:02:10,729 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} [2024-06-21 20:02:10,729 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 88 predicate places. [2024-06-21 20:02:10,729 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 81 transitions, 889 flow [2024-06-21 20:02:10,730 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) [2024-06-21 20:02:10,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:10,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:10,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 20:02:10,730 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)] === [2024-06-21 20:02:10,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:10,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1480390399, now seen corresponding path program 7 times [2024-06-21 20:02:10,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:10,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602443428] [2024-06-21 20:02:10,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:10,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:10,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:10,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:10,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:10,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602443428] [2024-06-21 20:02:10,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602443428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:10,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:10,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:02:10,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517620210] [2024-06-21 20:02:10,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:10,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:02:10,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:10,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:02:10,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:02:10,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 20:02:10,977 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) [2024-06-21 20:02:10,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:10,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 20:02:10,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:11,114 INFO L124 PetriNetUnfolderBase]: 361/670 cut-off events. [2024-06-21 20:02:11,114 INFO L125 PetriNetUnfolderBase]: For 11956/11960 co-relation queries the response was YES. [2024-06-21 20:02:11,117 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. [2024-06-21 20:02:11,119 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 72 selfloop transitions, 23 changer transitions 1/99 dead transitions. [2024-06-21 20:02:11,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 99 transitions, 1181 flow [2024-06-21 20:02:11,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:02:11,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:02:11,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-21 20:02:11,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-06-21 20:02:11,121 INFO L175 Difference]: Start difference. First operand has 119 places, 81 transitions, 889 flow. Second operand 10 states and 110 transitions. [2024-06-21 20:02:11,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 99 transitions, 1181 flow [2024-06-21 20:02:11,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 99 transitions, 1119 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-21 20:02:11,139 INFO L231 Difference]: Finished difference. Result has 120 places, 82 transitions, 907 flow [2024-06-21 20:02:11,139 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} [2024-06-21 20:02:11,139 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 89 predicate places. [2024-06-21 20:02:11,140 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 82 transitions, 907 flow [2024-06-21 20:02:11,140 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) [2024-06-21 20:02:11,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:11,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:11,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 20:02:11,140 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)] === [2024-06-21 20:02:11,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:11,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1815087828, now seen corresponding path program 9 times [2024-06-21 20:02:11,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:11,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80200535] [2024-06-21 20:02:11,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:11,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:11,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:11,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:11,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:11,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80200535] [2024-06-21 20:02:11,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80200535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:11,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:11,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:02:11,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664315301] [2024-06-21 20:02:11,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:11,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:02:11,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:11,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:02:11,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:02:11,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 20:02:11,385 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) [2024-06-21 20:02:11,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:11,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 20:02:11,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:11,519 INFO L124 PetriNetUnfolderBase]: 370/687 cut-off events. [2024-06-21 20:02:11,519 INFO L125 PetriNetUnfolderBase]: For 13355/13355 co-relation queries the response was YES. [2024-06-21 20:02:11,521 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. [2024-06-21 20:02:11,523 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 73 selfloop transitions, 23 changer transitions 1/100 dead transitions. [2024-06-21 20:02:11,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 100 transitions, 1240 flow [2024-06-21 20:02:11,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:02:11,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:02:11,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-21 20:02:11,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-06-21 20:02:11,524 INFO L175 Difference]: Start difference. First operand has 120 places, 82 transitions, 907 flow. Second operand 10 states and 110 transitions. [2024-06-21 20:02:11,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 100 transitions, 1240 flow [2024-06-21 20:02:11,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 100 transitions, 1172 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-21 20:02:11,541 INFO L231 Difference]: Finished difference. Result has 122 places, 83 transitions, 924 flow [2024-06-21 20:02:11,541 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} [2024-06-21 20:02:11,541 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 91 predicate places. [2024-06-21 20:02:11,541 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 83 transitions, 924 flow [2024-06-21 20:02:11,542 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) [2024-06-21 20:02:11,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:11,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:11,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 20:02:11,542 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)] === [2024-06-21 20:02:11,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:11,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1578762583, now seen corresponding path program 8 times [2024-06-21 20:02:11,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:11,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601612807] [2024-06-21 20:02:11,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:11,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:11,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:11,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:11,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:11,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601612807] [2024-06-21 20:02:11,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601612807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:11,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:11,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:02:11,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473298117] [2024-06-21 20:02:11,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:11,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:02:11,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:11,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:02:11,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:02:11,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 20:02:11,781 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) [2024-06-21 20:02:11,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:11,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 20:02:11,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:11,931 INFO L124 PetriNetUnfolderBase]: 388/721 cut-off events. [2024-06-21 20:02:11,931 INFO L125 PetriNetUnfolderBase]: For 13987/13987 co-relation queries the response was YES. [2024-06-21 20:02:11,933 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. [2024-06-21 20:02:11,935 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 76 selfloop transitions, 24 changer transitions 1/104 dead transitions. [2024-06-21 20:02:11,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 104 transitions, 1255 flow [2024-06-21 20:02:11,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:02:11,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:02:11,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 111 transitions. [2024-06-21 20:02:11,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38275862068965516 [2024-06-21 20:02:11,940 INFO L175 Difference]: Start difference. First operand has 122 places, 83 transitions, 924 flow. Second operand 10 states and 111 transitions. [2024-06-21 20:02:11,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 104 transitions, 1255 flow [2024-06-21 20:02:11,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 104 transitions, 1193 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-21 20:02:11,958 INFO L231 Difference]: Finished difference. Result has 125 places, 85 transitions, 961 flow [2024-06-21 20:02:11,959 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} [2024-06-21 20:02:11,962 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 94 predicate places. [2024-06-21 20:02:11,963 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 85 transitions, 961 flow [2024-06-21 20:02:11,963 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) [2024-06-21 20:02:11,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:11,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:11,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 20:02:11,963 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)] === [2024-06-21 20:02:11,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:11,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1586806153, now seen corresponding path program 9 times [2024-06-21 20:02:11,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:11,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776121355] [2024-06-21 20:02:11,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:11,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:11,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:12,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:12,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:12,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776121355] [2024-06-21 20:02:12,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776121355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:12,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:12,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:02:12,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768585329] [2024-06-21 20:02:12,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:12,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:02:12,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:12,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:02:12,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:02:12,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 20:02:12,225 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) [2024-06-21 20:02:12,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:12,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 20:02:12,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:12,353 INFO L124 PetriNetUnfolderBase]: 388/723 cut-off events. [2024-06-21 20:02:12,353 INFO L125 PetriNetUnfolderBase]: For 15345/15349 co-relation queries the response was YES. [2024-06-21 20:02:12,355 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. [2024-06-21 20:02:12,358 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 78 selfloop transitions, 24 changer transitions 0/105 dead transitions. [2024-06-21 20:02:12,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 105 transitions, 1273 flow [2024-06-21 20:02:12,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:02:12,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:02:12,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-06-21 20:02:12,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3896551724137931 [2024-06-21 20:02:12,359 INFO L175 Difference]: Start difference. First operand has 125 places, 85 transitions, 961 flow. Second operand 10 states and 113 transitions. [2024-06-21 20:02:12,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 105 transitions, 1273 flow [2024-06-21 20:02:12,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 105 transitions, 1186 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-21 20:02:12,380 INFO L231 Difference]: Finished difference. Result has 127 places, 86 transitions, 964 flow [2024-06-21 20:02:12,380 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} [2024-06-21 20:02:12,381 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 96 predicate places. [2024-06-21 20:02:12,381 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 86 transitions, 964 flow [2024-06-21 20:02:12,381 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) [2024-06-21 20:02:12,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:12,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:12,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 20:02:12,381 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)] === [2024-06-21 20:02:12,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:12,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1587042373, now seen corresponding path program 10 times [2024-06-21 20:02:12,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:12,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188546135] [2024-06-21 20:02:12,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:12,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:12,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:12,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:12,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:12,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188546135] [2024-06-21 20:02:12,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188546135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:12,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:12,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:02:12,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011657353] [2024-06-21 20:02:12,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:12,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:02:12,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:12,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:02:12,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:02:12,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 20:02:12,629 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) [2024-06-21 20:02:12,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:12,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 20:02:12,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:12,754 INFO L124 PetriNetUnfolderBase]: 397/738 cut-off events. [2024-06-21 20:02:12,754 INFO L125 PetriNetUnfolderBase]: For 16408/16412 co-relation queries the response was YES. [2024-06-21 20:02:12,756 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. [2024-06-21 20:02:12,758 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 74 selfloop transitions, 26 changer transitions 0/103 dead transitions. [2024-06-21 20:02:12,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 103 transitions, 1256 flow [2024-06-21 20:02:12,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:02:12,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:02:12,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-21 20:02:12,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-06-21 20:02:12,759 INFO L175 Difference]: Start difference. First operand has 127 places, 86 transitions, 964 flow. Second operand 10 states and 110 transitions. [2024-06-21 20:02:12,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 103 transitions, 1256 flow [2024-06-21 20:02:12,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 103 transitions, 1166 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-21 20:02:12,781 INFO L231 Difference]: Finished difference. Result has 128 places, 87 transitions, 966 flow [2024-06-21 20:02:12,782 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} [2024-06-21 20:02:12,782 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 97 predicate places. [2024-06-21 20:02:12,782 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 87 transitions, 966 flow [2024-06-21 20:02:12,782 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) [2024-06-21 20:02:12,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:12,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:12,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 20:02:12,783 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)] === [2024-06-21 20:02:12,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:12,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1587042528, now seen corresponding path program 10 times [2024-06-21 20:02:12,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:12,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855962578] [2024-06-21 20:02:12,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:12,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:12,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:12,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:12,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:12,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855962578] [2024-06-21 20:02:12,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855962578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:12,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:12,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:02:12,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765609586] [2024-06-21 20:02:12,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:12,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:02:12,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:12,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:02:12,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:02:13,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 20:02:13,024 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) [2024-06-21 20:02:13,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:13,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 20:02:13,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:13,139 INFO L124 PetriNetUnfolderBase]: 391/729 cut-off events. [2024-06-21 20:02:13,140 INFO L125 PetriNetUnfolderBase]: For 15414/15418 co-relation queries the response was YES. [2024-06-21 20:02:13,142 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. [2024-06-21 20:02:13,144 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 74 selfloop transitions, 26 changer transitions 0/103 dead transitions. [2024-06-21 20:02:13,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 103 transitions, 1268 flow [2024-06-21 20:02:13,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:02:13,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:02:13,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-21 20:02:13,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-06-21 20:02:13,146 INFO L175 Difference]: Start difference. First operand has 128 places, 87 transitions, 966 flow. Second operand 10 states and 110 transitions. [2024-06-21 20:02:13,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 103 transitions, 1268 flow [2024-06-21 20:02:13,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 103 transitions, 1188 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-21 20:02:13,169 INFO L231 Difference]: Finished difference. Result has 130 places, 87 transitions, 942 flow [2024-06-21 20:02:13,169 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} [2024-06-21 20:02:13,170 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 99 predicate places. [2024-06-21 20:02:13,170 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 87 transitions, 942 flow [2024-06-21 20:02:13,170 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) [2024-06-21 20:02:13,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:13,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:13,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 20:02:13,170 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)] === [2024-06-21 20:02:13,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:13,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1736643841, now seen corresponding path program 1 times [2024-06-21 20:02:13,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:13,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650001570] [2024-06-21 20:02:13,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:13,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:13,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:13,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:13,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:13,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650001570] [2024-06-21 20:02:13,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650001570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:13,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:13,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:02:13,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107513186] [2024-06-21 20:02:13,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:13,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:02:13,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:13,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:02:13,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:02:13,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 20:02:13,453 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) [2024-06-21 20:02:13,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:13,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 20:02:13,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:13,652 INFO L124 PetriNetUnfolderBase]: 418/784 cut-off events. [2024-06-21 20:02:13,653 INFO L125 PetriNetUnfolderBase]: For 18074/18078 co-relation queries the response was YES. [2024-06-21 20:02:13,655 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. [2024-06-21 20:02:13,657 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 70 selfloop transitions, 27 changer transitions 22/122 dead transitions. [2024-06-21 20:02:13,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 122 transitions, 1504 flow [2024-06-21 20:02:13,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:02:13,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:02:13,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 133 transitions. [2024-06-21 20:02:13,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4169278996865204 [2024-06-21 20:02:13,665 INFO L175 Difference]: Start difference. First operand has 130 places, 87 transitions, 942 flow. Second operand 11 states and 133 transitions. [2024-06-21 20:02:13,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 122 transitions, 1504 flow [2024-06-21 20:02:13,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 122 transitions, 1408 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-21 20:02:13,693 INFO L231 Difference]: Finished difference. Result has 132 places, 83 transitions, 860 flow [2024-06-21 20:02:13,694 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} [2024-06-21 20:02:13,694 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 101 predicate places. [2024-06-21 20:02:13,694 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 83 transitions, 860 flow [2024-06-21 20:02:13,694 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) [2024-06-21 20:02:13,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:13,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:13,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 20:02:13,695 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)] === [2024-06-21 20:02:13,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:13,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1626998229, now seen corresponding path program 2 times [2024-06-21 20:02:13,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:13,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18170600] [2024-06-21 20:02:13,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:13,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:13,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:13,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:13,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:13,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18170600] [2024-06-21 20:02:13,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18170600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:13,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:13,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:02:13,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048898512] [2024-06-21 20:02:13,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:13,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:02:13,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:13,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:02:13,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:02:13,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 20:02:13,977 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) [2024-06-21 20:02:13,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:13,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 20:02:13,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:14,144 INFO L124 PetriNetUnfolderBase]: 377/705 cut-off events. [2024-06-21 20:02:14,144 INFO L125 PetriNetUnfolderBase]: For 16016/16020 co-relation queries the response was YES. [2024-06-21 20:02:14,146 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. [2024-06-21 20:02:14,148 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 67 selfloop transitions, 24 changer transitions 18/112 dead transitions. [2024-06-21 20:02:14,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 112 transitions, 1332 flow [2024-06-21 20:02:14,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:02:14,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:02:14,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 127 transitions. [2024-06-21 20:02:14,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3981191222570533 [2024-06-21 20:02:14,150 INFO L175 Difference]: Start difference. First operand has 132 places, 83 transitions, 860 flow. Second operand 11 states and 127 transitions. [2024-06-21 20:02:14,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 112 transitions, 1332 flow [2024-06-21 20:02:14,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 112 transitions, 1262 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-21 20:02:14,172 INFO L231 Difference]: Finished difference. Result has 126 places, 80 transitions, 806 flow [2024-06-21 20:02:14,172 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} [2024-06-21 20:02:14,173 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 95 predicate places. [2024-06-21 20:02:14,173 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 80 transitions, 806 flow [2024-06-21 20:02:14,173 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) [2024-06-21 20:02:14,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:14,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:14,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 20:02:14,174 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)] === [2024-06-21 20:02:14,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:14,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1625095449, now seen corresponding path program 3 times [2024-06-21 20:02:14,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:14,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330719472] [2024-06-21 20:02:14,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:14,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:14,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:14,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:14,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:14,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330719472] [2024-06-21 20:02:14,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330719472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:14,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:14,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:02:14,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480066538] [2024-06-21 20:02:14,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:14,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:02:14,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:14,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:02:14,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:02:14,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 20:02:14,427 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) [2024-06-21 20:02:14,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:14,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 20:02:14,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:14,591 INFO L124 PetriNetUnfolderBase]: 357/669 cut-off events. [2024-06-21 20:02:14,591 INFO L125 PetriNetUnfolderBase]: For 15334/15334 co-relation queries the response was YES. [2024-06-21 20:02:14,593 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. [2024-06-21 20:02:14,595 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 65 selfloop transitions, 25 changer transitions 13/106 dead transitions. [2024-06-21 20:02:14,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 106 transitions, 1204 flow [2024-06-21 20:02:14,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:02:14,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:02:14,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 124 transitions. [2024-06-21 20:02:14,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3887147335423197 [2024-06-21 20:02:14,608 INFO L175 Difference]: Start difference. First operand has 126 places, 80 transitions, 806 flow. Second operand 11 states and 124 transitions. [2024-06-21 20:02:14,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 106 transitions, 1204 flow [2024-06-21 20:02:14,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 106 transitions, 1152 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 20:02:14,623 INFO L231 Difference]: Finished difference. Result has 123 places, 78 transitions, 782 flow [2024-06-21 20:02:14,624 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} [2024-06-21 20:02:14,624 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 92 predicate places. [2024-06-21 20:02:14,624 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 78 transitions, 782 flow [2024-06-21 20:02:14,624 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) [2024-06-21 20:02:14,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:14,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:14,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 20:02:14,624 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)] === [2024-06-21 20:02:14,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:14,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1625090799, now seen corresponding path program 4 times [2024-06-21 20:02:14,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:14,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793392884] [2024-06-21 20:02:14,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:14,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:14,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:14,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:14,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:14,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793392884] [2024-06-21 20:02:14,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793392884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:14,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:14,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:02:14,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938106460] [2024-06-21 20:02:14,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:14,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:02:14,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:14,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:02:14,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:02:14,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 20:02:14,876 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) [2024-06-21 20:02:14,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:14,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 20:02:14,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:15,021 INFO L124 PetriNetUnfolderBase]: 346/652 cut-off events. [2024-06-21 20:02:15,021 INFO L125 PetriNetUnfolderBase]: For 14321/14325 co-relation queries the response was YES. [2024-06-21 20:02:15,023 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. [2024-06-21 20:02:15,025 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 59 selfloop transitions, 21 changer transitions 21/104 dead transitions. [2024-06-21 20:02:15,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 104 transitions, 1132 flow [2024-06-21 20:02:15,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:02:15,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:02:15,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-21 20:02:15,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38557993730407525 [2024-06-21 20:02:15,037 INFO L175 Difference]: Start difference. First operand has 123 places, 78 transitions, 782 flow. Second operand 11 states and 123 transitions. [2024-06-21 20:02:15,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 104 transitions, 1132 flow [2024-06-21 20:02:15,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 104 transitions, 1078 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 20:02:15,056 INFO L231 Difference]: Finished difference. Result has 121 places, 73 transitions, 738 flow [2024-06-21 20:02:15,056 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} [2024-06-21 20:02:15,056 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 90 predicate places. [2024-06-21 20:02:15,056 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 73 transitions, 738 flow [2024-06-21 20:02:15,056 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) [2024-06-21 20:02:15,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:15,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:15,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 20:02:15,057 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)] === [2024-06-21 20:02:15,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:15,058 INFO L85 PathProgramCache]: Analyzing trace with hash -782989849, now seen corresponding path program 5 times [2024-06-21 20:02:15,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:15,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925176114] [2024-06-21 20:02:15,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:15,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:15,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:15,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:15,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:15,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925176114] [2024-06-21 20:02:15,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925176114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:15,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:15,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:02:15,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875469346] [2024-06-21 20:02:15,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:15,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:02:15,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:15,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:02:15,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:02:15,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 20:02:15,343 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) [2024-06-21 20:02:15,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:15,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 20:02:15,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:15,472 INFO L124 PetriNetUnfolderBase]: 329/616 cut-off events. [2024-06-21 20:02:15,472 INFO L125 PetriNetUnfolderBase]: For 13009/13013 co-relation queries the response was YES. [2024-06-21 20:02:15,474 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. [2024-06-21 20:02:15,476 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 59 selfloop transitions, 19 changer transitions 18/99 dead transitions. [2024-06-21 20:02:15,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 99 transitions, 1176 flow [2024-06-21 20:02:15,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:02:15,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:02:15,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-21 20:02:15,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38557993730407525 [2024-06-21 20:02:15,477 INFO L175 Difference]: Start difference. First operand has 121 places, 73 transitions, 738 flow. Second operand 11 states and 123 transitions. [2024-06-21 20:02:15,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 99 transitions, 1176 flow [2024-06-21 20:02:15,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 99 transitions, 1089 flow, removed 18 selfloop flow, removed 11 redundant places. [2024-06-21 20:02:15,492 INFO L231 Difference]: Finished difference. Result has 114 places, 70 transitions, 671 flow [2024-06-21 20:02:15,492 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} [2024-06-21 20:02:15,492 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 83 predicate places. [2024-06-21 20:02:15,492 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 70 transitions, 671 flow [2024-06-21 20:02:15,492 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) [2024-06-21 20:02:15,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:15,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:15,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 20:02:15,493 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)] === [2024-06-21 20:02:15,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:15,493 INFO L85 PathProgramCache]: Analyzing trace with hash -781087069, now seen corresponding path program 6 times [2024-06-21 20:02:15,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:15,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22484402] [2024-06-21 20:02:15,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:15,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:15,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:15,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:15,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:15,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22484402] [2024-06-21 20:02:15,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22484402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:15,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:15,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:02:15,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029112063] [2024-06-21 20:02:15,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:15,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:02:15,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:15,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:02:15,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:02:15,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 20:02:15,759 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) [2024-06-21 20:02:15,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:15,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 20:02:15,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:15,881 INFO L124 PetriNetUnfolderBase]: 309/580 cut-off events. [2024-06-21 20:02:15,882 INFO L125 PetriNetUnfolderBase]: For 11019/11019 co-relation queries the response was YES. [2024-06-21 20:02:15,883 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. [2024-06-21 20:02:15,885 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 57 selfloop transitions, 20 changer transitions 13/93 dead transitions. [2024-06-21 20:02:15,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 93 transitions, 1027 flow [2024-06-21 20:02:15,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:02:15,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:02:15,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 120 transitions. [2024-06-21 20:02:15,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3761755485893417 [2024-06-21 20:02:15,886 INFO L175 Difference]: Start difference. First operand has 114 places, 70 transitions, 671 flow. Second operand 11 states and 120 transitions. [2024-06-21 20:02:15,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 93 transitions, 1027 flow [2024-06-21 20:02:15,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 93 transitions, 985 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 20:02:15,900 INFO L231 Difference]: Finished difference. Result has 111 places, 68 transitions, 649 flow [2024-06-21 20:02:15,900 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} [2024-06-21 20:02:15,901 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 80 predicate places. [2024-06-21 20:02:15,901 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 68 transitions, 649 flow [2024-06-21 20:02:15,902 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) [2024-06-21 20:02:15,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:15,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:15,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 20:02:15,902 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)] === [2024-06-21 20:02:15,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:15,902 INFO L85 PathProgramCache]: Analyzing trace with hash -698560175, now seen corresponding path program 7 times [2024-06-21 20:02:15,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:15,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985217097] [2024-06-21 20:02:15,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:15,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:15,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:16,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:16,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:16,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985217097] [2024-06-21 20:02:16,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985217097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:16,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:16,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:02:16,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721538208] [2024-06-21 20:02:16,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:16,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:02:16,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:16,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:02:16,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:02:16,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 20:02:16,187 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) [2024-06-21 20:02:16,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:16,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 20:02:16,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:16,316 INFO L124 PetriNetUnfolderBase]: 298/563 cut-off events. [2024-06-21 20:02:16,316 INFO L125 PetriNetUnfolderBase]: For 10686/10686 co-relation queries the response was YES. [2024-06-21 20:02:16,317 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. [2024-06-21 20:02:16,319 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 54 selfloop transitions, 17 changer transitions 17/91 dead transitions. [2024-06-21 20:02:16,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 91 transitions, 961 flow [2024-06-21 20:02:16,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:02:16,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:02:16,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 119 transitions. [2024-06-21 20:02:16,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3730407523510972 [2024-06-21 20:02:16,319 INFO L175 Difference]: Start difference. First operand has 111 places, 68 transitions, 649 flow. Second operand 11 states and 119 transitions. [2024-06-21 20:02:16,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 91 transitions, 961 flow [2024-06-21 20:02:16,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 91 transitions, 917 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 20:02:16,330 INFO L231 Difference]: Finished difference. Result has 109 places, 64 transitions, 611 flow [2024-06-21 20:02:16,330 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} [2024-06-21 20:02:16,331 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 78 predicate places. [2024-06-21 20:02:16,331 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 64 transitions, 611 flow [2024-06-21 20:02:16,331 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) [2024-06-21 20:02:16,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:16,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:16,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 20:02:16,331 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)] === [2024-06-21 20:02:16,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:16,332 INFO L85 PathProgramCache]: Analyzing trace with hash -492829295, now seen corresponding path program 8 times [2024-06-21 20:02:16,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:16,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803070427] [2024-06-21 20:02:16,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:16,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:16,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:16,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:16,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:16,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803070427] [2024-06-21 20:02:16,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803070427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:16,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:16,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:02:16,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490893030] [2024-06-21 20:02:16,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:16,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:02:16,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:16,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:02:16,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:02:16,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 20:02:16,580 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) [2024-06-21 20:02:16,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:16,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 20:02:16,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:16,704 INFO L124 PetriNetUnfolderBase]: 285/538 cut-off events. [2024-06-21 20:02:16,704 INFO L125 PetriNetUnfolderBase]: For 9720/9724 co-relation queries the response was YES. [2024-06-21 20:02:16,705 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. [2024-06-21 20:02:16,706 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 53 selfloop transitions, 16 changer transitions 18/90 dead transitions. [2024-06-21 20:02:16,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 90 transitions, 939 flow [2024-06-21 20:02:16,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:02:16,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:02:16,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 122 transitions. [2024-06-21 20:02:16,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3824451410658307 [2024-06-21 20:02:16,707 INFO L175 Difference]: Start difference. First operand has 109 places, 64 transitions, 611 flow. Second operand 11 states and 122 transitions. [2024-06-21 20:02:16,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 90 transitions, 939 flow [2024-06-21 20:02:16,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 90 transitions, 881 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-21 20:02:16,722 INFO L231 Difference]: Finished difference. Result has 104 places, 61 transitions, 561 flow [2024-06-21 20:02:16,722 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} [2024-06-21 20:02:16,723 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 73 predicate places. [2024-06-21 20:02:16,723 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 61 transitions, 561 flow [2024-06-21 20:02:16,723 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) [2024-06-21 20:02:16,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:16,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:16,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 20:02:16,724 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)] === [2024-06-21 20:02:16,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:16,724 INFO L85 PathProgramCache]: Analyzing trace with hash -500156765, now seen corresponding path program 9 times [2024-06-21 20:02:16,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:16,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659749064] [2024-06-21 20:02:16,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:16,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:16,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:16,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:16,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:16,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659749064] [2024-06-21 20:02:16,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659749064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:16,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:16,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:02:16,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051495423] [2024-06-21 20:02:16,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:16,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:02:16,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:16,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:02:16,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:02:17,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 20:02:17,028 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) [2024-06-21 20:02:17,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:17,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 20:02:17,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:17,153 INFO L124 PetriNetUnfolderBase]: 265/502 cut-off events. [2024-06-21 20:02:17,153 INFO L125 PetriNetUnfolderBase]: For 8119/8119 co-relation queries the response was YES. [2024-06-21 20:02:17,154 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. [2024-06-21 20:02:17,156 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 51 selfloop transitions, 17 changer transitions 13/84 dead transitions. [2024-06-21 20:02:17,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 84 transitions, 891 flow [2024-06-21 20:02:17,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:02:17,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:02:17,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 119 transitions. [2024-06-21 20:02:17,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3730407523510972 [2024-06-21 20:02:17,157 INFO L175 Difference]: Start difference. First operand has 104 places, 61 transitions, 561 flow. Second operand 11 states and 119 transitions. [2024-06-21 20:02:17,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 84 transitions, 891 flow [2024-06-21 20:02:17,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 84 transitions, 843 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-21 20:02:17,166 INFO L231 Difference]: Finished difference. Result has 100 places, 59 transitions, 537 flow [2024-06-21 20:02:17,166 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} [2024-06-21 20:02:17,166 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 69 predicate places. [2024-06-21 20:02:17,166 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 59 transitions, 537 flow [2024-06-21 20:02:17,166 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) [2024-06-21 20:02:17,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:17,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:17,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 20:02:17,167 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)] === [2024-06-21 20:02:17,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:17,167 INFO L85 PathProgramCache]: Analyzing trace with hash -500152115, now seen corresponding path program 10 times [2024-06-21 20:02:17,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:17,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213145740] [2024-06-21 20:02:17,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:17,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:17,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:17,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:17,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:17,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213145740] [2024-06-21 20:02:17,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213145740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:17,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:17,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:02:17,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948807842] [2024-06-21 20:02:17,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:17,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:02:17,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:17,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:02:17,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:02:17,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 20:02:17,415 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) [2024-06-21 20:02:17,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:17,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 20:02:17,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:17,523 INFO L124 PetriNetUnfolderBase]: 254/485 cut-off events. [2024-06-21 20:02:17,523 INFO L125 PetriNetUnfolderBase]: For 7368/7372 co-relation queries the response was YES. [2024-06-21 20:02:17,524 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. [2024-06-21 20:02:17,525 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 44 selfloop transitions, 12 changer transitions 23/82 dead transitions. [2024-06-21 20:02:17,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 82 transitions, 823 flow [2024-06-21 20:02:17,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:02:17,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:02:17,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 118 transitions. [2024-06-21 20:02:17,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36990595611285265 [2024-06-21 20:02:17,526 INFO L175 Difference]: Start difference. First operand has 100 places, 59 transitions, 537 flow. Second operand 11 states and 118 transitions. [2024-06-21 20:02:17,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 82 transitions, 823 flow [2024-06-21 20:02:17,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 82 transitions, 785 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 20:02:17,533 INFO L231 Difference]: Finished difference. Result has 98 places, 53 transitions, 474 flow [2024-06-21 20:02:17,533 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} [2024-06-21 20:02:17,533 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 67 predicate places. [2024-06-21 20:02:17,534 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 53 transitions, 474 flow [2024-06-21 20:02:17,534 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) [2024-06-21 20:02:17,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:17,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:17,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 20:02:17,534 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)] === [2024-06-21 20:02:17,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:17,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1064284101, now seen corresponding path program 11 times [2024-06-21 20:02:17,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:17,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070561440] [2024-06-21 20:02:17,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:17,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:17,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:17,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:17,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:17,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070561440] [2024-06-21 20:02:17,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070561440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:17,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:17,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:02:17,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516717076] [2024-06-21 20:02:17,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:17,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:02:17,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:17,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:02:17,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:02:17,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 20:02:17,812 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) [2024-06-21 20:02:17,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:17,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 20:02:17,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:17,927 INFO L124 PetriNetUnfolderBase]: 236/441 cut-off events. [2024-06-21 20:02:17,927 INFO L125 PetriNetUnfolderBase]: For 6492/6496 co-relation queries the response was YES. [2024-06-21 20:02:17,928 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. [2024-06-21 20:02:17,929 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 43 selfloop transitions, 12 changer transitions 18/76 dead transitions. [2024-06-21 20:02:17,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 76 transitions, 758 flow [2024-06-21 20:02:17,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:02:17,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:02:17,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 117 transitions. [2024-06-21 20:02:17,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3667711598746082 [2024-06-21 20:02:17,933 INFO L175 Difference]: Start difference. First operand has 98 places, 53 transitions, 474 flow. Second operand 11 states and 117 transitions. [2024-06-21 20:02:17,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 76 transitions, 758 flow [2024-06-21 20:02:17,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 76 transitions, 692 flow, removed 15 selfloop flow, removed 13 redundant places. [2024-06-21 20:02:17,939 INFO L231 Difference]: Finished difference. Result has 87 places, 50 transitions, 410 flow [2024-06-21 20:02:17,939 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} [2024-06-21 20:02:17,941 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 56 predicate places. [2024-06-21 20:02:17,941 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 50 transitions, 410 flow [2024-06-21 20:02:17,941 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) [2024-06-21 20:02:17,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:17,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:17,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 20:02:17,947 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)] === [2024-06-21 20:02:17,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:17,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1071611571, now seen corresponding path program 12 times [2024-06-21 20:02:17,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:17,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104050264] [2024-06-21 20:02:17,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:17,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:17,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:18,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:18,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:18,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104050264] [2024-06-21 20:02:18,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104050264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:18,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:18,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:02:18,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076882524] [2024-06-21 20:02:18,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:18,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:02:18,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:18,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:02:18,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:02:18,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 20:02:18,229 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) [2024-06-21 20:02:18,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:18,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 20:02:18,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:18,343 INFO L124 PetriNetUnfolderBase]: 216/407 cut-off events. [2024-06-21 20:02:18,343 INFO L125 PetriNetUnfolderBase]: For 5037/5041 co-relation queries the response was YES. [2024-06-21 20:02:18,344 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. [2024-06-21 20:02:18,345 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 41 selfloop transitions, 13 changer transitions 13/70 dead transitions. [2024-06-21 20:02:18,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 70 transitions, 684 flow [2024-06-21 20:02:18,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:02:18,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:02:18,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 114 transitions. [2024-06-21 20:02:18,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3573667711598746 [2024-06-21 20:02:18,346 INFO L175 Difference]: Start difference. First operand has 87 places, 50 transitions, 410 flow. Second operand 11 states and 114 transitions. [2024-06-21 20:02:18,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 70 transitions, 684 flow [2024-06-21 20:02:18,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 70 transitions, 644 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-21 20:02:18,351 INFO L231 Difference]: Finished difference. Result has 83 places, 48 transitions, 388 flow [2024-06-21 20:02:18,351 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} [2024-06-21 20:02:18,351 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 52 predicate places. [2024-06-21 20:02:18,351 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 48 transitions, 388 flow [2024-06-21 20:02:18,351 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) [2024-06-21 20:02:18,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:18,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:18,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 20:02:18,352 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)] === [2024-06-21 20:02:18,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:18,352 INFO L85 PathProgramCache]: Analyzing trace with hash -234734293, now seen corresponding path program 13 times [2024-06-21 20:02:18,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:18,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470674153] [2024-06-21 20:02:18,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:18,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:18,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:18,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:18,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:18,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470674153] [2024-06-21 20:02:18,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470674153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:18,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:18,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:02:18,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360014357] [2024-06-21 20:02:18,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:18,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:02:18,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:18,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:02:18,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:02:18,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 20:02:18,620 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) [2024-06-21 20:02:18,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:18,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 20:02:18,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:18,743 INFO L124 PetriNetUnfolderBase]: 205/388 cut-off events. [2024-06-21 20:02:18,743 INFO L125 PetriNetUnfolderBase]: For 4228/4228 co-relation queries the response was YES. [2024-06-21 20:02:18,744 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. [2024-06-21 20:02:18,745 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 38 selfloop transitions, 10 changer transitions 17/68 dead transitions. [2024-06-21 20:02:18,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 68 transitions, 628 flow [2024-06-21 20:02:18,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:02:18,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:02:18,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 113 transitions. [2024-06-21 20:02:18,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3542319749216301 [2024-06-21 20:02:18,745 INFO L175 Difference]: Start difference. First operand has 83 places, 48 transitions, 388 flow. Second operand 11 states and 113 transitions. [2024-06-21 20:02:18,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 68 transitions, 628 flow [2024-06-21 20:02:18,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 68 transitions, 598 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 20:02:18,750 INFO L231 Difference]: Finished difference. Result has 81 places, 44 transitions, 346 flow [2024-06-21 20:02:18,750 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} [2024-06-21 20:02:18,750 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 50 predicate places. [2024-06-21 20:02:18,751 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 44 transitions, 346 flow [2024-06-21 20:02:18,751 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) [2024-06-21 20:02:18,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:18,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:18,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 20:02:18,751 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)] === [2024-06-21 20:02:18,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:18,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1354444655, now seen corresponding path program 14 times [2024-06-21 20:02:18,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:18,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417949367] [2024-06-21 20:02:18,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:18,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:18,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:18,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:18,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:18,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417949367] [2024-06-21 20:02:18,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417949367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:18,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:18,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:02:18,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505622721] [2024-06-21 20:02:18,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:18,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:02:18,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:18,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:02:18,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:02:19,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 20:02:19,050 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) [2024-06-21 20:02:19,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:19,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 20:02:19,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:19,154 INFO L124 PetriNetUnfolderBase]: 192/361 cut-off events. [2024-06-21 20:02:19,154 INFO L125 PetriNetUnfolderBase]: For 3766/3768 co-relation queries the response was YES. [2024-06-21 20:02:19,155 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. [2024-06-21 20:02:19,155 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 35 selfloop transitions, 11 changer transitions 18/67 dead transitions. [2024-06-21 20:02:19,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 67 transitions, 646 flow [2024-06-21 20:02:19,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:02:19,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:02:19,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 116 transitions. [2024-06-21 20:02:19,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-21 20:02:19,156 INFO L175 Difference]: Start difference. First operand has 81 places, 44 transitions, 346 flow. Second operand 11 states and 116 transitions. [2024-06-21 20:02:19,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 67 transitions, 646 flow [2024-06-21 20:02:19,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 67 transitions, 588 flow, removed 19 selfloop flow, removed 10 redundant places. [2024-06-21 20:02:19,160 INFO L231 Difference]: Finished difference. Result has 75 places, 41 transitions, 304 flow [2024-06-21 20:02:19,161 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} [2024-06-21 20:02:19,161 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 44 predicate places. [2024-06-21 20:02:19,161 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 41 transitions, 304 flow [2024-06-21 20:02:19,161 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) [2024-06-21 20:02:19,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:19,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:19,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 20:02:19,162 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)] === [2024-06-21 20:02:19,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:19,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1352541875, now seen corresponding path program 15 times [2024-06-21 20:02:19,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:19,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380299352] [2024-06-21 20:02:19,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:19,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:19,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:19,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:19,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:19,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380299352] [2024-06-21 20:02:19,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380299352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:19,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:19,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:02:19,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367742606] [2024-06-21 20:02:19,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:19,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:02:19,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:19,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:02:19,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:02:19,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 20:02:19,455 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) [2024-06-21 20:02:19,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:19,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 20:02:19,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:19,558 INFO L124 PetriNetUnfolderBase]: 172/329 cut-off events. [2024-06-21 20:02:19,558 INFO L125 PetriNetUnfolderBase]: For 2766/2768 co-relation queries the response was YES. [2024-06-21 20:02:19,559 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. [2024-06-21 20:02:19,560 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 33 selfloop transitions, 12 changer transitions 13/61 dead transitions. [2024-06-21 20:02:19,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 61 transitions, 540 flow [2024-06-21 20:02:19,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:02:19,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:02:19,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 113 transitions. [2024-06-21 20:02:19,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3542319749216301 [2024-06-21 20:02:19,562 INFO L175 Difference]: Start difference. First operand has 75 places, 41 transitions, 304 flow. Second operand 11 states and 113 transitions. [2024-06-21 20:02:19,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 61 transitions, 540 flow [2024-06-21 20:02:19,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 61 transitions, 506 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-21 20:02:19,566 INFO L231 Difference]: Finished difference. Result has 71 places, 39 transitions, 284 flow [2024-06-21 20:02:19,566 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} [2024-06-21 20:02:19,566 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 40 predicate places. [2024-06-21 20:02:19,566 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 39 transitions, 284 flow [2024-06-21 20:02:19,566 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) [2024-06-21 20:02:19,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:19,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:19,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 20:02:19,567 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)] === [2024-06-21 20:02:19,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:19,567 INFO L85 PathProgramCache]: Analyzing trace with hash -433142353, now seen corresponding path program 16 times [2024-06-21 20:02:19,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:19,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353632604] [2024-06-21 20:02:19,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:19,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:19,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:19,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:19,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:19,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353632604] [2024-06-21 20:02:19,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353632604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:19,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:19,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:02:19,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353618563] [2024-06-21 20:02:19,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:19,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:02:19,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:19,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:02:19,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:02:19,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 20:02:19,833 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) [2024-06-21 20:02:19,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:19,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 20:02:19,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:19,918 INFO L124 PetriNetUnfolderBase]: 161/310 cut-off events. [2024-06-21 20:02:19,918 INFO L125 PetriNetUnfolderBase]: For 2279/2279 co-relation queries the response was YES. [2024-06-21 20:02:19,919 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. [2024-06-21 20:02:19,920 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 29 selfloop transitions, 8 changer transitions 19/59 dead transitions. [2024-06-21 20:02:19,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 59 transitions, 494 flow [2024-06-21 20:02:19,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:02:19,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:02:19,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 112 transitions. [2024-06-21 20:02:19,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3510971786833856 [2024-06-21 20:02:19,921 INFO L175 Difference]: Start difference. First operand has 71 places, 39 transitions, 284 flow. Second operand 11 states and 112 transitions. [2024-06-21 20:02:19,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 59 transitions, 494 flow [2024-06-21 20:02:19,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 59 transitions, 466 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 20:02:19,924 INFO L231 Difference]: Finished difference. Result has 69 places, 34 transitions, 241 flow [2024-06-21 20:02:19,924 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} [2024-06-21 20:02:19,924 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 38 predicate places. [2024-06-21 20:02:19,924 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 34 transitions, 241 flow [2024-06-21 20:02:19,924 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) [2024-06-21 20:02:19,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:19,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:19,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 20:02:19,925 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)] === [2024-06-21 20:02:19,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:19,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1696999155, now seen corresponding path program 17 times [2024-06-21 20:02:19,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:19,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554513235] [2024-06-21 20:02:19,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:19,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:19,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:20,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:20,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:20,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554513235] [2024-06-21 20:02:20,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554513235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:20,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:20,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:02:20,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438632599] [2024-06-21 20:02:20,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:20,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:02:20,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:20,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:02:20,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:02:20,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 20:02:20,177 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) [2024-06-21 20:02:20,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:20,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 20:02:20,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:20,267 INFO L124 PetriNetUnfolderBase]: 147/282 cut-off events. [2024-06-21 20:02:20,267 INFO L125 PetriNetUnfolderBase]: For 2031/2031 co-relation queries the response was YES. [2024-06-21 20:02:20,267 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. [2024-06-21 20:02:20,268 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 26 selfloop transitions, 8 changer transitions 19/56 dead transitions. [2024-06-21 20:02:20,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 56 transitions, 459 flow [2024-06-21 20:02:20,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:02:20,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:02:20,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 114 transitions. [2024-06-21 20:02:20,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3573667711598746 [2024-06-21 20:02:20,269 INFO L175 Difference]: Start difference. First operand has 69 places, 34 transitions, 241 flow. Second operand 11 states and 114 transitions. [2024-06-21 20:02:20,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 56 transitions, 459 flow [2024-06-21 20:02:20,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 56 transitions, 408 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-21 20:02:20,271 INFO L231 Difference]: Finished difference. Result has 61 places, 30 transitions, 192 flow [2024-06-21 20:02:20,271 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} [2024-06-21 20:02:20,272 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 30 predicate places. [2024-06-21 20:02:20,272 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 30 transitions, 192 flow [2024-06-21 20:02:20,272 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) [2024-06-21 20:02:20,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:20,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:20,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 20:02:20,272 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)] === [2024-06-21 20:02:20,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:20,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1946349825, now seen corresponding path program 18 times [2024-06-21 20:02:20,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:20,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968888409] [2024-06-21 20:02:20,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:20,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:20,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:20,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:20,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:20,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968888409] [2024-06-21 20:02:20,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968888409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:20,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:20,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:02:20,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903023915] [2024-06-21 20:02:20,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:20,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:02:20,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:20,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:02:20,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:02:20,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 20:02:20,530 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) [2024-06-21 20:02:20,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:20,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 20:02:20,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:20,633 INFO L124 PetriNetUnfolderBase]: 118/225 cut-off events. [2024-06-21 20:02:20,634 INFO L125 PetriNetUnfolderBase]: For 1345/1353 co-relation queries the response was YES. [2024-06-21 20:02:20,634 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. [2024-06-21 20:02:20,634 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 21 selfloop transitions, 7 changer transitions 18/49 dead transitions. [2024-06-21 20:02:20,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 49 transitions, 368 flow [2024-06-21 20:02:20,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:02:20,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:02:20,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 109 transitions. [2024-06-21 20:02:20,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34169278996865204 [2024-06-21 20:02:20,635 INFO L175 Difference]: Start difference. First operand has 61 places, 30 transitions, 192 flow. Second operand 11 states and 109 transitions. [2024-06-21 20:02:20,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 49 transitions, 368 flow [2024-06-21 20:02:20,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 49 transitions, 336 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-21 20:02:20,637 INFO L231 Difference]: Finished difference. Result has 55 places, 27 transitions, 153 flow [2024-06-21 20:02:20,637 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} [2024-06-21 20:02:20,637 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 24 predicate places. [2024-06-21 20:02:20,637 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 27 transitions, 153 flow [2024-06-21 20:02:20,637 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) [2024-06-21 20:02:20,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:20,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:20,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 20:02:20,638 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)] === [2024-06-21 20:02:20,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:20,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1953672645, now seen corresponding path program 19 times [2024-06-21 20:02:20,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:20,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606050266] [2024-06-21 20:02:20,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:20,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:20,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:20,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:20,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:20,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606050266] [2024-06-21 20:02:20,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606050266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:20,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:20,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:02:20,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374560553] [2024-06-21 20:02:20,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:20,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:02:20,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:20,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:02:20,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:02:20,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 20:02:20,898 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) [2024-06-21 20:02:20,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:20,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 20:02:20,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:20,982 INFO L124 PetriNetUnfolderBase]: 98/191 cut-off events. [2024-06-21 20:02:20,982 INFO L125 PetriNetUnfolderBase]: For 954/954 co-relation queries the response was YES. [2024-06-21 20:02:20,982 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. [2024-06-21 20:02:20,983 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 19 selfloop transitions, 8 changer transitions 13/43 dead transitions. [2024-06-21 20:02:20,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 43 transitions, 299 flow [2024-06-21 20:02:20,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:02:20,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:02:20,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 106 transitions. [2024-06-21 20:02:20,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3322884012539185 [2024-06-21 20:02:20,983 INFO L175 Difference]: Start difference. First operand has 55 places, 27 transitions, 153 flow. Second operand 11 states and 106 transitions. [2024-06-21 20:02:20,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 43 transitions, 299 flow [2024-06-21 20:02:20,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 43 transitions, 265 flow, removed 9 selfloop flow, removed 12 redundant places. [2024-06-21 20:02:20,985 INFO L231 Difference]: Finished difference. Result has 49 places, 25 transitions, 130 flow [2024-06-21 20:02:20,985 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} [2024-06-21 20:02:20,985 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 18 predicate places. [2024-06-21 20:02:20,985 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 25 transitions, 130 flow [2024-06-21 20:02:20,985 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) [2024-06-21 20:02:20,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:02:20,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:02:20,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 20:02:20,986 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)] === [2024-06-21 20:02:20,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:02:20,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1953677295, now seen corresponding path program 20 times [2024-06-21 20:02:20,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:02:20,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023871630] [2024-06-21 20:02:20,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:02:20,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:02:20,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:02:21,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:02:21,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:02:21,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023871630] [2024-06-21 20:02:21,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023871630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:02:21,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:02:21,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:02:21,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727249161] [2024-06-21 20:02:21,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:02:21,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:02:21,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:02:21,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:02:21,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:02:21,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 20:02:21,232 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) [2024-06-21 20:02:21,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:02:21,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 20:02:21,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:02:21,290 INFO L124 PetriNetUnfolderBase]: 42/96 cut-off events. [2024-06-21 20:02:21,290 INFO L125 PetriNetUnfolderBase]: For 268/268 co-relation queries the response was YES. [2024-06-21 20:02:21,290 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. [2024-06-21 20:02:21,290 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 0 selfloop transitions, 0 changer transitions 33/33 dead transitions. [2024-06-21 20:02:21,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 33 transitions, 204 flow [2024-06-21 20:02:21,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:02:21,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:02:21,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 97 transitions. [2024-06-21 20:02:21,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30407523510971785 [2024-06-21 20:02:21,291 INFO L175 Difference]: Start difference. First operand has 49 places, 25 transitions, 130 flow. Second operand 11 states and 97 transitions. [2024-06-21 20:02:21,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 33 transitions, 204 flow [2024-06-21 20:02:21,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 33 transitions, 180 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-21 20:02:21,292 INFO L231 Difference]: Finished difference. Result has 44 places, 0 transitions, 0 flow [2024-06-21 20:02:21,292 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} [2024-06-21 20:02:21,292 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 13 predicate places. [2024-06-21 20:02:21,292 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 0 transitions, 0 flow [2024-06-21 20:02:21,292 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) [2024-06-21 20:02:21,295 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-21 20:02:21,295 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-21 20:02:21,296 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-21 20:02:21,296 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-21 20:02:21,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 20:02:21,296 INFO L445 BasicCegarLoop]: Path program histogram: [20, 10, 10, 6, 1, 1, 1, 1, 1] [2024-06-21 20:02:21,299 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-21 20:02:21,299 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-21 20:02:21,302 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-21 20:02:21,303 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-21 20:02:21,303 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.06 08:02:21 BasicIcfg [2024-06-21 20:02:21,304 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-21 20:02:21,304 INFO L158 Benchmark]: Toolchain (without parser) took 21578.42ms. Allocated memory was 121.6MB in the beginning and 377.5MB in the end (delta: 255.9MB). Free memory was 80.4MB in the beginning and 154.1MB in the end (delta: -73.6MB). Peak memory consumption was 183.2MB. Max. memory is 16.1GB. [2024-06-21 20:02:21,304 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 121.6MB. Free memory is still 96.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 20:02:21,304 INFO L158 Benchmark]: Witness Parser took 0.16ms. Allocated memory is still 121.6MB. Free memory is still 84.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 20:02:21,305 INFO L158 Benchmark]: CACSL2BoogieTranslator took 466.01ms. Allocated memory is still 121.6MB. Free memory was 80.2MB in the beginning and 54.2MB in the end (delta: 26.0MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-06-21 20:02:21,305 INFO L158 Benchmark]: Boogie Procedure Inliner took 73.42ms. Allocated memory is still 121.6MB. Free memory was 54.2MB in the beginning and 90.6MB in the end (delta: -36.4MB). Peak memory consumption was 7.7MB. Max. memory is 16.1GB. [2024-06-21 20:02:21,305 INFO L158 Benchmark]: Boogie Preprocessor took 26.77ms. Allocated memory is still 121.6MB. Free memory was 93.7MB in the beginning and 91.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-21 20:02:21,305 INFO L158 Benchmark]: RCFGBuilder took 424.49ms. Allocated memory is still 121.6MB. Free memory was 91.6MB in the beginning and 65.8MB in the end (delta: 25.8MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-06-21 20:02:21,306 INFO L158 Benchmark]: TraceAbstraction took 20566.44ms. Allocated memory was 121.6MB in the beginning and 377.5MB in the end (delta: 255.9MB). Free memory was 65.1MB in the beginning and 154.1MB in the end (delta: -88.9MB). Peak memory consumption was 166.8MB. Max. memory is 16.1GB. [2024-06-21 20:02:21,306 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 121.6MB. Free memory is still 96.5MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.16ms. Allocated memory is still 121.6MB. Free memory is still 84.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 466.01ms. Allocated memory is still 121.6MB. Free memory was 80.2MB in the beginning and 54.2MB in the end (delta: 26.0MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 73.42ms. Allocated memory is still 121.6MB. Free memory was 54.2MB in the beginning and 90.6MB in the end (delta: -36.4MB). Peak memory consumption was 7.7MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.77ms. Allocated memory is still 121.6MB. Free memory was 93.7MB in the beginning and 91.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 424.49ms. Allocated memory is still 121.6MB. Free memory was 91.6MB in the beginning and 65.8MB in the end (delta: 25.8MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 20566.44ms. Allocated memory was 121.6MB in the beginning and 377.5MB in the end (delta: 255.9MB). Free memory was 65.1MB in the beginning and 154.1MB in the end (delta: -88.9MB). Peak memory consumption was 166.8MB. 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: 20.5s, OverallIterations: 51, TraceHistogramMax: 1, PathProgramHistogramMax: 20, EmptinessCheckTime: 0.0s, AutomataDifference: 9.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3383 SdHoareTripleChecker+Valid, 6.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2951 mSDsluCounter, 570 SdHoareTripleChecker+Invalid, 5.2s 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, 4.2s 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: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 10.5s 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! [2024-06-21 20:02:21,330 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE