./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix004.oepc.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a340643f 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/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix004.oepc.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 81dfcecae183e47a2274a923e55daf761c46d6146ab2c58970ae115599afe231 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 16:09:19,167 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 16:09:19,226 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 16:09:19,230 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 16:09:19,230 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 16:09:19,257 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 16:09:19,257 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 16:09:19,257 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 16:09:19,258 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 16:09:19,261 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 16:09:19,261 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 16:09:19,262 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 16:09:19,262 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 16:09:19,263 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 16:09:19,264 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 16:09:19,264 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 16:09:19,264 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 16:09:19,264 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 16:09:19,265 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 16:09:19,265 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 16:09:19,265 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 16:09:19,265 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 16:09:19,266 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 16:09:19,266 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 16:09:19,266 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 16:09:19,266 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 16:09:19,267 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 16:09:19,267 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 16:09:19,267 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 16:09:19,268 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 16:09:19,269 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 16:09:19,269 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 16:09:19,270 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 16:09:19,270 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 16:09:19,270 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 16:09:19,270 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 16:09:19,270 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 16:09:19,271 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 16:09:19,271 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 16:09:19,271 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 16:09:19,271 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 16:09:19,272 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 16:09:19,272 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 16:09:19,272 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81dfcecae183e47a2274a923e55daf761c46d6146ab2c58970ae115599afe231 [2024-01-27 16:09:19,476 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 16:09:19,497 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 16:09:19,498 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 16:09:19,499 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 16:09:19,500 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 16:09:19,500 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix004.oepc.i [2024-01-27 16:09:20,557 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 16:09:20,795 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 16:09:20,796 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix004.oepc.i [2024-01-27 16:09:20,810 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78e5e9fec/ab6aa821f07141b2bdd94aef8748476f/FLAG6a6b7620b [2024-01-27 16:09:20,820 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78e5e9fec/ab6aa821f07141b2bdd94aef8748476f [2024-01-27 16:09:20,821 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 16:09:20,822 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 16:09:20,823 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 16:09:20,823 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 16:09:20,834 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 16:09:20,835 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 04:09:20" (1/1) ... [2024-01-27 16:09:20,835 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5310c955 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:09:20, skipping insertion in model container [2024-01-27 16:09:20,836 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 04:09:20" (1/1) ... [2024-01-27 16:09:20,876 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 16:09:21,083 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix004.oepc.i[945,958] [2024-01-27 16:09:21,277 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 16:09:21,290 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 16:09:21,301 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix004.oepc.i[945,958] [2024-01-27 16:09:21,347 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 16:09:21,390 INFO L206 MainTranslator]: Completed translation [2024-01-27 16:09:21,390 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:09:21 WrapperNode [2024-01-27 16:09:21,390 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 16:09:21,392 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 16:09:21,392 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 16:09:21,392 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 16:09:21,397 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:09:21" (1/1) ... [2024-01-27 16:09:21,425 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:09:21" (1/1) ... [2024-01-27 16:09:21,456 INFO L138 Inliner]: procedures = 177, calls = 71, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 146 [2024-01-27 16:09:21,459 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 16:09:21,460 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 16:09:21,460 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 16:09:21,460 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 16:09:21,468 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:09:21" (1/1) ... [2024-01-27 16:09:21,468 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:09:21" (1/1) ... [2024-01-27 16:09:21,480 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:09:21" (1/1) ... [2024-01-27 16:09:21,504 INFO L175 MemorySlicer]: Split 6 memory accesses to 5 slices as follows [2, 1, 1, 1, 1]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2024-01-27 16:09:21,506 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:09:21" (1/1) ... [2024-01-27 16:09:21,507 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:09:21" (1/1) ... [2024-01-27 16:09:21,512 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:09:21" (1/1) ... [2024-01-27 16:09:21,513 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:09:21" (1/1) ... [2024-01-27 16:09:21,514 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:09:21" (1/1) ... [2024-01-27 16:09:21,515 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:09:21" (1/1) ... [2024-01-27 16:09:21,517 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 16:09:21,518 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 16:09:21,518 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 16:09:21,518 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 16:09:21,519 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:09:21" (1/1) ... [2024-01-27 16:09:21,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 16:09:21,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:09:21,558 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) [2024-01-27 16:09:21,575 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 [2024-01-27 16:09:21,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 16:09:21,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 16:09:21,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 16:09:21,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 16:09:21,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-27 16:09:21,618 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-27 16:09:21,620 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 16:09:21,620 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 16:09:21,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 16:09:21,620 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-01-27 16:09:21,620 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-01-27 16:09:21,620 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-01-27 16:09:21,620 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-01-27 16:09:21,621 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-01-27 16:09:21,621 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-01-27 16:09:21,621 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-01-27 16:09:21,621 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-01-27 16:09:21,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 16:09:21,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 16:09:21,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 16:09:21,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 16:09:21,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-27 16:09:21,622 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-27 16:09:21,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 16:09:21,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 16:09:21,623 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-27 16:09:21,806 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 16:09:21,808 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 16:09:22,109 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 16:09:22,110 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 16:09:22,295 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 16:09:22,296 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-01-27 16:09:22,296 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 04:09:22 BoogieIcfgContainer [2024-01-27 16:09:22,296 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 16:09:22,298 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 16:09:22,298 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 16:09:22,300 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 16:09:22,301 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 04:09:20" (1/3) ... [2024-01-27 16:09:22,301 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f289330 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 04:09:22, skipping insertion in model container [2024-01-27 16:09:22,302 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:09:21" (2/3) ... [2024-01-27 16:09:22,303 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f289330 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 04:09:22, skipping insertion in model container [2024-01-27 16:09:22,303 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 04:09:22" (3/3) ... [2024-01-27 16:09:22,304 INFO L112 eAbstractionObserver]: Analyzing ICFG mix004.oepc.i [2024-01-27 16:09:22,310 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 16:09:22,317 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 16:09:22,317 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-01-27 16:09:22,317 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 16:09:22,360 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-27 16:09:22,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 50 transitions, 116 flow [2024-01-27 16:09:22,418 INFO L124 PetriNetUnfolderBase]: 1/46 cut-off events. [2024-01-27 16:09:22,418 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 16:09:22,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59 conditions, 46 events. 1/46 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 97 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2024-01-27 16:09:22,424 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 50 transitions, 116 flow [2024-01-27 16:09:22,429 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 46 transitions, 104 flow [2024-01-27 16:09:22,439 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 16:09:22,445 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=true, 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;@62cd644e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 16:09:22,445 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-01-27 16:09:22,452 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 16:09:22,452 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-01-27 16:09:22,452 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 16:09:22,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:09:22,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-01-27 16:09:22,454 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P0Err0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-01-27 16:09:22,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:09:22,458 INFO L85 PathProgramCache]: Analyzing trace with hash 12487414, now seen corresponding path program 1 times [2024-01-27 16:09:22,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:09:22,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631986978] [2024-01-27 16:09:22,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:09:22,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:09:22,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:09:22,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:09:22,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:09:22,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631986978] [2024-01-27 16:09:22,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631986978] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 16:09:22,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 16:09:22,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-01-27 16:09:22,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143733395] [2024-01-27 16:09:22,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 16:09:22,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 16:09:22,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:09:22,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 16:09:22,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 16:09:22,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 50 [2024-01-27 16:09:22,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 46 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:09:22,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:09:22,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 50 [2024-01-27 16:09:22,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:09:23,604 INFO L124 PetriNetUnfolderBase]: 2495/3960 cut-off events. [2024-01-27 16:09:23,605 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2024-01-27 16:09:23,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7536 conditions, 3960 events. 2495/3960 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 24929 event pairs, 1647 based on Foata normal form. 135/4028 useless extension candidates. Maximal degree in co-relation 7524. Up to 2779 conditions per place. [2024-01-27 16:09:23,630 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 37 selfloop transitions, 2 changer transitions 2/62 dead transitions. [2024-01-27 16:09:23,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 62 transitions, 227 flow [2024-01-27 16:09:23,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 16:09:23,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 16:09:23,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 119 transitions. [2024-01-27 16:09:23,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7933333333333333 [2024-01-27 16:09:23,642 INFO L175 Difference]: Start difference. First operand has 58 places, 46 transitions, 104 flow. Second operand 3 states and 119 transitions. [2024-01-27 16:09:23,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 62 transitions, 227 flow [2024-01-27 16:09:23,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 62 transitions, 220 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-27 16:09:23,651 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 98 flow [2024-01-27 16:09:23,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2024-01-27 16:09:23,657 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -3 predicate places. [2024-01-27 16:09:23,657 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 98 flow [2024-01-27 16:09:23,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:09:23,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:09:23,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:09:23,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 16:09:23,658 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-01-27 16:09:23,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:09:23,659 INFO L85 PathProgramCache]: Analyzing trace with hash -2030534737, now seen corresponding path program 1 times [2024-01-27 16:09:23,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:09:23,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234438451] [2024-01-27 16:09:23,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:09:23,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:09:23,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:09:23,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:09:23,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:09:23,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234438451] [2024-01-27 16:09:23,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234438451] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 16:09:23,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 16:09:23,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 16:09:23,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445419966] [2024-01-27 16:09:23,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 16:09:23,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 16:09:23,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:09:23,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 16:09:23,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-01-27 16:09:23,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-01-27 16:09:23,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 43 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:09:23,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:09:23,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-01-27 16:09:23,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:09:25,994 INFO L124 PetriNetUnfolderBase]: 16836/23949 cut-off events. [2024-01-27 16:09:25,995 INFO L125 PetriNetUnfolderBase]: For 1146/1146 co-relation queries the response was YES. [2024-01-27 16:09:26,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47930 conditions, 23949 events. 16836/23949 cut-off events. For 1146/1146 co-relation queries the response was YES. Maximal size of possible extension queue 1157. Compared 159425 event pairs, 8508 based on Foata normal form. 0/23415 useless extension candidates. Maximal degree in co-relation 47920. Up to 14758 conditions per place. [2024-01-27 16:09:26,082 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 38 selfloop transitions, 5 changer transitions 61/117 dead transitions. [2024-01-27 16:09:26,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 117 transitions, 472 flow [2024-01-27 16:09:26,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-27 16:09:26,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-27 16:09:26,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 242 transitions. [2024-01-27 16:09:26,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.605 [2024-01-27 16:09:26,085 INFO L175 Difference]: Start difference. First operand has 55 places, 43 transitions, 98 flow. Second operand 8 states and 242 transitions. [2024-01-27 16:09:26,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 117 transitions, 472 flow [2024-01-27 16:09:26,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 117 transitions, 456 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 16:09:26,087 INFO L231 Difference]: Finished difference. Result has 64 places, 46 transitions, 149 flow [2024-01-27 16:09:26,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=149, PETRI_PLACES=64, PETRI_TRANSITIONS=46} [2024-01-27 16:09:26,088 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 6 predicate places. [2024-01-27 16:09:26,088 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 46 transitions, 149 flow [2024-01-27 16:09:26,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:09:26,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:09:26,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:09:26,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 16:09:26,089 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-01-27 16:09:26,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:09:26,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1376029380, now seen corresponding path program 1 times [2024-01-27 16:09:26,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:09:26,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960268060] [2024-01-27 16:09:26,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:09:26,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:09:26,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:09:26,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:09:26,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:09:26,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960268060] [2024-01-27 16:09:26,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960268060] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 16:09:26,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 16:09:26,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 16:09:26,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000644115] [2024-01-27 16:09:26,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 16:09:26,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 16:09:26,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:09:26,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 16:09:26,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-01-27 16:09:26,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-01-27 16:09:26,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 46 transitions, 149 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:09:26,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:09:26,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-01-27 16:09:26,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:09:27,932 INFO L124 PetriNetUnfolderBase]: 12743/18302 cut-off events. [2024-01-27 16:09:27,932 INFO L125 PetriNetUnfolderBase]: For 17020/17030 co-relation queries the response was YES. [2024-01-27 16:09:27,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49047 conditions, 18302 events. 12743/18302 cut-off events. For 17020/17030 co-relation queries the response was YES. Maximal size of possible extension queue 862. Compared 117495 event pairs, 2113 based on Foata normal form. 490/18700 useless extension candidates. Maximal degree in co-relation 49032. Up to 11481 conditions per place. [2024-01-27 16:09:28,018 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 44 selfloop transitions, 3 changer transitions 55/115 dead transitions. [2024-01-27 16:09:28,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 115 transitions, 603 flow [2024-01-27 16:09:28,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 16:09:28,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 16:09:28,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 219 transitions. [2024-01-27 16:09:28,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6257142857142857 [2024-01-27 16:09:28,020 INFO L175 Difference]: Start difference. First operand has 64 places, 46 transitions, 149 flow. Second operand 7 states and 219 transitions. [2024-01-27 16:09:28,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 115 transitions, 603 flow [2024-01-27 16:09:28,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 115 transitions, 590 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-01-27 16:09:28,188 INFO L231 Difference]: Finished difference. Result has 66 places, 46 transitions, 159 flow [2024-01-27 16:09:28,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=159, PETRI_PLACES=66, PETRI_TRANSITIONS=46} [2024-01-27 16:09:28,189 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 8 predicate places. [2024-01-27 16:09:28,189 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 46 transitions, 159 flow [2024-01-27 16:09:28,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:09:28,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:09:28,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:09:28,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 16:09:28,190 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-01-27 16:09:28,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:09:28,190 INFO L85 PathProgramCache]: Analyzing trace with hash -2053462728, now seen corresponding path program 1 times [2024-01-27 16:09:28,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:09:28,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323310608] [2024-01-27 16:09:28,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:09:28,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:09:28,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:09:28,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:09:28,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:09:28,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323310608] [2024-01-27 16:09:28,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323310608] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 16:09:28,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 16:09:28,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 16:09:28,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489942713] [2024-01-27 16:09:28,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 16:09:28,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 16:09:28,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:09:28,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 16:09:28,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-01-27 16:09:28,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 50 [2024-01-27 16:09:28,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 46 transitions, 159 flow. Second operand has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:09:28,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:09:28,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 50 [2024-01-27 16:09:28,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:09:29,523 INFO L124 PetriNetUnfolderBase]: 7723/12036 cut-off events. [2024-01-27 16:09:29,524 INFO L125 PetriNetUnfolderBase]: For 9367/9685 co-relation queries the response was YES. [2024-01-27 16:09:29,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29841 conditions, 12036 events. 7723/12036 cut-off events. For 9367/9685 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 83813 event pairs, 1471 based on Foata normal form. 320/11974 useless extension candidates. Maximal degree in co-relation 29822. Up to 6904 conditions per place. [2024-01-27 16:09:29,577 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 36 selfloop transitions, 3 changer transitions 41/100 dead transitions. [2024-01-27 16:09:29,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 100 transitions, 457 flow [2024-01-27 16:09:29,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 16:09:29,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 16:09:29,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 228 transitions. [2024-01-27 16:09:29,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6514285714285715 [2024-01-27 16:09:29,581 INFO L175 Difference]: Start difference. First operand has 66 places, 46 transitions, 159 flow. Second operand 7 states and 228 transitions. [2024-01-27 16:09:29,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 100 transitions, 457 flow [2024-01-27 16:09:29,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 100 transitions, 435 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-01-27 16:09:29,667 INFO L231 Difference]: Finished difference. Result has 67 places, 46 transitions, 164 flow [2024-01-27 16:09:29,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=164, PETRI_PLACES=67, PETRI_TRANSITIONS=46} [2024-01-27 16:09:29,668 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 9 predicate places. [2024-01-27 16:09:29,668 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 46 transitions, 164 flow [2024-01-27 16:09:29,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:09:29,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:09:29,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:09:29,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-27 16:09:29,669 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-01-27 16:09:29,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:09:29,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1684735618, now seen corresponding path program 1 times [2024-01-27 16:09:29,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:09:29,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913376713] [2024-01-27 16:09:29,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:09:29,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:09:29,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:09:29,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:09:29,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:09:29,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913376713] [2024-01-27 16:09:29,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913376713] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 16:09:29,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 16:09:29,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 16:09:29,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832826310] [2024-01-27 16:09:29,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 16:09:29,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 16:09:29,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:09:29,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 16:09:29,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 16:09:29,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 50 [2024-01-27 16:09:29,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 46 transitions, 164 flow. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:09:29,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:09:29,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 50 [2024-01-27 16:09:29,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:09:31,347 INFO L124 PetriNetUnfolderBase]: 12790/19128 cut-off events. [2024-01-27 16:09:31,348 INFO L125 PetriNetUnfolderBase]: For 8528/8861 co-relation queries the response was YES. [2024-01-27 16:09:31,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43231 conditions, 19128 events. 12790/19128 cut-off events. For 8528/8861 co-relation queries the response was YES. Maximal size of possible extension queue 1098. Compared 133743 event pairs, 2080 based on Foata normal form. 687/19066 useless extension candidates. Maximal degree in co-relation 43211. Up to 9086 conditions per place. [2024-01-27 16:09:31,433 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 53 selfloop transitions, 6 changer transitions 0/78 dead transitions. [2024-01-27 16:09:31,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 78 transitions, 352 flow [2024-01-27 16:09:31,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 16:09:31,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 16:09:31,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 141 transitions. [2024-01-27 16:09:31,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.705 [2024-01-27 16:09:31,437 INFO L175 Difference]: Start difference. First operand has 67 places, 46 transitions, 164 flow. Second operand 4 states and 141 transitions. [2024-01-27 16:09:31,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 78 transitions, 352 flow [2024-01-27 16:09:31,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 78 transitions, 338 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-01-27 16:09:31,681 INFO L231 Difference]: Finished difference. Result has 62 places, 51 transitions, 196 flow [2024-01-27 16:09:31,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=196, PETRI_PLACES=62, PETRI_TRANSITIONS=51} [2024-01-27 16:09:31,690 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 4 predicate places. [2024-01-27 16:09:31,690 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 51 transitions, 196 flow [2024-01-27 16:09:31,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:09:31,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:09:31,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:09:31,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-27 16:09:31,695 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-01-27 16:09:31,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:09:31,696 INFO L85 PathProgramCache]: Analyzing trace with hash 119061167, now seen corresponding path program 1 times [2024-01-27 16:09:31,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:09:31,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828684429] [2024-01-27 16:09:31,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:09:31,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:09:31,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:09:31,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:09:31,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:09:31,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828684429] [2024-01-27 16:09:31,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828684429] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 16:09:31,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 16:09:31,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 16:09:31,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945029550] [2024-01-27 16:09:31,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 16:09:31,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 16:09:31,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:09:31,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 16:09:31,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-27 16:09:31,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 50 [2024-01-27 16:09:31,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 51 transitions, 196 flow. Second operand has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:09:31,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:09:31,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 50 [2024-01-27 16:09:31,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:09:33,148 INFO L124 PetriNetUnfolderBase]: 10872/16282 cut-off events. [2024-01-27 16:09:33,148 INFO L125 PetriNetUnfolderBase]: For 6182/6358 co-relation queries the response was YES. [2024-01-27 16:09:33,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39684 conditions, 16282 events. 10872/16282 cut-off events. For 6182/6358 co-relation queries the response was YES. Maximal size of possible extension queue 890. Compared 109837 event pairs, 1313 based on Foata normal form. 602/16204 useless extension candidates. Maximal degree in co-relation 39666. Up to 5576 conditions per place. [2024-01-27 16:09:33,288 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 69 selfloop transitions, 10 changer transitions 0/98 dead transitions. [2024-01-27 16:09:33,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 98 transitions, 477 flow [2024-01-27 16:09:33,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 16:09:33,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 16:09:33,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 181 transitions. [2024-01-27 16:09:33,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.724 [2024-01-27 16:09:33,290 INFO L175 Difference]: Start difference. First operand has 62 places, 51 transitions, 196 flow. Second operand 5 states and 181 transitions. [2024-01-27 16:09:33,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 98 transitions, 477 flow [2024-01-27 16:09:33,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 98 transitions, 474 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 16:09:33,295 INFO L231 Difference]: Finished difference. Result has 67 places, 56 transitions, 261 flow [2024-01-27 16:09:33,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=261, PETRI_PLACES=67, PETRI_TRANSITIONS=56} [2024-01-27 16:09:33,298 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 9 predicate places. [2024-01-27 16:09:33,298 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 56 transitions, 261 flow [2024-01-27 16:09:33,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:09:33,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:09:33,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:09:33,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-27 16:09:33,299 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-01-27 16:09:33,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:09:33,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1024784505, now seen corresponding path program 1 times [2024-01-27 16:09:33,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:09:33,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756210234] [2024-01-27 16:09:33,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:09:33,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:09:33,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:09:33,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:09:33,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:09:33,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756210234] [2024-01-27 16:09:33,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756210234] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 16:09:33,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 16:09:33,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 16:09:33,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071741639] [2024-01-27 16:09:33,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 16:09:33,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 16:09:33,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:09:33,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 16:09:33,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-01-27 16:09:33,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 50 [2024-01-27 16:09:33,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 56 transitions, 261 flow. Second operand has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:09:33,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:09:33,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 50 [2024-01-27 16:09:33,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:09:34,724 INFO L124 PetriNetUnfolderBase]: 8800/12994 cut-off events. [2024-01-27 16:09:34,724 INFO L125 PetriNetUnfolderBase]: For 12646/12718 co-relation queries the response was YES. [2024-01-27 16:09:34,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35437 conditions, 12994 events. 8800/12994 cut-off events. For 12646/12718 co-relation queries the response was YES. Maximal size of possible extension queue 742. Compared 82473 event pairs, 1007 based on Foata normal form. 364/12728 useless extension candidates. Maximal degree in co-relation 35416. Up to 4412 conditions per place. [2024-01-27 16:09:34,779 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 83 selfloop transitions, 14 changer transitions 0/116 dead transitions. [2024-01-27 16:09:34,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 116 transitions, 624 flow [2024-01-27 16:09:34,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 16:09:34,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 16:09:34,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 219 transitions. [2024-01-27 16:09:34,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.73 [2024-01-27 16:09:34,781 INFO L175 Difference]: Start difference. First operand has 67 places, 56 transitions, 261 flow. Second operand 6 states and 219 transitions. [2024-01-27 16:09:34,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 116 transitions, 624 flow [2024-01-27 16:09:34,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 116 transitions, 608 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-01-27 16:09:34,790 INFO L231 Difference]: Finished difference. Result has 72 places, 61 transitions, 331 flow [2024-01-27 16:09:34,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=331, PETRI_PLACES=72, PETRI_TRANSITIONS=61} [2024-01-27 16:09:34,791 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 14 predicate places. [2024-01-27 16:09:34,791 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 61 transitions, 331 flow [2024-01-27 16:09:34,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:09:34,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:09:34,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:09:34,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-27 16:09:34,792 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-01-27 16:09:34,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:09:34,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1773092363, now seen corresponding path program 1 times [2024-01-27 16:09:34,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:09:34,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671391237] [2024-01-27 16:09:34,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:09:34,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:09:34,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:09:35,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:09:35,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:09:35,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671391237] [2024-01-27 16:09:35,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671391237] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 16:09:35,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 16:09:35,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-01-27 16:09:35,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963203382] [2024-01-27 16:09:35,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 16:09:35,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-27 16:09:35,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:09:35,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-27 16:09:35,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-01-27 16:09:35,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-01-27 16:09:35,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 61 transitions, 331 flow. Second operand has 9 states, 9 states have (on average 19.555555555555557) internal successors, (176), 9 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:09:35,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:09:35,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-01-27 16:09:35,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:09:37,925 INFO L124 PetriNetUnfolderBase]: 15155/24392 cut-off events. [2024-01-27 16:09:37,925 INFO L125 PetriNetUnfolderBase]: For 42213/45718 co-relation queries the response was YES. [2024-01-27 16:09:38,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73667 conditions, 24392 events. 15155/24392 cut-off events. For 42213/45718 co-relation queries the response was YES. Maximal size of possible extension queue 1250. Compared 191098 event pairs, 4669 based on Foata normal form. 604/23312 useless extension candidates. Maximal degree in co-relation 73644. Up to 6938 conditions per place. [2024-01-27 16:09:38,135 INFO L140 encePairwiseOnDemand]: 35/50 looper letters, 116 selfloop transitions, 18 changer transitions 33/195 dead transitions. [2024-01-27 16:09:38,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 195 transitions, 1150 flow [2024-01-27 16:09:38,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-27 16:09:38,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-27 16:09:38,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 373 transitions. [2024-01-27 16:09:38,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6216666666666667 [2024-01-27 16:09:38,140 INFO L175 Difference]: Start difference. First operand has 72 places, 61 transitions, 331 flow. Second operand 12 states and 373 transitions. [2024-01-27 16:09:38,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 195 transitions, 1150 flow [2024-01-27 16:09:38,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 195 transitions, 1119 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-01-27 16:09:38,393 INFO L231 Difference]: Finished difference. Result has 87 places, 73 transitions, 433 flow [2024-01-27 16:09:38,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=433, PETRI_PLACES=87, PETRI_TRANSITIONS=73} [2024-01-27 16:09:38,394 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 29 predicate places. [2024-01-27 16:09:38,394 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 73 transitions, 433 flow [2024-01-27 16:09:38,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 19.555555555555557) internal successors, (176), 9 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:09:38,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:09:38,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:09:38,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-01-27 16:09:38,395 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-01-27 16:09:38,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:09:38,395 INFO L85 PathProgramCache]: Analyzing trace with hash -85077433, now seen corresponding path program 2 times [2024-01-27 16:09:38,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:09:38,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647889953] [2024-01-27 16:09:38,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:09:38,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:09:38,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:09:38,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:09:38,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:09:38,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647889953] [2024-01-27 16:09:38,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647889953] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 16:09:38,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 16:09:38,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-27 16:09:38,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017178533] [2024-01-27 16:09:38,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 16:09:38,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-27 16:09:38,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:09:38,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-27 16:09:38,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-01-27 16:09:38,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-01-27 16:09:38,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 73 transitions, 433 flow. Second operand has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:09:38,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:09:38,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-01-27 16:09:38,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:09:42,217 INFO L124 PetriNetUnfolderBase]: 25239/39902 cut-off events. [2024-01-27 16:09:42,217 INFO L125 PetriNetUnfolderBase]: For 92230/104412 co-relation queries the response was YES. [2024-01-27 16:09:42,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130385 conditions, 39902 events. 25239/39902 cut-off events. For 92230/104412 co-relation queries the response was YES. Maximal size of possible extension queue 2369. Compared 327570 event pairs, 3748 based on Foata normal form. 1130/37719 useless extension candidates. Maximal degree in co-relation 130355. Up to 17460 conditions per place. [2024-01-27 16:09:42,558 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 82 selfloop transitions, 17 changer transitions 33/159 dead transitions. [2024-01-27 16:09:42,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 159 transitions, 1145 flow [2024-01-27 16:09:42,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-27 16:09:42,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-27 16:09:42,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 235 transitions. [2024-01-27 16:09:42,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-01-27 16:09:42,560 INFO L175 Difference]: Start difference. First operand has 87 places, 73 transitions, 433 flow. Second operand 8 states and 235 transitions. [2024-01-27 16:09:42,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 159 transitions, 1145 flow [2024-01-27 16:09:42,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 159 transitions, 1107 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-01-27 16:09:42,910 INFO L231 Difference]: Finished difference. Result has 90 places, 80 transitions, 507 flow [2024-01-27 16:09:42,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=507, PETRI_PLACES=90, PETRI_TRANSITIONS=80} [2024-01-27 16:09:42,911 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 32 predicate places. [2024-01-27 16:09:42,912 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 80 transitions, 507 flow [2024-01-27 16:09:42,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:09:42,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:09:42,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:09:42,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-01-27 16:09:42,913 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-01-27 16:09:42,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:09:42,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1625506123, now seen corresponding path program 3 times [2024-01-27 16:09:42,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:09:42,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151644107] [2024-01-27 16:09:42,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:09:42,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:09:42,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:09:43,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:09:43,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:09:43,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151644107] [2024-01-27 16:09:43,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151644107] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 16:09:43,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 16:09:43,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-01-27 16:09:43,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199527043] [2024-01-27 16:09:43,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 16:09:43,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-27 16:09:43,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:09:43,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-27 16:09:43,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-01-27 16:09:43,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-01-27 16:09:43,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 80 transitions, 507 flow. Second operand has 9 states, 9 states have (on average 19.555555555555557) internal successors, (176), 9 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:09:43,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:09:43,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-01-27 16:09:43,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:09:49,835 INFO L124 PetriNetUnfolderBase]: 36829/59229 cut-off events. [2024-01-27 16:09:49,835 INFO L125 PetriNetUnfolderBase]: For 141515/153342 co-relation queries the response was YES. [2024-01-27 16:09:50,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193207 conditions, 59229 events. 36829/59229 cut-off events. For 141515/153342 co-relation queries the response was YES. Maximal size of possible extension queue 3787. Compared 535484 event pairs, 11083 based on Foata normal form. 1512/55361 useless extension candidates. Maximal degree in co-relation 193175. Up to 28291 conditions per place. [2024-01-27 16:09:50,256 INFO L140 encePairwiseOnDemand]: 34/50 looper letters, 125 selfloop transitions, 48 changer transitions 30/232 dead transitions. [2024-01-27 16:09:50,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 232 transitions, 1722 flow [2024-01-27 16:09:50,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-27 16:09:50,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-27 16:09:50,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 420 transitions. [2024-01-27 16:09:50,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-01-27 16:09:50,261 INFO L175 Difference]: Start difference. First operand has 90 places, 80 transitions, 507 flow. Second operand 14 states and 420 transitions. [2024-01-27 16:09:50,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 232 transitions, 1722 flow [2024-01-27 16:09:51,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 232 transitions, 1706 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-01-27 16:09:51,098 INFO L231 Difference]: Finished difference. Result has 108 places, 116 transitions, 894 flow [2024-01-27 16:09:51,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=503, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=894, PETRI_PLACES=108, PETRI_TRANSITIONS=116} [2024-01-27 16:09:51,098 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 50 predicate places. [2024-01-27 16:09:51,098 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 116 transitions, 894 flow [2024-01-27 16:09:51,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 19.555555555555557) internal successors, (176), 9 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:09:51,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:09:51,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:09:51,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-01-27 16:09:51,099 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-01-27 16:09:51,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:09:51,100 INFO L85 PathProgramCache]: Analyzing trace with hash -586994591, now seen corresponding path program 4 times [2024-01-27 16:09:51,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:09:51,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959148420] [2024-01-27 16:09:51,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:09:51,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:09:51,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:09:51,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:09:51,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:09:51,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959148420] [2024-01-27 16:09:51,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959148420] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 16:09:51,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 16:09:51,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-27 16:09:51,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766294217] [2024-01-27 16:09:51,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 16:09:51,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-27 16:09:51,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:09:51,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-27 16:09:51,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-01-27 16:09:51,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 50 [2024-01-27 16:09:51,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 116 transitions, 894 flow. Second operand has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:09:51,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:09:51,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 50 [2024-01-27 16:09:51,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand