./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/01b_inc.i --full-output --traceabstraction.positions.where.we.compute.the.hoare.annotation All --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 448d4d75 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-ext/01b_inc.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 a50cd99e32ae608752174b749acce795b64973c8c13edb78d7146b3ab3630fc9 --traceabstraction.positions.where.we.compute.the.hoare.annotation All --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.owicki-witnesses-448d4d7-m [2024-02-20 11:25:46,129 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-20 11:25:46,208 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-20 11:25:46,215 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-20 11:25:46,216 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-20 11:25:46,227 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-20 11:25:46,231 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-20 11:25:46,232 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-20 11:25:46,233 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-20 11:25:46,236 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-20 11:25:46,237 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-20 11:25:46,237 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-20 11:25:46,237 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-20 11:25:46,238 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-20 11:25:46,238 INFO L153 SettingsManager]: * Use SBE=true [2024-02-20 11:25:46,239 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-20 11:25:46,239 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-20 11:25:46,239 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-20 11:25:46,239 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-20 11:25:46,239 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-20 11:25:46,240 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-20 11:25:46,240 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-20 11:25:46,240 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-20 11:25:46,240 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-20 11:25:46,241 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-20 11:25:46,241 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-20 11:25:46,241 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-20 11:25:46,241 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-20 11:25:46,242 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-20 11:25:46,242 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-20 11:25:46,243 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-20 11:25:46,243 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-20 11:25:46,243 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-20 11:25:46,243 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-20 11:25:46,243 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-20 11:25:46,244 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-20 11:25:46,244 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-20 11:25:46,244 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-20 11:25:46,244 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-20 11:25:46,244 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-20 11:25:46,245 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-20 11:25:46,245 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-20 11:25:46,245 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-20 11:25:46,245 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a50cd99e32ae608752174b749acce795b64973c8c13edb78d7146b3ab3630fc9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All [2024-02-20 11:25:46,443 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-20 11:25:46,463 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-20 11:25:46,465 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-20 11:25:46,466 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-20 11:25:46,466 INFO L274 PluginConnector]: CDTParser initialized [2024-02-20 11:25:46,467 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/01b_inc.i [2024-02-20 11:25:47,430 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-20 11:25:47,633 INFO L384 CDTParser]: Found 1 translation units. [2024-02-20 11:25:47,636 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/01b_inc.i [2024-02-20 11:25:47,652 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2853313a/eff4ba66e603478f938dbe252c562ad6/FLAGb7260b969 [2024-02-20 11:25:47,665 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2853313a/eff4ba66e603478f938dbe252c562ad6 [2024-02-20 11:25:47,667 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-20 11:25:47,673 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-02-20 11:25:47,681 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-20 11:25:47,685 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-20 11:25:47,691 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-20 11:25:47,693 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 11:25:47" (1/1) ... [2024-02-20 11:25:47,693 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4773e6bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:25:47, skipping insertion in model container [2024-02-20 11:25:47,693 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 11:25:47" (1/1) ... [2024-02-20 11:25:47,731 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-02-20 11:25:47,964 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-ext/01b_inc.i[31005,31018] [2024-02-20 11:25:47,973 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-20 11:25:48,004 INFO L202 MainTranslator]: Completed pre-run [2024-02-20 11:25:48,073 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-ext/01b_inc.i[31005,31018] [2024-02-20 11:25:48,087 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-20 11:25:48,129 INFO L206 MainTranslator]: Completed translation [2024-02-20 11:25:48,129 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:25:48 WrapperNode [2024-02-20 11:25:48,129 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-20 11:25:48,131 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-20 11:25:48,131 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-20 11:25:48,131 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-20 11:25:48,136 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:25:48" (1/1) ... [2024-02-20 11:25:48,160 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:25:48" (1/1) ... [2024-02-20 11:25:48,173 INFO L138 Inliner]: procedures = 172, calls = 19, calls flagged for inlining = 7, calls inlined = 8, statements flattened = 61 [2024-02-20 11:25:48,174 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-20 11:25:48,174 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-20 11:25:48,175 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-20 11:25:48,175 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-20 11:25:48,181 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:25:48" (1/1) ... [2024-02-20 11:25:48,182 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:25:48" (1/1) ... [2024-02-20 11:25:48,183 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:25:48" (1/1) ... [2024-02-20 11:25:48,197 INFO L175 MemorySlicer]: Split 3 memory accesses to 2 slices as follows [2, 1]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-02-20 11:25:48,198 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:25:48" (1/1) ... [2024-02-20 11:25:48,198 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:25:48" (1/1) ... [2024-02-20 11:25:48,201 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:25:48" (1/1) ... [2024-02-20 11:25:48,210 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:25:48" (1/1) ... [2024-02-20 11:25:48,211 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:25:48" (1/1) ... [2024-02-20 11:25:48,217 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:25:48" (1/1) ... [2024-02-20 11:25:48,219 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-20 11:25:48,219 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-20 11:25:48,219 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-20 11:25:48,219 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-20 11:25:48,220 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:25:48" (1/1) ... [2024-02-20 11:25:48,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-20 11:25:48,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:25:48,244 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) [2024-02-20 11:25:48,251 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 [2024-02-20 11:25:48,275 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-02-20 11:25:48,276 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-02-20 11:25:48,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-20 11:25:48,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-20 11:25:48,276 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-02-20 11:25:48,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-20 11:25:48,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-20 11:25:48,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-20 11:25:48,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-20 11:25:48,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-20 11:25:48,277 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-02-20 11:25:48,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-20 11:25:48,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-20 11:25:48,278 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-20 11:25:48,367 INFO L244 CfgBuilder]: Building ICFG [2024-02-20 11:25:48,369 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-20 11:25:48,472 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-20 11:25:48,472 INFO L293 CfgBuilder]: Performing block encoding [2024-02-20 11:25:48,535 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-20 11:25:48,535 INFO L320 CfgBuilder]: Removed 1 assume(true) statements. [2024-02-20 11:25:48,535 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 11:25:48 BoogieIcfgContainer [2024-02-20 11:25:48,536 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-20 11:25:48,537 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-20 11:25:48,544 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-20 11:25:48,546 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-20 11:25:48,547 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.02 11:25:47" (1/3) ... [2024-02-20 11:25:48,547 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62915fdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 11:25:48, skipping insertion in model container [2024-02-20 11:25:48,548 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:25:48" (2/3) ... [2024-02-20 11:25:48,548 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62915fdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 11:25:48, skipping insertion in model container [2024-02-20 11:25:48,549 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 11:25:48" (3/3) ... [2024-02-20 11:25:48,550 INFO L112 eAbstractionObserver]: Analyzing ICFG 01b_inc.i [2024-02-20 11:25:48,561 INFO L221 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-20 11:25:48,562 INFO L180 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-02-20 11:25:48,562 INFO L635 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-20 11:25:48,583 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-20 11:25:48,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 20 places, 18 transitions, 40 flow [2024-02-20 11:25:48,630 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2024-02-20 11:25:48,631 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-20 11:25:48,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24 conditions, 20 events. 1/20 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 28 event pairs, 0 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2024-02-20 11:25:48,634 INFO L82 GeneralOperation]: Start removeDead. Operand has 20 places, 18 transitions, 40 flow [2024-02-20 11:25:48,639 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 20 places, 18 transitions, 40 flow [2024-02-20 11:25:48,649 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-20 11:25:48,658 INFO L369 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=All, 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;@1f4ad611, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-20 11:25:48,658 INFO L370 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-02-20 11:25:48,666 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-20 11:25:48,667 INFO L124 PetriNetUnfolderBase]: 0/9 cut-off events. [2024-02-20 11:25:48,667 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-20 11:25:48,667 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:25:48,667 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-02-20 11:25:48,670 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-02-20 11:25:48,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:25:48,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1623239452, now seen corresponding path program 1 times [2024-02-20 11:25:48,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:25:48,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116345920] [2024-02-20 11:25:48,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:25:48,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:25:48,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-20 11:25:48,777 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-20 11:25:48,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-20 11:25:48,802 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-20 11:25:48,806 INFO L372 BasicCegarLoop]: Counterexample is feasible [2024-02-20 11:25:48,807 INFO L818 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-02-20 11:25:48,808 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-02-20 11:25:48,817 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2024-02-20 11:25:48,818 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-20 11:25:48,818 INFO L457 BasicCegarLoop]: Path program histogram: [1] [2024-02-20 11:25:48,821 WARN L345 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-20 11:25:48,821 INFO L635 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-02-20 11:25:48,840 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-20 11:25:48,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 31 transitions, 72 flow [2024-02-20 11:25:48,849 INFO L124 PetriNetUnfolderBase]: 2/36 cut-off events. [2024-02-20 11:25:48,849 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-20 11:25:48,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 36 events. 2/36 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 79 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 27. Up to 3 conditions per place. [2024-02-20 11:25:48,850 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 31 transitions, 72 flow [2024-02-20 11:25:48,850 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 31 transitions, 72 flow [2024-02-20 11:25:48,852 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-20 11:25:48,852 INFO L369 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=All, 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;@1f4ad611, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-20 11:25:48,852 INFO L370 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-02-20 11:25:48,857 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-20 11:25:48,857 INFO L124 PetriNetUnfolderBase]: 0/21 cut-off events. [2024-02-20 11:25:48,857 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-20 11:25:48,857 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:25:48,857 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-02-20 11:25:48,858 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-02-20 11:25:48,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:25:48,858 INFO L85 PathProgramCache]: Analyzing trace with hash -688617243, now seen corresponding path program 1 times [2024-02-20 11:25:48,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:25:48,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040871641] [2024-02-20 11:25:48,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:25:48,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:25:48,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-20 11:25:48,886 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-20 11:25:48,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-20 11:25:48,912 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-20 11:25:48,913 INFO L372 BasicCegarLoop]: Counterexample is feasible [2024-02-20 11:25:48,913 INFO L818 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-02-20 11:25:48,913 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-02-20 11:25:48,914 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-02-20 11:25:48,914 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-02-20 11:25:48,914 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-20 11:25:48,914 INFO L457 BasicCegarLoop]: Path program histogram: [1] [2024-02-20 11:25:48,915 WARN L345 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-20 11:25:48,915 INFO L635 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-02-20 11:25:48,937 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-20 11:25:48,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 48 places, 44 transitions, 106 flow [2024-02-20 11:25:48,954 INFO L124 PetriNetUnfolderBase]: 3/52 cut-off events. [2024-02-20 11:25:48,954 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-02-20 11:25:48,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 52 events. 3/52 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 139 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 43. Up to 4 conditions per place. [2024-02-20 11:25:48,955 INFO L82 GeneralOperation]: Start removeDead. Operand has 48 places, 44 transitions, 106 flow [2024-02-20 11:25:48,956 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 48 places, 44 transitions, 106 flow [2024-02-20 11:25:48,957 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-20 11:25:48,957 INFO L369 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=All, 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;@1f4ad611, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-20 11:25:48,958 INFO L370 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-02-20 11:25:48,962 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-20 11:25:48,965 INFO L124 PetriNetUnfolderBase]: 0/25 cut-off events. [2024-02-20 11:25:48,965 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-02-20 11:25:48,965 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:25:48,965 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:25:48,966 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-02-20 11:25:48,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:25:48,966 INFO L85 PathProgramCache]: Analyzing trace with hash 899996420, now seen corresponding path program 1 times [2024-02-20 11:25:48,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:25:48,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304869017] [2024-02-20 11:25:48,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:25:48,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:25:48,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:25:49,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:25:49,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:25:49,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304869017] [2024-02-20 11:25:49,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304869017] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 11:25:49,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 11:25:49,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-20 11:25:49,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819838530] [2024-02-20 11:25:49,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:25:49,219 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-20 11:25:49,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:25:49,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-20 11:25:49,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-02-20 11:25:49,266 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-02-20 11:25:49,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 44 transitions, 106 flow. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:25:49,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:25:49,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-02-20 11:25:49,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:25:50,450 INFO L124 PetriNetUnfolderBase]: 9507/16241 cut-off events. [2024-02-20 11:25:50,451 INFO L125 PetriNetUnfolderBase]: For 661/661 co-relation queries the response was YES. [2024-02-20 11:25:50,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30381 conditions, 16241 events. 9507/16241 cut-off events. For 661/661 co-relation queries the response was YES. Maximal size of possible extension queue 843. Compared 124471 event pairs, 2493 based on Foata normal form. 0/13946 useless extension candidates. Maximal degree in co-relation 23420. Up to 5955 conditions per place. [2024-02-20 11:25:50,556 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 97 selfloop transitions, 12 changer transitions 0/119 dead transitions. [2024-02-20 11:25:50,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 119 transitions, 512 flow [2024-02-20 11:25:50,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-20 11:25:50,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-20 11:25:50,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-02-20 11:25:50,569 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6818181818181818 [2024-02-20 11:25:50,572 INFO L308 CegarLoopForPetriNet]: 48 programPoint places, 4 predicate places. [2024-02-20 11:25:50,572 INFO L507 AbstractCegarLoop]: Abstraction has has 52 places, 119 transitions, 512 flow [2024-02-20 11:25:50,572 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:25:50,572 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:25:50,576 INFO L234 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2024-02-20 11:25:50,576 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-20 11:25:50,577 INFO L432 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-02-20 11:25:50,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:25:50,577 INFO L85 PathProgramCache]: Analyzing trace with hash 589427963, now seen corresponding path program 1 times [2024-02-20 11:25:50,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:25:50,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515224017] [2024-02-20 11:25:50,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:25:50,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:25:50,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-20 11:25:50,639 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-20 11:25:50,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-20 11:25:50,652 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-20 11:25:50,654 INFO L372 BasicCegarLoop]: Counterexample is feasible [2024-02-20 11:25:50,654 INFO L818 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-02-20 11:25:50,655 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-02-20 11:25:50,655 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-02-20 11:25:50,655 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-02-20 11:25:50,655 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-02-20 11:25:50,655 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-20 11:25:50,656 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1] [2024-02-20 11:25:50,656 WARN L345 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-20 11:25:50,656 INFO L635 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-02-20 11:25:50,674 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-20 11:25:50,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 57 transitions, 142 flow [2024-02-20 11:25:50,680 INFO L124 PetriNetUnfolderBase]: 4/68 cut-off events. [2024-02-20 11:25:50,681 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-02-20 11:25:50,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 68 events. 4/68 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 191 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 64. Up to 5 conditions per place. [2024-02-20 11:25:50,681 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 57 transitions, 142 flow [2024-02-20 11:25:50,682 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 57 transitions, 142 flow [2024-02-20 11:25:50,683 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-20 11:25:50,683 INFO L369 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=All, 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;@1f4ad611, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-20 11:25:50,683 INFO L370 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-02-20 11:25:50,685 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-20 11:25:50,686 INFO L124 PetriNetUnfolderBase]: 0/25 cut-off events. [2024-02-20 11:25:50,686 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-02-20 11:25:50,686 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:25:50,686 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:25:50,686 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-02-20 11:25:50,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:25:50,687 INFO L85 PathProgramCache]: Analyzing trace with hash 364751433, now seen corresponding path program 1 times [2024-02-20 11:25:50,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:25:50,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145122688] [2024-02-20 11:25:50,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:25:50,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:25:50,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:25:50,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:25:50,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:25:50,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145122688] [2024-02-20 11:25:50,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145122688] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 11:25:50,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 11:25:50,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-20 11:25:50,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018041355] [2024-02-20 11:25:50,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:25:50,775 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-20 11:25:50,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:25:50,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-20 11:25:50,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-02-20 11:25:50,793 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 57 [2024-02-20 11:25:50,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:25:50,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:25:50,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 57 [2024-02-20 11:25:50,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:26:02,912 INFO L124 PetriNetUnfolderBase]: 154743/231464 cut-off events. [2024-02-20 11:26:02,913 INFO L125 PetriNetUnfolderBase]: For 13952/13952 co-relation queries the response was YES. [2024-02-20 11:26:03,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 439869 conditions, 231464 events. 154743/231464 cut-off events. For 13952/13952 co-relation queries the response was YES. Maximal size of possible extension queue 8286. Compared 1975790 event pairs, 47541 based on Foata normal form. 0/194573 useless extension candidates. Maximal degree in co-relation 178754. Up to 95643 conditions per place. [2024-02-20 11:26:04,189 INFO L140 encePairwiseOnDemand]: 44/57 looper letters, 134 selfloop transitions, 15 changer transitions 0/162 dead transitions. [2024-02-20 11:26:04,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 162 transitions, 724 flow [2024-02-20 11:26:04,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-20 11:26:04,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-20 11:26:04,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 240 transitions. [2024-02-20 11:26:04,191 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7017543859649122 [2024-02-20 11:26:04,192 INFO L308 CegarLoopForPetriNet]: 62 programPoint places, 4 predicate places. [2024-02-20 11:26:04,192 INFO L507 AbstractCegarLoop]: Abstraction has has 66 places, 162 transitions, 724 flow [2024-02-20 11:26:04,192 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:26:04,192 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:26:04,192 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:26:04,193 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-20 11:26:04,193 INFO L432 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-02-20 11:26:04,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:26:04,193 INFO L85 PathProgramCache]: Analyzing trace with hash -169247421, now seen corresponding path program 1 times [2024-02-20 11:26:04,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:26:04,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477781658] [2024-02-20 11:26:04,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:26:04,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:26:04,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:26:04,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 11:26:04,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:26:04,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477781658] [2024-02-20 11:26:04,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477781658] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 11:26:04,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 11:26:04,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-20 11:26:04,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173833081] [2024-02-20 11:26:04,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:26:04,267 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-20 11:26:04,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:26:04,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-20 11:26:04,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-02-20 11:26:04,280 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 57 [2024-02-20 11:26:04,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 162 transitions, 724 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:26:04,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:26:04,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 57 [2024-02-20 11:26:04,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:26:24,882 INFO L124 PetriNetUnfolderBase]: 236418/360044 cut-off events. [2024-02-20 11:26:24,882 INFO L125 PetriNetUnfolderBase]: For 19834/19834 co-relation queries the response was YES. [2024-02-20 11:26:25,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 995888 conditions, 360044 events. 236418/360044 cut-off events. For 19834/19834 co-relation queries the response was YES. Maximal size of possible extension queue 13296. Compared 3367020 event pairs, 52482 based on Foata normal form. 0/303173 useless extension candidates. Maximal degree in co-relation 770130. Up to 156936 conditions per place. [2024-02-20 11:26:27,358 INFO L140 encePairwiseOnDemand]: 49/57 looper letters, 299 selfloop transitions, 30 changer transitions 0/342 dead transitions. [2024-02-20 11:26:27,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 342 transitions, 2200 flow [2024-02-20 11:26:27,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-20 11:26:27,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-20 11:26:27,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 227 transitions. [2024-02-20 11:26:27,362 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6637426900584795 [2024-02-20 11:26:27,365 INFO L308 CegarLoopForPetriNet]: 62 programPoint places, 9 predicate places. [2024-02-20 11:26:27,365 INFO L507 AbstractCegarLoop]: Abstraction has has 71 places, 342 transitions, 2200 flow [2024-02-20 11:26:27,366 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:26:27,366 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:26:27,366 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2024-02-20 11:26:27,369 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-20 11:26:27,369 INFO L432 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-02-20 11:26:27,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:26:27,370 INFO L85 PathProgramCache]: Analyzing trace with hash -2107054175, now seen corresponding path program 1 times [2024-02-20 11:26:27,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:26:27,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660922443] [2024-02-20 11:26:27,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:26:27,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:26:27,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-20 11:26:27,387 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-20 11:26:27,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-20 11:26:27,402 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-20 11:26:27,404 INFO L372 BasicCegarLoop]: Counterexample is feasible [2024-02-20 11:26:27,404 INFO L818 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2024-02-20 11:26:27,405 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2024-02-20 11:26:27,405 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2024-02-20 11:26:27,405 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2024-02-20 11:26:27,405 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2024-02-20 11:26:27,405 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2024-02-20 11:26:27,405 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-20 11:26:27,406 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-02-20 11:26:27,406 WARN L345 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-20 11:26:27,406 INFO L635 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2024-02-20 11:26:27,435 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-20 11:26:27,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 70 transitions, 180 flow [2024-02-20 11:26:27,445 INFO L124 PetriNetUnfolderBase]: 5/84 cut-off events. [2024-02-20 11:26:27,445 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-02-20 11:26:27,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110 conditions, 84 events. 5/84 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 241 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 86. Up to 6 conditions per place. [2024-02-20 11:26:27,446 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 70 transitions, 180 flow [2024-02-20 11:26:27,447 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 70 transitions, 180 flow [2024-02-20 11:26:27,448 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-20 11:26:27,448 INFO L369 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=All, 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;@1f4ad611, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-20 11:26:27,449 INFO L370 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-02-20 11:26:27,450 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-20 11:26:27,450 INFO L124 PetriNetUnfolderBase]: 0/25 cut-off events. [2024-02-20 11:26:27,451 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-02-20 11:26:27,451 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:26:27,451 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:26:27,451 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-20 11:26:27,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:26:27,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1611328027, now seen corresponding path program 1 times [2024-02-20 11:26:27,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:26:27,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872885985] [2024-02-20 11:26:27,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:26:27,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:26:27,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:26:27,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:26:27,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:26:27,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872885985] [2024-02-20 11:26:27,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872885985] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 11:26:27,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 11:26:27,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-20 11:26:27,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434570764] [2024-02-20 11:26:27,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:26:27,550 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-20 11:26:27,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:26:27,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-20 11:26:27,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-02-20 11:26:27,570 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 70 [2024-02-20 11:26:27,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 70 transitions, 180 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:26:27,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:26:27,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 70 [2024-02-20 11:26:27,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand