./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/36_stack_cas_p0_vs_concur.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de 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/36_stack_cas_p0_vs_concur.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 5bf99dd5722e6551de991a345b21615b777cf7cef3d452afb8b79773fd45d3d8 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 16:21:11,448 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 16:21:11,525 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 16:21:11,529 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 16:21:11,529 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 16:21:11,544 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 16:21:11,546 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 16:21:11,546 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 16:21:11,546 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 16:21:11,550 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 16:21:11,550 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 16:21:11,551 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 16:21:11,552 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 16:21:11,553 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 16:21:11,553 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 16:21:11,554 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 16:21:11,554 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 16:21:11,554 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 16:21:11,554 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 16:21:11,554 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 16:21:11,555 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 16:21:11,555 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 16:21:11,555 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 16:21:11,555 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 16:21:11,556 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 16:21:11,556 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 16:21:11,556 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 16:21:11,556 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 16:21:11,557 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 16:21:11,557 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 16:21:11,558 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 16:21:11,558 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 16:21:11,558 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:21:11,558 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 16:21:11,559 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 16:21:11,559 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 16:21:11,559 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 16:21:11,559 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 16:21:11,559 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 16:21:11,560 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 16:21:11,560 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 16:21:11,560 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 16:21:11,560 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 16:21:11,560 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bf99dd5722e6551de991a345b21615b777cf7cef3d452afb8b79773fd45d3d8 [2024-06-27 16:21:11,756 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 16:21:11,772 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 16:21:11,775 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 16:21:11,776 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 16:21:11,776 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 16:21:11,777 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/36_stack_cas_p0_vs_concur.i [2024-06-27 16:21:12,918 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 16:21:13,110 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 16:21:13,110 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/36_stack_cas_p0_vs_concur.i [2024-06-27 16:21:13,120 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cce460614/d1ec25d815ed4bc79fa692415798fd19/FLAGebac0218c [2024-06-27 16:21:13,131 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cce460614/d1ec25d815ed4bc79fa692415798fd19 [2024-06-27 16:21:13,133 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 16:21:13,135 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-06-27 16:21:13,137 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 16:21:13,137 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 16:21:13,141 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 16:21:13,143 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:21:13" (1/1) ... [2024-06-27 16:21:13,143 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e9dfc25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:21:13, skipping insertion in model container [2024-06-27 16:21:13,144 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:21:13" (1/1) ... [2024-06-27 16:21:13,188 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 16:21:13,482 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/36_stack_cas_p0_vs_concur.i[30869,30882] [2024-06-27 16:21:13,487 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:21:13,494 INFO L202 MainTranslator]: Completed pre-run [2024-06-27 16:21:13,535 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/36_stack_cas_p0_vs_concur.i[30869,30882] [2024-06-27 16:21:13,537 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:21:13,564 INFO L206 MainTranslator]: Completed translation [2024-06-27 16:21:13,565 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:21:13 WrapperNode [2024-06-27 16:21:13,565 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 16:21:13,566 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 16:21:13,566 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 16:21:13,567 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 16:21:13,572 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:21:13" (1/1) ... [2024-06-27 16:21:13,598 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:21:13" (1/1) ... [2024-06-27 16:21:13,613 INFO L138 Inliner]: procedures = 172, calls = 36, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 103 [2024-06-27 16:21:13,615 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 16:21:13,616 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 16:21:13,617 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 16:21:13,617 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 16:21:13,624 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:21:13" (1/1) ... [2024-06-27 16:21:13,625 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:21:13" (1/1) ... [2024-06-27 16:21:13,630 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:21:13" (1/1) ... [2024-06-27 16:21:13,655 INFO L175 MemorySlicer]: Split 16 memory accesses to 4 slices as follows [2, 5, 6, 3]. 38 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1, 0, 0]. The 5 writes are split as follows [0, 1, 2, 2]. [2024-06-27 16:21:13,668 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:21:13" (1/1) ... [2024-06-27 16:21:13,668 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:21:13" (1/1) ... [2024-06-27 16:21:13,672 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:21:13" (1/1) ... [2024-06-27 16:21:13,675 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:21:13" (1/1) ... [2024-06-27 16:21:13,676 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:21:13" (1/1) ... [2024-06-27 16:21:13,677 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:21:13" (1/1) ... [2024-06-27 16:21:13,679 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 16:21:13,680 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 16:21:13,680 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 16:21:13,680 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 16:21:13,680 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:21:13" (1/1) ... [2024-06-27 16:21:13,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:21:13,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:21:13,708 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 16:21:13,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 16:21:13,739 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 16:21:13,740 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 16:21:13,740 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-06-27 16:21:13,740 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-06-27 16:21:13,740 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-06-27 16:21:13,740 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-06-27 16:21:13,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 16:21:13,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 16:21:13,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-06-27 16:21:13,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-06-27 16:21:13,741 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 16:21:13,741 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 16:21:13,741 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-06-27 16:21:13,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-06-27 16:21:13,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 16:21:13,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 16:21:13,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-06-27 16:21:13,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-06-27 16:21:13,742 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 16:21:13,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 16:21:13,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 16:21:13,744 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 16:21:13,907 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 16:21:13,909 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 16:21:14,056 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 16:21:14,057 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 16:21:14,139 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 16:21:14,139 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-06-27 16:21:14,140 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:21:14 BoogieIcfgContainer [2024-06-27 16:21:14,140 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 16:21:14,141 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 16:21:14,141 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 16:21:14,144 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 16:21:14,144 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 04:21:13" (1/3) ... [2024-06-27 16:21:14,144 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e20556c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:21:14, skipping insertion in model container [2024-06-27 16:21:14,144 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:21:13" (2/3) ... [2024-06-27 16:21:14,145 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e20556c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:21:14, skipping insertion in model container [2024-06-27 16:21:14,145 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:21:14" (3/3) ... [2024-06-27 16:21:14,146 INFO L112 eAbstractionObserver]: Analyzing ICFG 36_stack_cas_p0_vs_concur.i [2024-06-27 16:21:14,152 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-06-27 16:21:14,159 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 16:21:14,160 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-06-27 16:21:14,160 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 16:21:14,190 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 16:21:14,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 22 places, 22 transitions, 48 flow [2024-06-27 16:21:14,260 INFO L124 PetriNetUnfolderBase]: 3/24 cut-off events. [2024-06-27 16:21:14,260 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 16:21:14,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 24 events. 3/24 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 26 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 19. Up to 2 conditions per place. [2024-06-27 16:21:14,262 INFO L82 GeneralOperation]: Start removeDead. Operand has 22 places, 22 transitions, 48 flow [2024-06-27 16:21:14,265 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 22 transitions, 48 flow [2024-06-27 16:21:14,277 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:21:14,285 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;@5c4c7480, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:21:14,285 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-06-27 16:21:14,293 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:21:14,293 INFO L124 PetriNetUnfolderBase]: 0/11 cut-off events. [2024-06-27 16:21:14,294 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 16:21:14,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:21:14,295 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-06-27 16:21:14,295 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-06-27 16:21:14,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:21:14,300 INFO L85 PathProgramCache]: Analyzing trace with hash 635281220, now seen corresponding path program 1 times [2024-06-27 16:21:14,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:21:14,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027660459] [2024-06-27 16:21:14,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:21:14,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:21:14,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:21:14,390 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-06-27 16:21:14,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:21:14,431 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-06-27 16:21:14,433 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-06-27 16:21:14,434 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-06-27 16:21:14,435 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-06-27 16:21:14,465 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2024-06-27 16:21:14,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 16:21:14,466 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2024-06-27 16:21:14,468 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-06-27 16:21:14,468 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-06-27 16:21:14,554 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 16:21:14,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 39 transitions, 88 flow [2024-06-27 16:21:14,576 INFO L124 PetriNetUnfolderBase]: 6/44 cut-off events. [2024-06-27 16:21:14,576 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 16:21:14,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 44 events. 6/44 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 84 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 35. Up to 3 conditions per place. [2024-06-27 16:21:14,578 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 39 transitions, 88 flow [2024-06-27 16:21:14,579 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 39 transitions, 88 flow [2024-06-27 16:21:14,580 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:21:14,581 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;@5c4c7480, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:21:14,582 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-27 16:21:14,587 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:21:14,588 INFO L124 PetriNetUnfolderBase]: 0/22 cut-off events. [2024-06-27 16:21:14,588 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 16:21:14,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:21:14,589 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-06-27 16:21:14,589 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-06-27 16:21:14,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:21:14,590 INFO L85 PathProgramCache]: Analyzing trace with hash -2056532500, now seen corresponding path program 1 times [2024-06-27 16:21:14,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:21:14,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777619565] [2024-06-27 16:21:14,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:21:14,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:21:14,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:21:14,621 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-06-27 16:21:14,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:21:14,645 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-06-27 16:21:14,647 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-06-27 16:21:14,647 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-06-27 16:21:14,647 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-06-27 16:21:14,648 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-06-27 16:21:14,648 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-06-27 16:21:14,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 16:21:14,648 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2024-06-27 16:21:14,649 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-06-27 16:21:14,649 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-06-27 16:21:14,683 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 16:21:14,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 56 transitions, 130 flow [2024-06-27 16:21:14,705 INFO L124 PetriNetUnfolderBase]: 9/64 cut-off events. [2024-06-27 16:21:14,705 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-06-27 16:21:14,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77 conditions, 64 events. 9/64 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 157 event pairs, 0 based on Foata normal form. 0/48 useless extension candidates. Maximal degree in co-relation 51. Up to 4 conditions per place. [2024-06-27 16:21:14,707 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 56 transitions, 130 flow [2024-06-27 16:21:14,708 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 56 transitions, 130 flow [2024-06-27 16:21:14,708 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:21:14,712 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;@5c4c7480, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:21:14,713 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-06-27 16:21:14,719 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:21:14,719 INFO L124 PetriNetUnfolderBase]: 1/30 cut-off events. [2024-06-27 16:21:14,720 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-06-27 16:21:14,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:21:14,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:21:14,721 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 16:21:14,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:21:14,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1392951488, now seen corresponding path program 1 times [2024-06-27 16:21:14,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:21:14,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049838579] [2024-06-27 16:21:14,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:21:14,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:21:14,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:21:14,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:21:14,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:21:14,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049838579] [2024-06-27 16:21:14,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049838579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:21:14,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:21:14,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 16:21:14,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676836455] [2024-06-27 16:21:14,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:21:14,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-06-27 16:21:14,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:21:14,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-06-27 16:21:14,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-06-27 16:21:14,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 56 [2024-06-27 16:21:14,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 56 transitions, 130 flow. Second operand has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:21:14,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:21:14,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 56 [2024-06-27 16:21:14,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:21:16,721 INFO L124 PetriNetUnfolderBase]: 16061/21909 cut-off events. [2024-06-27 16:21:16,722 INFO L125 PetriNetUnfolderBase]: For 944/944 co-relation queries the response was YES. [2024-06-27 16:21:16,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44230 conditions, 21909 events. 16061/21909 cut-off events. For 944/944 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 110209 event pairs, 13319 based on Foata normal form. 1369/20470 useless extension candidates. Maximal degree in co-relation 25175. Up to 21703 conditions per place. [2024-06-27 16:21:16,862 INFO L140 encePairwiseOnDemand]: 49/56 looper letters, 42 selfloop transitions, 0 changer transitions 0/49 dead transitions. [2024-06-27 16:21:16,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 49 transitions, 200 flow [2024-06-27 16:21:16,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-06-27 16:21:16,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-06-27 16:21:16,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 63 transitions. [2024-06-27 16:21:16,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-27 16:21:16,877 INFO L175 Difference]: Start difference. First operand has 54 places, 56 transitions, 130 flow. Second operand 2 states and 63 transitions. [2024-06-27 16:21:16,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 49 transitions, 200 flow [2024-06-27 16:21:16,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 49 transitions, 198 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-27 16:21:16,884 INFO L231 Difference]: Finished difference. Result has 51 places, 49 transitions, 114 flow [2024-06-27 16:21:16,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=114, PETRI_PLACES=51, PETRI_TRANSITIONS=49} [2024-06-27 16:21:16,889 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -3 predicate places. [2024-06-27 16:21:16,889 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 49 transitions, 114 flow [2024-06-27 16:21:16,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:21:16,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:21:16,889 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2024-06-27 16:21:16,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 16:21:16,890 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 16:21:16,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:21:16,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1113417405, now seen corresponding path program 1 times [2024-06-27 16:21:16,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:21:16,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511036442] [2024-06-27 16:21:16,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:21:16,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:21:16,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:21:16,922 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-06-27 16:21:16,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:21:16,945 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-06-27 16:21:16,945 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-06-27 16:21:16,945 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-06-27 16:21:16,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-06-27 16:21:16,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-06-27 16:21:16,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-06-27 16:21:16,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-06-27 16:21:16,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 16:21:16,946 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2024-06-27 16:21:16,947 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-06-27 16:21:16,947 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-06-27 16:21:16,994 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 16:21:16,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 73 transitions, 174 flow [2024-06-27 16:21:17,006 INFO L124 PetriNetUnfolderBase]: 12/84 cut-off events. [2024-06-27 16:21:17,006 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-06-27 16:21:17,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103 conditions, 84 events. 12/84 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 230 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 76. Up to 5 conditions per place. [2024-06-27 16:21:17,007 INFO L82 GeneralOperation]: Start removeDead. Operand has 70 places, 73 transitions, 174 flow [2024-06-27 16:21:17,008 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 73 transitions, 174 flow [2024-06-27 16:21:17,009 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:21:17,013 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;@5c4c7480, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:21:17,013 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 16:21:17,016 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:21:17,017 INFO L124 PetriNetUnfolderBase]: 1/30 cut-off events. [2024-06-27 16:21:17,017 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-06-27 16:21:17,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:21:17,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:21:17,017 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-06-27 16:21:17,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:21:17,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1639851616, now seen corresponding path program 1 times [2024-06-27 16:21:17,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:21:17,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35586321] [2024-06-27 16:21:17,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:21:17,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:21:17,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:21:17,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:21:17,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:21:17,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35586321] [2024-06-27 16:21:17,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35586321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:21:17,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:21:17,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 16:21:17,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458546775] [2024-06-27 16:21:17,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:21:17,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-06-27 16:21:17,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:21:17,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-06-27 16:21:17,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-06-27 16:21:17,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 73 [2024-06-27 16:21:17,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 73 transitions, 174 flow. Second operand has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:21:17,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:21:17,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 73 [2024-06-27 16:21:17,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:21:40,564 INFO L124 PetriNetUnfolderBase]: 266341/336197 cut-off events. [2024-06-27 16:21:40,565 INFO L125 PetriNetUnfolderBase]: For 18924/18924 co-relation queries the response was YES. [2024-06-27 16:21:41,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 679577 conditions, 336197 events. 266341/336197 cut-off events. For 18924/18924 co-relation queries the response was YES. Maximal size of possible extension queue 4979. Compared 1898434 event pairs, 222127 based on Foata normal form. 22081/313336 useless extension candidates. Maximal degree in co-relation 195411. Up to 334121 conditions per place. [2024-06-27 16:21:42,810 INFO L140 encePairwiseOnDemand]: 64/73 looper letters, 55 selfloop transitions, 0 changer transitions 0/64 dead transitions. [2024-06-27 16:21:42,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 64 transitions, 266 flow [2024-06-27 16:21:42,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-06-27 16:21:42,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-06-27 16:21:42,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 82 transitions. [2024-06-27 16:21:42,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5616438356164384 [2024-06-27 16:21:42,813 INFO L175 Difference]: Start difference. First operand has 70 places, 73 transitions, 174 flow. Second operand 2 states and 82 transitions. [2024-06-27 16:21:42,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 64 transitions, 266 flow [2024-06-27 16:21:42,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 64 transitions, 260 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-27 16:21:42,837 INFO L231 Difference]: Finished difference. Result has 66 places, 64 transitions, 150 flow [2024-06-27 16:21:42,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=150, PETRI_PLACES=66, PETRI_TRANSITIONS=64} [2024-06-27 16:21:42,838 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -4 predicate places. [2024-06-27 16:21:42,839 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 64 transitions, 150 flow [2024-06-27 16:21:42,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:21:42,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:21:42,839 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2024-06-27 16:21:42,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 16:21:42,840 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-06-27 16:21:42,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:21:42,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1612278444, now seen corresponding path program 1 times [2024-06-27 16:21:42,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:21:42,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355642570] [2024-06-27 16:21:42,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:21:42,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms