./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/35_double_lock_p3_vs.i --full-output --architecture 32bit


--------------------------------------------------------------------------------


Checking for ERROR reachability
Using default analysis
Version dfe144c0
Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/config/GemCutterReach.xml -i ../../../trunk/examples/svcomp/pthread-ext/35_double_lock_p3_vs.i -s /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/config/svcomp-Reach-32bit-GemCutter_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UGemCutter-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 GemCutter --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6710ae2bfe9a41273181e1b4b9dbdfa98f0dea6daffb771915892955eccb69dd
--- Real Ultimate output ---
This is Ultimate 0.2.4-tmp.fs.goblint-validation-dfe144c-m
[2024-07-20 18:31:15,197 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2024-07-20 18:31:15,273 INFO  L114        SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/config/svcomp-Reach-32bit-GemCutter_Default.epf
[2024-07-20 18:31:15,278 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2024-07-20 18:31:15,278 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2024-07-20 18:31:15,314 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2024-07-20 18:31:15,315 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2024-07-20 18:31:15,315 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2024-07-20 18:31:15,316 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2024-07-20 18:31:15,319 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2024-07-20 18:31:15,319 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2024-07-20 18:31:15,320 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2024-07-20 18:31:15,320 INFO  L153        SettingsManager]:  * Use SBE=true
[2024-07-20 18:31:15,321 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2024-07-20 18:31:15,322 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2024-07-20 18:31:15,322 INFO  L153        SettingsManager]:  * sizeof long=4
[2024-07-20 18:31:15,322 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2024-07-20 18:31:15,322 INFO  L153        SettingsManager]:  * sizeof POINTER=4
[2024-07-20 18:31:15,323 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2024-07-20 18:31:15,323 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2024-07-20 18:31:15,323 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2024-07-20 18:31:15,323 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2024-07-20 18:31:15,323 INFO  L153        SettingsManager]:  * Allow undefined functions=false
[2024-07-20 18:31:15,324 INFO  L153        SettingsManager]:  * sizeof long double=12
[2024-07-20 18:31:15,324 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2024-07-20 18:31:15,324 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2024-07-20 18:31:15,325 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2024-07-20 18:31:15,325 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2024-07-20 18:31:15,325 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2024-07-20 18:31:15,325 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2024-07-20 18:31:15,326 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2024-07-20 18:31:15,326 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2024-07-20 18:31:15,326 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2024-07-20 18:31:15,327 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2024-07-20 18:31:15,327 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2024-07-20 18:31:15,327 INFO  L153        SettingsManager]:  * DFS Order used in POR=LOOP_LOCKSTEP
[2024-07-20 18:31:15,327 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2024-07-20 18:31:15,327 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2024-07-20 18:31:15,327 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA
[2024-07-20 18:31:15,328 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2024-07-20 18:31:15,328 INFO  L153        SettingsManager]:  * CEGAR restart behaviour=ONE_CEGAR_PER_THREAD_INSTANCE
[2024-07-20 18:31:15,328 INFO  L153        SettingsManager]:  * Partial Order Reduction in concurrent analysis=PERSISTENT_SLEEP_NEW_STATES_FIXEDORDER
[2024-07-20 18:31:15,328 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
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/UGemCutter-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/UGemCutter-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 -> GemCutter
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 -> 6710ae2bfe9a41273181e1b4b9dbdfa98f0dea6daffb771915892955eccb69dd
[2024-07-20 18:31:15,555 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2024-07-20 18:31:15,577 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2024-07-20 18:31:15,579 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2024-07-20 18:31:15,580 INFO  L270        PluginConnector]: Initializing CDTParser...
[2024-07-20 18:31:15,581 INFO  L274        PluginConnector]: CDTParser initialized
[2024-07-20 18:31:15,581 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/../../../trunk/examples/svcomp/pthread-ext/35_double_lock_p3_vs.i
[2024-07-20 18:31:16,648 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2024-07-20 18:31:16,814 INFO  L384              CDTParser]: Found 1 translation units.
[2024-07-20 18:31:16,815 INFO  L180              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/35_double_lock_p3_vs.i
[2024-07-20 18:31:16,825 INFO  L427              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/data/304c509c1/3df9cb90016c442d8762d71f0f98861e/FLAG1912970b3
[2024-07-20 18:31:16,836 INFO  L435              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/data/304c509c1/3df9cb90016c442d8762d71f0f98861e
[2024-07-20 18:31:16,839 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2024-07-20 18:31:16,840 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2024-07-20 18:31:16,844 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2024-07-20 18:31:16,844 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2024-07-20 18:31:16,848 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2024-07-20 18:31:16,849 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:31:16" (1/1) ...
[2024-07-20 18:31:16,849 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2294406a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:31:16, skipping insertion in model container
[2024-07-20 18:31:16,849 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:31:16" (1/1) ...
[2024-07-20 18:31:16,887 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2024-07-20 18:31:17,150 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/35_double_lock_p3_vs.i[30553,30566]
[2024-07-20 18:31:17,157 INFO  L207          PostProcessor]: Analyzing one entry point: main
[2024-07-20 18:31:17,171 INFO  L202         MainTranslator]: Completed pre-run
[2024-07-20 18:31:17,197 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/35_double_lock_p3_vs.i[30553,30566]
[2024-07-20 18:31:17,199 INFO  L207          PostProcessor]: Analyzing one entry point: main
[2024-07-20 18:31:17,227 INFO  L206         MainTranslator]: Completed translation
[2024-07-20 18:31:17,227 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:31:17 WrapperNode
[2024-07-20 18:31:17,227 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2024-07-20 18:31:17,228 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2024-07-20 18:31:17,228 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2024-07-20 18:31:17,228 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2024-07-20 18:31:17,233 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:31:17" (1/1) ...
[2024-07-20 18:31:17,244 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:31:17" (1/1) ...
[2024-07-20 18:31:17,260 INFO  L138                Inliner]: procedures = 171, calls = 23, calls flagged for inlining = 11, calls inlined = 15, statements flattened = 123
[2024-07-20 18:31:17,260 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2024-07-20 18:31:17,261 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2024-07-20 18:31:17,261 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2024-07-20 18:31:17,261 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2024-07-20 18:31:17,267 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:31:17" (1/1) ...
[2024-07-20 18:31:17,267 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:31:17" (1/1) ...
[2024-07-20 18:31:17,269 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:31:17" (1/1) ...
[2024-07-20 18:31:17,270 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:31:17" (1/1) ...
[2024-07-20 18:31:17,274 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:31:17" (1/1) ...
[2024-07-20 18:31:17,277 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:31:17" (1/1) ...
[2024-07-20 18:31:17,278 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:31:17" (1/1) ...
[2024-07-20 18:31:17,279 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:31:17" (1/1) ...
[2024-07-20 18:31:17,281 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2024-07-20 18:31:17,281 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2024-07-20 18:31:17,282 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2024-07-20 18:31:17,282 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2024-07-20 18:31:17,282 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:31:17" (1/1) ...
[2024-07-20 18:31:17,287 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2024-07-20 18:31:17,297 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3
[2024-07-20 18:31:17,441 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2024-07-20 18:31:17,444 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2024-07-20 18:31:17,475 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2024-07-20 18:31:17,476 INFO  L130     BoogieDeclarations]: Found specification of procedure thr2
[2024-07-20 18:31:17,476 INFO  L138     BoogieDeclarations]: Found implementation of procedure thr2
[2024-07-20 18:31:17,476 INFO  L130     BoogieDeclarations]: Found specification of procedure thr1
[2024-07-20 18:31:17,476 INFO  L138     BoogieDeclarations]: Found implementation of procedure thr1
[2024-07-20 18:31:17,476 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2024-07-20 18:31:17,476 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2024-07-20 18:31:17,476 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2024-07-20 18:31:17,477 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2024-07-20 18:31:17,477 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2024-07-20 18:31:17,478 WARN  L214             CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement
[2024-07-20 18:31:17,572 INFO  L244             CfgBuilder]: Building ICFG
[2024-07-20 18:31:17,574 INFO  L270             CfgBuilder]: Building CFG for each procedure with an implementation
[2024-07-20 18:31:17,748 INFO  L289             CfgBuilder]: Ommited future-live optimization because the input is a concurrent program.
[2024-07-20 18:31:17,750 INFO  L293             CfgBuilder]: Performing block encoding
[2024-07-20 18:31:17,852 INFO  L315             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2024-07-20 18:31:17,855 INFO  L320             CfgBuilder]: Removed 2 assume(true) statements.
[2024-07-20 18:31:17,855 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:31:17 BoogieIcfgContainer
[2024-07-20 18:31:17,855 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2024-07-20 18:31:17,858 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2024-07-20 18:31:17,858 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2024-07-20 18:31:17,861 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2024-07-20 18:31:17,861 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 06:31:16" (1/3) ...
[2024-07-20 18:31:17,862 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fd9631f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:31:17, skipping insertion in model container
[2024-07-20 18:31:17,862 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:31:17" (2/3) ...
[2024-07-20 18:31:17,862 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fd9631f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:31:17, skipping insertion in model container
[2024-07-20 18:31:17,862 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:31:17" (3/3) ...
[2024-07-20 18:31:17,864 INFO  L112   eAbstractionObserver]: Analyzing ICFG 35_double_lock_p3_vs.i
[2024-07-20 18:31:17,870 WARN  L146   ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program
[2024-07-20 18:31:17,878 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2024-07-20 18:31:17,879 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2024-07-20 18:31:17,879 INFO  L522   ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances.
[2024-07-20 18:31:17,932 INFO  L144    ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions.
[2024-07-20 18:31:17,971 INFO  L100   denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2024-07-20 18:31:17,972 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000
[2024-07-20 18:31:17,972 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3
[2024-07-20 18:31:17,973 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null)
[2024-07-20 18:31:17,977 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (2)] Waiting until timeout for monitored process
[2024-07-20 18:31:18,015 INFO  L158   artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations.
[2024-07-20 18:31:18,024 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == thr1Thread1of1ForFork1 ========
[2024-07-20 18:31:18,029 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=PARTIAL_ORDER_FA, 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;@1e0e170b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2024-07-20 18:31:18,030 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2024-07-20 18:31:18,143 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-07-20 18:31:18,147 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2024-07-20 18:31:18,148 INFO  L85        PathProgramCache]: Analyzing trace with hash 700643664, now seen corresponding path program 1 times
[2024-07-20 18:31:18,154 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2024-07-20 18:31:18,154 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895219664]
[2024-07-20 18:31:18,154 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-07-20 18:31:18,155 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-07-20 18:31:18,281 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-07-20 18:31:18,405 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-07-20 18:31:18,406 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2024-07-20 18:31:18,406 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895219664]
[2024-07-20 18:31:18,407 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895219664] provided 1 perfect and 0 imperfect interpolant sequences
[2024-07-20 18:31:18,407 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2024-07-20 18:31:18,407 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2024-07-20 18:31:18,408 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739000620]
[2024-07-20 18:31:18,409 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2024-07-20 18:31:18,412 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2024-07-20 18:31:18,412 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2024-07-20 18:31:18,431 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2024-07-20 18:31:18,432 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2024-07-20 18:31:18,432 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2024-07-20 18:31:18,433 INFO  L495      AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states
[2024-07-20 18:31:18,434 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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)
[2024-07-20 18:31:18,434 INFO  L154   InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. 
[2024-07-20 18:31:18,659 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2024-07-20 18:31:18,662 INFO  L805   garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining)
[2024-07-20 18:31:18,662 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2024-07-20 18:31:18,667 INFO  L445         BasicCegarLoop]: Path program histogram: [1]
[2024-07-20 18:31:18,669 INFO  L308   ceAbstractionStarter]: Result for error location thr1Thread1of1ForFork1 was SAFE (1/2)
[2024-07-20 18:31:18,671 INFO  L100   denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2024-07-20 18:31:18,671 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000
[2024-07-20 18:31:18,671 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3
[2024-07-20 18:31:18,709 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null)
[2024-07-20 18:31:18,712 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (3)] Waiting until timeout for monitored process
[2024-07-20 18:31:18,713 INFO  L158   artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations.
[2024-07-20 18:31:18,713 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ========
[2024-07-20 18:31:18,716 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=PARTIAL_ORDER_FA, 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;@1e0e170b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2024-07-20 18:31:18,716 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 2 error locations.
[2024-07-20 18:31:18,775 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] ===
[2024-07-20 18:31:18,776 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2024-07-20 18:31:18,776 INFO  L85        PathProgramCache]: Analyzing trace with hash -123699847, now seen corresponding path program 1 times
[2024-07-20 18:31:18,776 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2024-07-20 18:31:18,776 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559756853]
[2024-07-20 18:31:18,776 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-07-20 18:31:18,777 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-07-20 18:31:18,808 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-07-20 18:31:18,863 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2024-07-20 18:31:18,863 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2024-07-20 18:31:18,864 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559756853]
[2024-07-20 18:31:18,864 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559756853] provided 1 perfect and 0 imperfect interpolant sequences
[2024-07-20 18:31:18,864 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2024-07-20 18:31:18,864 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2024-07-20 18:31:18,864 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840167886]
[2024-07-20 18:31:18,864 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2024-07-20 18:31:18,865 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2024-07-20 18:31:18,865 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2024-07-20 18:31:18,865 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2024-07-20 18:31:18,866 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2024-07-20 18:31:18,866 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2024-07-20 18:31:18,866 INFO  L495      AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states
[2024-07-20 18:31:18,866 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 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)
[2024-07-20 18:31:18,866 INFO  L154   InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. 
[2024-07-20 18:31:18,903 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2024-07-20 18:31:18,904 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2024-07-20 18:31:18,904 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] ===
[2024-07-20 18:31:18,904 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2024-07-20 18:31:18,904 INFO  L85        PathProgramCache]: Analyzing trace with hash -1921234145, now seen corresponding path program 1 times
[2024-07-20 18:31:18,904 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2024-07-20 18:31:18,905 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498178592]
[2024-07-20 18:31:18,905 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-07-20 18:31:18,905 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-07-20 18:31:18,945 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2024-07-20 18:31:18,945 INFO  L356             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2024-07-20 18:31:18,968 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2024-07-20 18:31:18,993 INFO  L130   FreeRefinementEngine]: Strategy CAMEL found a feasible trace
[2024-07-20 18:31:18,994 INFO  L360         BasicCegarLoop]: Counterexample is feasible
[2024-07-20 18:31:18,994 INFO  L805   garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining)
[2024-07-20 18:31:18,994 INFO  L805   garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining)
[2024-07-20 18:31:18,994 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2024-07-20 18:31:19,003 INFO  L445         BasicCegarLoop]: Path program histogram: [1, 1]
[2024-07-20 18:31:19,004 INFO  L308   ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE,UNKNOWN (2/2)
[2024-07-20 18:31:19,004 WARN  L234   ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis
[2024-07-20 18:31:19,004 INFO  L522   ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances.
[2024-07-20 18:31:19,026 INFO  L144    ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions.
[2024-07-20 18:31:19,029 INFO  L100   denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2024-07-20 18:31:19,029 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000
[2024-07-20 18:31:19,029 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3
[2024-07-20 18:31:19,030 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null)
[2024-07-20 18:31:19,032 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (4)] Waiting until timeout for monitored process
[2024-07-20 18:31:19,033 INFO  L158   artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations.
[2024-07-20 18:31:19,034 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ========
[2024-07-20 18:31:19,035 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=PARTIAL_ORDER_FA, 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;@1e0e170b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2024-07-20 18:31:19,035 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 2 error locations.
[2024-07-20 18:31:19,118 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] ===
[2024-07-20 18:31:19,119 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2024-07-20 18:31:19,119 INFO  L85        PathProgramCache]: Analyzing trace with hash -380553838, now seen corresponding path program 1 times
[2024-07-20 18:31:19,119 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2024-07-20 18:31:19,119 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689683738]
[2024-07-20 18:31:19,119 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-07-20 18:31:19,119 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-07-20 18:31:19,143 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-07-20 18:31:19,187 INFO  L134       CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked.
[2024-07-20 18:31:19,188 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2024-07-20 18:31:19,188 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689683738]
[2024-07-20 18:31:19,188 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689683738] provided 1 perfect and 0 imperfect interpolant sequences
[2024-07-20 18:31:19,188 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2024-07-20 18:31:19,188 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2024-07-20 18:31:19,189 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307734612]
[2024-07-20 18:31:19,189 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2024-07-20 18:31:19,189 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2024-07-20 18:31:19,189 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2024-07-20 18:31:19,190 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2024-07-20 18:31:19,190 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2024-07-20 18:31:19,190 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2024-07-20 18:31:19,190 INFO  L495      AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states
[2024-07-20 18:31:19,190 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 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)
[2024-07-20 18:31:19,190 INFO  L154   InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. 
[2024-07-20 18:31:19,269 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2024-07-20 18:31:19,269 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2024-07-20 18:31:19,269 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] ===
[2024-07-20 18:31:19,269 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2024-07-20 18:31:19,269 INFO  L85        PathProgramCache]: Analyzing trace with hash -235371075, now seen corresponding path program 1 times
[2024-07-20 18:31:19,270 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2024-07-20 18:31:19,270 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78680704]
[2024-07-20 18:31:19,270 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-07-20 18:31:19,270 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-07-20 18:31:19,298 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2024-07-20 18:31:19,298 INFO  L356             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2024-07-20 18:31:19,328 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2024-07-20 18:31:19,341 INFO  L130   FreeRefinementEngine]: Strategy CAMEL found a feasible trace
[2024-07-20 18:31:19,342 INFO  L360         BasicCegarLoop]: Counterexample is feasible
[2024-07-20 18:31:19,342 INFO  L805   garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining)
[2024-07-20 18:31:19,342 INFO  L805   garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining)
[2024-07-20 18:31:19,342 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2024-07-20 18:31:19,343 INFO  L445         BasicCegarLoop]: Path program histogram: [1, 1]
[2024-07-20 18:31:19,343 INFO  L308   ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE,UNKNOWN (1/3)
[2024-07-20 18:31:19,343 WARN  L234   ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis
[2024-07-20 18:31:19,343 INFO  L522   ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances.
[2024-07-20 18:31:19,377 INFO  L144    ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions.
[2024-07-20 18:31:19,380 INFO  L100   denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2024-07-20 18:31:19,381 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000
[2024-07-20 18:31:19,381 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3
[2024-07-20 18:31:19,382 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null)
[2024-07-20 18:31:19,383 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (5)] Waiting until timeout for monitored process
[2024-07-20 18:31:19,385 INFO  L158   artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations.
[2024-07-20 18:31:19,385 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == thr1Thread3of3ForFork1 ========
[2024-07-20 18:31:19,386 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=PARTIAL_ORDER_FA, 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;@1e0e170b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2024-07-20 18:31:19,386 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2024-07-20 18:31:19,386 INFO  L805   garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining)
[2024-07-20 18:31:19,387 INFO  L445         BasicCegarLoop]: Path program histogram: []
[2024-07-20 18:31:19,387 INFO  L308   ceAbstractionStarter]: Result for error location thr1Thread3of3ForFork1 was SAFE (1/4)
[2024-07-20 18:31:19,389 INFO  L100   denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2024-07-20 18:31:19,389 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000
[2024-07-20 18:31:19,389 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3
[2024-07-20 18:31:19,403 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null)
[2024-07-20 18:31:19,404 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (6)] Waiting until timeout for monitored process
[2024-07-20 18:31:19,406 INFO  L158   artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations.
[2024-07-20 18:31:19,406 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ========
[2024-07-20 18:31:19,407 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=PARTIAL_ORDER_FA, 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;@1e0e170b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2024-07-20 18:31:19,407 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 2 error locations.
[2024-07-20 18:31:19,505 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] ===
[2024-07-20 18:31:19,505 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2024-07-20 18:31:19,506 INFO  L85        PathProgramCache]: Analyzing trace with hash -393244192, now seen corresponding path program 1 times
[2024-07-20 18:31:19,506 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2024-07-20 18:31:19,506 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419716158]
[2024-07-20 18:31:19,506 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-07-20 18:31:19,506 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-07-20 18:31:19,516 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-07-20 18:31:19,556 INFO  L134       CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked.
[2024-07-20 18:31:19,557 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2024-07-20 18:31:19,557 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419716158]
[2024-07-20 18:31:19,557 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419716158] provided 1 perfect and 0 imperfect interpolant sequences
[2024-07-20 18:31:19,557 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2024-07-20 18:31:19,557 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2024-07-20 18:31:19,557 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947898053]
[2024-07-20 18:31:19,557 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2024-07-20 18:31:19,558 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2024-07-20 18:31:19,558 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2024-07-20 18:31:19,558 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2024-07-20 18:31:19,558 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2024-07-20 18:31:19,558 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2024-07-20 18:31:19,558 INFO  L495      AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states
[2024-07-20 18:31:19,558 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 7.666666666666667) 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)
[2024-07-20 18:31:19,559 INFO  L154   InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. 
[2024-07-20 18:31:19,625 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2024-07-20 18:31:19,625 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2024-07-20 18:31:19,626 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] ===
[2024-07-20 18:31:19,626 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2024-07-20 18:31:19,626 INFO  L85        PathProgramCache]: Analyzing trace with hash -1201645424, now seen corresponding path program 1 times
[2024-07-20 18:31:19,626 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2024-07-20 18:31:19,626 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392145058]
[2024-07-20 18:31:19,626 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-07-20 18:31:19,626 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-07-20 18:31:19,658 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2024-07-20 18:31:19,659 INFO  L356             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2024-07-20 18:31:19,672 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2024-07-20 18:31:19,687 INFO  L130   FreeRefinementEngine]: Strategy CAMEL found a feasible trace
[2024-07-20 18:31:19,688 INFO  L360         BasicCegarLoop]: Counterexample is feasible
[2024-07-20 18:31:19,688 INFO  L805   garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining)
[2024-07-20 18:31:19,688 INFO  L805   garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining)
[2024-07-20 18:31:19,688 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2024-07-20 18:31:19,689 INFO  L445         BasicCegarLoop]: Path program histogram: [1, 1]
[2024-07-20 18:31:19,690 INFO  L308   ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE,UNKNOWN (2/4)
[2024-07-20 18:31:19,690 WARN  L234   ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis
[2024-07-20 18:31:19,690 INFO  L522   ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances.
[2024-07-20 18:31:19,728 INFO  L144    ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions.
[2024-07-20 18:31:19,731 INFO  L100   denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2024-07-20 18:31:19,731 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000
[2024-07-20 18:31:19,731 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3
[2024-07-20 18:31:19,732 INFO  L229       MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null)
[2024-07-20 18:31:19,737 INFO  L158   artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations.
[2024-07-20 18:31:19,737 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == thr1Thread3of4ForFork1 ========
[2024-07-20 18:31:19,738 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=PARTIAL_ORDER_FA, 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;@1e0e170b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2024-07-20 18:31:19,738 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2024-07-20 18:31:19,738 INFO  L805   garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining)
[2024-07-20 18:31:19,739 INFO  L445         BasicCegarLoop]: Path program histogram: []
[2024-07-20 18:31:19,739 INFO  L308   ceAbstractionStarter]: Result for error location thr1Thread3of4ForFork1 was SAFE (1/5)
[2024-07-20 18:31:19,740 INFO  L100   denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2024-07-20 18:31:19,741 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000
[2024-07-20 18:31:19,741 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3
[2024-07-20 18:31:19,741 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (7)] Waiting until timeout for monitored process
[2024-07-20 18:31:19,742 INFO  L229       MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null)
[2024-07-20 18:31:19,751 INFO  L158   artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations.
[2024-07-20 18:31:19,751 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == thr1Thread4of4ForFork1 ========
[2024-07-20 18:31:19,751 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=PARTIAL_ORDER_FA, 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;@1e0e170b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2024-07-20 18:31:19,751 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2024-07-20 18:31:19,752 INFO  L805   garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining)
[2024-07-20 18:31:19,753 INFO  L445         BasicCegarLoop]: Path program histogram: []
[2024-07-20 18:31:19,753 INFO  L308   ceAbstractionStarter]: Result for error location thr1Thread4of4ForFork1 was SAFE (2/5)
[2024-07-20 18:31:19,758 INFO  L100   denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2024-07-20 18:31:19,758 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000
[2024-07-20 18:31:19,758 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3
[2024-07-20 18:31:19,758 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (8)] Waiting until timeout for monitored process
[2024-07-20 18:31:19,760 INFO  L229       MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null)
[2024-07-20 18:31:19,765 INFO  L158   artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations.
[2024-07-20 18:31:19,765 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == thr1Thread2of4ForFork1 ========
[2024-07-20 18:31:19,766 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=PARTIAL_ORDER_FA, 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;@1e0e170b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2024-07-20 18:31:19,766 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2024-07-20 18:31:19,766 INFO  L805   garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining)
[2024-07-20 18:31:19,767 INFO  L445         BasicCegarLoop]: Path program histogram: []
[2024-07-20 18:31:19,767 INFO  L308   ceAbstractionStarter]: Result for error location thr1Thread2of4ForFork1 was SAFE (3/5)
[2024-07-20 18:31:19,768 INFO  L100   denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2024-07-20 18:31:19,768 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000
[2024-07-20 18:31:19,768 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3
[2024-07-20 18:31:19,771 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (9)] Waiting until timeout for monitored process
[2024-07-20 18:31:19,776 INFO  L229       MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null)
[2024-07-20 18:31:19,783 INFO  L158   artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations.
[2024-07-20 18:31:19,783 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == thr1Thread1of4ForFork1 ========
[2024-07-20 18:31:19,783 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=PARTIAL_ORDER_FA, 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;@1e0e170b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2024-07-20 18:31:19,783 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2024-07-20 18:31:19,801 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (10)] Waiting until timeout for monitored process
[2024-07-20 18:31:19,879 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-07-20 18:31:19,880 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2024-07-20 18:31:19,880 INFO  L85        PathProgramCache]: Analyzing trace with hash 900390931, now seen corresponding path program 1 times
[2024-07-20 18:31:19,880 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2024-07-20 18:31:19,880 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731309710]
[2024-07-20 18:31:19,880 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-07-20 18:31:19,880 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-07-20 18:31:19,908 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-07-20 18:31:19,925 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-07-20 18:31:19,925 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2024-07-20 18:31:19,925 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731309710]
[2024-07-20 18:31:19,925 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731309710] provided 1 perfect and 0 imperfect interpolant sequences
[2024-07-20 18:31:19,925 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2024-07-20 18:31:19,925 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2024-07-20 18:31:19,925 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128104643]
[2024-07-20 18:31:19,925 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2024-07-20 18:31:19,925 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2024-07-20 18:31:19,925 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2024-07-20 18:31:19,926 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2024-07-20 18:31:19,926 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2024-07-20 18:31:19,926 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2024-07-20 18:31:19,926 INFO  L495      AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states
[2024-07-20 18:31:19,926 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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)
[2024-07-20 18:31:19,926 INFO  L154   InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states.