./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-deagle/circular_buffer_ok.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 01849734 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/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_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/config/GemCutterReach.xml -i ../sv-benchmarks/c/pthread-deagle/circular_buffer_ok.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 8fcb457b1bed8494a9a3b58e82500f367f4337ac38b5a41a5dad0da896f97e40 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-0184973-m [2025-04-24 17:57:05,698 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-24 17:57:05,768 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/config/svcomp-Reach-32bit-GemCutter_Default.epf [2025-04-24 17:57:05,771 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-24 17:57:05,771 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-24 17:57:05,785 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-24 17:57:05,786 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-24 17:57:05,786 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-24 17:57:05,786 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-24 17:57:05,786 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-24 17:57:05,786 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-24 17:57:05,786 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-24 17:57:05,787 INFO L153 SettingsManager]: * Use SBE=true [2025-04-24 17:57:05,787 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-24 17:57:05,787 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-24 17:57:05,787 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-24 17:57:05,787 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-24 17:57:05,787 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-24 17:57:05,787 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-24 17:57:05,787 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-24 17:57:05,787 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-24 17:57:05,787 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-24 17:57:05,787 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-24 17:57:05,787 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-24 17:57:05,787 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-24 17:57:05,787 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-24 17:57:05,788 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-24 17:57:05,788 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-24 17:57:05,788 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-24 17:57:05,788 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-24 17:57:05,788 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-24 17:57:05,788 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-24 17:57:05,788 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-24 17:57:05,788 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-24 17:57:05,788 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-24 17:57:05,788 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-24 17:57:05,788 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-24 17:57:05,789 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-24 17:57:05,789 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-24 17:57:05,789 INFO L153 SettingsManager]: * Commutativity condition synthesis=NECESSARY_AND_SUFFICIENT [2025-04-24 17:57:05,789 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-24 17:57:05,789 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-24 17:57:05,789 INFO L153 SettingsManager]: * DFS Order used in POR=LOOP_LOCKSTEP [2025-04-24 17:57:05,789 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-24 17:57:05,789 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2025-04-24 17:57:05,789 INFO L153 SettingsManager]: * CEGAR restart behaviour=ONE_CEGAR_PER_THREAD_INSTANCE [2025-04-24 17:57:05,789 INFO L153 SettingsManager]: * Partial Order Reduction in concurrent analysis=PERSISTENT_SLEEP_NEW_STATES_FIXEDORDER [2025-04-24 17:57:05,789 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> 8fcb457b1bed8494a9a3b58e82500f367f4337ac38b5a41a5dad0da896f97e40 [2025-04-24 17:57:06,030 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-24 17:57:06,037 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-24 17:57:06,039 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-24 17:57:06,039 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-24 17:57:06,040 INFO L274 PluginConnector]: CDTParser initialized [2025-04-24 17:57:06,041 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/../sv-benchmarks/c/pthread-deagle/circular_buffer_ok.i [2025-04-24 17:57:07,316 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/data/06c17a5e1/fd31d09e6fbb4353b5b8aa96fe7a045c/FLAGadb663cc2 [2025-04-24 17:57:07,531 INFO L389 CDTParser]: Found 1 translation units. [2025-04-24 17:57:07,536 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-deagle/circular_buffer_ok.i [2025-04-24 17:57:07,547 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/data/06c17a5e1/fd31d09e6fbb4353b5b8aa96fe7a045c/FLAGadb663cc2 [2025-04-24 17:57:09,417 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/data/06c17a5e1/fd31d09e6fbb4353b5b8aa96fe7a045c [2025-04-24 17:57:09,419 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-24 17:57:09,420 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-04-24 17:57:09,420 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-24 17:57:09,421 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-24 17:57:09,423 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-24 17:57:09,424 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.04 05:57:09" (1/1) ... [2025-04-24 17:57:09,424 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c6a6280 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.04 05:57:09, skipping insertion in model container [2025-04-24 17:57:09,424 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.04 05:57:09" (1/1) ... [2025-04-24 17:57:09,446 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-24 17:57:09,648 WARN L116 LibraryModelHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-deagle/circular_buffer_ok.i[30451,30464] [2025-04-24 17:57:09,654 WARN L116 LibraryModelHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-deagle/circular_buffer_ok.i[30681,30694] [2025-04-24 17:57:09,660 WARN L116 LibraryModelHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-deagle/circular_buffer_ok.i[30979,30992] [2025-04-24 17:57:09,664 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-24 17:57:09,673 INFO L200 MainTranslator]: Completed pre-run [2025-04-24 17:57:09,708 WARN L116 LibraryModelHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-deagle/circular_buffer_ok.i[30451,30464] [2025-04-24 17:57:09,709 WARN L116 LibraryModelHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-deagle/circular_buffer_ok.i[30681,30694] [2025-04-24 17:57:09,710 WARN L116 LibraryModelHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-deagle/circular_buffer_ok.i[30979,30992] [2025-04-24 17:57:09,713 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-24 17:57:09,750 INFO L204 MainTranslator]: Completed translation [2025-04-24 17:57:09,751 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.04 05:57:09 WrapperNode [2025-04-24 17:57:09,751 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-24 17:57:09,752 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-24 17:57:09,752 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-24 17:57:09,752 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-24 17:57:09,756 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.04 05:57:09" (1/1) ... [2025-04-24 17:57:09,775 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.04 05:57:09" (1/1) ... [2025-04-24 17:57:09,795 INFO L138 Inliner]: procedures = 168, calls = 38, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 139 [2025-04-24 17:57:09,798 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-24 17:57:09,798 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-24 17:57:09,798 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-24 17:57:09,798 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-24 17:57:09,803 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.04 05:57:09" (1/1) ... [2025-04-24 17:57:09,804 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.04 05:57:09" (1/1) ... [2025-04-24 17:57:09,807 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.04 05:57:09" (1/1) ... [2025-04-24 17:57:09,808 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.04 05:57:09" (1/1) ... [2025-04-24 17:57:09,815 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.04 05:57:09" (1/1) ... [2025-04-24 17:57:09,820 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.04 05:57:09" (1/1) ... [2025-04-24 17:57:09,822 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.04 05:57:09" (1/1) ... [2025-04-24 17:57:09,823 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.04 05:57:09" (1/1) ... [2025-04-24 17:57:09,827 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.04 05:57:09" (1/1) ... [2025-04-24 17:57:09,830 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-24 17:57:09,835 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-24 17:57:09,835 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-24 17:57:09,835 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-24 17:57:09,836 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.04 05:57:09" (1/1) ... [2025-04-24 17:57:09,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-24 17:57:09,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-24 17:57:09,865 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-04-24 17:57:09,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-04-24 17:57:09,882 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2025-04-24 17:57:09,882 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2025-04-24 17:57:09,882 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2025-04-24 17:57:09,882 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2025-04-24 17:57:09,882 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2025-04-24 17:57:09,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2025-04-24 17:57:09,882 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-04-24 17:57:09,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-24 17:57:09,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2025-04-24 17:57:09,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2025-04-24 17:57:09,882 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-04-24 17:57:09,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-24 17:57:09,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-24 17:57:09,883 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-04-24 17:57:09,979 INFO L234 CfgBuilder]: Building ICFG [2025-04-24 17:57:09,980 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-24 17:57:10,174 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-24 17:57:10,174 INFO L283 CfgBuilder]: Performing block encoding [2025-04-24 17:57:10,313 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-24 17:57:10,313 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-24 17:57:10,313 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.04 05:57:10 BoogieIcfgContainer [2025-04-24 17:57:10,315 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-24 17:57:10,316 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-24 17:57:10,317 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-24 17:57:10,320 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-24 17:57:10,320 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.04 05:57:09" (1/3) ... [2025-04-24 17:57:10,322 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70c2b00f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.04 05:57:10, skipping insertion in model container [2025-04-24 17:57:10,323 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.04 05:57:09" (2/3) ... [2025-04-24 17:57:10,323 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70c2b00f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.04 05:57:10, skipping insertion in model container [2025-04-24 17:57:10,323 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.04 05:57:10" (3/3) ... [2025-04-24 17:57:10,324 INFO L128 eAbstractionObserver]: Analyzing ICFG circular_buffer_ok.i [2025-04-24 17:57:10,334 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-24 17:57:10,336 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG circular_buffer_ok.i that has 3 procedures, 39 locations, 44 edges, 1 initial locations, 2 loop locations, and 3 error locations. [2025-04-24 17:57:10,337 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-24 17:57:10,380 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-04-24 17:57:10,408 INFO L125 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-24 17:57:10,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2025-04-24 17:57:10,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-24 17:57:10,412 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) [2025-04-24 17:57:10,413 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 [2025-04-24 17:57:10,473 INFO L177 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2025-04-24 17:57:10,484 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == t1Thread1of1ForFork0 ======== [2025-04-24 17:57:10,488 INFO L340 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, 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;@67a8beb0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-24 17:57:10,488 INFO L341 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2025-04-24 17:57:10,612 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err1ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err1ASSERT_VIOLATIONERROR_FUNCTION] === [2025-04-24 17:57:10,612 INFO L305 artialOrderCegarLoop]: Trying commutativity condition synthesis. [2025-04-24 17:57:10,613 INFO L139 ounterexampleChecker]: Examining path program with hash 476171607, occurence #1 [2025-04-24 17:57:10,613 INFO L141 ounterexampleChecker]: Commutativity condition synthesis is only active after more than 2 occurrences. Skipping... [2025-04-24 17:57:10,613 INFO L316 artialOrderCegarLoop]: No commutativity proof found, falling back to feasibility check. [2025-04-24 17:57:10,616 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-24 17:57:10,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1578472281, now seen corresponding path program 1 times [2025-04-24 17:57:10,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-24 17:57:10,621 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194700942] [2025-04-24 17:57:10,621 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-24 17:57:10,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-24 17:57:10,677 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-04-24 17:57:10,708 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-04-24 17:57:10,709 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-24 17:57:10,709 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-24 17:57:10,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-24 17:57:10,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-24 17:57:10,861 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194700942] [2025-04-24 17:57:10,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194700942] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-24 17:57:10,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-24 17:57:10,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-24 17:57:10,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354193976] [2025-04-24 17:57:10,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-24 17:57:10,865 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-24 17:57:10,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-24 17:57:10,876 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-24 17:57:10,877 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-24 17:57:10,877 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-04-24 17:57:10,878 INFO L485 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2025-04-24 17:57:10,878 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) [2025-04-24 17:57:10,878 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2025-04-24 17:57:10,993 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:10,994 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-24 17:57:10,994 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err1ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err1ASSERT_VIOLATIONERROR_FUNCTION] === [2025-04-24 17:57:10,994 INFO L305 artialOrderCegarLoop]: Trying commutativity condition synthesis. [2025-04-24 17:57:10,994 INFO L139 ounterexampleChecker]: Examining path program with hash -1823240843, occurence #1 [2025-04-24 17:57:10,994 INFO L141 ounterexampleChecker]: Commutativity condition synthesis is only active after more than 2 occurrences. Skipping... [2025-04-24 17:57:10,994 INFO L316 artialOrderCegarLoop]: No commutativity proof found, falling back to feasibility check. [2025-04-24 17:57:10,994 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-24 17:57:10,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1689638260, now seen corresponding path program 1 times [2025-04-24 17:57:10,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-24 17:57:10,995 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145928552] [2025-04-24 17:57:10,995 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-24 17:57:10,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-24 17:57:11,018 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 58 statements into 1 equivalence classes. [2025-04-24 17:57:11,037 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 58 of 58 statements. [2025-04-24 17:57:11,037 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-24 17:57:11,037 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-24 17:57:11,144 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-04-24 17:57:11,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-24 17:57:11,144 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145928552] [2025-04-24 17:57:11,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145928552] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-24 17:57:11,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-24 17:57:11,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-24 17:57:11,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847606745] [2025-04-24 17:57:11,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-24 17:57:11,146 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-24 17:57:11,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-24 17:57:11,146 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-24 17:57:11,146 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-24 17:57:11,146 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-04-24 17:57:11,146 INFO L485 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2025-04-24 17:57:11,147 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2025-04-24 17:57:11,147 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:11,147 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2025-04-24 17:57:11,221 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:11,222 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:11,222 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-04-24 17:57:11,222 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err1ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err1ASSERT_VIOLATIONERROR_FUNCTION] === [2025-04-24 17:57:11,222 INFO L305 artialOrderCegarLoop]: Trying commutativity condition synthesis. [2025-04-24 17:57:11,222 INFO L139 ounterexampleChecker]: Examining path program with hash -1308375312, occurence #1 [2025-04-24 17:57:11,222 INFO L141 ounterexampleChecker]: Commutativity condition synthesis is only active after more than 2 occurrences. Skipping... [2025-04-24 17:57:11,222 INFO L316 artialOrderCegarLoop]: No commutativity proof found, falling back to feasibility check. [2025-04-24 17:57:11,223 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-24 17:57:11,223 INFO L85 PathProgramCache]: Analyzing trace with hash 634199514, now seen corresponding path program 1 times [2025-04-24 17:57:11,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-24 17:57:11,223 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433570597] [2025-04-24 17:57:11,223 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-24 17:57:11,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-24 17:57:11,231 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-04-24 17:57:11,241 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-04-24 17:57:11,242 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-24 17:57:11,242 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-24 17:57:11,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-24 17:57:11,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-24 17:57:11,337 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433570597] [2025-04-24 17:57:11,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433570597] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-24 17:57:11,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-24 17:57:11,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-04-24 17:57:11,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516121849] [2025-04-24 17:57:11,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-24 17:57:11,337 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-24 17:57:11,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-24 17:57:11,338 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-24 17:57:11,338 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-04-24 17:57:11,338 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-04-24 17:57:11,338 INFO L485 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2025-04-24 17:57:11,338 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 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) [2025-04-24 17:57:11,338 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:11,338 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:11,338 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2025-04-24 17:57:11,432 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:11,432 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:11,433 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-24 17:57:11,433 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-04-24 17:57:11,433 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err1ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err1ASSERT_VIOLATIONERROR_FUNCTION] === [2025-04-24 17:57:11,433 INFO L305 artialOrderCegarLoop]: Trying commutativity condition synthesis. [2025-04-24 17:57:11,433 INFO L139 ounterexampleChecker]: Examining path program with hash -862630704, occurence #1 [2025-04-24 17:57:11,434 INFO L141 ounterexampleChecker]: Commutativity condition synthesis is only active after more than 2 occurrences. Skipping... [2025-04-24 17:57:11,434 INFO L316 artialOrderCegarLoop]: No commutativity proof found, falling back to feasibility check. [2025-04-24 17:57:11,434 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-24 17:57:11,434 INFO L85 PathProgramCache]: Analyzing trace with hash -280031664, now seen corresponding path program 1 times [2025-04-24 17:57:11,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-24 17:57:11,434 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280862339] [2025-04-24 17:57:11,434 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-24 17:57:11,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-24 17:57:11,440 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-04-24 17:57:11,449 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-04-24 17:57:11,450 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-24 17:57:11,450 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-24 17:57:11,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-24 17:57:11,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-24 17:57:11,552 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280862339] [2025-04-24 17:57:11,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280862339] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-24 17:57:11,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-24 17:57:11,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-04-24 17:57:11,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049863918] [2025-04-24 17:57:11,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-24 17:57:11,552 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-24 17:57:11,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-24 17:57:11,553 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-24 17:57:11,553 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-24 17:57:11,553 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-04-24 17:57:11,553 INFO L485 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2025-04-24 17:57:11,553 INFO L486 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) [2025-04-24 17:57:11,553 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:11,553 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:11,553 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 5 states. [2025-04-24 17:57:11,553 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2025-04-24 17:57:11,704 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:11,705 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:11,706 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-24 17:57:11,706 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:11,706 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-04-24 17:57:11,706 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err1ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err1ASSERT_VIOLATIONERROR_FUNCTION] === [2025-04-24 17:57:11,706 INFO L305 artialOrderCegarLoop]: Trying commutativity condition synthesis. [2025-04-24 17:57:11,706 INFO L139 ounterexampleChecker]: Examining path program with hash -573556660, occurence #1 [2025-04-24 17:57:11,706 INFO L141 ounterexampleChecker]: Commutativity condition synthesis is only active after more than 2 occurrences. Skipping... [2025-04-24 17:57:11,706 INFO L316 artialOrderCegarLoop]: No commutativity proof found, falling back to feasibility check. [2025-04-24 17:57:11,707 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-24 17:57:11,707 INFO L85 PathProgramCache]: Analyzing trace with hash -283915796, now seen corresponding path program 1 times [2025-04-24 17:57:11,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-24 17:57:11,707 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901959788] [2025-04-24 17:57:11,707 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-24 17:57:11,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-24 17:57:11,725 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 88 statements into 1 equivalence classes. [2025-04-24 17:57:11,738 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 88 of 88 statements. [2025-04-24 17:57:11,741 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-24 17:57:11,741 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-24 17:57:11,870 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-24 17:57:11,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-24 17:57:11,871 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901959788] [2025-04-24 17:57:11,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901959788] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-24 17:57:11,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-24 17:57:11,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-24 17:57:11,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698246492] [2025-04-24 17:57:11,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-24 17:57:11,872 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-24 17:57:11,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-24 17:57:11,872 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-24 17:57:11,872 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-04-24 17:57:11,872 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-04-24 17:57:11,872 INFO L485 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2025-04-24 17:57:11,872 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 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) [2025-04-24 17:57:11,872 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:11,873 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:11,873 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 5 states. [2025-04-24 17:57:11,873 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:11,873 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2025-04-24 17:57:11,949 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:11,949 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:11,950 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-24 17:57:11,950 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:11,950 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:11,950 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-04-24 17:57:11,950 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err1ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err1ASSERT_VIOLATIONERROR_FUNCTION] === [2025-04-24 17:57:11,950 INFO L305 artialOrderCegarLoop]: Trying commutativity condition synthesis. [2025-04-24 17:57:11,950 INFO L139 ounterexampleChecker]: Examining path program with hash 1712694920, occurence #1 [2025-04-24 17:57:11,950 INFO L141 ounterexampleChecker]: Commutativity condition synthesis is only active after more than 2 occurrences. Skipping... [2025-04-24 17:57:11,951 INFO L316 artialOrderCegarLoop]: No commutativity proof found, falling back to feasibility check. [2025-04-24 17:57:11,951 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-24 17:57:11,951 INFO L85 PathProgramCache]: Analyzing trace with hash -794371518, now seen corresponding path program 1 times [2025-04-24 17:57:11,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-24 17:57:11,951 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612824049] [2025-04-24 17:57:11,951 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-24 17:57:11,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-24 17:57:11,978 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 96 statements into 1 equivalence classes. [2025-04-24 17:57:11,992 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 96 of 96 statements. [2025-04-24 17:57:11,992 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-24 17:57:11,992 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-24 17:57:12,203 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-24 17:57:12,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-24 17:57:12,204 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612824049] [2025-04-24 17:57:12,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612824049] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-24 17:57:12,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-24 17:57:12,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-24 17:57:12,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064672149] [2025-04-24 17:57:12,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-24 17:57:12,204 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-24 17:57:12,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-24 17:57:12,205 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-24 17:57:12,206 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-24 17:57:12,206 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-04-24 17:57:12,206 INFO L485 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2025-04-24 17:57:12,206 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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) [2025-04-24 17:57:12,206 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:12,206 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:12,206 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 5 states. [2025-04-24 17:57:12,206 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:12,206 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:12,206 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2025-04-24 17:57:12,251 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:12,251 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:12,251 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-24 17:57:12,251 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:12,251 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:12,253 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:12,253 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-04-24 17:57:12,253 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err1ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t1Err1ASSERT_VIOLATIONERROR_FUNCTION] === [2025-04-24 17:57:12,253 INFO L305 artialOrderCegarLoop]: Trying commutativity condition synthesis. [2025-04-24 17:57:12,253 INFO L139 ounterexampleChecker]: Examining path program with hash -628952118, occurence #1 [2025-04-24 17:57:12,253 INFO L141 ounterexampleChecker]: Commutativity condition synthesis is only active after more than 2 occurrences. Skipping... [2025-04-24 17:57:12,253 INFO L316 artialOrderCegarLoop]: No commutativity proof found, falling back to feasibility check. [2025-04-24 17:57:12,253 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-24 17:57:12,253 INFO L85 PathProgramCache]: Analyzing trace with hash 132224063, now seen corresponding path program 2 times [2025-04-24 17:57:12,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-24 17:57:12,253 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640411713] [2025-04-24 17:57:12,254 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-24 17:57:12,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-24 17:57:12,267 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-04-24 17:57:12,272 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 17 of 37 statements. [2025-04-24 17:57:12,272 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-04-24 17:57:12,272 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-24 17:57:12,317 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-04-24 17:57:12,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-24 17:57:12,317 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640411713] [2025-04-24 17:57:12,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640411713] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-24 17:57:12,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-24 17:57:12,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-04-24 17:57:12,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417057495] [2025-04-24 17:57:12,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-24 17:57:12,318 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-24 17:57:12,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-24 17:57:12,320 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-24 17:57:12,320 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-04-24 17:57:12,320 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-04-24 17:57:12,320 INFO L485 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2025-04-24 17:57:12,321 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 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) [2025-04-24 17:57:12,321 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:12,321 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:12,321 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 5 states. [2025-04-24 17:57:12,321 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:12,321 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:12,321 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:12,321 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2025-04-24 17:57:12,518 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:12,518 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:12,518 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-24 17:57:12,518 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:12,518 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:12,519 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:12,519 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-24 17:57:12,522 INFO L790 garLoopResultBuilder]: Registering result SAFE for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2025-04-24 17:57:12,523 INFO L790 garLoopResultBuilder]: Registering result SAFE for location t1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2025-04-24 17:57:12,524 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-04-24 17:57:12,527 INFO L422 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1] [2025-04-24 17:57:12,528 INFO L320 ceAbstractionStarter]: Result for error location t1Thread1of1ForFork0 was SAFE,SAFE (1/3) [2025-04-24 17:57:12,532 INFO L125 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-24 17:57:12,532 INFO L177 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2025-04-24 17:57:12,532 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2025-04-24 17:57:12,533 INFO L340 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, 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;@67a8beb0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-24 17:57:12,533 INFO L341 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2025-04-24 17:57:12,535 INFO L790 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2025-04-24 17:57:12,535 INFO L790 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2025-04-24 17:57:12,535 INFO L422 BasicCegarLoop]: Path program histogram: [] [2025-04-24 17:57:12,536 INFO L320 ceAbstractionStarter]: Result for error location ULTIMATE.start was SAFE,SAFE (2/3) [2025-04-24 17:57:12,537 INFO L125 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-24 17:57:12,538 INFO L177 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2025-04-24 17:57:12,539 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == t2Thread1of1ForFork1 ======== [2025-04-24 17:57:12,539 INFO L340 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, 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;@67a8beb0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-24 17:57:12,539 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-04-24 17:57:12,558 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [t2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-04-24 17:57:12,559 INFO L305 artialOrderCegarLoop]: Trying commutativity condition synthesis. [2025-04-24 17:57:12,559 INFO L139 ounterexampleChecker]: Examining path program with hash -1752343854, occurence #1 [2025-04-24 17:57:12,559 INFO L141 ounterexampleChecker]: Commutativity condition synthesis is only active after more than 2 occurrences. Skipping... [2025-04-24 17:57:12,559 INFO L316 artialOrderCegarLoop]: No commutativity proof found, falling back to feasibility check. [2025-04-24 17:57:12,559 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-24 17:57:12,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1461160721, now seen corresponding path program 1 times [2025-04-24 17:57:12,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-24 17:57:12,559 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731141495] [2025-04-24 17:57:12,559 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-24 17:57:12,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-24 17:57:12,566 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-04-24 17:57:12,575 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-04-24 17:57:12,576 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-24 17:57:12,576 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-24 17:57:12,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-24 17:57:12,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-24 17:57:12,613 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731141495] [2025-04-24 17:57:12,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731141495] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-24 17:57:12,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-24 17:57:12,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-04-24 17:57:12,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977825559] [2025-04-24 17:57:12,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-24 17:57:12,614 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-24 17:57:12,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-24 17:57:12,614 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-24 17:57:12,614 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-24 17:57:12,614 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-04-24 17:57:12,614 INFO L485 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2025-04-24 17:57:12,614 INFO L486 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) [2025-04-24 17:57:12,614 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2025-04-24 17:57:12,677 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:12,677 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-04-24 17:57:12,677 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [t2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-04-24 17:57:12,677 INFO L305 artialOrderCegarLoop]: Trying commutativity condition synthesis. [2025-04-24 17:57:12,677 INFO L139 ounterexampleChecker]: Examining path program with hash 86880408, occurence #1 [2025-04-24 17:57:12,677 INFO L141 ounterexampleChecker]: Commutativity condition synthesis is only active after more than 2 occurrences. Skipping... [2025-04-24 17:57:12,677 INFO L316 artialOrderCegarLoop]: No commutativity proof found, falling back to feasibility check. [2025-04-24 17:57:12,678 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-24 17:57:12,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1260469660, now seen corresponding path program 1 times [2025-04-24 17:57:12,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-24 17:57:12,678 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870465567] [2025-04-24 17:57:12,678 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-24 17:57:12,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-24 17:57:12,695 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes. [2025-04-24 17:57:12,703 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements. [2025-04-24 17:57:12,704 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-24 17:57:12,704 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-24 17:57:12,774 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-04-24 17:57:12,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-24 17:57:12,775 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870465567] [2025-04-24 17:57:12,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870465567] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-24 17:57:12,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-24 17:57:12,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-24 17:57:12,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900871262] [2025-04-24 17:57:12,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-24 17:57:12,776 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-24 17:57:12,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-24 17:57:12,777 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-24 17:57:12,777 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-24 17:57:12,777 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-04-24 17:57:12,777 INFO L485 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2025-04-24 17:57:12,777 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2025-04-24 17:57:12,778 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:12,778 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2025-04-24 17:57:12,830 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:12,831 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:12,831 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-04-24 17:57:12,831 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [t2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-04-24 17:57:12,831 INFO L305 artialOrderCegarLoop]: Trying commutativity condition synthesis. [2025-04-24 17:57:12,831 INFO L139 ounterexampleChecker]: Examining path program with hash -1757242318, occurence #1 [2025-04-24 17:57:12,831 INFO L141 ounterexampleChecker]: Commutativity condition synthesis is only active after more than 2 occurrences. Skipping... [2025-04-24 17:57:12,831 INFO L316 artialOrderCegarLoop]: No commutativity proof found, falling back to feasibility check. [2025-04-24 17:57:12,831 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-24 17:57:12,832 INFO L85 PathProgramCache]: Analyzing trace with hash -880604057, now seen corresponding path program 1 times [2025-04-24 17:57:12,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-24 17:57:12,832 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702671556] [2025-04-24 17:57:12,832 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-24 17:57:12,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-24 17:57:12,842 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 48 statements into 1 equivalence classes. [2025-04-24 17:57:12,847 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 48 of 48 statements. [2025-04-24 17:57:12,847 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-24 17:57:12,847 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-24 17:57:12,875 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-24 17:57:12,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-24 17:57:12,875 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702671556] [2025-04-24 17:57:12,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702671556] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-24 17:57:12,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-24 17:57:12,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-24 17:57:12,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317548064] [2025-04-24 17:57:12,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-24 17:57:12,876 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-24 17:57:12,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-24 17:57:12,877 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-24 17:57:12,877 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-24 17:57:12,877 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-04-24 17:57:12,877 INFO L485 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2025-04-24 17:57:12,877 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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) [2025-04-24 17:57:12,877 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:12,877 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:12,877 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2025-04-24 17:57:12,934 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:12,934 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:12,934 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:12,934 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-04-24 17:57:12,934 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [t2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-04-24 17:57:12,934 INFO L305 artialOrderCegarLoop]: Trying commutativity condition synthesis. [2025-04-24 17:57:12,934 INFO L139 ounterexampleChecker]: Examining path program with hash -1331552033, occurence #1 [2025-04-24 17:57:12,934 INFO L141 ounterexampleChecker]: Commutativity condition synthesis is only active after more than 2 occurrences. Skipping... [2025-04-24 17:57:12,934 INFO L316 artialOrderCegarLoop]: No commutativity proof found, falling back to feasibility check. [2025-04-24 17:57:12,935 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-24 17:57:12,935 INFO L85 PathProgramCache]: Analyzing trace with hash -633256186, now seen corresponding path program 1 times [2025-04-24 17:57:12,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-24 17:57:12,935 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729545632] [2025-04-24 17:57:12,935 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-24 17:57:12,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-24 17:57:12,943 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-04-24 17:57:12,948 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-04-24 17:57:12,948 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-24 17:57:12,948 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-24 17:57:12,967 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-04-24 17:57:12,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-24 17:57:12,967 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729545632] [2025-04-24 17:57:12,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729545632] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-24 17:57:12,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-24 17:57:12,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-24 17:57:12,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688093001] [2025-04-24 17:57:12,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-24 17:57:12,967 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-24 17:57:12,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-24 17:57:12,968 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-24 17:57:12,968 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-24 17:57:12,968 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-04-24 17:57:12,968 INFO L485 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2025-04-24 17:57:12,968 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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) [2025-04-24 17:57:12,968 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:12,968 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:12,968 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:12,968 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2025-04-24 17:57:13,016 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:13,017 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:13,017 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:13,017 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:13,017 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-04-24 17:57:13,017 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [t2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-04-24 17:57:13,017 INFO L305 artialOrderCegarLoop]: Trying commutativity condition synthesis. [2025-04-24 17:57:13,017 INFO L139 ounterexampleChecker]: Examining path program with hash -105003664, occurence #1 [2025-04-24 17:57:13,017 INFO L141 ounterexampleChecker]: Commutativity condition synthesis is only active after more than 2 occurrences. Skipping... [2025-04-24 17:57:13,017 INFO L316 artialOrderCegarLoop]: No commutativity proof found, falling back to feasibility check. [2025-04-24 17:57:13,018 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-24 17:57:13,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1696723238, now seen corresponding path program 1 times [2025-04-24 17:57:13,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-24 17:57:13,018 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420639085] [2025-04-24 17:57:13,018 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-24 17:57:13,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-24 17:57:13,028 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-04-24 17:57:13,032 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-04-24 17:57:13,033 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-24 17:57:13,033 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-24 17:57:13,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-24 17:57:13,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-24 17:57:13,079 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420639085] [2025-04-24 17:57:13,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420639085] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-24 17:57:13,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-24 17:57:13,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-04-24 17:57:13,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992942059] [2025-04-24 17:57:13,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-24 17:57:13,080 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-24 17:57:13,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-24 17:57:13,080 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-24 17:57:13,081 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-04-24 17:57:13,081 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-04-24 17:57:13,081 INFO L485 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2025-04-24 17:57:13,081 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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) [2025-04-24 17:57:13,081 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:13,081 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:13,081 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:13,081 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:13,081 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2025-04-24 17:57:13,156 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:13,156 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:13,156 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:13,156 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:13,157 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-24 17:57:13,157 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-04-24 17:57:13,157 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [t2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-04-24 17:57:13,157 INFO L305 artialOrderCegarLoop]: Trying commutativity condition synthesis. [2025-04-24 17:57:13,157 INFO L139 ounterexampleChecker]: Examining path program with hash 1635912442, occurence #1 [2025-04-24 17:57:13,157 INFO L141 ounterexampleChecker]: Commutativity condition synthesis is only active after more than 2 occurrences. Skipping... [2025-04-24 17:57:13,157 INFO L316 artialOrderCegarLoop]: No commutativity proof found, falling back to feasibility check. [2025-04-24 17:57:13,157 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-24 17:57:13,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1228033803, now seen corresponding path program 1 times [2025-04-24 17:57:13,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-24 17:57:13,158 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376936533] [2025-04-24 17:57:13,158 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-24 17:57:13,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-24 17:57:13,166 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-04-24 17:57:13,171 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-04-24 17:57:13,171 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-24 17:57:13,171 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-24 17:57:13,236 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-24 17:57:13,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-24 17:57:13,236 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376936533] [2025-04-24 17:57:13,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376936533] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-24 17:57:13,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-24 17:57:13,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-24 17:57:13,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868236091] [2025-04-24 17:57:13,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-24 17:57:13,236 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-24 17:57:13,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-24 17:57:13,236 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-24 17:57:13,236 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-04-24 17:57:13,236 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-04-24 17:57:13,236 INFO L485 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2025-04-24 17:57:13,237 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 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) [2025-04-24 17:57:13,237 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:13,237 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:13,237 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:13,237 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:13,237 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 5 states. [2025-04-24 17:57:13,237 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2025-04-24 17:57:13,279 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:13,279 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:13,279 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:13,279 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:13,279 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-24 17:57:13,280 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:13,280 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2025-04-24 17:57:13,280 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [t2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-04-24 17:57:13,280 INFO L305 artialOrderCegarLoop]: Trying commutativity condition synthesis. [2025-04-24 17:57:13,280 INFO L139 ounterexampleChecker]: Examining path program with hash 1635912442, occurence #2 [2025-04-24 17:57:13,280 INFO L145 ounterexampleChecker]: Trying to synthesize and prove commutativity condition. [2025-04-24 17:57:13,280 INFO L166 ounterexampleChecker]: Performing commutativity condition check at non-minimality point 1 [2025-04-24 17:57:13,283 WARN L190 ounterexampleChecker]: Statements were already independent. [2025-04-24 17:57:13,283 INFO L166 ounterexampleChecker]: Performing commutativity condition check at non-minimality point 4 [2025-04-24 17:57:13,283 WARN L190 ounterexampleChecker]: Statements were already independent. [2025-04-24 17:57:13,284 INFO L166 ounterexampleChecker]: Performing commutativity condition check at non-minimality point 13 [2025-04-24 17:57:13,284 INFO L209 ounterexampleChecker]: No commutativity condition found. [2025-04-24 17:57:13,284 INFO L166 ounterexampleChecker]: Performing commutativity condition check at non-minimality point 16 [2025-04-24 17:57:13,284 INFO L209 ounterexampleChecker]: No commutativity condition found. [2025-04-24 17:57:13,284 INFO L166 ounterexampleChecker]: Performing commutativity condition check at non-minimality point 24 [2025-04-24 17:57:13,284 INFO L209 ounterexampleChecker]: No commutativity condition found. [2025-04-24 17:57:13,284 INFO L166 ounterexampleChecker]: Performing commutativity condition check at non-minimality point 33 [2025-04-24 17:57:13,284 INFO L209 ounterexampleChecker]: No commutativity condition found. [2025-04-24 17:57:13,284 INFO L166 ounterexampleChecker]: Performing commutativity condition check at non-minimality point 36 [2025-04-24 17:57:13,284 INFO L209 ounterexampleChecker]: No commutativity condition found. [2025-04-24 17:57:13,284 WARN L214 ounterexampleChecker]: Failed to synthesize and prove commutativity condition. [2025-04-24 17:57:13,284 INFO L316 artialOrderCegarLoop]: No commutativity proof found, falling back to feasibility check. [2025-04-24 17:57:13,284 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-24 17:57:13,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1756823450, now seen corresponding path program 1 times [2025-04-24 17:57:13,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-24 17:57:13,285 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702340673] [2025-04-24 17:57:13,285 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-24 17:57:13,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-24 17:57:13,294 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-04-24 17:57:13,367 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-04-24 17:57:13,367 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-24 17:57:13,367 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-04-24 17:57:13,374 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1632846524] [2025-04-24 17:57:13,374 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-24 17:57:13,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-24 17:57:13,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-24 17:57:13,376 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-24 17:57:13,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-04-24 17:57:13,444 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-04-24 17:57:13,554 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-04-24 17:57:13,554 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-24 17:57:13,554 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-24 17:57:13,563 INFO L256 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-04-24 17:57:13,569 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-24 17:57:14,004 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2025-04-24 17:57:14,190 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-24 17:57:14,190 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-24 17:57:20,753 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 466 treesize of output 446 [2025-04-24 17:57:20,843 INFO L325 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2025-04-24 17:57:20,843 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 496 treesize of output 427 [2025-04-24 17:57:32,616 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-24 17:57:32,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-24 17:57:32,616 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702340673] [2025-04-24 17:57:32,617 WARN L301 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-04-24 17:57:32,617 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632846524] [2025-04-24 17:57:32,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632846524] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-24 17:57:32,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-04-24 17:57:32,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2025-04-24 17:57:32,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951623083] [2025-04-24 17:57:32,617 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-04-24 17:57:32,617 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-04-24 17:57:32,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-24 17:57:32,618 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-04-24 17:57:32,618 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2025-04-24 17:57:32,618 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-04-24 17:57:32,618 INFO L485 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2025-04-24 17:57:32,618 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 26 states have internal predecessors, (87), 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) [2025-04-24 17:57:32,618 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:32,618 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:32,618 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:32,618 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:32,618 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 5 states. [2025-04-24 17:57:32,618 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:57:32,618 INFO L153 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2025-04-24 17:57:44,886 WARN L286 SmtUtils]: Spent 7.83s on a formula simplification. DAG size of input: 193 DAG size of output: 100 (called from [L 386] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-04-24 17:58:06,519 WARN L286 SmtUtils]: Spent 14.74s on a formula simplification. DAG size of input: 132 DAG size of output: 129 (called from [L 386] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-04-24 17:58:22,210 WARN L286 SmtUtils]: Spent 12.27s on a formula simplification. DAG size of input: 128 DAG size of output: 125 (called from [L 386] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-04-24 17:58:37,613 WARN L286 SmtUtils]: Spent 14.51s on a formula simplification. DAG size of input: 123 DAG size of output: 121 (called from [L 386] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-04-24 17:58:47,139 WARN L286 SmtUtils]: Spent 9.06s on a formula simplification. DAG size of input: 128 DAG size of output: 127 (called from [L 386] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-04-24 17:59:04,432 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:59:04,432 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:59:04,432 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:59:04,432 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:59:04,432 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-24 17:59:04,432 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-24 17:59:04,433 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2025-04-24 17:59:04,440 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-04-24 17:59:04,636 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-04-24 17:59:04,637 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [t2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-04-24 17:59:04,637 INFO L305 artialOrderCegarLoop]: Trying commutativity condition synthesis. [2025-04-24 17:59:04,637 INFO L139 ounterexampleChecker]: Examining path program with hash 1986463147, occurence #1 [2025-04-24 17:59:04,637 INFO L141 ounterexampleChecker]: Commutativity condition synthesis is only active after more than 2 occurrences. Skipping... [2025-04-24 17:59:04,637 INFO L316 artialOrderCegarLoop]: No commutativity proof found, falling back to feasibility check. [2025-04-24 17:59:04,637 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-24 17:59:04,638 INFO L85 PathProgramCache]: Analyzing trace with hash 666289573, now seen corresponding path program 2 times [2025-04-24 17:59:04,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-24 17:59:04,638 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261083788] [2025-04-24 17:59:04,638 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-24 17:59:04,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-24 17:59:04,653 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 105 statements into 2 equivalence classes. [2025-04-24 17:59:04,924 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 105 of 105 statements. [2025-04-24 17:59:04,924 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-24 17:59:04,924 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-04-24 17:59:04,927 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [80440660] [2025-04-24 17:59:04,927 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-24 17:59:04,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-24 17:59:04,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 [2025-04-24 17:59:04,929 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-24 17:59:04,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-04-24 17:59:05,008 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 105 statements into 2 equivalence classes. [2025-04-24 17:59:06,249 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 105 of 105 statements. [2025-04-24 17:59:06,249 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-24 17:59:06,249 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-24 17:59:06,257 INFO L256 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 121 conjuncts are in the unsatisfiable core [2025-04-24 17:59:06,263 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-24 17:59:06,532 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 58 [2025-04-24 17:59:07,030 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 68 [2025-04-24 17:59:07,673 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 71 [2025-04-24 17:59:08,273 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 64 [2025-04-24 17:59:08,982 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 71 [2025-04-24 17:59:09,315 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 0 proven. 188 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-24 17:59:09,315 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-24 18:00:10,798 WARN L286 SmtUtils]: Spent 34.50s on a formula simplification. DAG size of input: 301 DAG size of output: 275 (called from [L 386] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-04-24 18:01:32,355 WARN L286 SmtUtils]: Spent 11.09s on a formula simplification that was a NOOP. DAG size: 268 (called from [L 386] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-04-24 18:01:57,607 WARN L286 SmtUtils]: Spent 15.42s on a formula simplification. DAG size of input: 343 DAG size of output: 337 (called from [L 386] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-04-24 18:02:51,813 WARN L286 SmtUtils]: Spent 11.55s on a formula simplification that was a NOOP. DAG size: 339 (called from [L 386] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-04-24 18:03:18,979 WARN L286 SmtUtils]: Spent 8.69s on a formula simplification that was a NOOP. DAG size: 313 (called from [L 386] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-04-24 18:04:06,713 WARN L286 SmtUtils]: Spent 7.88s on a formula simplification that was a NOOP. DAG size: 289 (called from [L 386] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)