/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/loops/while_infinite_loop_4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 22:01:34,551 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 22:01:34,552 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 22:01:34,569 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 22:01:34,569 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 22:01:34,570 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 22:01:34,570 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 22:01:34,572 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 22:01:34,573 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 22:01:34,573 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 22:01:34,574 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 22:01:34,575 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 22:01:34,575 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 22:01:34,575 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 22:01:34,576 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 22:01:34,577 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 22:01:34,577 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 22:01:34,578 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 22:01:34,579 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 22:01:34,580 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 22:01:34,581 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 22:01:34,582 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 22:01:34,583 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 22:01:34,583 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 22:01:34,585 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 22:01:34,585 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 22:01:34,585 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 22:01:34,586 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 22:01:34,586 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 22:01:34,587 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 22:01:34,587 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 22:01:34,587 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 22:01:34,588 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 22:01:34,588 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 22:01:34,589 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 22:01:34,589 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 22:01:34,590 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 22:01:34,590 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 22:01:34,590 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 22:01:34,590 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 22:01:34,591 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 22:01:34,592 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-02 22:01:34,606 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 22:01:34,606 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 22:01:34,606 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 22:01:34,607 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 22:01:34,607 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 22:01:34,607 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 22:01:34,607 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 22:01:34,607 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 22:01:34,608 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 22:01:34,608 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 22:01:34,608 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 22:01:34,608 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 22:01:34,608 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 22:01:34,608 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 22:01:34,608 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 22:01:34,608 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 22:01:34,608 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 22:01:34,608 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 22:01:34,609 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 22:01:34,609 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 22:01:34,609 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 22:01:34,609 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 22:01:34,609 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 22:01:34,609 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 22:01:34,609 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 22:01:34,610 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 22:01:34,610 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 22:01:34,610 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 22:01:34,610 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 22:01:34,610 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 22:01:34,610 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 22:01:34,610 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 22:01:34,610 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 22:01:34,610 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 22:01:34,610 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 22:01:34,611 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 22:01:34,611 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 22:01:34,611 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 22:01:34,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 22:01:34,611 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 22:01:34,611 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 22:01:34,611 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 22:01:34,750 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 22:01:34,763 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 22:01:34,764 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 22:01:34,765 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 22:01:34,765 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 22:01:34,766 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/while_infinite_loop_4.c [2023-04-02 22:01:35,806 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 22:01:35,932 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 22:01:35,932 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/while_infinite_loop_4.c [2023-04-02 22:01:35,936 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52775c202/50cedb14128d4ec383d7a99642eb65f5/FLAG53863fb52 [2023-04-02 22:01:35,949 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52775c202/50cedb14128d4ec383d7a99642eb65f5 [2023-04-02 22:01:35,951 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 22:01:35,952 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 22:01:35,956 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 22:01:35,956 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 22:01:35,959 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 22:01:35,960 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 10:01:35" (1/1) ... [2023-04-02 22:01:35,961 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@697be78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:01:35, skipping insertion in model container [2023-04-02 22:01:35,961 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 10:01:35" (1/1) ... [2023-04-02 22:01:35,966 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 22:01:35,975 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 22:01:36,079 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/while_infinite_loop_4.c[333,346] [2023-04-02 22:01:36,088 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 22:01:36,098 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 22:01:36,107 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/while_infinite_loop_4.c[333,346] [2023-04-02 22:01:36,109 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 22:01:36,117 INFO L208 MainTranslator]: Completed translation [2023-04-02 22:01:36,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:01:36 WrapperNode [2023-04-02 22:01:36,118 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 22:01:36,119 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 22:01:36,119 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 22:01:36,119 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 22:01:36,126 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:01:36" (1/1) ... [2023-04-02 22:01:36,126 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:01:36" (1/1) ... [2023-04-02 22:01:36,131 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:01:36" (1/1) ... [2023-04-02 22:01:36,131 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:01:36" (1/1) ... [2023-04-02 22:01:36,134 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:01:36" (1/1) ... [2023-04-02 22:01:36,137 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:01:36" (1/1) ... [2023-04-02 22:01:36,140 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:01:36" (1/1) ... [2023-04-02 22:01:36,141 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:01:36" (1/1) ... [2023-04-02 22:01:36,142 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 22:01:36,143 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 22:01:36,143 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 22:01:36,143 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 22:01:36,144 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:01:36" (1/1) ... [2023-04-02 22:01:36,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 22:01:36,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:01:36,178 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 22:01:36,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 22:01:36,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 22:01:36,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 22:01:36,217 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 22:01:36,217 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 22:01:36,217 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2023-04-02 22:01:36,217 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 22:01:36,217 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 22:01:36,217 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 22:01:36,217 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 22:01:36,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 22:01:36,217 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 22:01:36,218 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2023-04-02 22:01:36,218 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 22:01:36,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 22:01:36,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 22:01:36,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 22:01:36,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 22:01:36,219 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 22:01:36,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 22:01:36,281 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 22:01:36,282 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 22:01:36,363 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 22:01:36,376 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 22:01:36,376 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-02 22:01:36,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 10:01:36 BoogieIcfgContainer [2023-04-02 22:01:36,378 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 22:01:36,379 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 22:01:36,379 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 22:01:36,381 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 22:01:36,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 10:01:35" (1/3) ... [2023-04-02 22:01:36,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@430cee01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 10:01:36, skipping insertion in model container [2023-04-02 22:01:36,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:01:36" (2/3) ... [2023-04-02 22:01:36,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@430cee01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 10:01:36, skipping insertion in model container [2023-04-02 22:01:36,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 10:01:36" (3/3) ... [2023-04-02 22:01:36,383 INFO L112 eAbstractionObserver]: Analyzing ICFG while_infinite_loop_4.c [2023-04-02 22:01:36,394 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 22:01:36,395 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 22:01:36,424 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 22:01:36,428 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@24206e57, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 22:01:36,428 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 22:01:36,431 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 11 states have internal predecessors, (12), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 22:01:36,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-04-02 22:01:36,435 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:01:36,435 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:01:36,436 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:01:36,439 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:01:36,439 INFO L85 PathProgramCache]: Analyzing trace with hash -296039610, now seen corresponding path program 1 times [2023-04-02 22:01:36,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:01:36,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269768169] [2023-04-02 22:01:36,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:01:36,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:01:36,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:01:36,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:01:36,532 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:01:36,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269768169] [2023-04-02 22:01:36,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269768169] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:01:36,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:01:36,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-02 22:01:36,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995906715] [2023-04-02 22:01:36,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:01:36,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-02 22:01:36,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:01:36,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-02 22:01:36,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 22:01:36,564 INFO L87 Difference]: Start difference. First operand has 20 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 11 states have internal predecessors, (12), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:01:36,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:01:36,606 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2023-04-02 22:01:36,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-02 22:01:36,607 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2023-04-02 22:01:36,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:01:36,612 INFO L225 Difference]: With dead ends: 31 [2023-04-02 22:01:36,613 INFO L226 Difference]: Without dead ends: 15 [2023-04-02 22:01:36,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 22:01:36,619 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:01:36,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:01:36,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-04-02 22:01:36,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-04-02 22:01:36,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 8 states have internal predecessors, (8), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 22:01:36,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2023-04-02 22:01:36,664 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 9 [2023-04-02 22:01:36,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:01:36,665 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2023-04-02 22:01:36,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:01:36,665 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2023-04-02 22:01:36,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-02 22:01:36,665 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:01:36,665 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:01:36,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 22:01:36,666 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:01:36,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:01:36,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1491438284, now seen corresponding path program 1 times [2023-04-02 22:01:36,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:01:36,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830986394] [2023-04-02 22:01:36,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:01:36,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:01:36,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-02 22:01:36,693 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-04-02 22:01:36,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-02 22:01:36,713 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-04-02 22:01:36,713 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-04-02 22:01:36,714 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-02 22:01:36,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 22:01:36,718 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-04-02 22:01:36,720 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-02 22:01:36,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.04 10:01:36 BoogieIcfgContainer [2023-04-02 22:01:36,738 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-02 22:01:36,739 INFO L158 Benchmark]: Toolchain (without parser) took 786.31ms. Allocated memory is still 216.0MB. Free memory was 170.3MB in the beginning and 123.4MB in the end (delta: 46.8MB). Peak memory consumption was 47.2MB. Max. memory is 8.0GB. [2023-04-02 22:01:36,739 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 172.0MB. Free memory is still 124.3MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-02 22:01:36,740 INFO L158 Benchmark]: CACSL2BoogieTranslator took 161.56ms. Allocated memory is still 216.0MB. Free memory was 170.3MB in the beginning and 159.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-04-02 22:01:36,743 INFO L158 Benchmark]: Boogie Preprocessor took 23.53ms. Allocated memory is still 216.0MB. Free memory was 159.8MB in the beginning and 158.4MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-04-02 22:01:36,743 INFO L158 Benchmark]: RCFGBuilder took 235.15ms. Allocated memory is still 216.0MB. Free memory was 158.4MB in the beginning and 147.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-04-02 22:01:36,744 INFO L158 Benchmark]: TraceAbstraction took 358.69ms. Allocated memory is still 216.0MB. Free memory was 147.2MB in the beginning and 123.4MB in the end (delta: 23.8MB). Peak memory consumption was 24.1MB. Max. memory is 8.0GB. [2023-04-02 22:01:36,745 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 172.0MB. Free memory is still 124.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 161.56ms. Allocated memory is still 216.0MB. Free memory was 170.3MB in the beginning and 159.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 23.53ms. Allocated memory is still 216.0MB. Free memory was 159.8MB in the beginning and 158.4MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 235.15ms. Allocated memory is still 216.0MB. Free memory was 158.4MB in the beginning and 147.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 358.69ms. Allocated memory is still 216.0MB. Free memory was 147.2MB in the beginning and 123.4MB in the end (delta: 23.8MB). Peak memory consumption was 24.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L12] int x=0; [L26] COND TRUE 1 VAL [\old(x)=0, x=0] [L28] CALL eval() VAL [\old(x)=0, x=0] [L16] COND TRUE 1 [L17] x=1 [L28] RET eval() VAL [\old(x)=0, x=1] [L29] CALL __VERIFIER_assert(x==0) VAL [\old(cond)=0, \old(x)=0, x=1] [L6] COND TRUE !(cond) VAL [\old(cond)=0, \old(x)=0, cond=0, x=1] [L7] reach_error() VAL [\old(cond)=0, \old(x)=0, cond=0, x=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 13 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2 IncrementalHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 13 mSDtfsCounter, 2 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 21 NumberOfCodeBlocks, 21 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 8 ConstructedInterpolants, 0 QuantifiedInterpolants, 8 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-04-02 22:01:36,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...