/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/nla-digbench-scaling/sqrt1-ll_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 23:34:23,466 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 23:34:23,468 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 23:34:23,499 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 23:34:23,499 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 23:34:23,502 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 23:34:23,505 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 23:34:23,507 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 23:34:23,509 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 23:34:23,513 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 23:34:23,514 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 23:34:23,516 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 23:34:23,517 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 23:34:23,521 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 23:34:23,522 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 23:34:23,523 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 23:34:23,524 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 23:34:23,524 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 23:34:23,526 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 23:34:23,531 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 23:34:23,532 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 23:34:23,533 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 23:34:23,534 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 23:34:23,535 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 23:34:23,543 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 23:34:23,543 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 23:34:23,543 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 23:34:23,545 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 23:34:23,546 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 23:34:23,546 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 23:34:23,547 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 23:34:23,547 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 23:34:23,549 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 23:34:23,549 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 23:34:23,550 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 23:34:23,550 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 23:34:23,550 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 23:34:23,551 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 23:34:23,551 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 23:34:23,551 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 23:34:23,552 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 23:34:23,553 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 23:34:23,587 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 23:34:23,587 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 23:34:23,587 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 23:34:23,587 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 23:34:23,588 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 23:34:23,588 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 23:34:23,588 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 23:34:23,589 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 23:34:23,589 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 23:34:23,589 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 23:34:23,589 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 23:34:23,590 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 23:34:23,590 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 23:34:23,590 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 23:34:23,590 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 23:34:23,590 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 23:34:23,590 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 23:34:23,590 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 23:34:23,591 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 23:34:23,591 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 23:34:23,592 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 23:34:23,592 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 23:34:23,592 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 23:34:23,592 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 23:34:23,592 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 23:34:23,593 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 23:34:23,593 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 23:34:23,593 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 23:34:23,593 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 23:34:23,593 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 23:34:23,593 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 23:34:23,593 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 23:34:23,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:34:23,594 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 23:34:23,594 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 23:34:23,594 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 23:34:23,594 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 23:34:23,594 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 23:34:23,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 23:34:23,594 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 23:34:23,594 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 23:34:23,595 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 23:34:23,832 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 23:34:23,854 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 23:34:23,856 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 23:34:23,857 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 23:34:23,857 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 23:34:23,858 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_valuebound2.c [2023-04-02 23:34:24,942 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 23:34:25,127 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 23:34:25,128 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_valuebound2.c [2023-04-02 23:34:25,134 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d5c6101c/f658c829c6c249caaa5cec03d26fc202/FLAGd8318e6ad [2023-04-02 23:34:25,145 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d5c6101c/f658c829c6c249caaa5cec03d26fc202 [2023-04-02 23:34:25,147 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 23:34:25,148 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 23:34:25,149 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 23:34:25,149 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 23:34:25,152 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 23:34:25,153 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:34:25" (1/1) ... [2023-04-02 23:34:25,154 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c0eec9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:34:25, skipping insertion in model container [2023-04-02 23:34:25,154 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:34:25" (1/1) ... [2023-04-02 23:34:25,159 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 23:34:25,170 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 23:34:25,325 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/nla-digbench-scaling/sqrt1-ll_valuebound2.c[520,533] [2023-04-02 23:34:25,342 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:34:25,352 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 23:34:25,362 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/nla-digbench-scaling/sqrt1-ll_valuebound2.c[520,533] [2023-04-02 23:34:25,366 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:34:25,378 INFO L208 MainTranslator]: Completed translation [2023-04-02 23:34:25,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:34:25 WrapperNode [2023-04-02 23:34:25,378 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 23:34:25,379 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 23:34:25,379 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 23:34:25,379 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 23:34:25,388 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:34:25" (1/1) ... [2023-04-02 23:34:25,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:34:25" (1/1) ... [2023-04-02 23:34:25,393 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:34:25" (1/1) ... [2023-04-02 23:34:25,393 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:34:25" (1/1) ... [2023-04-02 23:34:25,396 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:34:25" (1/1) ... [2023-04-02 23:34:25,398 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:34:25" (1/1) ... [2023-04-02 23:34:25,399 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:34:25" (1/1) ... [2023-04-02 23:34:25,400 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:34:25" (1/1) ... [2023-04-02 23:34:25,401 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 23:34:25,402 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 23:34:25,402 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 23:34:25,402 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 23:34:25,403 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:34:25" (1/1) ... [2023-04-02 23:34:25,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:34:25,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:34:25,425 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 23:34:25,427 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 23:34:25,453 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 23:34:25,453 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 23:34:25,454 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 23:34:25,454 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 23:34:25,454 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 23:34:25,454 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 23:34:25,454 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 23:34:25,454 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 23:34:25,454 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 23:34:25,454 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 23:34:25,454 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 23:34:25,455 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 23:34:25,455 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 23:34:25,455 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 23:34:25,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 23:34:25,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 23:34:25,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 23:34:25,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 23:34:25,455 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 23:34:25,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 23:34:25,506 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 23:34:25,507 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 23:34:25,626 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 23:34:25,644 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 23:34:25,644 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 23:34:25,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:34:25 BoogieIcfgContainer [2023-04-02 23:34:25,646 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 23:34:25,648 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 23:34:25,648 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 23:34:25,651 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 23:34:25,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 11:34:25" (1/3) ... [2023-04-02 23:34:25,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17d6161 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:34:25, skipping insertion in model container [2023-04-02 23:34:25,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:34:25" (2/3) ... [2023-04-02 23:34:25,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17d6161 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:34:25, skipping insertion in model container [2023-04-02 23:34:25,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:34:25" (3/3) ... [2023-04-02 23:34:25,653 INFO L112 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_valuebound2.c [2023-04-02 23:34:25,668 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 23:34:25,668 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 23:34:25,705 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 23:34:25,710 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;@5f704de4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 23:34:25,711 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 23:34:25,714 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-02 23:34:25,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-02 23:34:25,720 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:34:25,720 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:34:25,721 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:34:25,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:34:25,725 INFO L85 PathProgramCache]: Analyzing trace with hash -13911429, now seen corresponding path program 1 times [2023-04-02 23:34:25,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:34:25,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484151452] [2023-04-02 23:34:25,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:34:25,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:34:25,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:34:26,171 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 23:34:26,172 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:34:26,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484151452] [2023-04-02 23:34:26,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484151452] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:34:26,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:34:26,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 23:34:26,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954118965] [2023-04-02 23:34:26,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:34:26,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 23:34:26,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:34:26,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 23:34:26,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:34:26,218 INFO L87 Difference]: Start difference. First operand has 27 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 23:34:26,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:34:26,350 INFO L93 Difference]: Finished difference Result 59 states and 93 transitions. [2023-04-02 23:34:26,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 23:34:26,355 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2023-04-02 23:34:26,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:34:26,361 INFO L225 Difference]: With dead ends: 59 [2023-04-02 23:34:26,361 INFO L226 Difference]: Without dead ends: 35 [2023-04-02 23:34:26,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:34:26,367 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 8 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:34:26,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 77 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:34:26,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-04-02 23:34:26,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2023-04-02 23:34:26,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 15 states have (on average 1.2) internal successors, (18), 17 states have internal predecessors, (18), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-02 23:34:26,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2023-04-02 23:34:26,402 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 14 [2023-04-02 23:34:26,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:34:26,402 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2023-04-02 23:34:26,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 23:34:26,403 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2023-04-02 23:34:26,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-02 23:34:26,404 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:34:26,404 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:34:26,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 23:34:26,404 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:34:26,405 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:34:26,405 INFO L85 PathProgramCache]: Analyzing trace with hash 255999537, now seen corresponding path program 1 times [2023-04-02 23:34:26,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:34:26,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878573890] [2023-04-02 23:34:26,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:34:26,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:34:26,419 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:34:26,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1852274736] [2023-04-02 23:34:26,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:34:26,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:34:26,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:34:26,423 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:34:26,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 23:34:26,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:34:26,486 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-02 23:34:26,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:34:26,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:34:26,650 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:34:26,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:34:26,848 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:34:26,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878573890] [2023-04-02 23:34:26,848 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:34:26,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852274736] [2023-04-02 23:34:26,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852274736] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:34:26,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [20707614] [2023-04-02 23:34:26,877 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-02 23:34:26,877 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:34:26,880 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:34:26,884 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:34:26,885 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:34:26,965 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 23:34:27,129 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2023-04-02 23:34:27,139 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 29 for LOIs [2023-04-02 23:34:27,154 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 23:34:27,169 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:34:27,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [20707614] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:34:27,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:34:27,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [8, 7] total 22 [2023-04-02 23:34:27,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809008329] [2023-04-02 23:34:27,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:34:27,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 23:34:27,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:34:27,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 23:34:27,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2023-04-02 23:34:27,456 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 12 states, 8 states have (on average 1.25) internal successors, (10), 6 states have internal predecessors, (10), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 23:34:28,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:34:28,242 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2023-04-02 23:34:28,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 23:34:28,242 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 8 states have (on average 1.25) internal successors, (10), 6 states have internal predecessors, (10), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 19 [2023-04-02 23:34:28,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:34:28,245 INFO L225 Difference]: With dead ends: 41 [2023-04-02 23:34:28,245 INFO L226 Difference]: Without dead ends: 36 [2023-04-02 23:34:28,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=155, Invalid=715, Unknown=0, NotChecked=0, Total=870 [2023-04-02 23:34:28,247 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 42 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:34:28,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 7 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:34:28,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-04-02 23:34:28,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-04-02 23:34:28,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-02 23:34:28,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2023-04-02 23:34:28,271 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 19 [2023-04-02 23:34:28,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:34:28,271 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2023-04-02 23:34:28,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 8 states have (on average 1.25) internal successors, (10), 6 states have internal predecessors, (10), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 23:34:28,272 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2023-04-02 23:34:28,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-02 23:34:28,273 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:34:28,273 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:34:28,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 23:34:28,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:34:28,479 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:34:28,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:34:28,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1032431887, now seen corresponding path program 1 times [2023-04-02 23:34:28,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:34:28,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862607097] [2023-04-02 23:34:28,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:34:28,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:34:28,490 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:34:28,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [199732002] [2023-04-02 23:34:28,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:34:28,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:34:28,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:34:28,496 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:34:28,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 23:34:28,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:34:28,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2023-04-02 23:34:28,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:34:28,611 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 23:34:28,612 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:34:28,659 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-02 23:34:28,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:34:28,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862607097] [2023-04-02 23:34:28,660 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:34:28,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199732002] [2023-04-02 23:34:28,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199732002] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-02 23:34:28,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:34:28,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2023-04-02 23:34:28,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506542130] [2023-04-02 23:34:28,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:34:28,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 23:34:28,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:34:28,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 23:34:28,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-02 23:34:28,662 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 23:34:28,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:34:28,712 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2023-04-02 23:34:28,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 23:34:28,712 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 31 [2023-04-02 23:34:28,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:34:28,713 INFO L225 Difference]: With dead ends: 42 [2023-04-02 23:34:28,713 INFO L226 Difference]: Without dead ends: 40 [2023-04-02 23:34:28,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-04-02 23:34:28,714 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 7 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 23:34:28,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 58 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 23:34:28,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-04-02 23:34:28,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-04-02 23:34:28,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-02 23:34:28,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2023-04-02 23:34:28,728 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 31 [2023-04-02 23:34:28,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:34:28,728 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2023-04-02 23:34:28,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-02 23:34:28,728 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2023-04-02 23:34:28,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-02 23:34:28,729 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:34:28,729 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:34:28,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 23:34:28,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-02 23:34:28,940 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:34:28,940 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:34:28,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1626754077, now seen corresponding path program 2 times [2023-04-02 23:34:28,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:34:28,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377201350] [2023-04-02 23:34:28,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:34:28,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:34:28,948 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:34:28,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [645544537] [2023-04-02 23:34:28,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 23:34:28,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:34:28,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:34:28,949 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:34:28,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 23:34:28,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-02 23:34:28,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 23:34:28,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjunts are in the unsatisfiable core [2023-04-02 23:34:28,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:34:29,078 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 23:34:29,078 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:34:29,216 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-04-02 23:34:29,216 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:34:29,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377201350] [2023-04-02 23:34:29,216 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:34:29,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645544537] [2023-04-02 23:34:29,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645544537] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:34:29,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2082320091] [2023-04-02 23:34:29,219 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-02 23:34:29,220 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:34:29,220 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:34:29,220 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:34:29,221 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:34:29,249 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 23:34:30,074 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 23:34:30,077 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 29 for LOIs [2023-04-02 23:34:30,083 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 23:34:30,087 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:34:30,454 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '992#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 23:34:30,454 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:34:30,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:34:30,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2023-04-02 23:34:30,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084695809] [2023-04-02 23:34:30,454 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 23:34:30,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-02 23:34:30,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:34:30,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-02 23:34:30,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2023-04-02 23:34:30,456 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2023-04-02 23:34:30,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:34:30,681 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2023-04-02 23:34:30,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 23:34:30,681 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 36 [2023-04-02 23:34:30,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:34:30,684 INFO L225 Difference]: With dead ends: 60 [2023-04-02 23:34:30,684 INFO L226 Difference]: Without dead ends: 55 [2023-04-02 23:34:30,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2023-04-02 23:34:30,686 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 15 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:34:30,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 119 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:34:30,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-04-02 23:34:30,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2023-04-02 23:34:30,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 30 states have internal predecessors, (31), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-04-02 23:34:30,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2023-04-02 23:34:30,714 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 36 [2023-04-02 23:34:30,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:34:30,715 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2023-04-02 23:34:30,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2023-04-02 23:34:30,715 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2023-04-02 23:34:30,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-02 23:34:30,718 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:34:30,718 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:34:30,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 23:34:30,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:34:30,924 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:34:30,924 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:34:30,924 INFO L85 PathProgramCache]: Analyzing trace with hash -64090501, now seen corresponding path program 3 times [2023-04-02 23:34:30,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:34:30,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154787182] [2023-04-02 23:34:30,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:34:30,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:34:30,945 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:34:30,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [406384235] [2023-04-02 23:34:30,946 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 23:34:30,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:34:30,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:34:30,947 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:34:30,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 23:34:31,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 23:34:31,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 23:34:31,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-02 23:34:31,010 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:34:31,094 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 68 proven. 5 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-04-02 23:34:31,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:34:31,165 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 24 proven. 5 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-04-02 23:34:31,165 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:34:31,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154787182] [2023-04-02 23:34:31,165 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:34:31,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406384235] [2023-04-02 23:34:31,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406384235] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:34:31,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [21486901] [2023-04-02 23:34:31,168 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-02 23:34:31,168 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:34:31,168 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:34:31,168 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:34:31,169 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:34:31,187 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 23:34:31,785 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 23:34:31,788 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 29 for LOIs [2023-04-02 23:34:31,793 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 23:34:31,796 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:34:32,137 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1532#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 23:34:32,137 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:34:32,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:34:32,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-04-02 23:34:32,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914723983] [2023-04-02 23:34:32,138 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 23:34:32,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 23:34:32,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:34:32,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 23:34:32,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2023-04-02 23:34:32,139 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 6 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2023-04-02 23:34:32,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:34:32,204 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2023-04-02 23:34:32,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 23:34:32,205 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 6 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) Word has length 58 [2023-04-02 23:34:32,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:34:32,206 INFO L225 Difference]: With dead ends: 57 [2023-04-02 23:34:32,206 INFO L226 Difference]: Without dead ends: 0 [2023-04-02 23:34:32,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2023-04-02 23:34:32,207 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 23:34:32,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 64 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 23:34:32,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-04-02 23:34:32,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-04-02 23:34:32,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2023-04-02 23:34:32,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-04-02 23:34:32,210 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 58 [2023-04-02 23:34:32,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:34:32,211 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-04-02 23:34:32,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 6 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2023-04-02 23:34:32,211 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-04-02 23:34:32,211 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-04-02 23:34:32,213 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-02 23:34:32,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 23:34:32,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:34:32,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-04-02 23:34:33,400 INFO L899 garLoopResultBuilder]: For program point reach_errorEXIT(line 5) no Hoare annotation was computed. [2023-04-02 23:34:33,400 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line 5) no Hoare annotation was computed. [2023-04-02 23:34:33,400 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 8 10) the Hoare annotation is: true [2023-04-02 23:34:33,400 INFO L899 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 8 10) no Hoare annotation was computed. [2023-04-02 23:34:33,400 INFO L899 garLoopResultBuilder]: For program point L33(lines 30 42) no Hoare annotation was computed. [2023-04-02 23:34:33,400 INFO L895 garLoopResultBuilder]: At program point L31(line 31) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1)) (.cse1 (<= main_~n~0 2)) (.cse2 (<= 0 main_~n~0))) (or (not (= (select .cse0 0) 48)) (not (= |#NULL.offset| 0)) (not (= 2 (select |#length| 1))) (and (= main_~a~0 0) .cse1 (= main_~t~0 1) (= main_~s~0 1) .cse2) (not (= (select |#valid| 3) 1)) (not (= (select |#length| 3) 12)) (not (= (select |#valid| 0) 0)) (not (= (select .cse0 1) 0)) (not (= (select |#valid| 1) 1)) (not (= |#NULL.base| 0)) (and .cse1 (= main_~a~0 1) .cse2 (= main_~s~0 4) (= main_~t~0 3)) (not (= (select |#valid| 2) 1)) (<= |#StackHeapBarrier| 0) (not (= 11 (select |#length| 2))))) [2023-04-02 23:34:33,401 INFO L895 garLoopResultBuilder]: At program point L31-1(line 31) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1)) (.cse1 (<= main_~n~0 2)) (.cse2 (<= 0 main_~n~0))) (or (not (= (select .cse0 0) 48)) (not (= |#NULL.offset| 0)) (not (= 2 (select |#length| 1))) (and (= main_~a~0 0) .cse1 (= main_~t~0 1) (= main_~s~0 1) .cse2) (not (= (select |#valid| 3) 1)) (not (= (select |#length| 3) 12)) (not (= (select |#valid| 0) 0)) (not (= (select .cse0 1) 0)) (not (= (select |#valid| 1) 1)) (not (= |#NULL.base| 0)) (and .cse1 (= main_~a~0 1) .cse2 (= main_~s~0 4) (= main_~t~0 3)) (not (= (select |#valid| 2) 1)) (<= |#StackHeapBarrier| 0) (not (= 11 (select |#length| 2))))) [2023-04-02 23:34:33,401 INFO L899 garLoopResultBuilder]: For program point mainEXIT(lines 20 49) no Hoare annotation was computed. [2023-04-02 23:34:33,401 INFO L899 garLoopResultBuilder]: For program point L46(line 46) no Hoare annotation was computed. [2023-04-02 23:34:33,401 INFO L895 garLoopResultBuilder]: At program point L44(line 44) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1)) (.cse1 (<= main_~n~0 2)) (.cse2 (<= 0 main_~n~0))) (or (not (= (select .cse0 0) 48)) (not (= |#NULL.offset| 0)) (not (= 2 (select |#length| 1))) (and (= main_~a~0 0) .cse1 (= main_~t~0 1) (= main_~s~0 1) .cse2) (not (= (select |#valid| 3) 1)) (not (= (select |#length| 3) 12)) (not (= (select |#valid| 0) 0)) (not (= (select .cse0 1) 0)) (not (= (select |#valid| 1) 1)) (not (= |#NULL.base| 0)) (and .cse1 (= main_~a~0 1) .cse2 (= main_~s~0 4) (= main_~t~0 3)) (not (= (select |#valid| 2) 1)) (<= |#StackHeapBarrier| 0) (not (= 11 (select |#length| 2))))) [2023-04-02 23:34:33,401 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 20 49) the Hoare annotation is: true [2023-04-02 23:34:33,401 INFO L895 garLoopResultBuilder]: At program point L32(line 32) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1)) (.cse1 (<= main_~n~0 2)) (.cse2 (<= 0 main_~n~0))) (or (not (= (select .cse0 0) 48)) (not (= |#NULL.offset| 0)) (not (= 2 (select |#length| 1))) (and (= main_~a~0 0) .cse1 (= main_~t~0 1) (= main_~s~0 1) .cse2) (not (= (select |#valid| 3) 1)) (not (= (select |#length| 3) 12)) (not (= (select |#valid| 0) 0)) (not (= (select .cse0 1) 0)) (not (= (select |#valid| 1) 1)) (not (= |#NULL.base| 0)) (and .cse1 (= main_~a~0 1) .cse2 (= main_~s~0 4) (= main_~t~0 3)) (not (= (select |#valid| 2) 1)) (<= |#StackHeapBarrier| 0) (not (= 11 (select |#length| 2))))) [2023-04-02 23:34:33,401 INFO L895 garLoopResultBuilder]: At program point L30-2(lines 30 42) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1)) (.cse1 (<= main_~n~0 2)) (.cse2 (<= 0 main_~n~0))) (or (not (= (select .cse0 0) 48)) (not (= |#NULL.offset| 0)) (not (= 2 (select |#length| 1))) (and (= main_~a~0 0) .cse1 (= main_~t~0 1) (= main_~s~0 1) .cse2) (not (= (select |#valid| 3) 1)) (not (= (select |#length| 3) 12)) (not (= (select |#valid| 0) 0)) (not (= (select .cse0 1) 0)) (not (= (select |#valid| 1) 1)) (not (= |#NULL.base| 0)) (and .cse1 (= main_~a~0 1) .cse2 (= main_~s~0 4) (= main_~t~0 3)) (not (= (select |#valid| 2) 1)) (<= |#StackHeapBarrier| 0) (not (= 11 (select |#length| 2))))) [2023-04-02 23:34:33,402 INFO L895 garLoopResultBuilder]: At program point L30-3(lines 30 42) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1)) (.cse1 (<= main_~n~0 2)) (.cse2 (<= 0 main_~n~0))) (or (not (= (select .cse0 0) 48)) (not (= |#NULL.offset| 0)) (not (= 2 (select |#length| 1))) (and (= main_~a~0 0) .cse1 (= main_~t~0 1) (= main_~s~0 1) .cse2) (not (= (select |#valid| 3) 1)) (not (= (select |#length| 3) 12)) (not (= (select |#valid| 0) 0)) (not (= (select .cse0 1) 0)) (not (= (select |#valid| 1) 1)) (not (= |#NULL.base| 0)) (and .cse1 (= main_~a~0 1) .cse2 (= main_~s~0 4) (= main_~t~0 3)) (not (= (select |#valid| 2) 1)) (<= |#StackHeapBarrier| 0) (not (= 11 (select |#length| 2))))) [2023-04-02 23:34:33,402 INFO L895 garLoopResultBuilder]: At program point L24(line 24) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (or (not (= (select .cse0 0) 48)) (not (= |#NULL.offset| 0)) (not (= 2 (select |#length| 1))) (not (= (select |#valid| 3) 1)) (not (= (select |#length| 3) 12)) (not (= (select |#valid| 0) 0)) (not (= (select .cse0 1) 0)) (not (= (select |#valid| 1) 1)) (not (= |#NULL.base| 0)) (not (= (select |#valid| 2) 1)) (<= |#StackHeapBarrier| 0) (and (<= main_~n~0 2147483647) (<= 0 (+ main_~n~0 2147483648))) (not (= 11 (select |#length| 2))))) [2023-04-02 23:34:33,402 INFO L899 garLoopResultBuilder]: For program point L24-1(line 24) no Hoare annotation was computed. [2023-04-02 23:34:33,402 INFO L895 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1)) (.cse1 (<= main_~n~0 2)) (.cse2 (<= 0 main_~n~0))) (or (not (= (select .cse0 0) 48)) (not (= |#NULL.offset| 0)) (not (= 2 (select |#length| 1))) (and (= main_~a~0 0) .cse1 (= main_~t~0 1) (= main_~s~0 1) .cse2) (not (= (select |#valid| 3) 1)) (not (= (select |#length| 3) 12)) (not (= (select |#valid| 0) 0)) (not (= (select .cse0 1) 0)) (not (= (select |#valid| 1) 1)) (not (= |#NULL.base| 0)) (and .cse1 (= main_~a~0 1) .cse2 (= main_~s~0 4) (= main_~t~0 3)) (not (= (select |#valid| 2) 1)) (<= |#StackHeapBarrier| 0) (not (= 11 (select |#length| 2))))) [2023-04-02 23:34:33,402 INFO L895 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2023-04-02 23:34:33,402 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2023-04-02 23:34:33,402 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-04-02 23:34:33,402 INFO L895 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (and (= (select |#length| 3) 12) (= 11 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select .cse0 0) 48) (= (select .cse0 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) [2023-04-02 23:34:33,403 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-04-02 23:34:33,403 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: true [2023-04-02 23:34:33,403 INFO L899 garLoopResultBuilder]: For program point L13(lines 13 14) no Hoare annotation was computed. [2023-04-02 23:34:33,403 INFO L899 garLoopResultBuilder]: For program point L12(lines 12 15) no Hoare annotation was computed. [2023-04-02 23:34:33,403 INFO L899 garLoopResultBuilder]: For program point L12-2(lines 11 17) no Hoare annotation was computed. [2023-04-02 23:34:33,403 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2023-04-02 23:34:33,403 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 11 17) the Hoare annotation is: true [2023-04-02 23:34:33,403 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2023-04-02 23:34:33,406 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2023-04-02 23:34:33,407 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-02 23:34:33,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.04 11:34:33 BoogieIcfgContainer [2023-04-02 23:34:33,419 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-02 23:34:33,420 INFO L158 Benchmark]: Toolchain (without parser) took 8271.71ms. Allocated memory was 184.5MB in the beginning and 368.1MB in the end (delta: 183.5MB). Free memory was 139.5MB in the beginning and 326.2MB in the end (delta: -186.7MB). Peak memory consumption was 199.3MB. Max. memory is 8.0GB. [2023-04-02 23:34:33,420 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 184.5MB. Free memory is still 138.5MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-02 23:34:33,420 INFO L158 Benchmark]: CACSL2BoogieTranslator took 229.33ms. Allocated memory is still 184.5MB. Free memory was 139.1MB in the beginning and 128.7MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-04-02 23:34:33,421 INFO L158 Benchmark]: Boogie Preprocessor took 22.45ms. Allocated memory is still 184.5MB. Free memory was 128.7MB in the beginning and 127.4MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-04-02 23:34:33,421 INFO L158 Benchmark]: RCFGBuilder took 244.50ms. Allocated memory is still 184.5MB. Free memory was 127.4MB in the beginning and 115.5MB in the end (delta: 11.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-04-02 23:34:33,421 INFO L158 Benchmark]: TraceAbstraction took 7771.13ms. Allocated memory was 184.5MB in the beginning and 368.1MB in the end (delta: 183.5MB). Free memory was 114.8MB in the beginning and 326.2MB in the end (delta: -211.4MB). Peak memory consumption was 175.2MB. Max. memory is 8.0GB. [2023-04-02 23:34:33,422 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 184.5MB. Free memory is still 138.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 229.33ms. Allocated memory is still 184.5MB. Free memory was 139.1MB in the beginning and 128.7MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 22.45ms. Allocated memory is still 184.5MB. Free memory was 128.7MB in the beginning and 127.4MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 244.50ms. Allocated memory is still 184.5MB. Free memory was 127.4MB in the beginning and 115.5MB in the end (delta: 11.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 7771.13ms. Allocated memory was 184.5MB in the beginning and 368.1MB in the end (delta: 183.5MB). Free memory was 114.8MB in the beginning and 326.2MB in the end (delta: -211.4MB). Peak memory consumption was 175.2MB. 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 - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7.7s, OverallIterations: 5, TraceHistogramMax: 9, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 89 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 72 mSDsluCounter, 325 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 234 mSDsCounter, 85 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 521 IncrementalHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 85 mSolverCounterUnsat, 91 mSDtfsCounter, 521 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 415 GetRequests, 330 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=53occurred in iteration=4, InterpolantAutomatonStates: 40, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 14 LocationsWithAnnotation, 37 PreInvPairs, 51 NumberOfFragments, 863 HoareAnnotationTreeSize, 37 FomulaSimplifications, 141 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 14 FomulaSimplificationsInter, 1467 FormulaSimplificationTreeSizeReductionInter, 0.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 158 NumberOfCodeBlocks, 146 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 293 ConstructedInterpolants, 0 QuantifiedInterpolants, 894 SizeOfPredicates, 9 NumberOfNonLiveVariables, 395 ConjunctsInSsa, 64 ConjunctsInUnsatCore, 9 InterpolantComputations, 2 PerfectInterpolantSequences, 377/396 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: OVERALL_TIME: 0.3s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 5, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 17, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 14, TOOLS_POST_TIME: 0.0s, TOOLS_POST_CALL_APPLICATIONS: 11, TOOLS_POST_CALL_TIME: 0.1s, TOOLS_POST_RETURN_APPLICATIONS: 6, TOOLS_POST_RETURN_TIME: 0.1s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 31, TOOLS_QUANTIFIERELIM_TIME: 0.2s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.0s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 52, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 7, DOMAIN_JOIN_TIME: 0.0s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 17, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 6, CALL_SUMMARIZER_CACHE_MISSES: 3, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 110, DAG_COMPRESSION_RETAINED_NODES: 60, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: ((((((((((((!(unknown-#memory_int-unknown[1][0] == 48) || !(#NULL == 0)) || !(2 == unknown-#length-unknown[1])) || ((((a == 0 && n <= 2) && t == 1) && s == 1) && 0 <= n)) || !(\valid[3] == 1)) || !(unknown-#length-unknown[3] == 12)) || !(\valid[0] == 0)) || !(unknown-#memory_int-unknown[1][1] == 0)) || !(\valid[1] == 1)) || !(#NULL == 0)) || ((((n <= 2 && a == 1) && 0 <= n) && s == 4) && t == 3)) || !(\valid[2] == 1)) || unknown-#StackHeapBarrier-unknown <= 0) || !(11 == unknown-#length-unknown[2]) RESULT: Ultimate proved your program to be correct! [2023-04-02 23:34:33,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...