/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 EqDomain -i ../sv-benchmarks/c/loop-crafted/simple_array_index_value_2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 11:04:45,631 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 11:04:45,633 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 11:04:45,669 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 11:04:45,670 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 11:04:45,672 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 11:04:45,675 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 11:04:45,677 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 11:04:45,680 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 11:04:45,685 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 11:04:45,686 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 11:04:45,688 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 11:04:45,688 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 11:04:45,691 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 11:04:45,691 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 11:04:45,692 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 11:04:45,693 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 11:04:45,694 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 11:04:45,696 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 11:04:45,700 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 11:04:45,701 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 11:04:45,702 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 11:04:45,703 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 11:04:45,704 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 11:04:45,712 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 11:04:45,715 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 11:04:45,715 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 11:04:45,716 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 11:04:45,717 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 11:04:45,717 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 11:04:45,718 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 11:04:45,718 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 11:04:45,718 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 11:04:45,718 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 11:04:45,719 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 11:04:45,720 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 11:04:45,721 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 [2023-04-01 11:04:45,748 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 11:04:45,748 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 11:04:45,748 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 11:04:45,749 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 11:04:45,749 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 11:04:45,749 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 11:04:45,750 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 11:04:45,750 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 11:04:45,750 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 11:04:45,750 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 11:04:45,751 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 11:04:45,751 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 11:04:45,751 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 11:04:45,751 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 11:04:45,751 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 11:04:45,752 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 11:04:45,752 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 11:04:45,752 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 11:04:45,752 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 11:04:45,752 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 11:04:45,753 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 11:04:45,753 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 11:04:45,753 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 11:04:45,753 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 11:04:45,753 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 11:04:45,753 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 11:04:45,754 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 11:04:45,754 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 11:04:45,754 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 11:04:45,754 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 11:04:45,754 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 11:04:45,755 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 11:04:45,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:04:45,755 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 11:04:45,755 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 11:04:45,755 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 11:04:45,755 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 11:04:45,755 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 11:04:45,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 11:04:45,756 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 11:04:45,756 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 11:04:45,756 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 11:04:45,947 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 11:04:45,971 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 11:04:45,973 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 11:04:45,974 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 11:04:45,974 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 11:04:45,975 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-crafted/simple_array_index_value_2.i [2023-04-01 11:04:47,059 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 11:04:47,283 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 11:04:47,284 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-crafted/simple_array_index_value_2.i [2023-04-01 11:04:47,289 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a99be5bc1/80d72a3773d74b98bbedb02e811c42db/FLAGb7dcb629f [2023-04-01 11:04:47,305 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a99be5bc1/80d72a3773d74b98bbedb02e811c42db [2023-04-01 11:04:47,307 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 11:04:47,309 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 11:04:47,312 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 11:04:47,312 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 11:04:47,314 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 11:04:47,315 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:04:47" (1/1) ... [2023-04-01 11:04:47,316 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e607fe4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:04:47, skipping insertion in model container [2023-04-01 11:04:47,317 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:04:47" (1/1) ... [2023-04-01 11:04:47,322 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 11:04:47,340 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 11:04:47,479 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/loop-crafted/simple_array_index_value_2.i[919,932] [2023-04-01 11:04:47,490 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:04:47,497 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 11:04:47,506 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/loop-crafted/simple_array_index_value_2.i[919,932] [2023-04-01 11:04:47,509 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:04:47,519 INFO L208 MainTranslator]: Completed translation [2023-04-01 11:04:47,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:04:47 WrapperNode [2023-04-01 11:04:47,519 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 11:04:47,520 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 11:04:47,520 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 11:04:47,520 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 11:04:47,529 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:04:47" (1/1) ... [2023-04-01 11:04:47,529 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:04:47" (1/1) ... [2023-04-01 11:04:47,534 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:04:47" (1/1) ... [2023-04-01 11:04:47,535 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:04:47" (1/1) ... [2023-04-01 11:04:47,539 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:04:47" (1/1) ... [2023-04-01 11:04:47,542 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:04:47" (1/1) ... [2023-04-01 11:04:47,543 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:04:47" (1/1) ... [2023-04-01 11:04:47,543 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:04:47" (1/1) ... [2023-04-01 11:04:47,545 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 11:04:47,546 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 11:04:47,546 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 11:04:47,546 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 11:04:47,546 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:04:47" (1/1) ... [2023-04-01 11:04:47,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:04:47,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:04:47,578 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) [2023-04-01 11:04:47,579 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 [2023-04-01 11:04:47,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 11:04:47,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 11:04:47,608 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 11:04:47,608 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 11:04:47,608 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 11:04:47,608 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 11:04:47,608 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 11:04:47,608 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 11:04:47,608 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 11:04:47,608 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 11:04:47,609 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 11:04:47,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 11:04:47,609 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 11:04:47,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 11:04:47,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-04-01 11:04:47,609 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 11:04:47,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 11:04:47,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 11:04:47,609 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 11:04:47,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 11:04:47,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 11:04:47,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 11:04:47,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 11:04:47,697 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 11:04:47,699 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 11:04:47,886 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 11:04:47,933 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 11:04:47,934 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 11:04:47,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:04:47 BoogieIcfgContainer [2023-04-01 11:04:47,936 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 11:04:47,939 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 11:04:47,939 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 11:04:47,942 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 11:04:47,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:04:47" (1/3) ... [2023-04-01 11:04:47,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1962efb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:04:47, skipping insertion in model container [2023-04-01 11:04:47,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:04:47" (2/3) ... [2023-04-01 11:04:47,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1962efb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:04:47, skipping insertion in model container [2023-04-01 11:04:47,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:04:47" (3/3) ... [2023-04-01 11:04:47,944 INFO L112 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_2.i [2023-04-01 11:04:47,959 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 11:04:47,959 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 11:04:48,013 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 11:04:48,021 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;@2f5ad578, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 11:04:48,021 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 11:04:48,025 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 11:04:48,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 11:04:48,032 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:04:48,032 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:04:48,033 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:04:48,039 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:04:48,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1440118444, now seen corresponding path program 1 times [2023-04-01 11:04:48,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:04:48,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557421470] [2023-04-01 11:04:48,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:04:48,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:04:48,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:04:48,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:04:48,339 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:04:48,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557421470] [2023-04-01 11:04:48,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557421470] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:04:48,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:04:48,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 11:04:48,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936586294] [2023-04-01 11:04:48,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:04:48,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 11:04:48,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:04:48,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 11:04:48,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 11:04:48,373 INFO L87 Difference]: Start difference. First operand has 22 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2023-04-01 11:04:48,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:04:48,415 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2023-04-01 11:04:48,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 11:04:48,417 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 11 [2023-04-01 11:04:48,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:04:48,423 INFO L225 Difference]: With dead ends: 40 [2023-04-01 11:04:48,423 INFO L226 Difference]: Without dead ends: 25 [2023-04-01 11:04:48,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 11:04:48,429 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:04:48,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 27 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:04:48,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-04-01 11:04:48,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2023-04-01 11:04:48,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 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) [2023-04-01 11:04:48,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2023-04-01 11:04:48,460 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 11 [2023-04-01 11:04:48,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:04:48,461 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2023-04-01 11:04:48,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2023-04-01 11:04:48,461 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2023-04-01 11:04:48,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-01 11:04:48,462 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:04:48,462 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:04:48,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 11:04:48,462 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:04:48,463 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:04:48,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1650919387, now seen corresponding path program 1 times [2023-04-01 11:04:48,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:04:48,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228479206] [2023-04-01 11:04:48,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:04:48,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:04:48,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:04:48,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:04:48,640 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:04:48,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228479206] [2023-04-01 11:04:48,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228479206] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:04:48,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060439604] [2023-04-01 11:04:48,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:04:48,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:04:48,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:04:48,644 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) [2023-04-01 11:04:48,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 11:04:48,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:04:48,725 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 23 conjunts are in the unsatisfiable core [2023-04-01 11:04:48,731 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:04:48,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-04-01 11:04:48,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-04-01 11:04:49,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:04:49,013 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:04:49,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 40 [2023-04-01 11:04:49,165 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:04:49,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 87 [2023-04-01 11:04:49,239 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:04:49,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 58 [2023-04-01 11:04:49,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:04:49,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060439604] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:04:49,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [250353557] [2023-04-01 11:04:49,522 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 11:04:49,522 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:04:49,526 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:04:49,530 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:04:49,530 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:04:49,631 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:04:50,468 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 68 for LOIs [2023-04-01 11:04:50,519 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-04-01 11:04:50,533 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:04:50,538 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:04:51,646 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '227#(and (exists ((|v_old(#valid)_BEFORE_CALL_9| (Array Int Int)) (|v_main_~#array~0.base_BEFORE_CALL_9| Int) (|v_old(#length)_BEFORE_CALL_9| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_9| (Array Int (Array Int Int)))) (and (= (select |v_old(#valid)_BEFORE_CALL_9| 1) 1) (not (= |v_main_~#array~0.base_BEFORE_CALL_9| 1)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_9| 1) 1) 0) (not (= |v_main_~#array~0.base_BEFORE_CALL_9| |#StackHeapBarrier|)) (<= (mod (select (select |#memory_int| |v_main_~#array~0.base_BEFORE_CALL_9|) 0) 4294967296) 0) (= (select |v_old(#valid)_BEFORE_CALL_9| 2) 1) (= 29 (select |v_old(#length)_BEFORE_CALL_9| 2)) (= (select |v_old(#valid)_BEFORE_CALL_9| |v_main_~#array~0.base_BEFORE_CALL_9|) 0) (= (select |v_old(#valid)_BEFORE_CALL_9| 0) 0) (not (= |v_old(#length)_BEFORE_CALL_9| (select |v_old(#memory_int)_BEFORE_CALL_9| 1))) (not (= |v_old(#valid)_BEFORE_CALL_9| (select |v_old(#memory_int)_BEFORE_CALL_9| 1))) (not (= |v_old(#valid)_BEFORE_CALL_9| |v_old(#length)_BEFORE_CALL_9|)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_9| 1) 0)) (not (= |v_main_~#array~0.base_BEFORE_CALL_9| 0)) (not (= |v_main_~#array~0.base_BEFORE_CALL_9| 2)) (= (select |v_old(#length)_BEFORE_CALL_9| 1) 2))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:04:51,646 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:04:51,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:04:51,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 10, 11] total 18 [2023-04-01 11:04:51,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838544884] [2023-04-01 11:04:51,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 11:04:51,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 11:04:51,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:04:51,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 11:04:51,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=827, Unknown=1, NotChecked=0, Total=930 [2023-04-01 11:04:51,651 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 18 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 6 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 11:04:51,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:04:51,826 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2023-04-01 11:04:51,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 11:04:51,827 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 6 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 16 [2023-04-01 11:04:51,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:04:51,830 INFO L225 Difference]: With dead ends: 40 [2023-04-01 11:04:51,830 INFO L226 Difference]: Without dead ends: 31 [2023-04-01 11:04:51,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=107, Invalid=884, Unknown=1, NotChecked=0, Total=992 [2023-04-01 11:04:51,835 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:04:51,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 104 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:04:51,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-04-01 11:04:51,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2023-04-01 11:04:51,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 11:04:51,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2023-04-01 11:04:51,840 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 16 [2023-04-01 11:04:51,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:04:51,842 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2023-04-01 11:04:51,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 6 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 11:04:51,842 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2023-04-01 11:04:51,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 11:04:51,844 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:04:51,844 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:04:51,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 11:04:52,065 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 [2023-04-01 11:04:52,065 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:04:52,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:04:52,065 INFO L85 PathProgramCache]: Analyzing trace with hash 826705332, now seen corresponding path program 2 times [2023-04-01 11:04:52,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:04:52,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248452500] [2023-04-01 11:04:52,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:04:52,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:04:52,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:04:52,260 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 11:04:52,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:04:52,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248452500] [2023-04-01 11:04:52,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248452500] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:04:52,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791267387] [2023-04-01 11:04:52,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 11:04:52,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:04:52,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:04:52,269 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) [2023-04-01 11:04:52,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 11:04:52,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 11:04:52,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 11:04:52,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 33 conjunts are in the unsatisfiable core [2023-04-01 11:04:52,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:04:52,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-04-01 11:04:52,493 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2023-04-01 11:04:52,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 36 [2023-04-01 11:04:52,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-04-01 11:04:52,614 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 11:04:52,614 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:04:56,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791267387] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:04:56,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [317802633] [2023-04-01 11:04:56,853 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 11:04:56,853 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:04:56,854 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:04:56,854 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:04:56,854 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:04:56,882 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:04:57,333 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 68 for LOIs [2023-04-01 11:04:57,361 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2023-04-01 11:04:57,370 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:04:57,373 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:04:58,421 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '445#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (exists ((|v_main_~#array~0.base_BEFORE_CALL_20| Int) (|v_old(#length)_BEFORE_CALL_19| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_19| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_19| (Array Int Int))) (and (= (select (select |v_old(#memory_int)_BEFORE_CALL_19| 1) 0) 48) (not (= (select |v_old(#memory_int)_BEFORE_CALL_19| 1) |v_old(#valid)_BEFORE_CALL_19|)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_19| 1) |v_old(#length)_BEFORE_CALL_19|)) (= (select |v_old(#valid)_BEFORE_CALL_19| 0) 0) (not (= |v_main_~#array~0.base_BEFORE_CALL_20| 0)) (not (= 2 |v_main_~#array~0.base_BEFORE_CALL_20|)) (= (select |v_old(#length)_BEFORE_CALL_19| 1) 2) (= 29 (select |v_old(#length)_BEFORE_CALL_19| 2)) (= (select |v_old(#valid)_BEFORE_CALL_19| 2) 1) (not (= |#StackHeapBarrier| |v_main_~#array~0.base_BEFORE_CALL_20|)) (not (= |v_main_~#array~0.base_BEFORE_CALL_20| 1)) (= (select |v_old(#valid)_BEFORE_CALL_19| |v_main_~#array~0.base_BEFORE_CALL_20|) 0) (= 1 (select |v_old(#valid)_BEFORE_CALL_19| 1)) (not (= |v_old(#valid)_BEFORE_CALL_19| |v_old(#length)_BEFORE_CALL_19|)) (<= (mod (select (select |#memory_int| |v_main_~#array~0.base_BEFORE_CALL_20|) 0) 4294967296) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_19| 1) 1) 0))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:04:58,421 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:04:58,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:04:58,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 14] total 16 [2023-04-01 11:04:58,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362337614] [2023-04-01 11:04:58,422 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 11:04:58,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 11:04:58,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:04:58,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 11:04:58,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1067, Unknown=3, NotChecked=0, Total=1190 [2023-04-01 11:04:58,424 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 16 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 6 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-04-01 11:04:58,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:04:58,856 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2023-04-01 11:04:58,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-01 11:04:58,856 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 6 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 21 [2023-04-01 11:04:58,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:04:58,857 INFO L225 Difference]: With dead ends: 52 [2023-04-01 11:04:58,857 INFO L226 Difference]: Without dead ends: 43 [2023-04-01 11:04:58,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=204, Invalid=1685, Unknown=3, NotChecked=0, Total=1892 [2023-04-01 11:04:58,859 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 34 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 11:04:58,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 55 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 11:04:58,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-04-01 11:04:58,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2023-04-01 11:04:58,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 23 states have internal predecessors, (24), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 11:04:58,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2023-04-01 11:04:58,868 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 21 [2023-04-01 11:04:58,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:04:58,869 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2023-04-01 11:04:58,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 6 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-04-01 11:04:58,869 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2023-04-01 11:04:58,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-01 11:04:58,870 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:04:58,870 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:04:58,876 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-01 11:04:59,075 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 [2023-04-01 11:04:59,076 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:04:59,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:04:59,076 INFO L85 PathProgramCache]: Analyzing trace with hash -596585983, now seen corresponding path program 1 times [2023-04-01 11:04:59,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:04:59,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900476584] [2023-04-01 11:04:59,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:04:59,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:04:59,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:04:59,249 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 11:04:59,249 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:04:59,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900476584] [2023-04-01 11:04:59,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900476584] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:04:59,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29655269] [2023-04-01 11:04:59,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:04:59,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:04:59,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:04:59,251 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) [2023-04-01 11:04:59,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 11:04:59,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:04:59,312 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 52 conjunts are in the unsatisfiable core [2023-04-01 11:04:59,317 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:04:59,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 44 [2023-04-01 11:04:59,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 86 [2023-04-01 11:04:59,709 INFO L321 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2023-04-01 11:04:59,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2023-04-01 11:05:00,118 INFO L321 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2023-04-01 11:05:00,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2023-04-01 11:05:00,693 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-04-01 11:05:00,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 12 [2023-04-01 11:05:00,761 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 11:05:00,761 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:05:07,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29655269] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:05:07,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [564582339] [2023-04-01 11:05:07,444 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 11:05:07,444 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:05:07,445 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:05:07,445 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:05:07,445 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:05:07,468 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:05:08,052 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 69 for LOIs [2023-04-01 11:05:08,097 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 67 for LOIs [2023-04-01 11:05:08,105 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:05:08,108 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:05:13,358 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '799#(and (exists ((|v_old(#length)_BEFORE_CALL_36| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_36| (Array Int (Array Int Int))) (v_main_~index~0_BEFORE_CALL_49 Int) (|v_old(#valid)_BEFORE_CALL_36| (Array Int Int)) (|v_main_~#array~0.base_BEFORE_CALL_41| Int)) (and (not (= |v_main_~#array~0.base_BEFORE_CALL_41| 0)) (not (= |#StackHeapBarrier| |v_main_~#array~0.base_BEFORE_CALL_41|)) (not (= |v_main_~#array~0.base_BEFORE_CALL_41| 1)) (not (= |v_old(#valid)_BEFORE_CALL_36| (select |v_old(#memory_int)_BEFORE_CALL_36| 1))) (not (= 2 |v_main_~#array~0.base_BEFORE_CALL_41|)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_36| 1) |v_old(#length)_BEFORE_CALL_36|)) (= (select |v_old(#valid)_BEFORE_CALL_36| 2) 1) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_36| 1) 0)) (<= (mod (select (select |#memory_int| |v_main_~#array~0.base_BEFORE_CALL_41|) (* (mod v_main_~index~0_BEFORE_CALL_49 4294967296) 4)) 4294967296) (mod v_main_~index~0_BEFORE_CALL_49 4294967296)) (not (= |v_old(#valid)_BEFORE_CALL_36| |v_old(#length)_BEFORE_CALL_36|)) (= (select |v_old(#valid)_BEFORE_CALL_36| 1) 1) (< (mod v_main_~index~0_BEFORE_CALL_49 4294967296) 10000) (= 29 (select |v_old(#length)_BEFORE_CALL_36| 2)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_36| 1) 1) 0) (= (select |v_old(#valid)_BEFORE_CALL_36| |v_main_~#array~0.base_BEFORE_CALL_41|) 0) (= 2 (select |v_old(#length)_BEFORE_CALL_36| 1)) (= (select |v_old(#valid)_BEFORE_CALL_36| 0) 0))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:05:13,358 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:05:13,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 11:05:13,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 18] total 21 [2023-04-01 11:05:13,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6290845] [2023-04-01 11:05:13,359 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 11:05:13,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-01 11:05:13,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:05:13,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-01 11:05:13,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1978, Unknown=4, NotChecked=0, Total=2162 [2023-04-01 11:05:13,362 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 21 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 9 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-01 11:05:15,552 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 11:05:17,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 11:05:20,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 11:05:23,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 11:05:24,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 11:05:25,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:05:25,706 INFO L93 Difference]: Finished difference Result 82 states and 92 transitions. [2023-04-01 11:05:25,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-01 11:05:25,707 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 9 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 38 [2023-04-01 11:05:25,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:05:25,708 INFO L225 Difference]: With dead ends: 82 [2023-04-01 11:05:25,708 INFO L226 Difference]: Without dead ends: 67 [2023-04-01 11:05:25,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 45 SyntacticMatches, 7 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 897 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=289, Invalid=2899, Unknown=4, NotChecked=0, Total=3192 [2023-04-01 11:05:25,710 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 47 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 41 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.9s IncrementalHoareTripleChecker+Time [2023-04-01 11:05:25,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 75 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 376 Invalid, 6 Unknown, 0 Unchecked, 11.9s Time] [2023-04-01 11:05:25,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-04-01 11:05:25,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2023-04-01 11:05:25,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 32 states have (on average 1.0625) internal successors, (34), 33 states have internal predecessors, (34), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 11:05:25,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2023-04-01 11:05:25,724 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 38 [2023-04-01 11:05:25,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:05:25,724 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2023-04-01 11:05:25,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 9 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-01 11:05:25,725 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2023-04-01 11:05:25,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-01 11:05:25,726 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:05:25,726 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:05:25,734 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-01 11:05:25,934 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 [2023-04-01 11:05:25,934 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:05:25,935 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:05:25,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1903552044, now seen corresponding path program 2 times [2023-04-01 11:05:25,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:05:25,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787777344] [2023-04-01 11:05:25,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:05:25,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:05:25,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:05:26,157 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 4 proven. 51 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-04-01 11:05:26,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:05:26,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787777344] [2023-04-01 11:05:26,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787777344] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:05:26,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612490555] [2023-04-01 11:05:26,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 11:05:26,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:05:26,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:05:26,159 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) [2023-04-01 11:05:26,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 11:05:26,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-04-01 11:05:26,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 11:05:26,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 63 conjunts are in the unsatisfiable core [2023-04-01 11:05:26,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:05:26,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 48 [2023-04-01 11:05:26,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 78 [2023-04-01 11:05:28,155 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2023-04-01 11:05:28,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 53 [2023-04-01 11:05:48,355 INFO L321 Elim1Store]: treesize reduction 187, result has 44.5 percent of original size [2023-04-01 11:05:48,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 145 treesize of output 216