/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/array-fpi/ms4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 03:02:53,580 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 03:02:53,581 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 03:02:53,615 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 03:02:53,616 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 03:02:53,619 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 03:02:53,624 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 03:02:53,626 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 03:02:53,628 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 03:02:53,634 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 03:02:53,636 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 03:02:53,637 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 03:02:53,638 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 03:02:53,643 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 03:02:53,644 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 03:02:53,645 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 03:02:53,646 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 03:02:53,647 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 03:02:53,650 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 03:02:53,656 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 03:02:53,658 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 03:02:53,659 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 03:02:53,661 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 03:02:53,662 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 03:02:53,666 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 03:02:53,666 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 03:02:53,666 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 03:02:53,668 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 03:02:53,668 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 03:02:53,669 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 03:02:53,669 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 03:02:53,670 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 03:02:53,671 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 03:02:53,672 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 03:02:53,673 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 03:02:53,673 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 03:02:53,673 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 03:02:53,673 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 03:02:53,674 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 03:02:53,674 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 03:02:53,675 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 03:02:53,676 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 03:02:53,708 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 03:02:53,708 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 03:02:53,709 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 03:02:53,709 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 03:02:53,710 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 03:02:53,710 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 03:02:53,710 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 03:02:53,710 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 03:02:53,710 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 03:02:53,711 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 03:02:53,711 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 03:02:53,711 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 03:02:53,712 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 03:02:53,712 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 03:02:53,712 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 03:02:53,712 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 03:02:53,712 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 03:02:53,712 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 03:02:53,713 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 03:02:53,713 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 03:02:53,713 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 03:02:53,713 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 03:02:53,713 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 03:02:53,713 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 03:02:53,714 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 03:02:53,714 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 03:02:53,714 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 03:02:53,714 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 03:02:53,714 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 03:02:53,714 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 03:02:53,714 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 03:02:53,715 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 03:02:53,715 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:02:53,715 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 03:02:53,715 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 03:02:53,715 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 03:02:53,715 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 03:02:53,715 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 03:02:53,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 03:02:53,716 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 03:02:53,716 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 03:02:53,716 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 03:02:53,936 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 03:02:53,955 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 03:02:53,958 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 03:02:53,959 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 03:02:53,960 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 03:02:53,961 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/ms4.c [2023-04-01 03:02:55,157 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 03:02:55,419 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 03:02:55,419 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ms4.c [2023-04-01 03:02:55,424 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed256fa43/993502071dbc4024a3fd35b5a4711d35/FLAG843c38f95 [2023-04-01 03:02:55,438 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed256fa43/993502071dbc4024a3fd35b5a4711d35 [2023-04-01 03:02:55,442 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 03:02:55,444 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 03:02:55,446 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 03:02:55,446 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 03:02:55,449 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 03:02:55,449 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:02:55" (1/1) ... [2023-04-01 03:02:55,451 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1835dd0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:02:55, skipping insertion in model container [2023-04-01 03:02:55,451 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:02:55" (1/1) ... [2023-04-01 03:02:55,457 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 03:02:55,471 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 03:02:55,591 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/array-fpi/ms4.c[586,599] [2023-04-01 03:02:55,616 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:02:55,630 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 03:02:55,645 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/array-fpi/ms4.c[586,599] [2023-04-01 03:02:55,662 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:02:55,675 INFO L208 MainTranslator]: Completed translation [2023-04-01 03:02:55,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:02:55 WrapperNode [2023-04-01 03:02:55,676 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 03:02:55,677 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 03:02:55,678 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 03:02:55,678 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 03:02:55,690 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:02:55" (1/1) ... [2023-04-01 03:02:55,690 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:02:55" (1/1) ... [2023-04-01 03:02:55,704 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:02:55" (1/1) ... [2023-04-01 03:02:55,705 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:02:55" (1/1) ... [2023-04-01 03:02:55,719 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:02:55" (1/1) ... [2023-04-01 03:02:55,722 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:02:55" (1/1) ... [2023-04-01 03:02:55,723 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:02:55" (1/1) ... [2023-04-01 03:02:55,724 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:02:55" (1/1) ... [2023-04-01 03:02:55,733 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 03:02:55,734 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 03:02:55,735 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 03:02:55,735 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 03:02:55,736 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:02:55" (1/1) ... [2023-04-01 03:02:55,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:02:55,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:02:55,774 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 03:02:55,798 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 03:02:55,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 03:02:55,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 03:02:55,816 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 03:02:55,816 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 03:02:55,816 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 03:02:55,816 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 03:02:55,816 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 03:02:55,817 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 03:02:55,817 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 03:02:55,817 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 03:02:55,817 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 03:02:55,817 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 03:02:55,817 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 03:02:55,817 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 03:02:55,817 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 03:02:55,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 03:02:55,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 03:02:55,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 03:02:55,818 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 03:02:55,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 03:02:55,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 03:02:55,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 03:02:55,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 03:02:55,914 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 03:02:55,917 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 03:02:56,140 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 03:02:56,215 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 03:02:56,215 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 03:02:56,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:02:56 BoogieIcfgContainer [2023-04-01 03:02:56,217 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 03:02:56,219 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 03:02:56,220 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 03:02:56,223 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 03:02:56,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 03:02:55" (1/3) ... [2023-04-01 03:02:56,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b5a7e57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:02:56, skipping insertion in model container [2023-04-01 03:02:56,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:02:55" (2/3) ... [2023-04-01 03:02:56,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b5a7e57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:02:56, skipping insertion in model container [2023-04-01 03:02:56,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:02:56" (3/3) ... [2023-04-01 03:02:56,226 INFO L112 eAbstractionObserver]: Analyzing ICFG ms4.c [2023-04-01 03:02:56,243 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 03:02:56,244 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 03:02:56,288 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 03:02:56,295 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;@43e5b3d9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 03:02:56,295 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 03:02:56,299 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 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 03:02:56,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-01 03:02:56,305 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:02:56,306 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:02:56,307 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:02:56,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:02:56,316 INFO L85 PathProgramCache]: Analyzing trace with hash -2020821576, now seen corresponding path program 1 times [2023-04-01 03:02:56,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:02:56,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674022788] [2023-04-01 03:02:56,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:02:56,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:02:56,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:02:56,728 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 03:02:56,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:02:56,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674022788] [2023-04-01 03:02:56,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674022788] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:02:56,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:02:56,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 03:02:56,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475968294] [2023-04-01 03:02:56,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:02:56,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 03:02:56,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:02:56,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 03:02:56,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 03:02:56,779 INFO L87 Difference]: Start difference. First operand has 24 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 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 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:02:56,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:02:56,882 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2023-04-01 03:02:56,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 03:02:56,884 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2023-04-01 03:02:56,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:02:56,889 INFO L225 Difference]: With dead ends: 43 [2023-04-01 03:02:56,890 INFO L226 Difference]: Without dead ends: 19 [2023-04-01 03:02:56,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 03:02:56,895 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 18 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 03:02:56,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 42 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 03:02:56,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-04-01 03:02:56,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-04-01 03:02:56,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:02:56,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2023-04-01 03:02:56,938 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2023-04-01 03:02:56,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:02:56,938 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2023-04-01 03:02:56,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:02:56,939 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2023-04-01 03:02:56,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 03:02:56,940 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:02:56,940 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:02:56,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 03:02:56,941 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:02:56,942 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:02:56,943 INFO L85 PathProgramCache]: Analyzing trace with hash 358574091, now seen corresponding path program 1 times [2023-04-01 03:02:56,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:02:56,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209723453] [2023-04-01 03:02:56,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:02:56,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:02:56,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:02:57,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 03:02:57,292 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:02:57,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209723453] [2023-04-01 03:02:57,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209723453] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:02:57,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386675224] [2023-04-01 03:02:57,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:02:57,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:02:57,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:02:57,314 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 03:02:57,316 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 03:02:57,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:02:57,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-01 03:02:57,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:02:57,510 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 11 treesize of output 7 [2023-04-01 03:02:57,556 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 15 treesize of output 7 [2023-04-01 03:02:57,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 03:02:57,654 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:02:57,724 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:02:57,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 51 [2023-04-01 03:02:57,739 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 03:02:57,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 8 [2023-04-01 03:02:57,773 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 42 treesize of output 30 [2023-04-01 03:02:57,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 9 treesize of output 7 [2023-04-01 03:02:57,784 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 23 treesize of output 15 [2023-04-01 03:02:57,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 03:02:57,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386675224] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:02:57,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1981533738] [2023-04-01 03:02:57,843 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-01 03:02:57,843 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:02:57,846 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:02:57,850 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:02:57,850 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:02:57,924 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:02:58,185 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-04-01 03:02:58,216 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:02:58,222 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:02:58,234 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:02:59,009 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '241#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_1| Int)) (and (< (* 3 ~N~0) (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_1|) 0)) (<= ~N~0 (+ 2147483645 |v_main_~#sum~0.base_BEFORE_CALL_1|)) (<= 2 |v_main_~#sum~0.base_BEFORE_CALL_1|) (<= 3 (+ ~N~0 |v_main_~#sum~0.base_BEFORE_CALL_1|)) (<= 3 (+ |v_main_~#sum~0.base_BEFORE_CALL_1| |#StackHeapBarrier|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#sum~0.base_BEFORE_CALL_1|))) (= |#NULL.base| 0))' at error location [2023-04-01 03:02:59,010 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:02:59,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 03:02:59,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-04-01 03:02:59,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354978401] [2023-04-01 03:02:59,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 03:02:59,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 03:02:59,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:02:59,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 03:02:59,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2023-04-01 03:02:59,014 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 03:02:59,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:02:59,157 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2023-04-01 03:02:59,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 03:02:59,158 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 18 [2023-04-01 03:02:59,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:02:59,158 INFO L225 Difference]: With dead ends: 25 [2023-04-01 03:02:59,158 INFO L226 Difference]: Without dead ends: 20 [2023-04-01 03:02:59,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=136, Invalid=920, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 03:02:59,160 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 13 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 03:02:59,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 61 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 03:02:59,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-04-01 03:02:59,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-04-01 03:02:59,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:02:59,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2023-04-01 03:02:59,165 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2023-04-01 03:02:59,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:02:59,165 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2023-04-01 03:02:59,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 03:02:59,166 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2023-04-01 03:02:59,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-01 03:02:59,166 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:02:59,166 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:02:59,180 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 03:02:59,380 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 03:02:59,380 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:02:59,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:02:59,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1813973195, now seen corresponding path program 2 times [2023-04-01 03:02:59,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:02:59,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619571893] [2023-04-01 03:02:59,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:02:59,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:02:59,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:02:59,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:02:59,471 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:02:59,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619571893] [2023-04-01 03:02:59,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619571893] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:02:59,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707490163] [2023-04-01 03:02:59,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 03:02:59,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:02:59,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:02:59,473 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 03:02:59,479 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 03:02:59,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 03:02:59,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:02:59,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 03:02:59,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:02:59,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:02:59,623 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:02:59,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:02:59,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707490163] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:02:59,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1628315388] [2023-04-01 03:02:59,659 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-01 03:02:59,659 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:02:59,660 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:02:59,660 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:02:59,660 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:02:59,743 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:02:59,971 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-04-01 03:02:59,993 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:02:59,997 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:03:00,006 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:03:00,589 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '455#(and (<= 1 |#StackHeapBarrier|) (<= ~N~0 2147483647) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_2| Int)) (and (<= 3 (+ |v_main_~#sum~0.base_BEFORE_CALL_2| |#StackHeapBarrier|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#sum~0.base_BEFORE_CALL_2|) (<= 2 |v_main_~#sum~0.base_BEFORE_CALL_2|) (<= 3 (+ ~N~0 |v_main_~#sum~0.base_BEFORE_CALL_2|)) (<= ~N~0 (+ 2147483645 |v_main_~#sum~0.base_BEFORE_CALL_2|)) (< (* 3 ~N~0) (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_2|) 0)))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:03:00,590 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:03:00,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 03:03:00,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2023-04-01 03:03:00,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655320017] [2023-04-01 03:03:00,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 03:03:00,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 03:03:00,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:03:00,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 03:03:00,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2023-04-01 03:03:00,593 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 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) [2023-04-01 03:03:00,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:03:00,638 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2023-04-01 03:03:00,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 03:03:00,638 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 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 19 [2023-04-01 03:03:00,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:03:00,639 INFO L225 Difference]: With dead ends: 29 [2023-04-01 03:03:00,639 INFO L226 Difference]: Without dead ends: 21 [2023-04-01 03:03:00,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2023-04-01 03:03:00,641 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 03:03:00,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 03:03:00,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-01 03:03:00,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-04-01 03:03:00,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 03:03:00,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2023-04-01 03:03:00,645 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2023-04-01 03:03:00,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:03:00,646 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2023-04-01 03:03:00,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 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) [2023-04-01 03:03:00,646 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2023-04-01 03:03:00,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 03:03:00,647 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:03:00,647 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:03:00,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 03:03:00,853 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 03:03:00,854 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:03:00,855 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:03:00,855 INFO L85 PathProgramCache]: Analyzing trace with hash -914074792, now seen corresponding path program 3 times [2023-04-01 03:03:00,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:03:00,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886292630] [2023-04-01 03:03:00,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:03:00,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:03:00,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:03:01,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:03:01,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:03:01,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886292630] [2023-04-01 03:03:01,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886292630] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:03:01,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476327062] [2023-04-01 03:03:01,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 03:03:01,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:03:01,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:03:01,533 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 03:03:01,559 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 03:03:01,595 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 03:03:01,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:03:01,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2023-04-01 03:03:01,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:03:01,634 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 03:03:02,061 INFO L321 Elim1Store]: treesize reduction 31, result has 48.3 percent of original size [2023-04-01 03:03:02,061 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 26 treesize of output 40 [2023-04-01 03:03:08,524 INFO L321 Elim1Store]: treesize reduction 62, result has 56.9 percent of original size [2023-04-01 03:03:08,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 104 treesize of output 156