/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/s2lif.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 03:04:30,603 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 03:04:30,605 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 03:04:30,643 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 03:04:30,644 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 03:04:30,645 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 03:04:30,646 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 03:04:30,647 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 03:04:30,648 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 03:04:30,649 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 03:04:30,650 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 03:04:30,651 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 03:04:30,651 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 03:04:30,652 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 03:04:30,653 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 03:04:30,654 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 03:04:30,654 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 03:04:30,655 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 03:04:30,656 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 03:04:30,658 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 03:04:30,659 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 03:04:30,660 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 03:04:30,661 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 03:04:30,662 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 03:04:30,665 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 03:04:30,665 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 03:04:30,665 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 03:04:30,666 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 03:04:30,666 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 03:04:30,667 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 03:04:30,667 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 03:04:30,668 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 03:04:30,669 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 03:04:30,669 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 03:04:30,670 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 03:04:30,670 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 03:04:30,671 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 03:04:30,671 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 03:04:30,672 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 03:04:30,672 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 03:04:30,673 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 03:04:30,674 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 03:04:30,700 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 03:04:30,700 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 03:04:30,701 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 03:04:30,701 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 03:04:30,702 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 03:04:30,702 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 03:04:30,702 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 03:04:30,702 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 03:04:30,702 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 03:04:30,702 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 03:04:30,702 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 03:04:30,702 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 03:04:30,703 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 03:04:30,703 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 03:04:30,703 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 03:04:30,703 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 03:04:30,703 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 03:04:30,703 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 03:04:30,704 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 03:04:30,704 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 03:04:30,704 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 03:04:30,704 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 03:04:30,704 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 03:04:30,705 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 03:04:30,705 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 03:04:30,705 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 03:04:30,705 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 03:04:30,705 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 03:04:30,705 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 03:04:30,705 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 03:04:30,705 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 03:04:30,706 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 03:04:30,706 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:04:30,706 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 03:04:30,706 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 03:04:30,706 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 03:04:30,706 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 03:04:30,706 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 03:04:30,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 03:04:30,707 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 03:04:30,707 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 03:04:30,707 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 03:04:30,891 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 03:04:30,914 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 03:04:30,916 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 03:04:30,917 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 03:04:30,918 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 03:04:30,919 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/s2lif.c [2023-04-01 03:04:32,121 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 03:04:32,321 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 03:04:32,322 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s2lif.c [2023-04-01 03:04:32,327 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85043823f/2cad07cb8795497e9eb07015f8607f29/FLAG15e33e93f [2023-04-01 03:04:32,339 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85043823f/2cad07cb8795497e9eb07015f8607f29 [2023-04-01 03:04:32,342 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 03:04:32,343 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 03:04:32,344 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 03:04:32,345 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 03:04:32,348 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 03:04:32,348 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:04:32" (1/1) ... [2023-04-01 03:04:32,349 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a418a53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:04:32, skipping insertion in model container [2023-04-01 03:04:32,350 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:04:32" (1/1) ... [2023-04-01 03:04:32,356 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 03:04:32,368 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 03:04:32,504 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/s2lif.c[588,601] [2023-04-01 03:04:32,534 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:04:32,550 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 03:04:32,561 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/s2lif.c[588,601] [2023-04-01 03:04:32,572 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:04:32,584 INFO L208 MainTranslator]: Completed translation [2023-04-01 03:04:32,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:04:32 WrapperNode [2023-04-01 03:04:32,584 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 03:04:32,585 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 03:04:32,586 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 03:04:32,586 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 03:04:32,596 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:04:32" (1/1) ... [2023-04-01 03:04:32,596 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:04:32" (1/1) ... [2023-04-01 03:04:32,613 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:04:32" (1/1) ... [2023-04-01 03:04:32,614 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:04:32" (1/1) ... [2023-04-01 03:04:32,625 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:04:32" (1/1) ... [2023-04-01 03:04:32,630 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:04:32" (1/1) ... [2023-04-01 03:04:32,631 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:04:32" (1/1) ... [2023-04-01 03:04:32,632 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:04:32" (1/1) ... [2023-04-01 03:04:32,633 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 03:04:32,634 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 03:04:32,634 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 03:04:32,635 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 03:04:32,635 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:04:32" (1/1) ... [2023-04-01 03:04:32,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:04:32,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:04:32,669 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 03:04:32,671 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 03:04:32,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 03:04:32,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 03:04:32,700 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 03:04:32,700 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 03:04:32,700 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 03:04:32,700 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 03:04:32,700 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 03:04:32,700 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 03:04:32,700 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 03:04:32,701 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 03:04:32,701 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 03:04:32,701 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 03:04:32,701 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 03:04:32,701 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 03:04:32,701 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 03:04:32,701 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 03:04:32,701 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 03:04:32,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 03:04:32,702 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 03:04:32,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 03:04:32,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 03:04:32,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 03:04:32,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 03:04:32,766 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 03:04:32,767 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 03:04:32,924 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 03:04:32,978 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 03:04:32,978 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 03:04:32,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:04:32 BoogieIcfgContainer [2023-04-01 03:04:32,980 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 03:04:32,993 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 03:04:32,994 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 03:04:32,997 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 03:04:32,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 03:04:32" (1/3) ... [2023-04-01 03:04:32,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1547496f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:04:32, skipping insertion in model container [2023-04-01 03:04:32,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:04:32" (2/3) ... [2023-04-01 03:04:32,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1547496f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:04:32, skipping insertion in model container [2023-04-01 03:04:32,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:04:32" (3/3) ... [2023-04-01 03:04:32,999 INFO L112 eAbstractionObserver]: Analyzing ICFG s2lif.c [2023-04-01 03:04:33,017 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 03:04:33,017 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 03:04:33,082 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 03:04:33,090 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;@66f3909c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 03:04:33,091 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 03:04:33,095 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 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 03:04:33,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-01 03:04:33,103 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:04:33,104 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:04:33,105 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:04:33,112 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:04:33,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1638581746, now seen corresponding path program 1 times [2023-04-01 03:04:33,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:04:33,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426301884] [2023-04-01 03:04:33,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:04:33,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:04:33,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:04:33,456 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 03:04:33,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:04:33,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426301884] [2023-04-01 03:04:33,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426301884] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:04:33,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:04:33,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 03:04:33,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612363123] [2023-04-01 03:04:33,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:04:33,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 03:04:33,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:04:33,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 03:04:33,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 03:04:33,506 INFO L87 Difference]: Start difference. First operand has 25 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 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 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 03:04:33,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:04:33,619 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2023-04-01 03:04:33,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 03:04:33,622 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 17 [2023-04-01 03:04:33,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:04:33,627 INFO L225 Difference]: With dead ends: 46 [2023-04-01 03:04:33,627 INFO L226 Difference]: Without dead ends: 21 [2023-04-01 03:04:33,630 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 03:04:33,633 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 22 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 03:04:33,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 36 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 03:04:33,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-01 03:04:33,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-04-01 03:04:33,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 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 03:04:33,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2023-04-01 03:04:33,665 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2023-04-01 03:04:33,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:04:33,666 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2023-04-01 03:04:33,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 03:04:33,666 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2023-04-01 03:04:33,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 03:04:33,667 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:04:33,667 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:04:33,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 03:04:33,668 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:04:33,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:04:33,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1163256344, now seen corresponding path program 1 times [2023-04-01 03:04:33,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:04:33,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552607345] [2023-04-01 03:04:33,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:04:33,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:04:33,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:04:34,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:04:34,883 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:04:34,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552607345] [2023-04-01 03:04:34,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552607345] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:04:34,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626593059] [2023-04-01 03:04:34,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:04:34,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:04:34,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:04:34,891 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 03:04:34,899 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 03:04:34,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:04:34,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 42 conjunts are in the unsatisfiable core [2023-04-01 03:04:34,981 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:04:35,130 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 03:04:35,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 03:04:35,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 03:04:35,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 03:04:35,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2023-04-01 03:04:35,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 03:04:35,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2023-04-01 03:04:35,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:04:35,565 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:04:35,719 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_#memory_int| c_main_~a~0.base)) (.cse3 (+ (* c_main_~i~0 4) c_main_~a~0.offset))) (let ((.cse4 (* c_~N~0 3)) (.cse0 (= (select .cse2 .cse3) 1))) (and (or (not .cse0) (= (let ((.cse1 (store .cse2 .cse3 3))) (+ (select .cse1 c_main_~a~0.offset) (select (select (store |c_#memory_int| c_main_~a~0.base .cse1) |c_main_~#sum~0.base|) |c_main_~#sum~0.offset|))) .cse4)) (or (forall ((v_ArrVal_44 (Array Int Int))) (= (+ (select v_ArrVal_44 c_main_~a~0.offset) (select (select (store |c_#memory_int| c_main_~a~0.base v_ArrVal_44) |c_main_~#sum~0.base|) |c_main_~#sum~0.offset|)) .cse4)) .cse0)))) is different from false [2023-04-01 03:04:35,913 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 03:04:36,063 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-04-01 03:04:36,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626593059] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:04:36,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [660468737] [2023-04-01 03:04:36,089 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 03:04:36,089 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:04:36,092 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:04:36,096 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:04:36,096 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:04:36,183 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:04:36,558 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-04-01 03:04:36,589 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:04:36,593 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:04:36,605 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:04:37,482 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '279#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_1| Int)) (and (<= ~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|)) (not (= (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_1|) 0) (* 3 ~N~0))) (<= (+ |#StackHeapBarrier| 1) |v_main_~#sum~0.base_BEFORE_CALL_1|))) (<= ~N~0 2147483647) (<= 1 ~N~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:04:37,482 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:04:37,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 03:04:37,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 31 [2023-04-01 03:04:37,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765682691] [2023-04-01 03:04:37,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 03:04:37,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-04-01 03:04:37,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:04:37,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-04-01 03:04:37,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1663, Unknown=1, NotChecked=84, Total=1980 [2023-04-01 03:04:37,489 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 31 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 28 states have internal predecessors, (33), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 03:04:37,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:04:37,851 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2023-04-01 03:04:37,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 03:04:37,852 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 28 states have internal predecessors, (33), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 20 [2023-04-01 03:04:37,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:04:37,853 INFO L225 Difference]: With dead ends: 31 [2023-04-01 03:04:37,853 INFO L226 Difference]: Without dead ends: 26 [2023-04-01 03:04:37,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=275, Invalid=1984, Unknown=1, NotChecked=92, Total=2352 [2023-04-01 03:04:37,855 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 34 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 03:04:37,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 76 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 258 Invalid, 0 Unknown, 30 Unchecked, 0.2s Time] [2023-04-01 03:04:37,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-04-01 03:04:37,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2023-04-01 03:04:37,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 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 03:04:37,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-04-01 03:04:37,875 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 20 [2023-04-01 03:04:37,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:04:37,875 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-04-01 03:04:37,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 28 states have internal predecessors, (33), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 03:04:37,876 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-04-01 03:04:37,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 03:04:37,877 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:04:37,877 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:04:37,887 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 03:04:38,084 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 03:04:38,084 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:04:38,085 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:04:38,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1718330715, now seen corresponding path program 2 times [2023-04-01 03:04:38,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:04:38,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755602065] [2023-04-01 03:04:38,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:04:38,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:04:38,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:04:38,166 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 03:04:38,166 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:04:38,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755602065] [2023-04-01 03:04:38,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755602065] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:04:38,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162729187] [2023-04-01 03:04:38,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 03:04:38,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:04:38,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:04:38,168 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 03:04:38,171 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 03:04:38,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 03:04:38,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:04:38,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 03:04:38,245 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:04:38,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 03:04:38,273 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:04:38,301 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 03:04:38,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162729187] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:04:38,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [115443726] [2023-04-01 03:04:38,306 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 03:04:38,306 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:04:38,307 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:04:38,307 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:04:38,307 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:04:38,346 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:04:38,537 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-04-01 03:04:38,554 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:04:38,558 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:04:38,565 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:04:39,153 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '530#(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_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|)) (not (= (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_2|) 0) (* 3 ~N~0))) (<= ~N~0 (+ 2147483645 |v_main_~#sum~0.base_BEFORE_CALL_2|)))) (= |#NULL.base| 0))' at error location [2023-04-01 03:04:39,154 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:04:39,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 03:04:39,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2023-04-01 03:04:39,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843904301] [2023-04-01 03:04:39,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 03:04:39,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 03:04:39,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:04:39,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 03:04:39,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2023-04-01 03:04:39,156 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 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 03:04:39,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:04:39,233 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2023-04-01 03:04:39,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 03:04:39,234 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 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 21 [2023-04-01 03:04:39,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:04:39,236 INFO L225 Difference]: With dead ends: 40 [2023-04-01 03:04:39,236 INFO L226 Difference]: Without dead ends: 28 [2023-04-01 03:04:39,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2023-04-01 03:04:39,238 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 4 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 03:04:39,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 50 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 03:04:39,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-01 03:04:39,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2023-04-01 03:04:39,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 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 03:04:39,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2023-04-01 03:04:39,246 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 21 [2023-04-01 03:04:39,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:04:39,246 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2023-04-01 03:04:39,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 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 03:04:39,246 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2023-04-01 03:04:39,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 03:04:39,247 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:04:39,247 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:04:39,254 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 03:04:39,453 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 03:04:39,453 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:04:39,454 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:04:39,454 INFO L85 PathProgramCache]: Analyzing trace with hash 391632903, now seen corresponding path program 3 times [2023-04-01 03:04:39,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:04:39,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26707444] [2023-04-01 03:04:39,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:04:39,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:04:39,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:04:39,530 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 03:04:39,530 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:04:39,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26707444] [2023-04-01 03:04:39,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26707444] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:04:39,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528681448] [2023-04-01 03:04:39,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 03:04:39,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:04:39,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:04:39,532 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 03:04:39,565 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 03:04:39,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 03:04:39,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:04:39,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 03:04:39,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:04:39,663 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 03:04:39,664 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:04:39,699 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 03:04:39,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528681448] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:04:39,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1547904612] [2023-04-01 03:04:39,701 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 03:04:39,702 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:04:39,702 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:04:39,702 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:04:39,702 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:04:39,733 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:04:39,923 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-04-01 03:04:39,941 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:04:39,945 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:04:39,952 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:04:40,520 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '795#(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_3| Int)) (and (not (= (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_3|) 0) (* 3 ~N~0))) (<= 3 (+ ~N~0 |v_main_~#sum~0.base_BEFORE_CALL_3|)) (<= 3 (+ |v_main_~#sum~0.base_BEFORE_CALL_3| |#StackHeapBarrier|)) (<= 2 |v_main_~#sum~0.base_BEFORE_CALL_3|) (<= ~N~0 (+ 2147483645 |v_main_~#sum~0.base_BEFORE_CALL_3|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#sum~0.base_BEFORE_CALL_3|))) (= |#NULL.base| 0))' at error location [2023-04-01 03:04:40,520 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:04:40,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 03:04:40,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-04-01 03:04:40,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999325767] [2023-04-01 03:04:40,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 03:04:40,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 03:04:40,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:04:40,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 03:04:40,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2023-04-01 03:04:40,522 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 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 03:04:40,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:04:40,607 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2023-04-01 03:04:40,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 03:04:40,608 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 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 21 [2023-04-01 03:04:40,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:04:40,609 INFO L225 Difference]: With dead ends: 31 [2023-04-01 03:04:40,609 INFO L226 Difference]: Without dead ends: 24 [2023-04-01 03:04:40,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2023-04-01 03:04:40,610 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 03:04:40,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 44 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 03:04:40,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-04-01 03:04:40,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-04-01 03:04:40,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 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 03:04:40,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2023-04-01 03:04:40,619 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2023-04-01 03:04:40,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:04:40,619 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2023-04-01 03:04:40,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 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 03:04:40,619 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2023-04-01 03:04:40,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 03:04:40,620 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:04:40,620 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:04:40,629 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 03:04:40,826 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 03:04:40,827 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:04:40,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:04:40,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1923768434, now seen corresponding path program 4 times [2023-04-01 03:04:40,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:04:40,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303114225] [2023-04-01 03:04:40,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:04:40,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:04:40,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:04:42,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:04:42,049 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:04:42,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303114225] [2023-04-01 03:04:42,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303114225] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:04:42,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034654303] [2023-04-01 03:04:42,050 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 03:04:42,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:04:42,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:04:42,051 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 03:04:42,054 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 03:04:42,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:04:42,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 59 conjunts are in the unsatisfiable core [2023-04-01 03:04:42,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:04:42,146 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 10 treesize of output 8 [2023-04-01 03:04:42,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 03:04:42,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 03:04:42,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-04-01 03:04:42,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-04-01 03:04:42,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-04-01 03:04:42,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-04-01 03:04:42,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-04-01 03:04:42,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:04:42,589 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:04:42,757 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse8 (select |c_#memory_int| c_main_~a~0.base)) (.cse9 (+ (* c_main_~i~0 4) c_main_~a~0.offset))) (let ((.cse6 (+ c_main_~a~0.offset 4)) (.cse1 (* c_~N~0 3)) (.cse0 (= (select .cse8 .cse9) 1))) (and (or (not .cse0) (= .cse1 (let ((.cse7 (store .cse8 .cse9 3))) (let ((.cse3 (store |c_#memory_int| c_main_~a~0.base .cse7))) (let ((.cse4 (select .cse3 |c_main_~#sum~0.base|))) (let ((.cse2 (select .cse7 c_main_~a~0.offset)) (.cse5 (select .cse4 |c_main_~#sum~0.offset|))) (+ .cse2 (select (select (store .cse3 |c_main_~#sum~0.base| (store .cse4 |c_main_~#sum~0.offset| (+ .cse2 .cse5))) c_main_~a~0.base) .cse6) .cse5))))))) (or (forall ((v_ArrVal_177 (Array Int Int))) (= (let ((.cse11 (store |c_#memory_int| c_main_~a~0.base v_ArrVal_177))) (let ((.cse12 (select .cse11 |c_main_~#sum~0.base|))) (let ((.cse10 (select v_ArrVal_177 c_main_~a~0.offset)) (.cse13 (select .cse12 |c_main_~#sum~0.offset|))) (+ .cse10 (select (select (store .cse11 |c_main_~#sum~0.base| (store .cse12 |c_main_~#sum~0.offset| (+ .cse10 .cse13))) c_main_~a~0.base) .cse6) .cse13)))) .cse1)) .cse0)))) is different from false [2023-04-01 03:04:42,846 INFO L321 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2023-04-01 03:04:42,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 181 treesize of output 140 [2023-04-01 03:04:43,001 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 10 treesize of output 3 [2023-04-01 03:05:13,350 WARN L223 SmtUtils]: Spent 7.33s on a formula simplification. DAG size of input: 109 DAG size of output: 50 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 03:05:15,995 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-04-01 03:05:15,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034654303] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:05:15,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1155065404] [2023-04-01 03:05:15,998 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 03:05:15,998 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:05:15,999 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:05:15,999 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:05:15,999 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:05:16,070 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:05:16,384 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-04-01 03:05:16,431 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:05:16,445 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:05:16,464 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:05:27,359 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1073#(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_4| Int)) (and (<= (+ |#StackHeapBarrier| 1) |v_main_~#sum~0.base_BEFORE_CALL_4|) (not (= (* 3 ~N~0) (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_4|) 0))) (<= 3 (+ ~N~0 |v_main_~#sum~0.base_BEFORE_CALL_4|)) (<= ~N~0 (+ 2147483645 |v_main_~#sum~0.base_BEFORE_CALL_4|)) (<= 3 (+ |v_main_~#sum~0.base_BEFORE_CALL_4| |#StackHeapBarrier|)) (<= 2 |v_main_~#sum~0.base_BEFORE_CALL_4|))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:05:27,360 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:05:27,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 03:05:27,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2023-04-01 03:05:27,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569375612] [2023-04-01 03:05:27,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 03:05:27,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-04-01 03:05:27,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:05:27,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-04-01 03:05:27,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1830, Unknown=9, NotChecked=86, Total=2070 [2023-04-01 03:05:27,363 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 32 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:05:31,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:05:31,636 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2023-04-01 03:05:31,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 03:05:31,637 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2023-04-01 03:05:31,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:05:31,638 INFO L225 Difference]: With dead ends: 36 [2023-04-01 03:05:31,638 INFO L226 Difference]: Without dead ends: 31 [2023-04-01 03:05:31,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 44.8s TimeCoverageRelationStatistics Valid=158, Invalid=1999, Unknown=9, NotChecked=90, Total=2256 [2023-04-01 03:05:31,640 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 3 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-04-01 03:05:31,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 150 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 323 Invalid, 0 Unknown, 24 Unchecked, 3.3s Time] [2023-04-01 03:05:31,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-04-01 03:05:31,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2023-04-01 03:05:31,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 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 03:05:31,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2023-04-01 03:05:31,650 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 23 [2023-04-01 03:05:31,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:05:31,650 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2023-04-01 03:05:31,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:05:31,650 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2023-04-01 03:05:31,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 03:05:31,651 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:05:31,651 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:05:31,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 03:05:31,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:05:31,857 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:05:31,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:05:31,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1956565265, now seen corresponding path program 5 times [2023-04-01 03:05:31,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:05:31,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929563761] [2023-04-01 03:05:31,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:05:31,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:05:31,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:05:32,467 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 03:05:32,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:05:32,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929563761] [2023-04-01 03:05:32,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929563761] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:05:32,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956866925] [2023-04-01 03:05:32,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 03:05:32,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:05:32,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:05:32,469 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:05:32,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 03:05:32,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 03:05:32,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:05:32,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 03:05:32,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:05:33,321 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 03:05:33,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:05:33,795 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 03:05:33,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956866925] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:05:33,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1062807199] [2023-04-01 03:05:33,797 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 03:05:33,797 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:05:33,798 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:05:33,798 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:05:33,798 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:05:33,865 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 03:05:34,150 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2023-04-01 03:05:34,195 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-04-01 03:05:34,207 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 03:05:34,223 INFO L180 IcfgInterpreter]: Interpretation finished