/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/loop-acceleration/array_4.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 11:03:20,353 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 11:03:20,355 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 11:03:20,389 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 11:03:20,389 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 11:03:20,391 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 11:03:20,394 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 11:03:20,395 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 11:03:20,396 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 11:03:20,401 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 11:03:20,403 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 11:03:20,404 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 11:03:20,404 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 11:03:20,407 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 11:03:20,407 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 11:03:20,408 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 11:03:20,409 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 11:03:20,409 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 11:03:20,411 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 11:03:20,416 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 11:03:20,417 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 11:03:20,418 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 11:03:20,418 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 11:03:20,419 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 11:03:20,427 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 11:03:20,427 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 11:03:20,427 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 11:03:20,429 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 11:03:20,429 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 11:03:20,429 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 11:03:20,430 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 11:03:20,430 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 11:03:20,431 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 11:03:20,431 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 11:03:20,432 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 11:03:20,432 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 11:03:20,432 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 11:03:20,432 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 11:03:20,433 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 11:03:20,433 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 11:03:20,434 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 11:03:20,434 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 11:03:20,459 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 11:03:20,459 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 11:03:20,460 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 11:03:20,460 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 11:03:20,460 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 11:03:20,461 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 11:03:20,461 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 11:03:20,461 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 11:03:20,461 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 11:03:20,461 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 11:03:20,462 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 11:03:20,462 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 11:03:20,462 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 11:03:20,462 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 11:03:20,462 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 11:03:20,462 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 11:03:20,462 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 11:03:20,462 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 11:03:20,463 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 11:03:20,463 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 11:03:20,463 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 11:03:20,463 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 11:03:20,463 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 11:03:20,463 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 11:03:20,463 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 11:03:20,463 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 11:03:20,464 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 11:03:20,464 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 11:03:20,464 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 11:03:20,464 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 11:03:20,464 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 11:03:20,464 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 11:03:20,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:03:20,464 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 11:03:20,464 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 11:03:20,465 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 11:03:20,465 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 11:03:20,465 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 11:03:20,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 11:03:20,465 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 11:03:20,465 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 11:03:20,465 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 11:03:20,658 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 11:03:20,677 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 11:03:20,681 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 11:03:20,682 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 11:03:20,682 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 11:03:20,683 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/array_4.i [2023-04-01 11:03:21,708 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 11:03:21,898 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 11:03:21,898 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/array_4.i [2023-04-01 11:03:21,902 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bccc4154b/03b431feb5904b27a47916bda602f23f/FLAGee69c36f0 [2023-04-01 11:03:21,912 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bccc4154b/03b431feb5904b27a47916bda602f23f [2023-04-01 11:03:21,914 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 11:03:21,915 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 11:03:21,916 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 11:03:21,916 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 11:03:21,918 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 11:03:21,919 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:03:21" (1/1) ... [2023-04-01 11:03:21,920 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6809c7eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:03:21, skipping insertion in model container [2023-04-01 11:03:21,920 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:03:21" (1/1) ... [2023-04-01 11:03:21,924 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 11:03:21,934 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 11:03:22,029 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/array_4.i[848,861] [2023-04-01 11:03:22,042 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:03:22,050 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 11:03:22,059 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/array_4.i[848,861] [2023-04-01 11:03:22,066 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:03:22,078 INFO L208 MainTranslator]: Completed translation [2023-04-01 11:03:22,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:03:22 WrapperNode [2023-04-01 11:03:22,078 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 11:03:22,079 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 11:03:22,079 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 11:03:22,079 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 11:03:22,089 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:03:22" (1/1) ... [2023-04-01 11:03:22,089 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:03:22" (1/1) ... [2023-04-01 11:03:22,094 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:03:22" (1/1) ... [2023-04-01 11:03:22,094 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:03:22" (1/1) ... [2023-04-01 11:03:22,098 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:03:22" (1/1) ... [2023-04-01 11:03:22,101 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:03:22" (1/1) ... [2023-04-01 11:03:22,102 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:03:22" (1/1) ... [2023-04-01 11:03:22,103 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:03:22" (1/1) ... [2023-04-01 11:03:22,104 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 11:03:22,105 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 11:03:22,105 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 11:03:22,105 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 11:03:22,106 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:03:22" (1/1) ... [2023-04-01 11:03:22,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:03:22,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:03:22,145 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 11:03:22,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 11:03:22,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 11:03:22,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 11:03:22,224 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 11:03:22,225 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 11:03:22,225 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 11:03:22,225 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 11:03:22,225 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 11:03:22,225 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 11:03:22,225 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 11:03:22,226 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 11:03:22,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 11:03:22,226 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 11:03:22,226 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 11:03:22,226 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 11:03:22,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 11:03:22,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 11:03:22,226 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 11:03:22,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 11:03:22,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 11:03:22,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 11:03:22,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 11:03:22,307 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 11:03:22,309 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 11:03:22,452 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 11:03:22,485 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 11:03:22,485 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 11:03:22,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:03:22 BoogieIcfgContainer [2023-04-01 11:03:22,487 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 11:03:22,505 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 11:03:22,505 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 11:03:22,507 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 11:03:22,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:03:21" (1/3) ... [2023-04-01 11:03:22,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d04ee76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:03:22, skipping insertion in model container [2023-04-01 11:03:22,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:03:22" (2/3) ... [2023-04-01 11:03:22,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d04ee76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:03:22, skipping insertion in model container [2023-04-01 11:03:22,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:03:22" (3/3) ... [2023-04-01 11:03:22,509 INFO L112 eAbstractionObserver]: Analyzing ICFG array_4.i [2023-04-01 11:03:22,535 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 11:03:22,535 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 11:03:22,598 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 11:03:22,604 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;@5b218106, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 11:03:22,604 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 11:03:22,608 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 11:03:22,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 11:03:22,614 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:03:22,614 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:03:22,615 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:03:22,619 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:03:22,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1371244011, now seen corresponding path program 1 times [2023-04-01 11:03:22,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:03:22,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953721754] [2023-04-01 11:03:22,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:03:22,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:03:22,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:03:22,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:03:22,776 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:03:22,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953721754] [2023-04-01 11:03:22,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953721754] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:03:22,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:03:22,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 11:03:22,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911916074] [2023-04-01 11:03:22,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:03:22,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 11:03:22,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:03:22,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 11:03:22,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 11:03:22,823 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:22,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:03:22,868 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2023-04-01 11:03:22,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 11:03:22,871 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 11:03:22,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:03:22,874 INFO L225 Difference]: With dead ends: 30 [2023-04-01 11:03:22,875 INFO L226 Difference]: Without dead ends: 13 [2023-04-01 11:03:22,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 11:03:22,881 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:03:22,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:03:22,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-04-01 11:03:22,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-04-01 11:03:22,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:22,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2023-04-01 11:03:22,911 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2023-04-01 11:03:22,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:03:22,912 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2023-04-01 11:03:22,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:22,913 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2023-04-01 11:03:22,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-01 11:03:22,914 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:03:22,914 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:03:22,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 11:03:22,914 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:03:22,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:03:22,915 INFO L85 PathProgramCache]: Analyzing trace with hash 158835998, now seen corresponding path program 1 times [2023-04-01 11:03:22,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:03:22,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326664271] [2023-04-01 11:03:22,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:03:22,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:03:22,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:03:23,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:03:23,037 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:03:23,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326664271] [2023-04-01 11:03:23,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326664271] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:03:23,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:03:23,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 11:03:23,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298093245] [2023-04-01 11:03:23,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:03:23,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 11:03:23,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:03:23,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 11:03:23,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 11:03:23,039 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:23,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:03:23,053 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2023-04-01 11:03:23,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 11:03:23,054 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-04-01 11:03:23,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:03:23,056 INFO L225 Difference]: With dead ends: 24 [2023-04-01 11:03:23,056 INFO L226 Difference]: Without dead ends: 17 [2023-04-01 11:03:23,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 11:03:23,057 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:03:23,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 16 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:03:23,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-04-01 11:03:23,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2023-04-01 11:03:23,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:23,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2023-04-01 11:03:23,063 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2023-04-01 11:03:23,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:03:23,063 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2023-04-01 11:03:23,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:23,063 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2023-04-01 11:03:23,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-01 11:03:23,065 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:03:23,065 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:03:23,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 11:03:23,066 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:03:23,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:03:23,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1612899771, now seen corresponding path program 1 times [2023-04-01 11:03:23,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:03:23,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647323072] [2023-04-01 11:03:23,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:03:23,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:03:23,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:03:23,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:03:23,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:03:23,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647323072] [2023-04-01 11:03:23,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647323072] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:03:23,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731424296] [2023-04-01 11:03:23,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:03:23,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:03:23,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:03:23,160 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:03:23,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 11:03:23,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:03:23,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 11:03:23,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:03:23,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:03:23,260 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:03:23,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:03:23,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731424296] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:03:23,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [435479276] [2023-04-01 11:03:23,325 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 11:03:23,325 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:03:23,329 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:03:23,333 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:03:23,334 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:03:23,468 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:03:23,698 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 62 for LOIs [2023-04-01 11:03:23,723 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:03:23,728 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:03:24,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [435479276] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:03:24,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:03:24,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [4, 4, 4] total 17 [2023-04-01 11:03:24,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904293430] [2023-04-01 11:03:24,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:03:24,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 11:03:24,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:03:24,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 11:03:24,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2023-04-01 11:03:24,323 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 12 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:25,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:03:25,176 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2023-04-01 11:03:25,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 11:03:25,176 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-04-01 11:03:25,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:03:25,177 INFO L225 Difference]: With dead ends: 21 [2023-04-01 11:03:25,177 INFO L226 Difference]: Without dead ends: 16 [2023-04-01 11:03:25,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2023-04-01 11:03:25,178 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 42 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:03:25,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 6 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:03:25,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-04-01 11:03:25,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-04-01 11:03:25,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:25,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2023-04-01 11:03:25,183 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2023-04-01 11:03:25,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:03:25,183 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2023-04-01 11:03:25,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:25,184 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2023-04-01 11:03:25,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-01 11:03:25,184 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:03:25,184 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:03:25,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 11:03:25,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:03:25,385 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:03:25,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:03:25,385 INFO L85 PathProgramCache]: Analyzing trace with hash -2137079361, now seen corresponding path program 1 times [2023-04-01 11:03:25,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:03:25,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999181780] [2023-04-01 11:03:25,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:03:25,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:03:25,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:03:25,437 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 11:03:25,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:03:25,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999181780] [2023-04-01 11:03:25,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999181780] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:03:25,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659482721] [2023-04-01 11:03:25,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:03:25,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:03:25,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:03:25,439 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:03:25,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 11:03:25,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:03:25,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 11:03:25,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:03:25,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 11:03:25,517 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:03:25,527 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 11:03:25,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659482721] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:03:25,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1104822185] [2023-04-01 11:03:25,529 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 11:03:25,529 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:03:25,529 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:03:25,529 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:03:25,529 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:03:25,567 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:03:25,796 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 66 for LOIs [2023-04-01 11:03:25,826 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:03:25,828 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:03:26,217 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '410#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (exists ((|v_old(#valid)_BEFORE_CALL_2| (Array Int Int)) (|v_old(#length)_BEFORE_CALL_2| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_2| (Array Int (Array Int Int))) (|v_main_~#A~0.base_BEFORE_CALL_2| Int) (v_main_~i~0_BEFORE_CALL_2 Int)) (and (= 2 (select |v_old(#length)_BEFORE_CALL_2| 1)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_2| 1) 1) 0) (= (select |v_old(#valid)_BEFORE_CALL_2| 0) 0) (< 1024 v_main_~i~0_BEFORE_CALL_2) (= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_2|) (* v_main_~i~0_BEFORE_CALL_2 4)) 0) (not (= |v_main_~#A~0.base_BEFORE_CALL_2| 1)) (= (select |v_old(#valid)_BEFORE_CALL_2| |v_main_~#A~0.base_BEFORE_CALL_2|) 0) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_2| 1) 0)) (not (= |v_old(#length)_BEFORE_CALL_2| (select |v_old(#memory_int)_BEFORE_CALL_2| 1))) (not (= |v_old(#valid)_BEFORE_CALL_2| (select |v_old(#memory_int)_BEFORE_CALL_2| 1))) (not (= |v_old(#valid)_BEFORE_CALL_2| |v_old(#length)_BEFORE_CALL_2|)) (= (select |v_old(#valid)_BEFORE_CALL_2| 2) 1) (not (= |v_main_~#A~0.base_BEFORE_CALL_2| 2)) (not (= |v_main_~#A~0.base_BEFORE_CALL_2| |#StackHeapBarrier|)) (not (= |v_main_~#A~0.base_BEFORE_CALL_2| 0)) (= (select |v_old(#length)_BEFORE_CALL_2| 2) 10) (= (select |v_old(#valid)_BEFORE_CALL_2| 1) 1))) (= |#NULL.base| 0))' at error location [2023-04-01 11:03:26,218 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:03:26,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:03:26,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-01 11:03:26,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878240927] [2023-04-01 11:03:26,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 11:03:26,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 11:03:26,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:03:26,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 11:03:26,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2023-04-01 11:03:26,220 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:26,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:03:26,257 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2023-04-01 11:03:26,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 11:03:26,261 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-04-01 11:03:26,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:03:26,263 INFO L225 Difference]: With dead ends: 37 [2023-04-01 11:03:26,263 INFO L226 Difference]: Without dead ends: 28 [2023-04-01 11:03:26,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2023-04-01 11:03:26,266 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 11 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:03:26,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 25 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:03:26,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-01 11:03:26,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2023-04-01 11:03:26,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:26,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2023-04-01 11:03:26,275 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2023-04-01 11:03:26,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:03:26,275 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2023-04-01 11:03:26,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:26,275 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2023-04-01 11:03:26,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 11:03:26,276 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:03:26,276 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:03:26,284 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-01 11:03:26,481 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,SelfDestructingSolverStorable3 [2023-04-01 11:03:26,482 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:03:26,482 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:03:26,482 INFO L85 PathProgramCache]: Analyzing trace with hash 963126178, now seen corresponding path program 2 times [2023-04-01 11:03:26,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:03:26,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548307169] [2023-04-01 11:03:26,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:03:26,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:03:26,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:03:26,596 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 11:03:26,596 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:03:26,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548307169] [2023-04-01 11:03:26,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548307169] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:03:26,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359449357] [2023-04-01 11:03:26,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 11:03:26,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:03:26,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:03:26,598 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:03:26,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 11:03:26,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 11:03:26,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 11:03:26,644 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 11:03:26,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:03:26,668 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 11:03:26,669 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:03:26,693 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 11:03:26,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359449357] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:03:26,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1938087101] [2023-04-01 11:03:26,695 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 11:03:26,695 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:03:26,695 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:03:26,695 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:03:26,695 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:03:26,720 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:03:26,863 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 66 for LOIs [2023-04-01 11:03:26,884 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:03:26,886 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:03:27,302 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '628#(and (exists ((|v_old(#length)_BEFORE_CALL_3| (Array Int Int)) (|v_old(#valid)_BEFORE_CALL_3| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_3| (Array Int (Array Int Int))) (|v_main_~#A~0.base_BEFORE_CALL_3| Int) (v_main_~i~0_BEFORE_CALL_4 Int)) (and (= (select |v_old(#length)_BEFORE_CALL_3| 2) 10) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 1) 0) 48) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 1) 1) 0) (= (select |v_old(#valid)_BEFORE_CALL_3| 0) 0) (< 1024 v_main_~i~0_BEFORE_CALL_4) (not (= |v_main_~#A~0.base_BEFORE_CALL_3| 2)) (not (= |v_old(#valid)_BEFORE_CALL_3| |v_old(#length)_BEFORE_CALL_3|)) (not (= |v_main_~#A~0.base_BEFORE_CALL_3| |#StackHeapBarrier|)) (= 2 (select |v_old(#length)_BEFORE_CALL_3| 1)) (= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_3|) (* v_main_~i~0_BEFORE_CALL_4 4)) 0) (not (= |v_old(#length)_BEFORE_CALL_3| (select |v_old(#memory_int)_BEFORE_CALL_3| 1))) (not (= |v_main_~#A~0.base_BEFORE_CALL_3| 1)) (not (= |v_old(#valid)_BEFORE_CALL_3| (select |v_old(#memory_int)_BEFORE_CALL_3| 1))) (not (= |v_main_~#A~0.base_BEFORE_CALL_3| 0)) (= (select |v_old(#valid)_BEFORE_CALL_3| 2) 1) (= (select |v_old(#valid)_BEFORE_CALL_3| |v_main_~#A~0.base_BEFORE_CALL_3|) 0) (= (select |v_old(#valid)_BEFORE_CALL_3| 1) 1))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:03:27,303 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:03:27,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:03:27,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-04-01 11:03:27,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853410402] [2023-04-01 11:03:27,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 11:03:27,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 11:03:27,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:03:27,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 11:03:27,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2023-04-01 11:03:27,304 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:27,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:03:27,354 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2023-04-01 11:03:27,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 11:03:27,354 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-04-01 11:03:27,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:03:27,355 INFO L225 Difference]: With dead ends: 32 [2023-04-01 11:03:27,355 INFO L226 Difference]: Without dead ends: 25 [2023-04-01 11:03:27,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2023-04-01 11:03:27,356 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 3 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:03:27,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 41 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:03:27,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-04-01 11:03:27,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-04-01 11:03:27,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:27,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2023-04-01 11:03:27,366 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 18 [2023-04-01 11:03:27,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:03:27,367 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2023-04-01 11:03:27,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:27,367 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2023-04-01 11:03:27,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 11:03:27,368 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:03:27,368 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:03:27,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 11:03:27,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:03:27,573 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:03:27,574 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:03:27,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1570972818, now seen corresponding path program 3 times [2023-04-01 11:03:27,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:03:27,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649447731] [2023-04-01 11:03:27,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:03:27,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:03:27,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:03:27,671 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-01 11:03:27,671 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:03:27,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649447731] [2023-04-01 11:03:27,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649447731] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:03:27,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798155426] [2023-04-01 11:03:27,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 11:03:27,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:03:27,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:03:27,672 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:03:27,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 11:03:27,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 11:03:27,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 11:03:27,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 11:03:27,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:03:27,726 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-01 11:03:27,727 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:03:27,764 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-01 11:03:27,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798155426] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:03:27,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1336847246] [2023-04-01 11:03:27,765 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 11:03:27,765 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:03:27,765 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:03:27,766 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:03:27,766 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:03:27,785 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:03:27,908 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 66 for LOIs [2023-04-01 11:03:27,934 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:03:27,937 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:03:28,291 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '887#(and (exists ((|v_old(#memory_int)_BEFORE_CALL_4| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_4| (Array Int Int)) (|v_old(#length)_BEFORE_CALL_4| (Array Int Int)) (|v_main_~#A~0.base_BEFORE_CALL_4| Int) (v_main_~i~0_BEFORE_CALL_5 Int)) (and (= (select |v_old(#length)_BEFORE_CALL_4| 1) 2) (= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_4|) (* v_main_~i~0_BEFORE_CALL_5 4)) 0) (not (= |v_main_~#A~0.base_BEFORE_CALL_4| 2)) (= (select |v_old(#valid)_BEFORE_CALL_4| 1) 1) (= (select |v_old(#valid)_BEFORE_CALL_4| 0) 0) (not (= |v_old(#valid)_BEFORE_CALL_4| |v_old(#length)_BEFORE_CALL_4|)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_4| 1) |v_old(#length)_BEFORE_CALL_4|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_4| 1) 1) 0) (< 1024 v_main_~i~0_BEFORE_CALL_5) (not (= |v_main_~#A~0.base_BEFORE_CALL_4| |#StackHeapBarrier|)) (not (= |v_main_~#A~0.base_BEFORE_CALL_4| 0)) (= (select |v_old(#length)_BEFORE_CALL_4| 2) 10) (not (= |v_old(#valid)_BEFORE_CALL_4| (select |v_old(#memory_int)_BEFORE_CALL_4| 1))) (not (= |v_main_~#A~0.base_BEFORE_CALL_4| 1)) (= (select |v_old(#valid)_BEFORE_CALL_4| 2) 1) (= (select |v_old(#valid)_BEFORE_CALL_4| |v_main_~#A~0.base_BEFORE_CALL_4|) 0) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_4| 1) 0)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:03:28,292 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:03:28,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:03:28,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-04-01 11:03:28,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741782296] [2023-04-01 11:03:28,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 11:03:28,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 11:03:28,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:03:28,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 11:03:28,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2023-04-01 11:03:28,293 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:28,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:03:28,352 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2023-04-01 11:03:28,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 11:03:28,352 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2023-04-01 11:03:28,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:03:28,352 INFO L225 Difference]: With dead ends: 64 [2023-04-01 11:03:28,352 INFO L226 Difference]: Without dead ends: 49 [2023-04-01 11:03:28,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2023-04-01 11:03:28,353 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 34 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:03:28,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 35 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:03:28,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-04-01 11:03:28,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 31. [2023-04-01 11:03:28,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:28,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2023-04-01 11:03:28,361 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 24 [2023-04-01 11:03:28,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:03:28,362 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2023-04-01 11:03:28,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:28,362 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2023-04-01 11:03:28,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 11:03:28,362 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:03:28,362 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:03:28,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-01 11:03:28,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:03:28,567 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:03:28,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:03:28,567 INFO L85 PathProgramCache]: Analyzing trace with hash 597593678, now seen corresponding path program 4 times [2023-04-01 11:03:28,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:03:28,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815986509] [2023-04-01 11:03:28,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:03:28,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:03:28,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:03:28,837 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-01 11:03:28,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:03:28,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815986509] [2023-04-01 11:03:28,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815986509] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:03:28,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022796720] [2023-04-01 11:03:28,838 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 11:03:28,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:03:28,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:03:28,839 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 11:03:28,866 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 11:03:28,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:03:28,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 11:03:28,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:03:28,955 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-01 11:03:28,955 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:03:29,139 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-01 11:03:29,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022796720] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:03:29,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [626165014] [2023-04-01 11:03:29,141 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 11:03:29,141 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:03:29,141 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:03:29,141 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:03:29,141 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:03:29,185 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:03:29,298 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 66 for LOIs [2023-04-01 11:03:29,317 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:03:29,319 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:03:29,713 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1257#(and (exists ((|v_old(#memory_int)_BEFORE_CALL_5| (Array Int (Array Int Int))) (v_main_~i~0_BEFORE_CALL_6 Int) (|v_old(#length)_BEFORE_CALL_5| (Array Int Int)) (|v_old(#valid)_BEFORE_CALL_5| (Array Int Int)) (|v_main_~#A~0.base_BEFORE_CALL_5| Int)) (and (= 10 (select |v_old(#length)_BEFORE_CALL_5| 2)) (not (= |v_main_~#A~0.base_BEFORE_CALL_5| 2)) (not (= |v_old(#valid)_BEFORE_CALL_5| (select |v_old(#memory_int)_BEFORE_CALL_5| 1))) (not (= |v_main_~#A~0.base_BEFORE_CALL_5| 0)) (= (select |v_old(#valid)_BEFORE_CALL_5| 1) 1) (= (select |v_old(#valid)_BEFORE_CALL_5| 2) 1) (= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_5|) (* v_main_~i~0_BEFORE_CALL_6 4)) 0) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_5| 1) 0)) (= (select |v_old(#valid)_BEFORE_CALL_5| |v_main_~#A~0.base_BEFORE_CALL_5|) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_5| 1) 1) 0) (not (= |v_main_~#A~0.base_BEFORE_CALL_5| |#StackHeapBarrier|)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_5| 1) |v_old(#length)_BEFORE_CALL_5|)) (= (select |v_old(#valid)_BEFORE_CALL_5| 0) 0) (not (= |v_old(#valid)_BEFORE_CALL_5| |v_old(#length)_BEFORE_CALL_5|)) (= 2 (select |v_old(#length)_BEFORE_CALL_5| 1)) (< 1024 v_main_~i~0_BEFORE_CALL_6) (not (= |v_main_~#A~0.base_BEFORE_CALL_5| 1)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:03:29,714 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:03:29,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:03:29,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-04-01 11:03:29,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892903330] [2023-04-01 11:03:29,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 11:03:29,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 11:03:29,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:03:29,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 11:03:29,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=863, Unknown=0, NotChecked=0, Total=1190 [2023-04-01 11:03:29,715 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:29,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:03:29,860 INFO L93 Difference]: Finished difference Result 112 states and 143 transitions. [2023-04-01 11:03:29,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-01 11:03:29,860 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2023-04-01 11:03:29,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:03:29,863 INFO L225 Difference]: With dead ends: 112 [2023-04-01 11:03:29,863 INFO L226 Difference]: Without dead ends: 97 [2023-04-01 11:03:29,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=327, Invalid=863, Unknown=0, NotChecked=0, Total=1190 [2023-04-01 11:03:29,864 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 145 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:03:29,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 37 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:03:29,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-04-01 11:03:29,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 43. [2023-04-01 11:03:29,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:29,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2023-04-01 11:03:29,886 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 30 [2023-04-01 11:03:29,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:03:29,886 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2023-04-01 11:03:29,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:29,886 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2023-04-01 11:03:29,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-01 11:03:29,887 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:03:29,887 INFO L195 NwaCegarLoop]: trace histogram [22, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:03:29,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 11:03:30,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:03:30,101 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:03:30,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:03:30,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1011680242, now seen corresponding path program 5 times [2023-04-01 11:03:30,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:03:30,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203028808] [2023-04-01 11:03:30,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:03:30,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:03:30,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:03:30,468 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-01 11:03:30,469 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:03:30,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203028808] [2023-04-01 11:03:30,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203028808] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:03:30,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888628900] [2023-04-01 11:03:30,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 11:03:30,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:03:30,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:03:30,470 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:03:30,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 11:03:30,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-04-01 11:03:30,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 11:03:30,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 11:03:30,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:03:30,587 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-04-01 11:03:30,588 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:03:30,721 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-04-01 11:03:30,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888628900] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:03:30,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1767015486] [2023-04-01 11:03:30,723 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 11:03:30,723 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:03:30,723 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:03:30,723 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:03:30,723 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:03:30,743 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:03:30,850 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 66 for LOIs [2023-04-01 11:03:30,867 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:03:30,869 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:03:31,275 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1817#(and (exists ((|v_old(#valid)_BEFORE_CALL_6| (Array Int Int)) (v_main_~i~0_BEFORE_CALL_8 Int) (|v_old(#memory_int)_BEFORE_CALL_6| (Array Int (Array Int Int))) (|v_old(#length)_BEFORE_CALL_6| (Array Int Int)) (|v_main_~#A~0.base_BEFORE_CALL_6| Int)) (and (= (select (select |v_old(#memory_int)_BEFORE_CALL_6| 1) 1) 0) (not (= |v_main_~#A~0.base_BEFORE_CALL_6| 2)) (not (= |v_main_~#A~0.base_BEFORE_CALL_6| 0)) (not (= |v_old(#valid)_BEFORE_CALL_6| |v_old(#length)_BEFORE_CALL_6|)) (= (select |v_old(#length)_BEFORE_CALL_6| 2) 10) (not (= |v_main_~#A~0.base_BEFORE_CALL_6| |#StackHeapBarrier|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_6| 1) 0) 48) (not (= (select |v_old(#memory_int)_BEFORE_CALL_6| 1) |v_old(#length)_BEFORE_CALL_6|)) (= (select |v_old(#valid)_BEFORE_CALL_6| 2) 1) (= (select |v_old(#length)_BEFORE_CALL_6| 1) 2) (not (= |v_old(#valid)_BEFORE_CALL_6| (select |v_old(#memory_int)_BEFORE_CALL_6| 1))) (< 1024 v_main_~i~0_BEFORE_CALL_8) (= (select |v_old(#valid)_BEFORE_CALL_6| |v_main_~#A~0.base_BEFORE_CALL_6|) 0) (= (select |v_old(#valid)_BEFORE_CALL_6| 1) 1) (= (select |v_old(#valid)_BEFORE_CALL_6| 0) 0) (not (= |v_main_~#A~0.base_BEFORE_CALL_6| 1)) (= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_6|) (* v_main_~i~0_BEFORE_CALL_8 4)) 0))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:03:31,275 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:03:31,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:03:31,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9, 9] total 35 [2023-04-01 11:03:31,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545495480] [2023-04-01 11:03:31,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 11:03:31,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-04-01 11:03:31,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:03:31,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-04-01 11:03:31,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=1478, Unknown=0, NotChecked=0, Total=1980 [2023-04-01 11:03:31,278 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 33 states have internal predecessors, (59), 4 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:31,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:03:31,473 INFO L93 Difference]: Finished difference Result 136 states and 165 transitions. [2023-04-01 11:03:31,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-04-01 11:03:31,474 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 33 states have internal predecessors, (59), 4 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2023-04-01 11:03:31,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:03:31,475 INFO L225 Difference]: With dead ends: 136 [2023-04-01 11:03:31,475 INFO L226 Difference]: Without dead ends: 95 [2023-04-01 11:03:31,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=508, Invalid=1562, Unknown=0, NotChecked=0, Total=2070 [2023-04-01 11:03:31,476 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 94 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:03:31,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 86 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:03:31,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-04-01 11:03:31,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2023-04-01 11:03:31,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.0222222222222221) internal successors, (92), 90 states have internal predecessors, (92), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:31,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2023-04-01 11:03:31,499 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 42 [2023-04-01 11:03:31,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:03:31,499 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2023-04-01 11:03:31,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 33 states have internal predecessors, (59), 4 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:31,499 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2023-04-01 11:03:31,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-04-01 11:03:31,501 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:03:31,501 INFO L195 NwaCegarLoop]: trace histogram [29, 28, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:03:31,510 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-04-01 11:03:31,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:03:31,706 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:03:31,706 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:03:31,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1940309422, now seen corresponding path program 6 times [2023-04-01 11:03:31,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:03:31,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522547286] [2023-04-01 11:03:31,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:03:31,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:03:31,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:03:32,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2023-04-01 11:03:32,263 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:03:32,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522547286] [2023-04-01 11:03:32,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522547286] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:03:32,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666365043] [2023-04-01 11:03:32,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 11:03:32,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:03:32,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:03:32,264 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:03:32,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 11:03:32,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 11:03:32,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 11:03:32,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 28 conjunts are in the unsatisfiable core [2023-04-01 11:03:32,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:03:32,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2023-04-01 11:03:32,423 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:03:33,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2023-04-01 11:03:33,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666365043] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:03:33,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2049224846] [2023-04-01 11:03:33,164 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 11:03:33,164 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:03:33,164 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:03:33,164 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:03:33,164 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:03:33,200 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:03:33,318 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 66 for LOIs [2023-04-01 11:03:33,337 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:03:33,338 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:03:33,841 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2834#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (exists ((v_main_~i~0_BEFORE_CALL_9 Int) (|v_old(#valid)_BEFORE_CALL_7| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_7| (Array Int (Array Int Int))) (|v_old(#length)_BEFORE_CALL_7| (Array Int Int)) (|v_main_~#A~0.base_BEFORE_CALL_7| Int)) (and (= (select |v_old(#valid)_BEFORE_CALL_7| 1) 1) (not (= |v_main_~#A~0.base_BEFORE_CALL_7| 2)) (= (select |v_old(#valid)_BEFORE_CALL_7| 2) 1) (= (select |v_old(#valid)_BEFORE_CALL_7| 0) 0) (= 10 (select |v_old(#length)_BEFORE_CALL_7| 2)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 1) 1) 0) (not (= |v_main_~#A~0.base_BEFORE_CALL_7| 1)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 1) 0) 48) (= (select |v_old(#valid)_BEFORE_CALL_7| |v_main_~#A~0.base_BEFORE_CALL_7|) 0) (not (= (select |v_old(#memory_int)_BEFORE_CALL_7| 1) |v_old(#valid)_BEFORE_CALL_7|)) (not (= |v_main_~#A~0.base_BEFORE_CALL_7| |#StackHeapBarrier|)) (= 2 (select |v_old(#length)_BEFORE_CALL_7| 1)) (not (= |v_main_~#A~0.base_BEFORE_CALL_7| 0)) (< 1024 v_main_~i~0_BEFORE_CALL_9) (= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_7|) (* v_main_~i~0_BEFORE_CALL_9 4)) 0) (not (= (select |v_old(#memory_int)_BEFORE_CALL_7| 1) |v_old(#length)_BEFORE_CALL_7|)) (not (= |v_old(#valid)_BEFORE_CALL_7| |v_old(#length)_BEFORE_CALL_7|)))) (= |#NULL.base| 0))' at error location [2023-04-01 11:03:33,842 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:03:33,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:03:33,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 57 [2023-04-01 11:03:33,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001029889] [2023-04-01 11:03:33,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 11:03:33,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-04-01 11:03:33,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:03:33,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-04-01 11:03:33,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1623, Invalid=2799, Unknown=0, NotChecked=0, Total=4422 [2023-04-01 11:03:33,845 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand has 57 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 57 states have internal predecessors, (65), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:34,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:03:34,134 INFO L93 Difference]: Finished difference Result 264 states and 319 transitions. [2023-04-01 11:03:34,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-04-01 11:03:34,135 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 57 states have internal predecessors, (65), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2023-04-01 11:03:34,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:03:34,136 INFO L225 Difference]: With dead ends: 264 [2023-04-01 11:03:34,136 INFO L226 Difference]: Without dead ends: 201 [2023-04-01 11:03:34,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1623, Invalid=2799, Unknown=0, NotChecked=0, Total=4422 [2023-04-01 11:03:34,137 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 280 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 11:03:34,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 77 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 11:03:34,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-04-01 11:03:34,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 123. [2023-04-01 11:03:34,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.0169491525423728) internal successors, (120), 118 states have internal predecessors, (120), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:34,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2023-04-01 11:03:34,167 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 94 [2023-04-01 11:03:34,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:03:34,167 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2023-04-01 11:03:34,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 57 states have internal predecessors, (65), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:34,167 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2023-04-01 11:03:34,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-04-01 11:03:34,168 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:03:34,168 INFO L195 NwaCegarLoop]: trace histogram [54, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:03:34,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 11:03:34,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:03:34,373 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:03:34,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:03:34,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1728466834, now seen corresponding path program 7 times [2023-04-01 11:03:34,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:03:34,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938443029] [2023-04-01 11:03:34,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:03:34,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:03:34,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:03:36,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2297 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2023-04-01 11:03:36,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:03:36,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938443029] [2023-04-01 11:03:36,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938443029] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:03:36,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038641217] [2023-04-01 11:03:36,312 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 11:03:36,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:03:36,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:03:36,329 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:03:36,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 11:03:36,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:03:36,501 INFO L262 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 56 conjunts are in the unsatisfiable core [2023-04-01 11:03:36,524 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:03:36,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2297 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2023-04-01 11:03:36,595 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:03:38,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2297 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2023-04-01 11:03:38,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038641217] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:03:38,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1380595321] [2023-04-01 11:03:38,871 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 11:03:38,871 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:03:38,871 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:03:38,871 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:03:38,871 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:03:38,911 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:03:39,007 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 66 for LOIs [2023-04-01 11:03:39,024 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:03:39,028 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:03:39,714 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4336#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (exists ((|v_old(#memory_int)_BEFORE_CALL_8| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_8| (Array Int Int)) (v_main_~i~0_BEFORE_CALL_10 Int) (|v_old(#length)_BEFORE_CALL_8| (Array Int Int)) (|v_main_~#A~0.base_BEFORE_CALL_8| Int)) (and (not (= |v_old(#valid)_BEFORE_CALL_8| |v_old(#length)_BEFORE_CALL_8|)) (not (= |v_main_~#A~0.base_BEFORE_CALL_8| 0)) (= (select |v_old(#length)_BEFORE_CALL_8| 2) 10) (= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_8|) (* v_main_~i~0_BEFORE_CALL_10 4)) 0) (not (= |v_main_~#A~0.base_BEFORE_CALL_8| |#StackHeapBarrier|)) (not (= |v_old(#length)_BEFORE_CALL_8| (select |v_old(#memory_int)_BEFORE_CALL_8| 1))) (= (select |v_old(#valid)_BEFORE_CALL_8| 1) 1) (= (select |v_old(#length)_BEFORE_CALL_8| 1) 2) (= (select |v_old(#valid)_BEFORE_CALL_8| 0) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_8| 1) 0) 48) (not (= |v_old(#valid)_BEFORE_CALL_8| (select |v_old(#memory_int)_BEFORE_CALL_8| 1))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_8| 1) 1) 0) (< 1024 v_main_~i~0_BEFORE_CALL_10) (not (= |v_main_~#A~0.base_BEFORE_CALL_8| 2)) (= (select |v_old(#valid)_BEFORE_CALL_8| |v_main_~#A~0.base_BEFORE_CALL_8|) 0) (not (= |v_main_~#A~0.base_BEFORE_CALL_8| 1)) (= (select |v_old(#valid)_BEFORE_CALL_8| 2) 1))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:03:39,714 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:03:39,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:03:39,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 113 [2023-04-01 11:03:39,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907655111] [2023-04-01 11:03:39,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 11:03:39,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2023-04-01 11:03:39,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:03:39,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2023-04-01 11:03:39,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6355, Invalid=8651, Unknown=0, NotChecked=0, Total=15006 [2023-04-01 11:03:39,721 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand has 113 states, 113 states have (on average 1.0707964601769913) internal successors, (121), 113 states have internal predecessors, (121), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:41,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:03:41,128 INFO L93 Difference]: Finished difference Result 488 states and 627 transitions. [2023-04-01 11:03:41,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2023-04-01 11:03:41,128 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 1.0707964601769913) internal successors, (121), 113 states have internal predecessors, (121), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 122 [2023-04-01 11:03:41,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:03:41,129 INFO L225 Difference]: With dead ends: 488 [2023-04-01 11:03:41,129 INFO L226 Difference]: Without dead ends: 425 [2023-04-01 11:03:41,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1881 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=6355, Invalid=8651, Unknown=0, NotChecked=0, Total=15006 [2023-04-01 11:03:41,133 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 735 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 429 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 429 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 11:03:41,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [735 Valid, 129 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [429 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 11:03:41,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2023-04-01 11:03:41,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 179. [2023-04-01 11:03:41,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.0114942528735633) internal successors, (176), 174 states have internal predecessors, (176), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:41,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 180 transitions. [2023-04-01 11:03:41,178 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 180 transitions. Word has length 122 [2023-04-01 11:03:41,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:03:41,178 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 180 transitions. [2023-04-01 11:03:41,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 1.0707964601769913) internal successors, (121), 113 states have internal predecessors, (121), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:03:41,179 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 180 transitions. [2023-04-01 11:03:41,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-04-01 11:03:41,180 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:03:41,180 INFO L195 NwaCegarLoop]: trace histogram [110, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:03:41,185 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-04-01 11:03:41,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 11:03:41,386 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:03:41,386 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:03:41,386 INFO L85 PathProgramCache]: Analyzing trace with hash -123165202, now seen corresponding path program 8 times [2023-04-01 11:03:41,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:03:41,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966983750] [2023-04-01 11:03:41,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:03:41,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:03:41,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:03:46,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6917 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2023-04-01 11:03:46,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:03:46,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966983750] [2023-04-01 11:03:46,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966983750] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:03:46,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767212804] [2023-04-01 11:03:46,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 11:03:46,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:03:46,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:03:46,052 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:03:46,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process