/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/array-tiling/nr3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 08:50:50,357 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 08:50:50,362 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 08:50:50,400 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 08:50:50,401 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 08:50:50,403 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 08:50:50,406 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 08:50:50,408 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 08:50:50,410 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 08:50:50,414 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 08:50:50,416 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 08:50:50,417 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 08:50:50,418 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 08:50:50,420 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 08:50:50,421 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 08:50:50,422 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 08:50:50,423 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 08:50:50,424 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 08:50:50,426 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 08:50:50,431 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 08:50:50,432 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 08:50:50,433 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 08:50:50,434 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 08:50:50,435 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 08:50:50,443 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 08:50:50,443 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 08:50:50,444 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 08:50:50,445 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 08:50:50,445 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 08:50:50,446 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 08:50:50,446 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 08:50:50,447 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 08:50:50,448 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 08:50:50,449 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 08:50:50,450 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 08:50:50,450 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 08:50:50,450 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 08:50:50,450 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 08:50:50,451 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 08:50:50,451 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 08:50:50,452 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 08:50:50,453 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 08:50:50,481 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 08:50:50,481 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 08:50:50,482 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 08:50:50,482 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 08:50:50,483 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 08:50:50,483 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 08:50:50,483 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 08:50:50,484 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 08:50:50,484 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 08:50:50,484 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 08:50:50,485 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 08:50:50,485 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 08:50:50,485 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 08:50:50,485 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 08:50:50,485 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 08:50:50,486 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 08:50:50,486 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 08:50:50,486 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 08:50:50,487 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 08:50:50,487 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 08:50:50,487 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 08:50:50,487 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 08:50:50,487 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 08:50:50,487 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 08:50:50,488 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 08:50:50,488 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 08:50:50,488 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 08:50:50,488 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 08:50:50,488 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 08:50:50,489 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 08:50:50,489 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 08:50:50,489 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 08:50:50,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 08:50:50,489 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 08:50:50,490 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 08:50:50,490 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 08:50:50,490 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 08:50:50,490 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 08:50:50,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 08:50:50,490 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 08:50:50,491 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 08:50:50,491 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 08:50:50,723 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 08:50:50,743 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 08:50:50,745 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 08:50:50,746 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 08:50:50,747 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 08:50:50,748 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/nr3.c [2023-04-01 08:50:51,887 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 08:50:52,045 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 08:50:52,046 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/nr3.c [2023-04-01 08:50:52,051 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e7557280/12b74ed7f8284cf1a7af32c6d092e63e/FLAGa4bddfe7d [2023-04-01 08:50:52,067 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e7557280/12b74ed7f8284cf1a7af32c6d092e63e [2023-04-01 08:50:52,069 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 08:50:52,072 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 08:50:52,074 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 08:50:52,074 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 08:50:52,077 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 08:50:52,078 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:50:52" (1/1) ... [2023-04-01 08:50:52,079 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46a54d98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:50:52, skipping insertion in model container [2023-04-01 08:50:52,080 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:50:52" (1/1) ... [2023-04-01 08:50:52,086 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 08:50:52,103 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 08:50:52,238 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/nr3.c[394,407] [2023-04-01 08:50:52,259 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 08:50:52,268 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 08:50:52,281 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/nr3.c[394,407] [2023-04-01 08:50:52,291 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 08:50:52,302 INFO L208 MainTranslator]: Completed translation [2023-04-01 08:50:52,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:50:52 WrapperNode [2023-04-01 08:50:52,302 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 08:50:52,303 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 08:50:52,303 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 08:50:52,303 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 08:50:52,311 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:50:52" (1/1) ... [2023-04-01 08:50:52,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:50:52" (1/1) ... [2023-04-01 08:50:52,328 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:50:52" (1/1) ... [2023-04-01 08:50:52,328 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:50:52" (1/1) ... [2023-04-01 08:50:52,334 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:50:52" (1/1) ... [2023-04-01 08:50:52,338 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:50:52" (1/1) ... [2023-04-01 08:50:52,340 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:50:52" (1/1) ... [2023-04-01 08:50:52,341 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:50:52" (1/1) ... [2023-04-01 08:50:52,343 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 08:50:52,344 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 08:50:52,344 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 08:50:52,344 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 08:50:52,345 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:50:52" (1/1) ... [2023-04-01 08:50:52,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 08:50:52,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:50:52,373 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 08:50:52,386 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 08:50:52,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 08:50:52,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 08:50:52,412 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 08:50:52,412 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 08:50:52,413 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 08:50:52,413 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 08:50:52,413 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 08:50:52,413 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 08:50:52,413 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 08:50:52,413 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 08:50:52,413 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 08:50:52,413 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 08:50:52,413 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 08:50:52,413 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 08:50:52,414 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 08:50:52,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 08:50:52,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 08:50:52,414 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 08:50:52,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 08:50:52,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 08:50:52,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 08:50:52,471 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 08:50:52,473 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 08:50:52,613 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 08:50:52,678 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 08:50:52,678 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 08:50:52,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:50:52 BoogieIcfgContainer [2023-04-01 08:50:52,680 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 08:50:52,684 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 08:50:52,684 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 08:50:52,687 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 08:50:52,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 08:50:52" (1/3) ... [2023-04-01 08:50:52,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67add2fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:50:52, skipping insertion in model container [2023-04-01 08:50:52,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:50:52" (2/3) ... [2023-04-01 08:50:52,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67add2fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:50:52, skipping insertion in model container [2023-04-01 08:50:52,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:50:52" (3/3) ... [2023-04-01 08:50:52,693 INFO L112 eAbstractionObserver]: Analyzing ICFG nr3.c [2023-04-01 08:50:52,707 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 08:50:52,707 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 08:50:52,766 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 08:50:52,774 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;@7357f15e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 08:50:52,774 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 08:50:52,778 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:50:52,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-01 08:50:52,787 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:50:52,788 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:50:52,789 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:50:52,796 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:50:52,796 INFO L85 PathProgramCache]: Analyzing trace with hash -340327685, now seen corresponding path program 1 times [2023-04-01 08:50:52,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:50:52,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081170410] [2023-04-01 08:50:52,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:50:52,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:50:52,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:50:53,431 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 08:50:53,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:50:53,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081170410] [2023-04-01 08:50:53,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081170410] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 08:50:53,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 08:50:53,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 08:50:53,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234287365] [2023-04-01 08:50:53,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 08:50:53,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 08:50:53,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:50:53,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 08:50:53,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-01 08:50:53,481 INFO L87 Difference]: Start difference. First operand has 27 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 08:50:53,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:50:53,594 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2023-04-01 08:50:53,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 08:50:53,597 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2023-04-01 08:50:53,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:50:53,602 INFO L225 Difference]: With dead ends: 52 [2023-04-01 08:50:53,603 INFO L226 Difference]: Without dead ends: 24 [2023-04-01 08:50:53,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-01 08:50:53,609 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:50:53,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 60 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 08:50:53,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-04-01 08:50:53,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2023-04-01 08:50:53,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 08:50:53,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2023-04-01 08:50:53,640 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 17 [2023-04-01 08:50:53,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:50:53,641 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2023-04-01 08:50:53,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 08:50:53,641 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2023-04-01 08:50:53,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-01 08:50:53,642 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:50:53,642 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:50:53,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 08:50:53,642 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:50:53,643 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:50:53,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1992780016, now seen corresponding path program 1 times [2023-04-01 08:50:53,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:50:53,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587932169] [2023-04-01 08:50:53,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:50:53,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:50:53,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:50:53,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:50:53,709 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:50:53,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587932169] [2023-04-01 08:50:53,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587932169] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 08:50:53,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 08:50:53,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 08:50:53,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595104921] [2023-04-01 08:50:53,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 08:50:53,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 08:50:53,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:50:53,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 08:50:53,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 08:50:53,712 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 08:50:53,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:50:53,732 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2023-04-01 08:50:53,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 08:50:53,732 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2023-04-01 08:50:53,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:50:53,733 INFO L225 Difference]: With dead ends: 35 [2023-04-01 08:50:53,733 INFO L226 Difference]: Without dead ends: 24 [2023-04-01 08:50:53,734 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 08:50:53,735 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:50:53,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:50:53,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-04-01 08:50:53,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-04-01 08:50:53,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 08:50:53,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2023-04-01 08:50:53,742 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2023-04-01 08:50:53,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:50:53,743 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2023-04-01 08:50:53,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 08:50:53,743 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2023-04-01 08:50:53,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 08:50:53,743 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:50:53,744 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:50:53,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 08:50:53,744 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:50:53,744 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:50:53,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1019763640, now seen corresponding path program 1 times [2023-04-01 08:50:53,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:50:53,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801447813] [2023-04-01 08:50:53,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:50:53,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:50:53,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:50:53,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:50:53,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:50:53,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801447813] [2023-04-01 08:50:53,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801447813] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:50:53,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462960641] [2023-04-01 08:50:53,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:50:53,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:50:53,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:50:53,820 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 08:50:53,833 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 08:50:53,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:50:53,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 08:50:53,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:50:53,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:50:53,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:50:54,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:50:54,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462960641] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:50:54,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [445978988] [2023-04-01 08:50:54,048 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 08:50:54,048 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:50:54,051 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:50:54,055 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:50:54,055 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:50:54,309 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 79 for LOIs [2023-04-01 08:50:58,889 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 120 for LOIs [2023-04-01 08:50:59,011 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 94 for LOIs [2023-04-01 08:50:59,030 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 08:50:59,037 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:51:01,258 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '354#(and (= (mod ~CELLCOUNT~0 3) 0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (< 0 ~CELLCOUNT~0) (exists ((|v_old(#length)_BEFORE_CALL_3| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_3| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_3| (Array Int Int)) (|v_main_~#volArray~0.base_BEFORE_CALL_3| Int)) (and (not (= (select |v_old(#memory_int)_BEFORE_CALL_3| 2) |v_old(#length)_BEFORE_CALL_3|)) (= (select |v_old(#valid)_BEFORE_CALL_3| |v_main_~#volArray~0.base_BEFORE_CALL_3|) 0) (not (= (select (select |#memory_int| |v_main_~#volArray~0.base_BEFORE_CALL_3|) 0) 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 5) 0) (not (= |v_main_~#volArray~0.base_BEFORE_CALL_3| 0)) (= 51 (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 2)) (= (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) (not (= |v_old(#valid)_BEFORE_CALL_3| |v_old(#length)_BEFORE_CALL_3|)) (not (= |v_main_~#volArray~0.base_BEFORE_CALL_3| 1)) (= 46 (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 3)) (= (select |v_old(#length)_BEFORE_CALL_3| 2) 6) (= 114 (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 1)) (= 2 (select |v_old(#length)_BEFORE_CALL_3| 1)) (= (select |v_old(#length)_BEFORE_CALL_3| 3) 12) (not (= |v_old(#length)_BEFORE_CALL_3| (select |v_old(#memory_int)_BEFORE_CALL_3| 1))) (< (select (select |#memory_int| |v_main_~#volArray~0.base_BEFORE_CALL_3|) 0) 2) (not (= (select |v_old(#memory_int)_BEFORE_CALL_3| 2) |v_old(#valid)_BEFORE_CALL_3|)) (= 110 (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 0)) (not (= |v_old(#valid)_BEFORE_CALL_3| (select |v_old(#memory_int)_BEFORE_CALL_3| 1))) (= (select |v_old(#valid)_BEFORE_CALL_3| 2) 1) (not (= |v_main_~#volArray~0.base_BEFORE_CALL_3| 2)) (not (= |v_main_~#volArray~0.base_BEFORE_CALL_3| |#StackHeapBarrier|)) (= (select |v_old(#valid)_BEFORE_CALL_3| 1) 1) (not (= |v_main_~#volArray~0.base_BEFORE_CALL_3| 3)) (= (select |v_old(#valid)_BEFORE_CALL_3| 3) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 4) 99) (not (= (select |v_old(#memory_int)_BEFORE_CALL_3| 2) (select |v_old(#memory_int)_BEFORE_CALL_3| 1))))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 08:51:01,258 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:51:01,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:51:01,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2023-04-01 08:51:01,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362180120] [2023-04-01 08:51:01,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:51:01,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 08:51:01,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:51:01,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 08:51:01,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=401, Unknown=2, NotChecked=0, Total=462 [2023-04-01 08:51:01,263 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 08:51:01,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:51:01,294 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2023-04-01 08:51:01,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 08:51:01,295 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2023-04-01 08:51:01,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:51:01,295 INFO L225 Difference]: With dead ends: 38 [2023-04-01 08:51:01,295 INFO L226 Difference]: Without dead ends: 26 [2023-04-01 08:51:01,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=59, Invalid=401, Unknown=2, NotChecked=0, Total=462 [2023-04-01 08:51:01,297 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:51:01,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:51:01,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-04-01 08:51:01,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-04-01 08:51:01,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 08:51:01,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2023-04-01 08:51:01,303 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 20 [2023-04-01 08:51:01,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:51:01,303 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2023-04-01 08:51:01,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 08:51:01,304 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2023-04-01 08:51:01,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 08:51:01,304 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:51:01,304 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:51:01,318 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 08:51:01,516 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 08:51:01,516 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:51:01,516 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:51:01,517 INFO L85 PathProgramCache]: Analyzing trace with hash -165832376, now seen corresponding path program 2 times [2023-04-01 08:51:01,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:51:01,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601880607] [2023-04-01 08:51:01,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:51:01,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:51:01,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:51:02,360 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:51:02,361 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:51:02,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601880607] [2023-04-01 08:51:02,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601880607] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:51:02,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918666705] [2023-04-01 08:51:02,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 08:51:02,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:51:02,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:51:02,366 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 08:51:02,368 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 08:51:02,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-01 08:51:02,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:51:02,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 37 conjunts are in the unsatisfiable core [2023-04-01 08:51:02,436 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:51:02,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 08:51:02,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 08:51:02,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 46 [2023-04-01 08:51:02,675 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-04-01 08:51:02,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 26 [2023-04-01 08:51:02,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-04-01 08:51:02,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2023-04-01 08:51:02,892 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:51:02,892 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:51:03,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-04-01 08:51:08,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2023-04-01 08:51:08,145 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 08:51:08,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 49 [2023-04-01 08:51:08,155 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 08:51:08,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2023-04-01 08:51:08,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 83 [2023-04-01 08:51:08,193 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 08:51:08,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 324 treesize of output 317 [2023-04-01 08:51:08,449 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:51:08,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918666705] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:51:08,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1934394995] [2023-04-01 08:51:08,451 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 08:51:08,451 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:51:08,451 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:51:08,452 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:51:08,452 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:51:08,527 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 79 for LOIs [2023-04-01 08:51:11,731 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 120 for LOIs [2023-04-01 08:51:11,817 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 94 for LOIs [2023-04-01 08:51:11,829 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 08:51:11,834 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:51:13,842 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '633#(and (= (mod ~CELLCOUNT~0 3) 0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (< 0 ~CELLCOUNT~0) (= |#NULL.offset| 0) (exists ((|v_old(#valid)_BEFORE_CALL_7| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_7| (Array Int (Array Int Int))) (|v_main_~#volArray~0.base_BEFORE_CALL_7| Int) (|v_old(#length)_BEFORE_CALL_7| (Array Int Int))) (and (= (select |v_old(#valid)_BEFORE_CALL_7| 1) 1) (not (= |v_main_~#volArray~0.base_BEFORE_CALL_7| 1)) (= (select |v_old(#valid)_BEFORE_CALL_7| |v_main_~#volArray~0.base_BEFORE_CALL_7|) 0) (not (= |v_main_~#volArray~0.base_BEFORE_CALL_7| 3)) (= (select |v_old(#valid)_BEFORE_CALL_7| 2) 1) (not (= |v_main_~#volArray~0.base_BEFORE_CALL_7| 0)) (not (= (select (select |#memory_int| |v_main_~#volArray~0.base_BEFORE_CALL_7|) 0) 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 0) 110) (= (select |v_old(#valid)_BEFORE_CALL_7| 0) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 1) 1) 0) (= 51 (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 2)) (= 46 (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 3)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 1) 0) 48) (= (select |v_old(#valid)_BEFORE_CALL_7| 3) 1) (< (select (select |#memory_int| |v_main_~#volArray~0.base_BEFORE_CALL_7|) 0) 2) (= 99 (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 4)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_7| 1) |v_old(#valid)_BEFORE_CALL_7|)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_7| 2) |v_old(#length)_BEFORE_CALL_7|)) (not (= |v_main_~#volArray~0.base_BEFORE_CALL_7| 2)) (= 2 (select |v_old(#length)_BEFORE_CALL_7| 1)) (= 114 (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 1)) (= 0 (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 5)) (= (select |v_old(#length)_BEFORE_CALL_7| 3) 12) (not (= (select |v_old(#memory_int)_BEFORE_CALL_7| 1) |v_old(#length)_BEFORE_CALL_7|)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_7| 2) |v_old(#valid)_BEFORE_CALL_7|)) (not (= |v_main_~#volArray~0.base_BEFORE_CALL_7| |#StackHeapBarrier|)) (not (= |v_old(#valid)_BEFORE_CALL_7| |v_old(#length)_BEFORE_CALL_7|)) (= 6 (select |v_old(#length)_BEFORE_CALL_7| 2)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_7| 1) (select |v_old(#memory_int)_BEFORE_CALL_7| 2))))) (= |#NULL.base| 0))' at error location [2023-04-01 08:51:13,842 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:51:13,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:51:13,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 15] total 34 [2023-04-01 08:51:13,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411393191] [2023-04-01 08:51:13,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:51:13,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-04-01 08:51:13,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:51:13,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-04-01 08:51:13,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=2165, Unknown=4, NotChecked=0, Total=2450 [2023-04-01 08:51:13,846 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 34 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:51:33,253 WARN L223 SmtUtils]: Spent 17.10s on a formula simplification. DAG size of input: 40 DAG size of output: 36 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 08:51:35,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-01 08:51:48,915 WARN L223 SmtUtils]: Spent 8.84s on a formula simplification. DAG size of input: 37 DAG size of output: 36 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 08:51:50,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-01 08:51:53,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-01 08:51:55,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-04-01 08:51:55,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:51:55,956 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2023-04-01 08:51:55,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-01 08:51:55,957 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 22 [2023-04-01 08:51:55,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:51:55,959 INFO L225 Difference]: With dead ends: 62 [2023-04-01 08:51:55,960 INFO L226 Difference]: Without dead ends: 60 [2023-04-01 08:51:55,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1524 ImplicationChecksByTransitivity, 40.6s TimeCoverageRelationStatistics Valid=569, Invalid=3846, Unknown=7, NotChecked=0, Total=4422 [2023-04-01 08:51:55,963 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 132 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 82 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:51:55,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 137 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 301 Invalid, 4 Unknown, 0 Unchecked, 9.0s Time] [2023-04-01 08:51:55,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-04-01 08:51:55,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 32. [2023-04-01 08:51:55,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:51:55,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2023-04-01 08:51:55,975 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 22 [2023-04-01 08:51:55,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:51:55,975 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2023-04-01 08:51:55,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:51:55,976 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2023-04-01 08:51:55,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 08:51:55,976 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:51:55,976 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:51:55,985 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 08:51:56,182 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 08:51:56,182 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:51:56,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:51:56,183 INFO L85 PathProgramCache]: Analyzing trace with hash -632503624, now seen corresponding path program 1 times [2023-04-01 08:51:56,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:51:56,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104953647] [2023-04-01 08:51:56,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:51:56,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:51:56,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:51:56,774 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:51:56,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:51:56,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104953647] [2023-04-01 08:51:56,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104953647] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:51:56,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473278974] [2023-04-01 08:51:56,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:51:56,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:51:56,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:51:56,778 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 08:51:56,780 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 08:51:56,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:51:56,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 36 conjunts are in the unsatisfiable core [2023-04-01 08:51:56,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:51:56,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-04-01 08:51:56,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 08:51:56,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-04-01 08:51:57,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2023-04-01 08:51:57,130 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:51:57,130 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:51:57,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9