/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/array-examples/standard_compareModified_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 13:54:22,470 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 13:54:22,471 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 13:54:22,501 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 13:54:22,501 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 13:54:22,503 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 13:54:22,506 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 13:54:22,507 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 13:54:22,508 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 13:54:22,512 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 13:54:22,513 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 13:54:22,514 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 13:54:22,514 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 13:54:22,516 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 13:54:22,517 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 13:54:22,517 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 13:54:22,518 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 13:54:22,518 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 13:54:22,520 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 13:54:22,523 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 13:54:22,524 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 13:54:22,525 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 13:54:22,526 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 13:54:22,526 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 13:54:22,533 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 13:54:22,533 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 13:54:22,533 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 13:54:22,534 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 13:54:22,534 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 13:54:22,535 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 13:54:22,535 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 13:54:22,535 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 13:54:22,536 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 13:54:22,537 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 13:54:22,537 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 13:54:22,537 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 13:54:22,537 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 13:54:22,538 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 13:54:22,538 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 13:54:22,538 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 13:54:22,539 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 13:54:22,540 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 [2023-04-02 13:54:22,560 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 13:54:22,561 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 13:54:22,561 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 13:54:22,561 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 13:54:22,562 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 13:54:22,562 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 13:54:22,562 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 13:54:22,562 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 13:54:22,562 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 13:54:22,562 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 13:54:22,563 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 13:54:22,563 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 13:54:22,563 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 13:54:22,563 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 13:54:22,563 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 13:54:22,563 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 13:54:22,563 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 13:54:22,563 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 13:54:22,564 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 13:54:22,564 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 13:54:22,564 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 13:54:22,564 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 13:54:22,564 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 13:54:22,564 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 13:54:22,564 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 13:54:22,564 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 13:54:22,564 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 13:54:22,564 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 13:54:22,564 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 13:54:22,564 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 13:54:22,565 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 13:54:22,565 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 13:54:22,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 13:54:22,565 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 13:54:22,565 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 13:54:22,565 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 13:54:22,565 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 13:54:22,565 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 13:54:22,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 13:54:22,565 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 13:54:22,565 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 13:54:22,566 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 13:54:22,760 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 13:54:22,783 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 13:54:22,787 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 13:54:22,788 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 13:54:22,788 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 13:54:22,789 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_compareModified_ground.i [2023-04-02 13:54:23,736 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 13:54:23,928 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 13:54:23,928 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_compareModified_ground.i [2023-04-02 13:54:23,932 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab89bfac9/664dfc0878584371bce1a282c79b1869/FLAG3c2585f9e [2023-04-02 13:54:23,949 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab89bfac9/664dfc0878584371bce1a282c79b1869 [2023-04-02 13:54:23,951 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 13:54:23,952 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 13:54:23,954 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 13:54:23,955 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 13:54:23,957 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 13:54:23,957 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:54:23" (1/1) ... [2023-04-02 13:54:23,958 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@347dad56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:23, skipping insertion in model container [2023-04-02 13:54:23,958 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:54:23" (1/1) ... [2023-04-02 13:54:23,963 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 13:54:23,975 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 13:54:24,062 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-examples/standard_compareModified_ground.i[824,837] [2023-04-02 13:54:24,073 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 13:54:24,079 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 13:54:24,087 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-examples/standard_compareModified_ground.i[824,837] [2023-04-02 13:54:24,091 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 13:54:24,100 INFO L208 MainTranslator]: Completed translation [2023-04-02 13:54:24,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:24 WrapperNode [2023-04-02 13:54:24,100 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 13:54:24,101 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 13:54:24,101 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 13:54:24,101 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 13:54:24,108 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:24" (1/1) ... [2023-04-02 13:54:24,109 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:24" (1/1) ... [2023-04-02 13:54:24,113 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:24" (1/1) ... [2023-04-02 13:54:24,113 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:24" (1/1) ... [2023-04-02 13:54:24,117 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:24" (1/1) ... [2023-04-02 13:54:24,120 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:24" (1/1) ... [2023-04-02 13:54:24,120 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:24" (1/1) ... [2023-04-02 13:54:24,121 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:24" (1/1) ... [2023-04-02 13:54:24,122 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 13:54:24,123 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 13:54:24,123 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 13:54:24,123 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 13:54:24,124 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:24" (1/1) ... [2023-04-02 13:54:24,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 13:54:24,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:54:24,150 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) [2023-04-02 13:54:24,155 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 [2023-04-02 13:54:24,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 13:54:24,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 13:54:24,172 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 13:54:24,172 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 13:54:24,173 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 13:54:24,173 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 13:54:24,173 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 13:54:24,173 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-02 13:54:24,173 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-02 13:54:24,173 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 13:54:24,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 13:54:24,173 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 13:54:24,173 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 13:54:24,173 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 13:54:24,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-02 13:54:24,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 13:54:24,173 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 13:54:24,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 13:54:24,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 13:54:24,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 13:54:24,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 13:54:24,221 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 13:54:24,222 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 13:54:24,350 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 13:54:24,406 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 13:54:24,406 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-04-02 13:54:24,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:54:24 BoogieIcfgContainer [2023-04-02 13:54:24,408 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 13:54:24,410 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 13:54:24,410 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 13:54:24,412 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 13:54:24,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 01:54:23" (1/3) ... [2023-04-02 13:54:24,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@113bcbe2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:54:24, skipping insertion in model container [2023-04-02 13:54:24,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:54:24" (2/3) ... [2023-04-02 13:54:24,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@113bcbe2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:54:24, skipping insertion in model container [2023-04-02 13:54:24,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:54:24" (3/3) ... [2023-04-02 13:54:24,413 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_compareModified_ground.i [2023-04-02 13:54:24,424 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 13:54:24,424 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 13:54:24,463 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 13:54:24,469 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;@62bcd3b5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 13:54:24,470 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 13:54:24,473 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 13:54:24,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-02 13:54:24,478 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:24,479 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:54:24,479 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:24,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:24,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1932088670, now seen corresponding path program 1 times [2023-04-02 13:54:24,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:24,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315040955] [2023-04-02 13:54:24,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:24,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:24,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:24,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 13:54:24,662 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:24,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315040955] [2023-04-02 13:54:24,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315040955] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 13:54:24,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 13:54:24,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 13:54:24,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967308032] [2023-04-02 13:54:24,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 13:54:24,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 13:54:24,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:54:24,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 13:54:24,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 13:54:24,692 INFO L87 Difference]: Start difference. First operand has 24 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2023-04-02 13:54:24,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:54:24,748 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2023-04-02 13:54:24,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 13:54:24,750 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 13 [2023-04-02 13:54:24,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:54:24,755 INFO L225 Difference]: With dead ends: 43 [2023-04-02 13:54:24,755 INFO L226 Difference]: Without dead ends: 22 [2023-04-02 13:54:24,757 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 [2023-04-02 13:54:24,759 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 13:54:24,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 13:54:24,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-04-02 13:54:24,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-04-02 13:54:24,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 13:54:24,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2023-04-02 13:54:24,789 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 13 [2023-04-02 13:54:24,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:54:24,790 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2023-04-02 13:54:24,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2023-04-02 13:54:24,791 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2023-04-02 13:54:24,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-02 13:54:24,792 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:24,792 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:54:24,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 13:54:24,793 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:24,794 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:24,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1165184082, now seen corresponding path program 1 times [2023-04-02 13:54:24,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:24,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549379077] [2023-04-02 13:54:24,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:24,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:24,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:24,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 13:54:24,872 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:24,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549379077] [2023-04-02 13:54:24,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549379077] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 13:54:24,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 13:54:24,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 13:54:24,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012804851] [2023-04-02 13:54:24,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 13:54:24,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 13:54:24,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:54:24,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 13:54:24,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 13:54:24,874 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2023-04-02 13:54:24,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:54:24,892 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2023-04-02 13:54:24,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 13:54:24,892 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 14 [2023-04-02 13:54:24,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:54:24,893 INFO L225 Difference]: With dead ends: 37 [2023-04-02 13:54:24,893 INFO L226 Difference]: Without dead ends: 23 [2023-04-02 13:54:24,893 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 [2023-04-02 13:54:24,894 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 13:54:24,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 13:54:24,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-04-02 13:54:24,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-04-02 13:54:24,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 13:54:24,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2023-04-02 13:54:24,898 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 14 [2023-04-02 13:54:24,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:54:24,898 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2023-04-02 13:54:24,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2023-04-02 13:54:24,898 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2023-04-02 13:54:24,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-02 13:54:24,899 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:24,899 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:54:24,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 13:54:24,899 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:24,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:24,899 INFO L85 PathProgramCache]: Analyzing trace with hash 838221224, now seen corresponding path program 1 times [2023-04-02 13:54:24,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:24,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950437671] [2023-04-02 13:54:24,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:24,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:24,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:25,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 13:54:25,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:25,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950437671] [2023-04-02 13:54:25,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950437671] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:54:25,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575084796] [2023-04-02 13:54:25,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:25,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:25,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:54:25,034 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) [2023-04-02 13:54:25,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 13:54:25,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:25,112 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 13:54:25,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:54:25,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 13:54:25,142 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:54:25,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 13:54:25,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575084796] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:54:25,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1751358065] [2023-04-02 13:54:25,173 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-04-02 13:54:25,173 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:54:25,176 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:54:25,179 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:54:25,179 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:54:25,228 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:54:25,610 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 13:54:25,651 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:54:25,657 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:54:26,276 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '313#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#b~0.base_BEFORE_CALL_1| Int) (|v_main_~#a~0.base_BEFORE_CALL_1| Int)) (and (<= 2 |v_main_~#a~0.base_BEFORE_CALL_1|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_1|) (<= 3 (+ |v_main_~#b~0.base_BEFORE_CALL_1| |#StackHeapBarrier|)) (<= 4 (+ |v_main_~#b~0.base_BEFORE_CALL_1| |v_main_~#a~0.base_BEFORE_CALL_1|)) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_1|)) (not (= (select (select |#memory_int| |v_main_~#b~0.base_BEFORE_CALL_1|) 0) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_1|) 0))) (<= (+ |#StackHeapBarrier| 1) |v_main_~#b~0.base_BEFORE_CALL_1|) (<= 2 |v_main_~#b~0.base_BEFORE_CALL_1|))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 13:54:26,276 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:54:26,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:54:26,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-02 13:54:26,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82097245] [2023-04-02 13:54:26,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:54:26,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 13:54:26,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:54:26,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 13:54:26,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2023-04-02 13:54:26,278 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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) [2023-04-02 13:54:26,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:54:26,312 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2023-04-02 13:54:26,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 13:54:26,313 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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 [2023-04-02 13:54:26,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:54:26,314 INFO L225 Difference]: With dead ends: 42 [2023-04-02 13:54:26,314 INFO L226 Difference]: Without dead ends: 26 [2023-04-02 13:54:26,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2023-04-02 13:54:26,316 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 13:54:26,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 52 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 13:54:26,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-04-02 13:54:26,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-04-02 13:54:26,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 13:54:26,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2023-04-02 13:54:26,320 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 15 [2023-04-02 13:54:26,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:54:26,320 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2023-04-02 13:54:26,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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) [2023-04-02 13:54:26,320 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2023-04-02 13:54:26,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-02 13:54:26,320 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:26,320 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:54:26,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 13:54:26,527 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 [2023-04-02 13:54:26,528 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:26,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:26,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1048363528, now seen corresponding path program 2 times [2023-04-02 13:54:26,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:26,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346610334] [2023-04-02 13:54:26,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:26,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:26,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:26,603 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 13:54:26,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:26,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346610334] [2023-04-02 13:54:26,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346610334] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:54:26,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160505191] [2023-04-02 13:54:26,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 13:54:26,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:26,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:54:26,604 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) [2023-04-02 13:54:26,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 13:54:26,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-02 13:54:26,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:54:26,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 13:54:26,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:54:26,680 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 13:54:26,680 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:54:26,696 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 13:54:26,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160505191] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:54:26,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1962697041] [2023-04-02 13:54:26,698 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-04-02 13:54:26,698 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:54:26,699 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:54:26,699 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:54:26,699 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:54:26,712 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:54:26,878 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 13:54:26,893 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:54:26,897 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:54:27,382 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '544#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#a~0.base_BEFORE_CALL_2| Int) (|v_main_~#b~0.base_BEFORE_CALL_2| Int)) (and (not (= (select (select |#memory_int| |v_main_~#b~0.base_BEFORE_CALL_2|) 0) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_2|) 0))) (<= 3 (+ |v_main_~#b~0.base_BEFORE_CALL_2| |#StackHeapBarrier|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#b~0.base_BEFORE_CALL_2|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_2|) (<= 2 |v_main_~#b~0.base_BEFORE_CALL_2|) (<= 4 (+ |v_main_~#b~0.base_BEFORE_CALL_2| |v_main_~#a~0.base_BEFORE_CALL_2|)) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_2|)) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_2|))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 13:54:27,382 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:54:27,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:54:27,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-02 13:54:27,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614222823] [2023-04-02 13:54:27,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:54:27,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 13:54:27,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:54:27,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 13:54:27,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2023-04-02 13:54:27,384 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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) [2023-04-02 13:54:27,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:54:27,412 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2023-04-02 13:54:27,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 13:54:27,413 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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 18 [2023-04-02 13:54:27,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:54:27,414 INFO L225 Difference]: With dead ends: 43 [2023-04-02 13:54:27,414 INFO L226 Difference]: Without dead ends: 29 [2023-04-02 13:54:27,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2023-04-02 13:54:27,415 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 13:54:27,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 69 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 13:54:27,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-04-02 13:54:27,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-04-02 13:54:27,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 13:54:27,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2023-04-02 13:54:27,418 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 18 [2023-04-02 13:54:27,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:54:27,418 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2023-04-02 13:54:27,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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) [2023-04-02 13:54:27,418 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2023-04-02 13:54:27,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-02 13:54:27,419 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:27,419 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:54:27,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 13:54:27,624 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 [2023-04-02 13:54:27,624 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:27,624 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:27,624 INFO L85 PathProgramCache]: Analyzing trace with hash 924041182, now seen corresponding path program 3 times [2023-04-02 13:54:27,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:27,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976535682] [2023-04-02 13:54:27,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:27,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:27,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:27,749 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 13:54:27,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:27,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976535682] [2023-04-02 13:54:27,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976535682] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:54:27,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328335766] [2023-04-02 13:54:27,749 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 13:54:27,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:27,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:54:27,750 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) [2023-04-02 13:54:27,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 13:54:27,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 13:54:27,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:54:27,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 13:54:27,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:54:27,840 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 13:54:27,840 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:54:27,878 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 13:54:27,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328335766] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:54:27,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1447094752] [2023-04-02 13:54:27,893 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-04-02 13:54:27,893 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:54:27,893 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:54:27,893 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:54:27,893 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:54:27,904 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:54:28,015 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 13:54:28,025 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:54:28,027 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:54:28,521 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '807#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#a~0.base_BEFORE_CALL_3| Int) (|v_main_~#b~0.base_BEFORE_CALL_3| Int)) (and (not (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_3|) 0) (select (select |#memory_int| |v_main_~#b~0.base_BEFORE_CALL_3|) 0))) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_3|) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_3|) (<= 3 (+ |v_main_~#b~0.base_BEFORE_CALL_3| |#StackHeapBarrier|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#b~0.base_BEFORE_CALL_3|) (<= 4 (+ |v_main_~#b~0.base_BEFORE_CALL_3| |v_main_~#a~0.base_BEFORE_CALL_3|)) (<= 2 |v_main_~#b~0.base_BEFORE_CALL_3|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_3|)))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 13:54:28,521 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:54:28,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:54:28,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-04-02 13:54:28,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908753806] [2023-04-02 13:54:28,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:54:28,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-02 13:54:28,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:54:28,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-02 13:54:28,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2023-04-02 13:54:28,523 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 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) [2023-04-02 13:54:28,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:54:28,563 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2023-04-02 13:54:28,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 13:54:28,563 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 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 21 [2023-04-02 13:54:28,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:54:28,564 INFO L225 Difference]: With dead ends: 54 [2023-04-02 13:54:28,564 INFO L226 Difference]: Without dead ends: 35 [2023-04-02 13:54:28,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2023-04-02 13:54:28,565 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 13:54:28,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 69 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 13:54:28,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-04-02 13:54:28,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-04-02 13:54:28,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 13:54:28,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2023-04-02 13:54:28,568 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 21 [2023-04-02 13:54:28,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:54:28,568 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2023-04-02 13:54:28,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 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) [2023-04-02 13:54:28,569 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2023-04-02 13:54:28,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-02 13:54:28,569 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:28,569 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:54:28,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-02 13:54:28,774 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 [2023-04-02 13:54:28,774 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:28,774 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:28,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1495687714, now seen corresponding path program 4 times [2023-04-02 13:54:28,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:28,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933662305] [2023-04-02 13:54:28,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:28,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:28,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:28,930 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 13:54:28,930 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:28,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933662305] [2023-04-02 13:54:28,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933662305] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:54:28,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592977908] [2023-04-02 13:54:28,931 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 13:54:28,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:28,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:54:28,932 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) [2023-04-02 13:54:28,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 13:54:29,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:29,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 13:54:29,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:54:29,049 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 13:54:29,049 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:54:29,207 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 13:54:29,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592977908] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:54:29,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [860109907] [2023-04-02 13:54:29,208 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-04-02 13:54:29,208 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:54:29,208 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:54:29,208 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:54:29,209 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:54:29,232 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:54:29,368 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 13:54:29,378 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:54:29,381 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:54:29,901 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1152#(and (exists ((|v_main_~#a~0.base_BEFORE_CALL_4| Int) (|v_main_~#b~0.base_BEFORE_CALL_4| Int)) (and (<= (+ |#StackHeapBarrier| 1) |v_main_~#b~0.base_BEFORE_CALL_4|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_4|) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_4|) (<= 3 (+ |v_main_~#b~0.base_BEFORE_CALL_4| |#StackHeapBarrier|)) (<= 4 (+ |v_main_~#b~0.base_BEFORE_CALL_4| |v_main_~#a~0.base_BEFORE_CALL_4|)) (<= 2 |v_main_~#b~0.base_BEFORE_CALL_4|) (not (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_4|) 0) (select (select |#memory_int| |v_main_~#b~0.base_BEFORE_CALL_4|) 0))) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_4|)))) (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 13:54:29,902 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:54:29,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:54:29,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-04-02 13:54:29,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767017820] [2023-04-02 13:54:29,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:54:29,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-02 13:54:29,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:54:29,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-02 13:54:29,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=989, Unknown=0, NotChecked=0, Total=1332 [2023-04-02 13:54:29,903 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 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) [2023-04-02 13:54:29,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:54:29,957 INFO L93 Difference]: Finished difference Result 66 states and 87 transitions. [2023-04-02 13:54:29,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-02 13:54:29,957 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 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 27 [2023-04-02 13:54:29,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:54:29,957 INFO L225 Difference]: With dead ends: 66 [2023-04-02 13:54:29,958 INFO L226 Difference]: Without dead ends: 47 [2023-04-02 13:54:29,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=343, Invalid=989, Unknown=0, NotChecked=0, Total=1332 [2023-04-02 13:54:29,959 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 13:54:29,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 120 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 13:54:29,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-04-02 13:54:29,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-04-02 13:54:29,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 13:54:29,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2023-04-02 13:54:29,962 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 27 [2023-04-02 13:54:29,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:54:29,963 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2023-04-02 13:54:29,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 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) [2023-04-02 13:54:29,963 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2023-04-02 13:54:29,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-04-02 13:54:29,963 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:29,963 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:54:29,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 13:54:30,168 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 [2023-04-02 13:54:30,168 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:30,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:30,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1507206690, now seen corresponding path program 5 times [2023-04-02 13:54:30,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:30,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529692959] [2023-04-02 13:54:30,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:30,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:30,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:30,706 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 13:54:30,706 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:30,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529692959] [2023-04-02 13:54:30,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529692959] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:54:30,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942970942] [2023-04-02 13:54:30,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 13:54:30,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:30,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:54:30,707 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) [2023-04-02 13:54:30,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 13:54:30,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 13:54:30,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:54:30,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 13:54:30,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:54:30,883 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-04-02 13:54:30,883 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:54:30,987 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-04-02 13:54:30,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942970942] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:54:30,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1719781462] [2023-04-02 13:54:30,988 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-04-02 13:54:30,989 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:54:30,989 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:54:30,989 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:54:30,989 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:54:30,999 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:54:31,113 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 13:54:31,122 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:54:31,124 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:54:31,765 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1627#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#a~0.base_BEFORE_CALL_5| Int) (|v_main_~#b~0.base_BEFORE_CALL_5| Int)) (and (<= (+ |#StackHeapBarrier| 1) |v_main_~#b~0.base_BEFORE_CALL_5|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_5|) (<= 2 |v_main_~#b~0.base_BEFORE_CALL_5|) (<= 4 (+ |v_main_~#b~0.base_BEFORE_CALL_5| |v_main_~#a~0.base_BEFORE_CALL_5|)) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_5|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_5|)) (<= 3 (+ |v_main_~#b~0.base_BEFORE_CALL_5| |#StackHeapBarrier|)) (not (= (select (select |#memory_int| |v_main_~#b~0.base_BEFORE_CALL_5|) 0) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_5|) 0))))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 13:54:31,765 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:54:31,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:54:31,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 7, 7] total 35 [2023-04-02 13:54:31,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296337173] [2023-04-02 13:54:31,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:54:31,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-04-02 13:54:31,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:54:31,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-04-02 13:54:31,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=418, Invalid=1744, Unknown=0, NotChecked=0, Total=2162 [2023-04-02 13:54:31,768 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 35 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 35 states have internal predecessors, (48), 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) [2023-04-02 13:54:32,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:54:32,138 INFO L93 Difference]: Finished difference Result 73 states and 89 transitions. [2023-04-02 13:54:32,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-04-02 13:54:32,139 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 35 states have internal predecessors, (48), 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 39 [2023-04-02 13:54:32,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:54:32,139 INFO L225 Difference]: With dead ends: 73 [2023-04-02 13:54:32,139 INFO L226 Difference]: Without dead ends: 54 [2023-04-02 13:54:32,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1102 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1223, Invalid=3607, Unknown=0, NotChecked=0, Total=4830 [2023-04-02 13:54:32,141 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 13:54:32,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 154 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 13:54:32,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-04-02 13:54:32,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-04-02 13:54:32,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 47 states have internal predecessors, (52), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 13:54:32,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2023-04-02 13:54:32,146 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 39 [2023-04-02 13:54:32,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:54:32,146 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2023-04-02 13:54:32,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 35 states have internal predecessors, (48), 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) [2023-04-02 13:54:32,146 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2023-04-02 13:54:32,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-02 13:54:32,147 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:32,147 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:54:32,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 13:54:32,352 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 [2023-04-02 13:54:32,352 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:32,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:32,353 INFO L85 PathProgramCache]: Analyzing trace with hash 356901358, now seen corresponding path program 6 times [2023-04-02 13:54:32,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:32,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107156179] [2023-04-02 13:54:32,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:32,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:32,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:32,860 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-02 13:54:32,860 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:32,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107156179] [2023-04-02 13:54:32,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107156179] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:54:32,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695463146] [2023-04-02 13:54:32,860 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 13:54:32,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:32,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:54:32,862 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) [2023-04-02 13:54:32,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 13:54:33,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 13:54:33,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:54:33,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-02 13:54:33,009 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:54:33,039 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-02 13:54:33,039 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:54:33,576 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-02 13:54:33,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695463146] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:54:33,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [773504792] [2023-04-02 13:54:33,578 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-04-02 13:54:33,578 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:54:33,578 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:54:33,578 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:54:33,579 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:54:33,595 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:54:33,710 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 13:54:33,719 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:54:33,721 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:54:34,298 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2234#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#a~0.base_BEFORE_CALL_6| Int) (|v_main_~#b~0.base_BEFORE_CALL_6| Int)) (and (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_6|) (<= 3 (+ |v_main_~#b~0.base_BEFORE_CALL_6| |#StackHeapBarrier|)) (<= 4 (+ |v_main_~#b~0.base_BEFORE_CALL_6| |v_main_~#a~0.base_BEFORE_CALL_6|)) (not (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_6|) 0) (select (select |#memory_int| |v_main_~#b~0.base_BEFORE_CALL_6|) 0))) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_6|)) (<= 2 |v_main_~#b~0.base_BEFORE_CALL_6|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#b~0.base_BEFORE_CALL_6|) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_6|))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 13:54:34,299 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:54:34,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:54:34,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2023-04-02 13:54:34,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497716886] [2023-04-02 13:54:34,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:54:34,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-04-02 13:54:34,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:54:34,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-04-02 13:54:34,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1318, Invalid=2588, Unknown=0, NotChecked=0, Total=3906 [2023-04-02 13:54:34,303 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 51 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 51 states have internal predecessors, (60), 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) [2023-04-02 13:54:34,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:54:34,355 INFO L93 Difference]: Finished difference Result 104 states and 138 transitions. [2023-04-02 13:54:34,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-04-02 13:54:34,355 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 51 states have internal predecessors, (60), 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 46 [2023-04-02 13:54:34,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:54:34,359 INFO L225 Difference]: With dead ends: 104 [2023-04-02 13:54:34,359 INFO L226 Difference]: Without dead ends: 79 [2023-04-02 13:54:34,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1318, Invalid=2588, Unknown=0, NotChecked=0, Total=3906 [2023-04-02 13:54:34,361 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 13:54:34,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 69 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 13:54:34,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-04-02 13:54:34,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2023-04-02 13:54:34,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 72 states have (on average 1.0694444444444444) internal successors, (77), 72 states have internal predecessors, (77), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 13:54:34,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2023-04-02 13:54:34,377 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 46 [2023-04-02 13:54:34,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:54:34,377 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2023-04-02 13:54:34,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 51 states have internal predecessors, (60), 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) [2023-04-02 13:54:34,377 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2023-04-02 13:54:34,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-04-02 13:54:34,378 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:34,378 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:54:34,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-02 13:54:34,584 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 [2023-04-02 13:54:34,584 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:34,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:34,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1435630178, now seen corresponding path program 7 times [2023-04-02 13:54:34,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:34,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294125524] [2023-04-02 13:54:34,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:34,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:34,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:36,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1231 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-02 13:54:36,274 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:36,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294125524] [2023-04-02 13:54:36,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294125524] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:54:36,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222359158] [2023-04-02 13:54:36,274 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 13:54:36,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:36,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:54:36,277 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) [2023-04-02 13:54:36,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 13:54:36,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:36,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 997 conjuncts, 50 conjunts are in the unsatisfiable core [2023-04-02 13:54:36,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:54:36,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1231 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-02 13:54:36,599 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:54:38,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1231 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-02 13:54:38,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222359158] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:54:38,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [855252505] [2023-04-02 13:54:38,728 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-04-02 13:54:38,728 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:54:38,728 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:54:38,728 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:54:38,728 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:54:38,743 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:54:38,854 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 13:54:38,864 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:54:38,865 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:54:39,613 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3107#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#a~0.base_BEFORE_CALL_7| Int) (|v_main_~#b~0.base_BEFORE_CALL_7| Int)) (and (<= 2 |v_main_~#a~0.base_BEFORE_CALL_7|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_7|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_7|)) (<= 3 (+ |v_main_~#b~0.base_BEFORE_CALL_7| |#StackHeapBarrier|)) (<= 2 |v_main_~#b~0.base_BEFORE_CALL_7|) (not (= (select (select |#memory_int| |v_main_~#b~0.base_BEFORE_CALL_7|) 0) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_7|) 0))) (<= (+ |#StackHeapBarrier| 1) |v_main_~#b~0.base_BEFORE_CALL_7|) (<= 4 (+ |v_main_~#b~0.base_BEFORE_CALL_7| |v_main_~#a~0.base_BEFORE_CALL_7|)))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 13:54:39,613 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:54:39,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:54:39,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2023-04-02 13:54:39,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571587413] [2023-04-02 13:54:39,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:54:39,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-04-02 13:54:39,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:54:39,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-04-02 13:54:39,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5093, Invalid=7563, Unknown=0, NotChecked=0, Total=12656 [2023-04-02 13:54:39,618 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand has 101 states, 101 states have (on average 1.0891089108910892) internal successors, (110), 101 states have internal predecessors, (110), 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) [2023-04-02 13:54:39,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:54:39,772 INFO L93 Difference]: Finished difference Result 154 states and 213 transitions. [2023-04-02 13:54:39,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-04-02 13:54:39,773 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.0891089108910892) internal successors, (110), 101 states have internal predecessors, (110), 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 71 [2023-04-02 13:54:39,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:54:39,773 INFO L225 Difference]: With dead ends: 154 [2023-04-02 13:54:39,773 INFO L226 Difference]: Without dead ends: 129 [2023-04-02 13:54:39,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1970 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5093, Invalid=7563, Unknown=0, NotChecked=0, Total=12656 [2023-04-02 13:54:39,776 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 13:54:39,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 137 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 13:54:39,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-04-02 13:54:39,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2023-04-02 13:54:39,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 122 states have (on average 1.040983606557377) internal successors, (127), 122 states have internal predecessors, (127), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 13:54:39,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 134 transitions. [2023-04-02 13:54:39,785 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 134 transitions. Word has length 71 [2023-04-02 13:54:39,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:54:39,786 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 134 transitions. [2023-04-02 13:54:39,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.0891089108910892) internal successors, (110), 101 states have internal predecessors, (110), 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) [2023-04-02 13:54:39,786 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 134 transitions. [2023-04-02 13:54:39,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-04-02 13:54:39,787 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:39,787 INFO L195 NwaCegarLoop]: trace histogram [98, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:54:39,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-02 13:54:39,998 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 [2023-04-02 13:54:39,998 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:39,999 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:39,999 INFO L85 PathProgramCache]: Analyzing trace with hash 501890974, now seen corresponding path program 8 times [2023-04-02 13:54:39,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:39,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952043281] [2023-04-02 13:54:39,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:39,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:40,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:45,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4906 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-02 13:54:45,316 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:45,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952043281] [2023-04-02 13:54:45,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952043281] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:54:45,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093894058] [2023-04-02 13:54:45,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 13:54:45,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:45,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:54:45,318 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) [2023-04-02 13:54:45,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 13:54:46,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-04-02 13:54:46,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:54:46,359 INFO L262 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 13:54:46,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:54:46,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4906 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2023-04-02 13:54:46,799 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:54:47,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4906 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2023-04-02 13:54:47,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093894058] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:54:47,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1889062518] [2023-04-02 13:54:47,312 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-04-02 13:54:47,312 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:54:47,313 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:54:47,313 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:54:47,313 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:54:47,322 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:54:47,431 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 13:54:47,440 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:54:47,442 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:54:48,574 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4502#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#a~0.base_BEFORE_CALL_8| Int) (|v_main_~#b~0.base_BEFORE_CALL_8| Int)) (and (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_8|) (<= 3 (+ |v_main_~#b~0.base_BEFORE_CALL_8| |#StackHeapBarrier|)) (<= 4 (+ |v_main_~#b~0.base_BEFORE_CALL_8| |v_main_~#a~0.base_BEFORE_CALL_8|)) (not (= (select (select |#memory_int| |v_main_~#b~0.base_BEFORE_CALL_8|) 0) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_8|) 0))) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_8|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#b~0.base_BEFORE_CALL_8|) (<= 2 |v_main_~#b~0.base_BEFORE_CALL_8|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_8|)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 13:54:48,574 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:54:48,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:54:48,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 13, 13] total 123 [2023-04-02 13:54:48,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178322636] [2023-04-02 13:54:48,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:54:48,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2023-04-02 13:54:48,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:54:48,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2023-04-02 13:54:48,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5390, Invalid=12700, Unknown=0, NotChecked=0, Total=18090 [2023-04-02 13:54:48,579 INFO L87 Difference]: Start difference. First operand 129 states and 134 transitions. Second operand has 123 states, 123 states have (on average 1.1056910569105691) internal successors, (136), 123 states have internal predecessors, (136), 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) [2023-04-02 13:54:52,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:54:52,116 INFO L93 Difference]: Finished difference Result 167 states and 189 transitions. [2023-04-02 13:54:52,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2023-04-02 13:54:52,116 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.1056910569105691) internal successors, (136), 123 states have internal predecessors, (136), 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 121 [2023-04-02 13:54:52,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:54:52,117 INFO L225 Difference]: With dead ends: 167 [2023-04-02 13:54:52,117 INFO L226 Difference]: Without dead ends: 142 [2023-04-02 13:54:52,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 562 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9378 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=17567, Invalid=36955, Unknown=0, NotChecked=0, Total=54522 [2023-04-02 13:54:52,121 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 13:54:52,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 188 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 13:54:52,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-04-02 13:54:52,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2023-04-02 13:54:52,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 135 states have (on average 1.037037037037037) internal successors, (140), 135 states have internal predecessors, (140), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 13:54:52,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 147 transitions. [2023-04-02 13:54:52,130 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 147 transitions. Word has length 121 [2023-04-02 13:54:52,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:54:52,132 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 147 transitions. [2023-04-02 13:54:52,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.1056910569105691) internal successors, (136), 123 states have internal predecessors, (136), 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) [2023-04-02 13:54:52,132 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 147 transitions. [2023-04-02 13:54:52,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-04-02 13:54:52,133 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:54:52,133 INFO L195 NwaCegarLoop]: trace histogram [99, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:54:52,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-02 13:54:52,341 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 [2023-04-02 13:54:52,341 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:54:52,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:54:52,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1149161838, now seen corresponding path program 9 times [2023-04-02 13:54:52,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:54:52,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413877232] [2023-04-02 13:54:52,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:54:52,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:54:52,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:54:57,492 INFO L134 CoverageAnalysis]: Checked inductivity of 5203 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-04-02 13:54:57,492 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:54:57,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413877232] [2023-04-02 13:54:57,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413877232] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:54:57,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35802692] [2023-04-02 13:54:57,493 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 13:54:57,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:54:57,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:54:57,494 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) [2023-04-02 13:54:57,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-02 13:54:57,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 13:54:57,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:54:57,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 1960 conjuncts, 101 conjunts are in the unsatisfiable core [2023-04-02 13:54:57,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:54:58,140 INFO L134 CoverageAnalysis]: Checked inductivity of 5203 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-04-02 13:54:58,141 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:55:06,526 INFO L134 CoverageAnalysis]: Checked inductivity of 5203 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-04-02 13:55:06,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35802692] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:55:06,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [557120968] [2023-04-02 13:55:06,530 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-04-02 13:55:06,530 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:55:06,530 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:55:06,530 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:55:06,530 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:55:06,549 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:55:06,674 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 13:55:06,684 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:55:06,685 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:55:07,768 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6305#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#a~0.base_BEFORE_CALL_9| Int) (|v_main_~#b~0.base_BEFORE_CALL_9| Int)) (and (<= 2 |v_main_~#b~0.base_BEFORE_CALL_9|) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_9|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_9|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#b~0.base_BEFORE_CALL_9|) (not (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_9|) 0) (select (select |#memory_int| |v_main_~#b~0.base_BEFORE_CALL_9|) 0))) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_9|)) (<= 4 (+ |v_main_~#b~0.base_BEFORE_CALL_9| |v_main_~#a~0.base_BEFORE_CALL_9|)) (<= 3 (+ |v_main_~#b~0.base_BEFORE_CALL_9| |#StackHeapBarrier|)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 13:55:07,768 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:55:07,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:55:07,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102, 102] total 203 [2023-04-02 13:55:07,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671920237] [2023-04-02 13:55:07,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:55:07,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2023-04-02 13:55:07,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:55:07,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2023-04-02 13:55:07,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20546, Invalid=25464, Unknown=0, NotChecked=0, Total=46010 [2023-04-02 13:55:07,775 INFO L87 Difference]: Start difference. First operand 142 states and 147 transitions. Second operand has 203 states, 203 states have (on average 1.0443349753694582) internal successors, (212), 203 states have internal predecessors, (212), 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) [2023-04-02 13:55:08,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:55:08,118 INFO L93 Difference]: Finished difference Result 280 states and 390 transitions. [2023-04-02 13:55:08,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2023-04-02 13:55:08,118 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0443349753694582) internal successors, (212), 203 states have internal predecessors, (212), 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 134 [2023-04-02 13:55:08,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:55:08,119 INFO L225 Difference]: With dead ends: 280 [2023-04-02 13:55:08,120 INFO L226 Difference]: Without dead ends: 243 [2023-04-02 13:55:08,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4010 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=20546, Invalid=25464, Unknown=0, NotChecked=0, Total=46010 [2023-04-02 13:55:08,122 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 13:55:08,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 120 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 13:55:08,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2023-04-02 13:55:08,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2023-04-02 13:55:08,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 236 states have (on average 1.021186440677966) internal successors, (241), 236 states have internal predecessors, (241), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 13:55:08,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 248 transitions. [2023-04-02 13:55:08,135 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 248 transitions. Word has length 134 [2023-04-02 13:55:08,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:55:08,135 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 248 transitions. [2023-04-02 13:55:08,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0443349753694582) internal successors, (212), 203 states have internal predecessors, (212), 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) [2023-04-02 13:55:08,136 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 248 transitions. [2023-04-02 13:55:08,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2023-04-02 13:55:08,137 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:55:08,138 INFO L195 NwaCegarLoop]: trace histogram [200, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:55:08,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-02 13:55:08,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:55:08,349 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:55:08,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:55:08,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1418665698, now seen corresponding path program 10 times [2023-04-02 13:55:08,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:55:08,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198061898] [2023-04-02 13:55:08,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:55:08,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:55:08,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:55:28,332 INFO L134 CoverageAnalysis]: Checked inductivity of 20353 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-04-02 13:55:28,332 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:55:28,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198061898] [2023-04-02 13:55:28,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198061898] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:55:28,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595546769] [2023-04-02 13:55:28,332 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 13:55:28,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:55:28,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:55:28,333 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 13:55:28,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-02 13:55:29,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:55:29,185 INFO L262 TraceCheckSpWp]: Trace formula consists of 3677 conjuncts, 202 conjunts are in the unsatisfiable core [2023-04-02 13:55:29,191 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:55:29,458 INFO L134 CoverageAnalysis]: Checked inductivity of 20353 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-04-02 13:55:29,458 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:56:03,032 INFO L134 CoverageAnalysis]: Checked inductivity of 20353 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-04-02 13:56:03,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595546769] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:56:03,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1970991469] [2023-04-02 13:56:03,033 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-04-02 13:56:03,033 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:56:03,034 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:56:03,034 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:56:03,034 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:56:03,042 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:56:03,135 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 13:56:03,144 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:56:03,145 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:56:04,900 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9146#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#a~0.base_BEFORE_CALL_10| Int) (|v_main_~#b~0.base_BEFORE_CALL_10| Int)) (and (<= 3 (+ |v_main_~#a~0.base_BEFORE_CALL_10| |#StackHeapBarrier|)) (<= 4 (+ |v_main_~#a~0.base_BEFORE_CALL_10| |v_main_~#b~0.base_BEFORE_CALL_10|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_10|) (<= 2 |v_main_~#b~0.base_BEFORE_CALL_10|) (<= 3 (+ |v_main_~#b~0.base_BEFORE_CALL_10| |#StackHeapBarrier|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#b~0.base_BEFORE_CALL_10|) (not (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_10|) 0) (select (select |#memory_int| |v_main_~#b~0.base_BEFORE_CALL_10|) 0))) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_10|))) (= |#NULL.base| 0))' at error location [2023-04-02 13:56:04,900 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:56:04,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:56:04,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [203, 203, 203] total 405 [2023-04-02 13:56:04,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007413015] [2023-04-02 13:56:04,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:56:04,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2023-04-02 13:56:04,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:56:04,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2023-04-02 13:56:04,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81853, Invalid=91619, Unknown=0, NotChecked=0, Total=173472 [2023-04-02 13:56:04,917 INFO L87 Difference]: Start difference. First operand 243 states and 248 transitions. Second operand has 405 states, 405 states have (on average 1.0222222222222221) internal successors, (414), 405 states have internal predecessors, (414), 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) [2023-04-02 13:56:06,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 13:56:06,441 INFO L93 Difference]: Finished difference Result 482 states and 693 transitions. [2023-04-02 13:56:06,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2023-04-02 13:56:06,442 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 1.0222222222222221) internal successors, (414), 405 states have internal predecessors, (414), 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 235 [2023-04-02 13:56:06,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 13:56:06,443 INFO L225 Difference]: With dead ends: 482 [2023-04-02 13:56:06,443 INFO L226 Difference]: Without dead ends: 445 [2023-04-02 13:56:06,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 907 GetRequests, 492 SyntacticMatches, 0 SemanticMatches, 415 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8050 ImplicationChecksByTransitivity, 46.0s TimeCoverageRelationStatistics Valid=81853, Invalid=91619, Unknown=0, NotChecked=0, Total=173472 [2023-04-02 13:56:06,449 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 13:56:06,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 171 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 13:56:06,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2023-04-02 13:56:06,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 445. [2023-04-02 13:56:06,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 438 states have (on average 1.0114155251141552) internal successors, (443), 438 states have internal predecessors, (443), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 13:56:06,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 450 transitions. [2023-04-02 13:56:06,465 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 450 transitions. Word has length 235 [2023-04-02 13:56:06,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 13:56:06,465 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 450 transitions. [2023-04-02 13:56:06,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 1.0222222222222221) internal successors, (414), 405 states have internal predecessors, (414), 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) [2023-04-02 13:56:06,465 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 450 transitions. [2023-04-02 13:56:06,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2023-04-02 13:56:06,469 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 13:56:06,469 INFO L195 NwaCegarLoop]: trace histogram [402, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 13:56:06,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-02 13:56:06,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-02 13:56:06,685 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 13:56:06,685 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 13:56:06,685 INFO L85 PathProgramCache]: Analyzing trace with hash 174265118, now seen corresponding path program 11 times [2023-04-02 13:56:06,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 13:56:06,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066776676] [2023-04-02 13:56:06,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 13:56:06,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 13:56:07,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 13:57:30,816 INFO L134 CoverageAnalysis]: Checked inductivity of 81256 backedges. 0 proven. 81003 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-04-02 13:57:30,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 13:57:30,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066776676] [2023-04-02 13:57:30,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066776676] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 13:57:30,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111833302] [2023-04-02 13:57:30,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 13:57:30,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 13:57:30,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 13:57:30,819 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 13:57:30,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-02 13:58:11,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2023-04-02 13:58:11,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 13:58:11,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-02 13:58:11,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 13:58:14,478 INFO L134 CoverageAnalysis]: Checked inductivity of 81256 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 81003 trivial. 0 not checked. [2023-04-02 13:58:14,478 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 13:58:18,032 INFO L134 CoverageAnalysis]: Checked inductivity of 81256 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 81003 trivial. 0 not checked. [2023-04-02 13:58:18,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111833302] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 13:58:18,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [219602396] [2023-04-02 13:58:18,033 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-04-02 13:58:18,033 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 13:58:18,034 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 13:58:18,034 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 13:58:18,034 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 13:58:18,042 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 13:58:18,152 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-04-02 13:58:18,161 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 13:58:18,162 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 13:58:21,413 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14053#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#a~0.base_BEFORE_CALL_11| Int) (|v_main_~#b~0.base_BEFORE_CALL_11| Int)) (and (<= 2 |v_main_~#b~0.base_BEFORE_CALL_11|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#b~0.base_BEFORE_CALL_11|) (<= 3 (+ |v_main_~#b~0.base_BEFORE_CALL_11| |#StackHeapBarrier|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_11|) (<= 3 (+ |v_main_~#a~0.base_BEFORE_CALL_11| |#StackHeapBarrier|)) (<= 4 (+ |v_main_~#a~0.base_BEFORE_CALL_11| |v_main_~#b~0.base_BEFORE_CALL_11|)) (not (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_11|) 0) (select (select |#memory_int| |v_main_~#b~0.base_BEFORE_CALL_11|) 0))) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_11|))) (= |#NULL.base| 0))' at error location [2023-04-02 13:58:21,413 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 13:58:21,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 13:58:21,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [405, 25, 25] total 451 [2023-04-02 13:58:21,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182761160] [2023-04-02 13:58:21,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 13:58:21,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 451 states [2023-04-02 13:58:21,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 13:58:21,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 451 interpolants. [2023-04-02 13:58:21,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83026, Invalid=130880, Unknown=0, NotChecked=0, Total=213906 [2023-04-02 13:58:21,434 INFO L87 Difference]: Start difference. First operand 445 states and 450 transitions. Second operand has 451 states, 451 states have (on average 1.0288248337028825) internal successors, (464), 451 states have internal predecessors, (464), 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)