/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-patterns/array24_pattern.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 02:56:36,353 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 02:56:36,355 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 02:56:36,396 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 02:56:36,396 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 02:56:36,399 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 02:56:36,402 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 02:56:36,404 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 02:56:36,405 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 02:56:36,410 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 02:56:36,411 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 02:56:36,413 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 02:56:36,413 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 02:56:36,415 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 02:56:36,417 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 02:56:36,418 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 02:56:36,418 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 02:56:36,419 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 02:56:36,421 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 02:56:36,425 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 02:56:36,426 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 02:56:36,427 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 02:56:36,428 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 02:56:36,429 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 02:56:36,436 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 02:56:36,440 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 02:56:36,441 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 02:56:36,442 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 02:56:36,442 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 02:56:36,443 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 02:56:36,443 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 02:56:36,444 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 02:56:36,444 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 02:56:36,444 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 02:56:36,445 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 02:56:36,445 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 02:56:36,447 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 02:56:36,477 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 02:56:36,477 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 02:56:36,478 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 02:56:36,478 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 02:56:36,478 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 02:56:36,479 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 02:56:36,479 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 02:56:36,479 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 02:56:36,479 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 02:56:36,479 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 02:56:36,480 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 02:56:36,480 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 02:56:36,480 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 02:56:36,480 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 02:56:36,480 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 02:56:36,480 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 02:56:36,481 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 02:56:36,481 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 02:56:36,481 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 02:56:36,481 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 02:56:36,481 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 02:56:36,482 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 02:56:36,482 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 02:56:36,482 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 02:56:36,482 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 02:56:36,482 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 02:56:36,482 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 02:56:36,482 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 02:56:36,482 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 02:56:36,482 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 02:56:36,483 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 02:56:36,483 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 02:56:36,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 02:56:36,483 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 02:56:36,483 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 02:56:36,483 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 02:56:36,483 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 02:56:36,484 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 02:56:36,484 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 02:56:36,484 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 02:56:36,484 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 02:56:36,484 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 02:56:36,751 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 02:56:36,777 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 02:56:36,779 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 02:56:36,780 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 02:56:36,780 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 02:56:36,781 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array24_pattern.c [2023-04-01 02:56:37,950 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 02:56:38,129 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 02:56:38,129 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array24_pattern.c [2023-04-01 02:56:38,137 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c078add4/ada6e0d39f7344afb8c4ed811a556bee/FLAG24384fa44 [2023-04-01 02:56:38,149 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c078add4/ada6e0d39f7344afb8c4ed811a556bee [2023-04-01 02:56:38,151 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 02:56:38,152 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 02:56:38,154 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 02:56:38,154 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 02:56:38,160 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 02:56:38,160 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 02:56:38" (1/1) ... [2023-04-01 02:56:38,161 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59d5f6f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:56:38, skipping insertion in model container [2023-04-01 02:56:38,161 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 02:56:38" (1/1) ... [2023-04-01 02:56:38,167 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 02:56:38,184 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 02:56:38,296 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-patterns/array24_pattern.c[1359,1372] [2023-04-01 02:56:38,315 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 02:56:38,324 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 02:56:38,333 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-patterns/array24_pattern.c[1359,1372] [2023-04-01 02:56:38,342 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 02:56:38,355 INFO L208 MainTranslator]: Completed translation [2023-04-01 02:56:38,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:56:38 WrapperNode [2023-04-01 02:56:38,356 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 02:56:38,356 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 02:56:38,357 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 02:56:38,357 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 02:56:38,367 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:56:38" (1/1) ... [2023-04-01 02:56:38,367 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:56:38" (1/1) ... [2023-04-01 02:56:38,372 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:56:38" (1/1) ... [2023-04-01 02:56:38,373 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:56:38" (1/1) ... [2023-04-01 02:56:38,379 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:56:38" (1/1) ... [2023-04-01 02:56:38,384 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:56:38" (1/1) ... [2023-04-01 02:56:38,385 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:56:38" (1/1) ... [2023-04-01 02:56:38,387 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:56:38" (1/1) ... [2023-04-01 02:56:38,389 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 02:56:38,390 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 02:56:38,390 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 02:56:38,390 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 02:56:38,391 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:56:38" (1/1) ... [2023-04-01 02:56:38,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 02:56:38,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:56:38,418 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 02:56:38,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 02:56:38,451 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 02:56:38,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 02:56:38,452 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 02:56:38,452 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 02:56:38,452 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 02:56:38,452 INFO L138 BoogieDeclarations]: Found implementation of procedure outerBoundaryPatternCheck [2023-04-01 02:56:38,452 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 02:56:38,452 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 02:56:38,453 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 02:56:38,453 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 02:56:38,453 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 02:56:38,453 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 02:56:38,453 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 02:56:38,453 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 02:56:38,453 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2023-04-01 02:56:38,453 INFO L130 BoogieDeclarations]: Found specification of procedure outerBoundaryPatternCheck [2023-04-01 02:56:38,453 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 02:56:38,454 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 02:56:38,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 02:56:38,454 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 02:56:38,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 02:56:38,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 02:56:38,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 02:56:38,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 02:56:38,516 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 02:56:38,518 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 02:56:38,823 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 02:56:38,911 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 02:56:38,911 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-04-01 02:56:38,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 02:56:38 BoogieIcfgContainer [2023-04-01 02:56:38,914 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 02:56:38,926 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 02:56:38,926 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 02:56:38,929 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 02:56:38,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 02:56:38" (1/3) ... [2023-04-01 02:56:38,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63b35665 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 02:56:38, skipping insertion in model container [2023-04-01 02:56:38,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:56:38" (2/3) ... [2023-04-01 02:56:38,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63b35665 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 02:56:38, skipping insertion in model container [2023-04-01 02:56:38,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 02:56:38" (3/3) ... [2023-04-01 02:56:38,931 INFO L112 eAbstractionObserver]: Analyzing ICFG array24_pattern.c [2023-04-01 02:56:38,945 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 02:56:38,945 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 02:56:38,982 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 02:56:38,987 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;@437a3fb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 02:56:38,987 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 02:56:38,991 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 02:56:38,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-01 02:56:38,997 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:56:38,998 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:56:38,998 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:56:39,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:56:39,002 INFO L85 PathProgramCache]: Analyzing trace with hash -175931375, now seen corresponding path program 1 times [2023-04-01 02:56:39,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:56:39,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422100059] [2023-04-01 02:56:39,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:56:39,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:56:39,094 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:56:39,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1046059673] [2023-04-01 02:56:39,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:56:39,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:56:39,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:56:39,096 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:56:39,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 02:56:39,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:56:39,184 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-01 02:56:39,188 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:56:39,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:56:39,213 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 02:56:39,214 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:56:39,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422100059] [2023-04-01 02:56:39,214 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 02:56:39,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046059673] [2023-04-01 02:56:39,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046059673] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:56:39,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 02:56:39,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 02:56:39,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997162259] [2023-04-01 02:56:39,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:56:39,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 02:56:39,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:56:39,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 02:56:39,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 02:56:39,252 INFO L87 Difference]: Start difference. First operand has 37 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 02:56:39,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:56:39,299 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2023-04-01 02:56:39,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 02:56:39,302 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2023-04-01 02:56:39,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:56:39,308 INFO L225 Difference]: With dead ends: 51 [2023-04-01 02:56:39,308 INFO L226 Difference]: Without dead ends: 31 [2023-04-01 02:56:39,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 02:56:39,318 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:56:39,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:56:39,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-04-01 02:56:39,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-04-01 02:56:39,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 8 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 02:56:39,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2023-04-01 02:56:39,364 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 17 [2023-04-01 02:56:39,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:56:39,366 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2023-04-01 02:56:39,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 02:56:39,367 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2023-04-01 02:56:39,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 02:56:39,369 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:56:39,369 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:56:39,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 02:56:39,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-01 02:56:39,576 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:56:39,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:56:39,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1897957593, now seen corresponding path program 1 times [2023-04-01 02:56:39,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:56:39,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729560091] [2023-04-01 02:56:39,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:56:39,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:56:39,617 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:56:39,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [403107692] [2023-04-01 02:56:39,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:56:39,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:56:39,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:56:39,628 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:56:39,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 02:56:39,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:56:39,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 02:56:39,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:56:39,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 02:56:39,819 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 02:56:39,820 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:56:39,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729560091] [2023-04-01 02:56:39,820 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 02:56:39,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403107692] [2023-04-01 02:56:39,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403107692] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:56:39,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 02:56:39,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 02:56:39,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457852592] [2023-04-01 02:56:39,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:56:39,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 02:56:39,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:56:39,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 02:56:39,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 02:56:39,825 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 02:56:39,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:56:39,941 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2023-04-01 02:56:39,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 02:56:39,942 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 30 [2023-04-01 02:56:39,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:56:39,943 INFO L225 Difference]: With dead ends: 59 [2023-04-01 02:56:39,944 INFO L226 Difference]: Without dead ends: 37 [2023-04-01 02:56:39,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-01 02:56:39,947 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 34 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:56:39,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 61 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:56:39,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-04-01 02:56:39,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2023-04-01 02:56:39,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 02:56:39,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2023-04-01 02:56:39,965 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 30 [2023-04-01 02:56:39,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:56:39,966 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2023-04-01 02:56:39,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 02:56:39,966 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2023-04-01 02:56:39,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-01 02:56:39,968 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:56:39,968 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:56:39,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 02:56:40,174 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,SelfDestructingSolverStorable1 [2023-04-01 02:56:40,174 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:56:40,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:56:40,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1879250976, now seen corresponding path program 1 times [2023-04-01 02:56:40,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:56:40,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548481146] [2023-04-01 02:56:40,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:56:40,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:56:40,200 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:56:40,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [121142053] [2023-04-01 02:56:40,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:56:40,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:56:40,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:56:40,204 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:56:40,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 02:56:40,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:56:40,282 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 02:56:40,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:56:40,328 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 02:56:40,329 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 02:56:40,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:56:40,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548481146] [2023-04-01 02:56:40,329 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 02:56:40,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121142053] [2023-04-01 02:56:40,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121142053] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:56:40,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 02:56:40,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 02:56:40,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898467568] [2023-04-01 02:56:40,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:56:40,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 02:56:40,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:56:40,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 02:56:40,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 02:56:40,334 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 02:56:40,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:56:40,392 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2023-04-01 02:56:40,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 02:56:40,393 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2023-04-01 02:56:40,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:56:40,394 INFO L225 Difference]: With dead ends: 62 [2023-04-01 02:56:40,395 INFO L226 Difference]: Without dead ends: 37 [2023-04-01 02:56:40,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 02:56:40,398 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 16 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:56:40,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 66 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:56:40,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-04-01 02:56:40,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-04-01 02:56:40,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 02:56:40,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2023-04-01 02:56:40,411 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 34 [2023-04-01 02:56:40,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:56:40,414 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2023-04-01 02:56:40,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 02:56:40,414 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2023-04-01 02:56:40,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-01 02:56:40,416 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:56:40,416 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:56:40,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 02:56:40,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:56:40,622 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:56:40,623 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:56:40,623 INFO L85 PathProgramCache]: Analyzing trace with hash -22273656, now seen corresponding path program 1 times [2023-04-01 02:56:40,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:56:40,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244303722] [2023-04-01 02:56:40,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:56:40,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:56:40,645 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:56:40,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [791202263] [2023-04-01 02:56:40,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:56:40,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:56:40,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:56:40,654 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:56:40,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 02:56:40,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:56:40,727 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 02:56:40,735 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:56:40,797 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 02:56:40,798 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:56:40,888 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 02:56:40,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:56:40,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244303722] [2023-04-01 02:56:40,889 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 02:56:40,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791202263] [2023-04-01 02:56:40,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791202263] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:56:40,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2015346036] [2023-04-01 02:56:40,911 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-01 02:56:40,911 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:56:40,914 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:56:40,919 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:56:40,923 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:56:41,001 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 02:56:41,985 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 15 for LOIs [2023-04-01 02:56:41,996 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-04-01 02:56:41,997 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 02:56:42,004 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 11 for LOIs [2023-04-01 02:56:42,009 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:56:43,838 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '941#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= 1 ~ARR_SIZE~0))' at error location [2023-04-01 02:56:43,839 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:56:43,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 02:56:43,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-04-01 02:56:43,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291199598] [2023-04-01 02:56:43,839 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 02:56:43,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 02:56:43,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:56:43,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 02:56:43,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1038, Unknown=2, NotChecked=0, Total=1190 [2023-04-01 02:56:43,841 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 9 states, 7 states have (on average 4.142857142857143) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2023-04-01 02:56:43,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:56:43,929 INFO L93 Difference]: Finished difference Result 66 states and 82 transitions. [2023-04-01 02:56:43,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 02:56:43,929 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 4.142857142857143) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 36 [2023-04-01 02:56:43,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:56:43,930 INFO L225 Difference]: With dead ends: 66 [2023-04-01 02:56:43,930 INFO L226 Difference]: Without dead ends: 39 [2023-04-01 02:56:43,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=155, Invalid=1103, Unknown=2, NotChecked=0, Total=1260 [2023-04-01 02:56:43,932 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 29 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:56:43,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 91 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:56:43,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-04-01 02:56:43,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-04-01 02:56:43,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 02:56:43,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2023-04-01 02:56:43,938 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 36 [2023-04-01 02:56:43,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:56:43,938 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2023-04-01 02:56:43,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 4.142857142857143) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2023-04-01 02:56:43,939 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2023-04-01 02:56:43,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-01 02:56:43,940 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:56:43,940 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:56:43,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 02:56:44,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:56:44,146 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:56:44,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:56:44,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1170949024, now seen corresponding path program 2 times [2023-04-01 02:56:44,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:56:44,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823778218] [2023-04-01 02:56:44,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:56:44,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:56:44,159 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:56:44,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1516960296] [2023-04-01 02:56:44,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:56:44,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:56:44,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:56:44,161 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:56:44,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 02:56:44,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 02:56:44,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:56:44,220 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2023-04-01 02:56:44,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:56:44,332 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 02:56:44,332 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:56:44,598 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 02:56:44,599 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:56:44,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823778218] [2023-04-01 02:56:44,599 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 02:56:44,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516960296] [2023-04-01 02:56:44,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516960296] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:56:44,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2114318110] [2023-04-01 02:56:44,604 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-01 02:56:44,604 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:56:44,604 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:56:44,605 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:56:44,605 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:56:44,635 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 02:56:45,180 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 15 for LOIs [2023-04-01 02:56:45,185 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-04-01 02:56:45,186 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 02:56:45,190 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 11 for LOIs [2023-04-01 02:56:45,193 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:56:46,876 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1381#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= 1 ~ARR_SIZE~0))' at error location [2023-04-01 02:56:46,877 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:56:46,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 02:56:46,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2023-04-01 02:56:46,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668819015] [2023-04-01 02:56:46,877 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 02:56:46,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 02:56:46,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:56:46,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 02:56:46,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1496, Unknown=2, NotChecked=0, Total=1722 [2023-04-01 02:56:46,879 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 16 states, 11 states have (on average 3.727272727272727) internal successors, (41), 14 states have internal predecessors, (41), 4 states have call successors, (10), 3 states have call predecessors, (10), 7 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2023-04-01 02:56:47,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:56:47,032 INFO L93 Difference]: Finished difference Result 78 states and 96 transitions. [2023-04-01 02:56:47,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 02:56:47,033 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 11 states have (on average 3.727272727272727) internal successors, (41), 14 states have internal predecessors, (41), 4 states have call successors, (10), 3 states have call predecessors, (10), 7 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) Word has length 38 [2023-04-01 02:56:47,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:56:47,033 INFO L225 Difference]: With dead ends: 78 [2023-04-01 02:56:47,033 INFO L226 Difference]: Without dead ends: 53 [2023-04-01 02:56:47,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=235, Invalid=1569, Unknown=2, NotChecked=0, Total=1806 [2023-04-01 02:56:47,035 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 54 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:56:47,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 86 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:56:47,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-04-01 02:56:47,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2023-04-01 02:56:47,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 states have internal predecessors, (42), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 02:56:47,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2023-04-01 02:56:47,042 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 38 [2023-04-01 02:56:47,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:56:47,042 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2023-04-01 02:56:47,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 11 states have (on average 3.727272727272727) internal successors, (41), 14 states have internal predecessors, (41), 4 states have call successors, (10), 3 states have call predecessors, (10), 7 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2023-04-01 02:56:47,043 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2023-04-01 02:56:47,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-01 02:56:47,043 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:56:47,044 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:56:47,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 02:56:47,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:56:47,250 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:56:47,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:56:47,250 INFO L85 PathProgramCache]: Analyzing trace with hash 263687193, now seen corresponding path program 3 times [2023-04-01 02:56:47,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:56:47,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774697504] [2023-04-01 02:56:47,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:56:47,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:56:47,269 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:56:47,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1291119934] [2023-04-01 02:56:47,270 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 02:56:47,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:56:47,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:56:47,271 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:56:47,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 02:56:47,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 02:56:47,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:56:47,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 72 conjunts are in the unsatisfiable core [2023-04-01 02:56:47,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:56:47,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 02:56:47,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 02:56:47,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 02:56:47,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 02:56:47,676 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:56:47,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2023-04-01 02:56:47,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 02:56:47,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 02:56:47,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 02:56:47,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 02:56:47,720 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:56:47,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2023-04-01 02:56:48,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 02:56:48,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 02:56:48,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 02:56:48,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 02:56:48,174 INFO L321 Elim1Store]: treesize reduction 156, result has 18.3 percent of original size [2023-04-01 02:56:48,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 66 treesize of output 62 [2023-04-01 02:56:48,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 02:56:48,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 02:56:48,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 02:56:48,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 02:56:48,554 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:56:48,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 13 [2023-04-01 02:56:48,628 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 02:56:48,628 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:57:09,953 WARN L223 SmtUtils]: Spent 16.28s on a formula simplification. DAG size of input: 51 DAG size of output: 49 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 02:57:11,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 462 treesize of output 446 [2023-04-01 02:57:11,187 INFO L321 Elim1Store]: treesize reduction 27, result has 22.9 percent of original size [2023-04-01 02:57:11,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 3119680 treesize of output 2964041 [2023-04-01 02:57:27,476 WARN L223 SmtUtils]: Spent 16.29s on a formula simplification. DAG size of input: 660 DAG size of output: 886 (called from [L 809] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-04-01 02:57:32,695 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 02:57:32,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:57:32,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774697504] [2023-04-01 02:57:32,696 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 02:57:32,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291119934] [2023-04-01 02:57:32,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291119934] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:57:32,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2035361645] [2023-04-01 02:57:32,698 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-01 02:57:32,698 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:57:32,699 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:57:32,699 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:57:32,699 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:57:32,718 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 02:57:33,133 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 15 for LOIs [2023-04-01 02:57:33,137 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-04-01 02:57:33,137 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 02:57:33,141 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 11 for LOIs [2023-04-01 02:57:33,143 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:57:35,748 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1937#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= 1 ~ARR_SIZE~0))' at error location [2023-04-01 02:57:35,748 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:57:35,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 02:57:35,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2023-04-01 02:57:35,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594435176] [2023-04-01 02:57:35,749 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 02:57:35,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-04-01 02:57:35,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:57:35,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-04-01 02:57:35,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=466, Invalid=4361, Unknown=3, NotChecked=0, Total=4830 [2023-04-01 02:57:35,753 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 44 states, 42 states have (on average 1.5) internal successors, (63), 42 states have internal predecessors, (63), 7 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (8), 3 states have call predecessors, (8), 5 states have call successors, (8)