/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 IntervalDomain -i ../sv-benchmarks/c/array-patterns/array24_pattern.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 20:55:09,177 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 20:55:09,179 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 20:55:09,211 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 20:55:09,212 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 20:55:09,213 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 20:55:09,214 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 20:55:09,216 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 20:55:09,217 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 20:55:09,218 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 20:55:09,218 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 20:55:09,219 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 20:55:09,219 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 20:55:09,220 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 20:55:09,221 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 20:55:09,222 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 20:55:09,222 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 20:55:09,223 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 20:55:09,224 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 20:55:09,226 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 20:55:09,227 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 20:55:09,227 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 20:55:09,228 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 20:55:09,229 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 20:55:09,232 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 20:55:09,232 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 20:55:09,232 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 20:55:09,233 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 20:55:09,233 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 20:55:09,234 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 20:55:09,234 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 20:55:09,235 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 20:55:09,236 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 20:55:09,236 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 20:55:09,237 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 20:55:09,237 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 20:55:09,238 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 20:55:09,238 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 20:55:09,238 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 20:55:09,241 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 20:55:09,242 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 20:55:09,243 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 [2023-03-31 20:55:09,273 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 20:55:09,273 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 20:55:09,273 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 20:55:09,274 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 20:55:09,274 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 20:55:09,274 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 20:55:09,274 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 20:55:09,275 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 20:55:09,275 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 20:55:09,275 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 20:55:09,275 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 20:55:09,275 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 20:55:09,275 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 20:55:09,275 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 20:55:09,275 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 20:55:09,276 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 20:55:09,276 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 20:55:09,276 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 20:55:09,276 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 20:55:09,276 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 20:55:09,276 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 20:55:09,277 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 20:55:09,277 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 20:55:09,277 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 20:55:09,277 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 20:55:09,277 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 20:55:09,277 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 20:55:09,277 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 20:55:09,277 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 20:55:09,278 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 20:55:09,278 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 20:55:09,278 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 20:55:09,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 20:55:09,278 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 20:55:09,278 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 20:55:09,278 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 20:55:09,278 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 20:55:09,279 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 20:55:09,279 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 20:55:09,279 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 20:55:09,279 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 20:55:09,279 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 20:55:09,463 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 20:55:09,481 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 20:55:09,483 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 20:55:09,484 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 20:55:09,488 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 20:55:09,490 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array24_pattern.c [2023-03-31 20:55:10,638 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 20:55:10,817 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 20:55:10,817 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array24_pattern.c [2023-03-31 20:55:10,822 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89ae6f8bd/fc14bb36186d4b77a74a6b302762565b/FLAGa194d9f12 [2023-03-31 20:55:10,834 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89ae6f8bd/fc14bb36186d4b77a74a6b302762565b [2023-03-31 20:55:10,836 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 20:55:10,837 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 20:55:10,838 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 20:55:10,838 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 20:55:10,840 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 20:55:10,841 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 08:55:10" (1/1) ... [2023-03-31 20:55:10,842 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a6f4b2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:55:10, skipping insertion in model container [2023-03-31 20:55:10,842 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 08:55:10" (1/1) ... [2023-03-31 20:55:10,847 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 20:55:10,861 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 20:55:10,965 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] [2023-03-31 20:55:10,993 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 20:55:11,000 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 20:55:11,010 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] [2023-03-31 20:55:11,018 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 20:55:11,028 INFO L208 MainTranslator]: Completed translation [2023-03-31 20:55:11,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:55:11 WrapperNode [2023-03-31 20:55:11,028 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 20:55:11,029 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 20:55:11,029 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 20:55:11,029 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 20:55:11,036 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:55:11" (1/1) ... [2023-03-31 20:55:11,036 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:55:11" (1/1) ... [2023-03-31 20:55:11,041 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:55:11" (1/1) ... [2023-03-31 20:55:11,041 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:55:11" (1/1) ... [2023-03-31 20:55:11,047 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:55:11" (1/1) ... [2023-03-31 20:55:11,050 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:55:11" (1/1) ... [2023-03-31 20:55:11,051 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:55:11" (1/1) ... [2023-03-31 20:55:11,052 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:55:11" (1/1) ... [2023-03-31 20:55:11,054 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 20:55:11,055 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 20:55:11,055 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 20:55:11,055 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 20:55:11,056 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:55:11" (1/1) ... [2023-03-31 20:55:11,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 20:55:11,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:55:11,097 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) [2023-03-31 20:55:11,098 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 [2023-03-31 20:55:11,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 20:55:11,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 20:55:11,133 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 20:55:11,133 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-31 20:55:11,133 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 20:55:11,133 INFO L138 BoogieDeclarations]: Found implementation of procedure outerBoundaryPatternCheck [2023-03-31 20:55:11,133 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 20:55:11,134 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 20:55:11,134 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 20:55:11,134 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 20:55:11,134 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 20:55:11,134 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-31 20:55:11,134 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 20:55:11,134 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 20:55:11,134 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2023-03-31 20:55:11,134 INFO L130 BoogieDeclarations]: Found specification of procedure outerBoundaryPatternCheck [2023-03-31 20:55:11,135 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 20:55:11,135 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-31 20:55:11,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 20:55:11,135 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 20:55:11,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 20:55:11,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 20:55:11,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 20:55:11,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 20:55:11,197 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 20:55:11,199 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 20:55:11,473 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 20:55:11,519 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 20:55:11,520 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-03-31 20:55:11,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 08:55:11 BoogieIcfgContainer [2023-03-31 20:55:11,522 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 20:55:11,524 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 20:55:11,524 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 20:55:11,527 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 20:55:11,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 08:55:10" (1/3) ... [2023-03-31 20:55:11,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eac8537 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 08:55:11, skipping insertion in model container [2023-03-31 20:55:11,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:55:11" (2/3) ... [2023-03-31 20:55:11,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eac8537 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 08:55:11, skipping insertion in model container [2023-03-31 20:55:11,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 08:55:11" (3/3) ... [2023-03-31 20:55:11,529 INFO L112 eAbstractionObserver]: Analyzing ICFG array24_pattern.c [2023-03-31 20:55:11,565 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 20:55:11,565 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 20:55:11,609 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 20:55:11,614 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;@5d57865c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 20:55:11,615 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 20:55:11,618 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) [2023-03-31 20:55:11,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-03-31 20:55:11,626 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:55:11,627 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:55:11,628 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:55:11,632 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:55:11,632 INFO L85 PathProgramCache]: Analyzing trace with hash -175931375, now seen corresponding path program 1 times [2023-03-31 20:55:11,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:55:11,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605218910] [2023-03-31 20:55:11,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:55:11,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:55:11,744 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:55:11,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [825102170] [2023-03-31 20:55:11,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:55:11,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:55:11,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:55:11,748 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) [2023-03-31 20:55:11,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 20:55:11,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:55:11,811 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 1 conjunts are in the unsatisfiable core [2023-03-31 20:55:11,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:55:11,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:55:11,832 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 20:55:11,833 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:55:11,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605218910] [2023-03-31 20:55:11,833 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:55:11,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825102170] [2023-03-31 20:55:11,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825102170] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 20:55:11,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 20:55:11,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-03-31 20:55:11,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694820185] [2023-03-31 20:55:11,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 20:55:11,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-03-31 20:55:11,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:55:11,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-03-31 20:55:11,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 20:55:11,864 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) [2023-03-31 20:55:11,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:55:11,896 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2023-03-31 20:55:11,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-03-31 20:55:11,904 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 [2023-03-31 20:55:11,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:55:11,909 INFO L225 Difference]: With dead ends: 51 [2023-03-31 20:55:11,909 INFO L226 Difference]: Without dead ends: 31 [2023-03-31 20:55:11,912 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 [2023-03-31 20:55:11,918 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 [2023-03-31 20:55:11,920 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] [2023-03-31 20:55:11,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-03-31 20:55:11,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-03-31 20:55:11,964 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) [2023-03-31 20:55:11,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2023-03-31 20:55:11,967 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 17 [2023-03-31 20:55:11,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:55:11,969 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2023-03-31 20:55:11,969 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) [2023-03-31 20:55:11,970 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2023-03-31 20:55:11,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-03-31 20:55:11,971 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:55:11,971 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] [2023-03-31 20:55:11,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 20:55:12,177 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 [2023-03-31 20:55:12,178 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:55:12,178 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:55:12,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1897957593, now seen corresponding path program 1 times [2023-03-31 20:55:12,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:55:12,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780590611] [2023-03-31 20:55:12,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:55:12,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:55:12,206 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:55:12,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [520935150] [2023-03-31 20:55:12,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:55:12,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:55:12,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:55:12,208 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) [2023-03-31 20:55:12,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 20:55:12,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:55:12,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-31 20:55:12,345 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:55:12,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 20:55:12,457 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 20:55:12,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:55:12,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780590611] [2023-03-31 20:55:12,458 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:55:12,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520935150] [2023-03-31 20:55:12,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520935150] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 20:55:12,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 20:55:12,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 20:55:12,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015970763] [2023-03-31 20:55:12,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 20:55:12,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 20:55:12,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:55:12,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 20:55:12,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 20:55:12,461 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) [2023-03-31 20:55:12,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:55:12,552 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2023-03-31 20:55:12,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 20:55:12,552 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 [2023-03-31 20:55:12,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:55:12,554 INFO L225 Difference]: With dead ends: 59 [2023-03-31 20:55:12,554 INFO L226 Difference]: Without dead ends: 37 [2023-03-31 20:55:12,556 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 [2023-03-31 20:55:12,558 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 [2023-03-31 20:55:12,559 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] [2023-03-31 20:55:12,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-03-31 20:55:12,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2023-03-31 20:55:12,566 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) [2023-03-31 20:55:12,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2023-03-31 20:55:12,567 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 30 [2023-03-31 20:55:12,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:55:12,568 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2023-03-31 20:55:12,568 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) [2023-03-31 20:55:12,568 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2023-03-31 20:55:12,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-03-31 20:55:12,569 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:55:12,569 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] [2023-03-31 20:55:12,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-03-31 20:55:12,769 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 [2023-03-31 20:55:12,770 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:55:12,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:55:12,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1879250976, now seen corresponding path program 1 times [2023-03-31 20:55:12,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:55:12,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166788226] [2023-03-31 20:55:12,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:55:12,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:55:12,801 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:55:12,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2014942779] [2023-03-31 20:55:12,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:55:12,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:55:12,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:55:12,803 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) [2023-03-31 20:55:12,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 20:55:12,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:55:12,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 20:55:12,868 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:55:12,891 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-31 20:55:12,891 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 20:55:12,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:55:12,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166788226] [2023-03-31 20:55:12,892 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:55:12,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014942779] [2023-03-31 20:55:12,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014942779] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 20:55:12,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 20:55:12,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 20:55:12,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866355268] [2023-03-31 20:55:12,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 20:55:12,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 20:55:12,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:55:12,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 20:55:12,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 20:55:12,894 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) [2023-03-31 20:55:12,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:55:12,930 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2023-03-31 20:55:12,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 20:55:12,931 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 [2023-03-31 20:55:12,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:55:12,931 INFO L225 Difference]: With dead ends: 62 [2023-03-31 20:55:12,932 INFO L226 Difference]: Without dead ends: 37 [2023-03-31 20:55:12,932 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 [2023-03-31 20:55:12,933 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 [2023-03-31 20:55:12,933 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] [2023-03-31 20:55:12,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-03-31 20:55:12,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-03-31 20:55:12,939 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) [2023-03-31 20:55:12,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2023-03-31 20:55:12,940 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 34 [2023-03-31 20:55:12,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:55:12,941 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2023-03-31 20:55:12,941 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) [2023-03-31 20:55:12,941 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2023-03-31 20:55:12,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-03-31 20:55:12,942 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:55:12,942 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] [2023-03-31 20:55:12,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 20:55:13,145 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 [2023-03-31 20:55:13,145 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:55:13,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:55:13,146 INFO L85 PathProgramCache]: Analyzing trace with hash -22273656, now seen corresponding path program 1 times [2023-03-31 20:55:13,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:55:13,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268143609] [2023-03-31 20:55:13,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:55:13,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:55:13,165 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:55:13,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1443586535] [2023-03-31 20:55:13,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:55:13,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:55:13,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:55:13,172 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) [2023-03-31 20:55:13,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 20:55:13,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:55:13,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-31 20:55:13,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:55:13,318 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 20:55:13,318 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:55:13,421 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 20:55:13,421 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:55:13,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268143609] [2023-03-31 20:55:13,422 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:55:13,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443586535] [2023-03-31 20:55:13,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443586535] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:55:13,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2005491761] [2023-03-31 20:55:13,451 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-03-31 20:55:13,451 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:55:13,455 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:55:13,460 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:55:13,463 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:55:13,556 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-03-31 20:55:14,086 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 15 for LOIs [2023-03-31 20:55:14,093 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-03-31 20:55:14,094 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 20:55:14,100 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 8 for LOIs [2023-03-31 20:55:14,104 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:55:14,877 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '941#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= 0 ~ARR_SIZE~0))' at error location [2023-03-31 20:55:14,877 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:55:14,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 20:55:14,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-03-31 20:55:14,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920336480] [2023-03-31 20:55:14,878 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 20:55:14,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-03-31 20:55:14,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:55:14,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-03-31 20:55:14,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=934, Unknown=4, NotChecked=0, Total=1056 [2023-03-31 20:55:14,880 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) [2023-03-31 20:55:14,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:55:14,979 INFO L93 Difference]: Finished difference Result 66 states and 82 transitions. [2023-03-31 20:55:14,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 20:55:14,979 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 [2023-03-31 20:55:14,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:55:14,981 INFO L225 Difference]: With dead ends: 66 [2023-03-31 20:55:14,981 INFO L226 Difference]: Without dead ends: 39 [2023-03-31 20:55:14,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=123, Invalid=995, Unknown=4, NotChecked=0, Total=1122 [2023-03-31 20:55:14,988 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 [2023-03-31 20:55:14,989 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] [2023-03-31 20:55:14,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-03-31 20:55:15,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-03-31 20:55:15,000 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) [2023-03-31 20:55:15,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2023-03-31 20:55:15,001 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 36 [2023-03-31 20:55:15,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:55:15,001 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2023-03-31 20:55:15,001 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) [2023-03-31 20:55:15,002 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2023-03-31 20:55:15,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-03-31 20:55:15,002 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:55:15,002 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] [2023-03-31 20:55:15,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 20:55:15,203 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 [2023-03-31 20:55:15,203 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:55:15,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:55:15,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1170949024, now seen corresponding path program 2 times [2023-03-31 20:55:15,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:55:15,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944152663] [2023-03-31 20:55:15,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:55:15,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:55:15,235 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:55:15,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1216346523] [2023-03-31 20:55:15,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 20:55:15,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:55:15,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:55:15,239 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) [2023-03-31 20:55:15,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 20:55:15,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-03-31 20:55:15,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:55:15,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2023-03-31 20:55:15,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:55:15,410 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-03-31 20:55:15,410 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:55:15,644 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-03-31 20:55:15,644 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:55:15,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944152663] [2023-03-31 20:55:15,645 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:55:15,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216346523] [2023-03-31 20:55:15,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216346523] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:55:15,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1942394648] [2023-03-31 20:55:15,651 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-03-31 20:55:15,651 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:55:15,651 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:55:15,651 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:55:15,651 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:55:15,691 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-03-31 20:55:15,919 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 15 for LOIs [2023-03-31 20:55:15,924 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-03-31 20:55:15,925 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 20:55:15,930 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 8 for LOIs [2023-03-31 20:55:15,933 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:55:16,670 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1379#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= 0 ~ARR_SIZE~0))' at error location [2023-03-31 20:55:16,670 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:55:16,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 20:55:16,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2023-03-31 20:55:16,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223810426] [2023-03-31 20:55:16,671 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 20:55:16,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-03-31 20:55:16,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:55:16,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-03-31 20:55:16,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1383, Unknown=4, NotChecked=0, Total=1560 [2023-03-31 20:55:16,673 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) [2023-03-31 20:55:16,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:55:16,814 INFO L93 Difference]: Finished difference Result 78 states and 96 transitions. [2023-03-31 20:55:16,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-31 20:55:16,815 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 [2023-03-31 20:55:16,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:55:16,815 INFO L225 Difference]: With dead ends: 78 [2023-03-31 20:55:16,816 INFO L226 Difference]: Without dead ends: 53 [2023-03-31 20:55:16,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=184, Invalid=1452, Unknown=4, NotChecked=0, Total=1640 [2023-03-31 20:55:16,817 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 71 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:55:16,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 90 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:55:16,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-03-31 20:55:16,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2023-03-31 20:55:16,824 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) [2023-03-31 20:55:16,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2023-03-31 20:55:16,827 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 38 [2023-03-31 20:55:16,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:55:16,827 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2023-03-31 20:55:16,827 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) [2023-03-31 20:55:16,828 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2023-03-31 20:55:16,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-03-31 20:55:16,831 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:55:16,831 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] [2023-03-31 20:55:16,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-31 20:55:17,037 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 [2023-03-31 20:55:17,037 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:55:17,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:55:17,038 INFO L85 PathProgramCache]: Analyzing trace with hash 263687193, now seen corresponding path program 3 times [2023-03-31 20:55:17,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:55:17,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303715539] [2023-03-31 20:55:17,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:55:17,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:55:17,052 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:55:17,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [54194067] [2023-03-31 20:55:17,052 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 20:55:17,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:55:17,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:55:17,054 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) [2023-03-31 20:55:17,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-31 20:55:17,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 20:55:17,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:55:17,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 72 conjunts are in the unsatisfiable core [2023-03-31 20:55:17,346 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:55:17,396 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 [2023-03-31 20:55:17,425 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 [2023-03-31 20:55:17,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 20:55:17,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 20:55:17,519 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 20:55:17,519 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 [2023-03-31 20:55:17,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 20:55:17,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 20:55:17,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 20:55:17,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 20:55:17,564 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 20:55:17,565 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 [2023-03-31 20:55:18,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 20:55:18,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 20:55:18,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 20:55:18,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 20:55:18,081 INFO L321 Elim1Store]: treesize reduction 156, result has 18.3 percent of original size [2023-03-31 20:55:18,081 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 [2023-03-31 20:55:18,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 20:55:18,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 20:55:18,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 20:55:18,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 20:55:18,487 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 20:55:18,488 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 [2023-03-31 20:55:18,563 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 20:55:18,563 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:55:37,242 WARN L223 SmtUtils]: Spent 16.39s 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) [2023-03-31 20:55:38,629 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 [2023-03-31 20:55:38,733 INFO L321 Elim1Store]: treesize reduction 27, result has 22.9 percent of original size [2023-03-31 20:55:38,734 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 [2023-03-31 20:55:54,972 WARN L223 SmtUtils]: Spent 16.23s 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) [2023-03-31 20:56:00,358 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 20:56:00,358 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:56:00,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303715539] [2023-03-31 20:56:00,359 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:56:00,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54194067] [2023-03-31 20:56:00,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54194067] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:56:00,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1030812125] [2023-03-31 20:56:00,361 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-03-31 20:56:00,361 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:56:00,361 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:56:00,362 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:56:00,362 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:56:00,378 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-03-31 20:56:00,556 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 15 for LOIs [2023-03-31 20:56:00,560 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-03-31 20:56:00,561 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 20:56:00,564 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 8 for LOIs [2023-03-31 20:56:00,566 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:56:01,951 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1933#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= 0 ~ARR_SIZE~0))' at error location [2023-03-31 20:56:01,951 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:56:01,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 20:56:01,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2023-03-31 20:56:01,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877512725] [2023-03-31 20:56:01,952 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 20:56:01,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-03-31 20:56:01,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:56:01,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-03-31 20:56:01,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=4143, Unknown=4, NotChecked=0, Total=4556 [2023-03-31 20:56:01,955 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) [2023-03-31 20:56:16,677 WARN L223 SmtUtils]: Spent 8.21s on a formula simplification that was a NOOP. DAG size: 83 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-03-31 20:56:19,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1]