/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/array-fpi/condg.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 09:03:58,230 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 09:03:58,231 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 09:03:58,258 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 09:03:58,259 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 09:03:58,262 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 09:03:58,264 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 09:03:58,266 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 09:03:58,267 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 09:03:58,270 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 09:03:58,271 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 09:03:58,272 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 09:03:58,272 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 09:03:58,274 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 09:03:58,275 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 09:03:58,276 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 09:03:58,276 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 09:03:58,277 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 09:03:58,278 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 09:03:58,281 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 09:03:58,282 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 09:03:58,283 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 09:03:58,283 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 09:03:58,284 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 09:03:58,288 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 09:03:58,289 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 09:03:58,289 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 09:03:58,290 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 09:03:58,290 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 09:03:58,290 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 09:03:58,291 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 09:03:58,291 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 09:03:58,292 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 09:03:58,293 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 09:03:58,293 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 09:03:58,293 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 09:03:58,294 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 09:03:58,294 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 09:03:58,294 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 09:03:58,294 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 09:03:58,295 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 09:03:58,296 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 09:03:58,316 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 09:03:58,316 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 09:03:58,316 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 09:03:58,316 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 09:03:58,319 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 09:03:58,319 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 09:03:58,319 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 09:03:58,319 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 09:03:58,320 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 09:03:58,320 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 09:03:58,320 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 09:03:58,320 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 09:03:58,320 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 09:03:58,320 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 09:03:58,320 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 09:03:58,321 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 09:03:58,321 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 09:03:58,321 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 09:03:58,321 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 09:03:58,321 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 09:03:58,321 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 09:03:58,321 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 09:03:58,321 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 09:03:58,322 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 09:03:58,322 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 09:03:58,322 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 09:03:58,322 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 09:03:58,322 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 09:03:58,322 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 09:03:58,322 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 09:03:58,322 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 09:03:58,322 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 09:03:58,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:03:58,323 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 09:03:58,323 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 09:03:58,323 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 09:03:58,323 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 09:03:58,323 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 09:03:58,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 09:03:58,323 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 09:03:58,323 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 09:03:58,323 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 09:03:58,487 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 09:03:58,501 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 09:03:58,503 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 09:03:58,503 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 09:03:58,504 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 09:03:58,505 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/condg.c [2023-04-01 09:03:59,558 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 09:03:59,715 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 09:03:59,716 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/condg.c [2023-04-01 09:03:59,721 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1404a4b4/0a58f4b735004237a13bd0bcaa277149/FLAG10bfbd146 [2023-04-01 09:03:59,730 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1404a4b4/0a58f4b735004237a13bd0bcaa277149 [2023-04-01 09:03:59,731 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 09:03:59,732 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 09:03:59,733 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 09:03:59,733 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 09:03:59,735 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 09:03:59,735 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:03:59" (1/1) ... [2023-04-01 09:03:59,736 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60b2c27e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:03:59, skipping insertion in model container [2023-04-01 09:03:59,736 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:03:59" (1/1) ... [2023-04-01 09:03:59,752 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 09:03:59,760 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 09:03:59,839 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-fpi/condg.c[588,601] [2023-04-01 09:03:59,850 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:03:59,855 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 09:03:59,863 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-fpi/condg.c[588,601] [2023-04-01 09:03:59,867 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:03:59,875 INFO L208 MainTranslator]: Completed translation [2023-04-01 09:03:59,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:03:59 WrapperNode [2023-04-01 09:03:59,875 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 09:03:59,876 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 09:03:59,876 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 09:03:59,876 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 09:03:59,885 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:03:59" (1/1) ... [2023-04-01 09:03:59,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:03:59" (1/1) ... [2023-04-01 09:03:59,889 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:03:59" (1/1) ... [2023-04-01 09:03:59,889 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:03:59" (1/1) ... [2023-04-01 09:03:59,893 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:03:59" (1/1) ... [2023-04-01 09:03:59,895 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:03:59" (1/1) ... [2023-04-01 09:03:59,896 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:03:59" (1/1) ... [2023-04-01 09:03:59,897 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:03:59" (1/1) ... [2023-04-01 09:03:59,898 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 09:03:59,901 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 09:03:59,902 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 09:03:59,902 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 09:03:59,902 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:03:59" (1/1) ... [2023-04-01 09:03:59,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:03:59,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:03:59,929 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 09:03:59,940 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 09:03:59,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 09:03:59,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 09:03:59,959 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 09:03:59,959 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 09:03:59,959 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 09:03:59,959 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 09:03:59,959 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 09:03:59,959 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 09:03:59,959 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 09:03:59,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 09:03:59,959 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 09:03:59,959 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 09:03:59,959 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 09:03:59,959 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 09:03:59,960 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 09:03:59,960 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 09:03:59,960 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 09:03:59,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 09:03:59,960 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 09:03:59,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 09:03:59,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 09:03:59,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 09:03:59,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 09:04:00,006 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 09:04:00,008 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 09:04:00,173 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 09:04:00,219 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 09:04:00,219 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-04-01 09:04:00,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:04:00 BoogieIcfgContainer [2023-04-01 09:04:00,221 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 09:04:00,222 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 09:04:00,222 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 09:04:00,224 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 09:04:00,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 09:03:59" (1/3) ... [2023-04-01 09:04:00,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31d1d038 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:04:00, skipping insertion in model container [2023-04-01 09:04:00,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:03:59" (2/3) ... [2023-04-01 09:04:00,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31d1d038 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:04:00, skipping insertion in model container [2023-04-01 09:04:00,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:04:00" (3/3) ... [2023-04-01 09:04:00,226 INFO L112 eAbstractionObserver]: Analyzing ICFG condg.c [2023-04-01 09:04:00,236 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 09:04:00,236 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 09:04:00,263 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 09:04:00,267 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;@5e3c97ff, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 09:04:00,267 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 09:04:00,269 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 09:04:00,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 09:04:00,274 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:04:00,274 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:04:00,274 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:04:00,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:04:00,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1916942227, now seen corresponding path program 1 times [2023-04-01 09:04:00,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:04:00,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501978149] [2023-04-01 09:04:00,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:04:00,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:04:00,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:04:00,505 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 09:04:00,505 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:04:00,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501978149] [2023-04-01 09:04:00,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501978149] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:04:00,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:04:00,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 09:04:00,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025133503] [2023-04-01 09:04:00,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:04:00,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 09:04:00,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:04:00,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 09:04:00,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 09:04:00,541 INFO L87 Difference]: Start difference. First operand has 26 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:04:00,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:04:00,605 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2023-04-01 09:04:00,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 09:04:00,607 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-04-01 09:04:00,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:04:00,612 INFO L225 Difference]: With dead ends: 51 [2023-04-01 09:04:00,612 INFO L226 Difference]: Without dead ends: 28 [2023-04-01 09:04:00,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 09:04:00,617 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 23 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 09:04:00,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 39 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 09:04:00,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-01 09:04:00,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2023-04-01 09:04:00,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 09:04:00,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2023-04-01 09:04:00,644 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 18 [2023-04-01 09:04:00,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:04:00,645 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2023-04-01 09:04:00,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:04:00,645 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2023-04-01 09:04:00,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 09:04:00,646 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:04:00,646 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:04:00,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 09:04:00,646 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:04:00,647 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:04:00,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1492322813, now seen corresponding path program 1 times [2023-04-01 09:04:00,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:04:00,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118866136] [2023-04-01 09:04:00,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:04:00,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:04:00,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:04:01,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:04:01,600 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:04:01,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118866136] [2023-04-01 09:04:01,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118866136] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:04:01,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879547894] [2023-04-01 09:04:01,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:04:01,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:04:01,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:04:01,619 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 09:04:01,657 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 09:04:01,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:04:01,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 48 conjunts are in the unsatisfiable core [2023-04-01 09:04:01,691 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:04:01,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-04-01 09:04:01,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 09:04:01,849 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 09:04:01,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2023-04-01 09:04:01,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2023-04-01 09:04:02,074 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:04:02,074 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:04:02,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-04-01 09:04:02,303 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:04:02,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:04:02,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879547894] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:04:02,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1969290714] [2023-04-01 09:04:02,439 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 09:04:02,439 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:04:02,453 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:04:02,466 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:04:02,479 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:04:02,632 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 86 for LOIs [2023-04-01 09:04:04,400 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 111 for LOIs [2023-04-01 09:04:04,438 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 91 for LOIs [2023-04-01 09:04:04,446 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:04:04,450 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:04:06,364 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '299#(and (exists ((|v_old(#length)_BEFORE_CALL_3| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_3| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_3| (Array Int Int)) (|v_main_~#sum~0.base_BEFORE_CALL_1| Int)) (and (not (= (select |v_old(#memory_int)_BEFORE_CALL_3| 2) |v_old(#length)_BEFORE_CALL_3|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 7) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 6) 99) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 1) 0) 48) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 1) 1) 0) (= (select |v_old(#valid)_BEFORE_CALL_3| 0) 0) (not (= |v_old(#valid)_BEFORE_CALL_3| |v_old(#length)_BEFORE_CALL_3|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 4) 103) (= (select |v_old(#valid)_BEFORE_CALL_3| |v_main_~#sum~0.base_BEFORE_CALL_1|) 0) (= 2 (select |v_old(#length)_BEFORE_CALL_3| 1)) (= (select |v_old(#length)_BEFORE_CALL_3| 3) 12) (not (= 2 |v_main_~#sum~0.base_BEFORE_CALL_1|)) (not (= |v_old(#length)_BEFORE_CALL_3| (select |v_old(#memory_int)_BEFORE_CALL_3| 1))) (not (= (select |v_old(#memory_int)_BEFORE_CALL_3| 2) |v_old(#valid)_BEFORE_CALL_3|)) (= (select |v_old(#length)_BEFORE_CALL_3| 2) 8) (= 111 (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 1)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 0) 99) (not (= 3 |v_main_~#sum~0.base_BEFORE_CALL_1|)) (not (= |v_old(#valid)_BEFORE_CALL_3| (select |v_old(#memory_int)_BEFORE_CALL_3| 1))) (= (select |v_old(#valid)_BEFORE_CALL_3| 2) 1) (= (select |v_old(#valid)_BEFORE_CALL_3| 1) 1) (not (= |v_main_~#sum~0.base_BEFORE_CALL_1| |#StackHeapBarrier|)) (not (= |v_main_~#sum~0.base_BEFORE_CALL_1| 1)) (not (= |v_main_~#sum~0.base_BEFORE_CALL_1| 0)) (= (select |v_old(#valid)_BEFORE_CALL_3| 3) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 3) 100) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 5) 46) (= 110 (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 2)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_3| 2) (select |v_old(#memory_int)_BEFORE_CALL_3| 1))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (< 0 ~N~0) (exists ((v_main_~a~0.base_BEFORE_CALL_1 Int)) (and (not (= v_main_~a~0.base_BEFORE_CALL_1 0)) (not (= (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_1) 0) 0)) (not (= v_main_~a~0.base_BEFORE_CALL_1 |#StackHeapBarrier|)))) (= |#NULL.base| 0))' at error location [2023-04-01 09:04:06,365 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:04:06,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 09:04:06,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 30 [2023-04-01 09:04:06,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860565872] [2023-04-01 09:04:06,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 09:04:06,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-04-01 09:04:06,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:04:06,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-04-01 09:04:06,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1786, Unknown=1, NotChecked=0, Total=1980 [2023-04-01 09:04:06,369 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 30 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 27 states have internal predecessors, (34), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 09:04:06,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:04:06,876 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2023-04-01 09:04:06,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-01 09:04:06,876 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 27 states have internal predecessors, (34), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 21 [2023-04-01 09:04:06,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:04:06,878 INFO L225 Difference]: With dead ends: 44 [2023-04-01 09:04:06,878 INFO L226 Difference]: Without dead ends: 42 [2023-04-01 09:04:06,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=297, Invalid=2564, Unknown=1, NotChecked=0, Total=2862 [2023-04-01 09:04:06,907 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 50 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 09:04:06,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 101 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 09:04:06,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-04-01 09:04:06,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2023-04-01 09:04:06,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 28 states have internal predecessors, (35), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 09:04:06,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2023-04-01 09:04:06,924 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 21 [2023-04-01 09:04:06,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:04:06,925 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2023-04-01 09:04:06,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 27 states have internal predecessors, (34), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 09:04:06,925 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2023-04-01 09:04:06,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 09:04:06,927 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:04:06,928 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:04:06,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 09:04:07,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:04:07,137 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:04:07,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:04:07,138 INFO L85 PathProgramCache]: Analyzing trace with hash 685365678, now seen corresponding path program 2 times [2023-04-01 09:04:07,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:04:07,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851470246] [2023-04-01 09:04:07,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:04:07,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:04:07,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:04:07,259 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 09:04:07,259 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:04:07,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851470246] [2023-04-01 09:04:07,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851470246] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:04:07,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997160707] [2023-04-01 09:04:07,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 09:04:07,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:04:07,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:04:07,261 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 09:04:07,263 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 09:04:07,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 09:04:07,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:04:07,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 09:04:07,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:04:07,334 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 09:04:07,334 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:04:07,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 09:04:07,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997160707] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:04:07,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [40114656] [2023-04-01 09:04:07,361 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 09:04:07,362 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:04:07,362 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:04:07,362 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:04:07,362 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:04:07,410 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 86 for LOIs [2023-04-01 09:04:08,716 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 111 for LOIs [2023-04-01 09:04:08,755 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 91 for LOIs [2023-04-01 09:04:08,764 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:04:08,769 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:04:10,242 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '604#(and (exists ((|v_old(#memory_int)_BEFORE_CALL_7| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_7| (Array Int Int)) (|v_main_~#sum~0.base_BEFORE_CALL_2| Int) (|v_old(#length)_BEFORE_CALL_7| (Array Int Int))) (and (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 7) 0) (= (select |v_old(#valid)_BEFORE_CALL_7| 1) 1) (= (select |v_old(#valid)_BEFORE_CALL_7| 2) 1) (= (select |v_old(#valid)_BEFORE_CALL_7| 0) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 1) 1) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 1) 0) 48) (not (= |v_main_~#sum~0.base_BEFORE_CALL_2| 0)) (= (select |v_old(#valid)_BEFORE_CALL_7| 3) 1) (not (= (select |v_old(#memory_int)_BEFORE_CALL_7| 1) |v_old(#valid)_BEFORE_CALL_7|)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_7| 2) |v_old(#length)_BEFORE_CALL_7|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 3) 100) (not (= 3 |v_main_~#sum~0.base_BEFORE_CALL_2|)) (= 2 (select |v_old(#length)_BEFORE_CALL_7| 1)) (= 111 (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 1)) (= 103 (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 4)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 6) 99) (not (= |v_main_~#sum~0.base_BEFORE_CALL_2| 1)) (not (= |v_main_~#sum~0.base_BEFORE_CALL_2| |#StackHeapBarrier|)) (= 0 (select |v_old(#valid)_BEFORE_CALL_7| |v_main_~#sum~0.base_BEFORE_CALL_2|)) (= 8 (select |v_old(#length)_BEFORE_CALL_7| 2)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 0) 99) (= 46 (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 5)) (= 110 (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 2)) (= (select |v_old(#length)_BEFORE_CALL_7| 3) 12) (not (= (select |v_old(#memory_int)_BEFORE_CALL_7| 1) |v_old(#length)_BEFORE_CALL_7|)) (not (= 2 |v_main_~#sum~0.base_BEFORE_CALL_2|)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_7| 2) |v_old(#valid)_BEFORE_CALL_7|)) (not (= |v_old(#valid)_BEFORE_CALL_7| |v_old(#length)_BEFORE_CALL_7|)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_7| 1) (select |v_old(#memory_int)_BEFORE_CALL_7| 2))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (< 0 ~N~0) (exists ((v_main_~a~0.base_BEFORE_CALL_2 Int)) (and (not (= v_main_~a~0.base_BEFORE_CALL_2 0)) (not (= (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_2) 0) 0)) (not (= v_main_~a~0.base_BEFORE_CALL_2 |#StackHeapBarrier|)))) (= |#NULL.base| 0))' at error location [2023-04-01 09:04:10,242 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:04:10,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 09:04:10,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-04-01 09:04:10,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11083364] [2023-04-01 09:04:10,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 09:04:10,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 09:04:10,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:04:10,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 09:04:10,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=567, Unknown=1, NotChecked=0, Total=650 [2023-04-01 09:04:10,243 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 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 09:04:10,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:04:10,426 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2023-04-01 09:04:10,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 09:04:10,426 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 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 22 [2023-04-01 09:04:10,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:04:10,428 INFO L225 Difference]: With dead ends: 64 [2023-04-01 09:04:10,428 INFO L226 Difference]: Without dead ends: 53 [2023-04-01 09:04:10,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=110, Invalid=759, Unknown=1, NotChecked=0, Total=870 [2023-04-01 09:04:10,429 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 14 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:04:10,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 87 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:04:10,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-04-01 09:04:10,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 39. [2023-04-01 09:04:10,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 30 states have internal predecessors, (37), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 09:04:10,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2023-04-01 09:04:10,440 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 22 [2023-04-01 09:04:10,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:04:10,440 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2023-04-01 09:04:10,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 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 09:04:10,440 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2023-04-01 09:04:10,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 09:04:10,440 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:04:10,440 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] [2023-04-01 09:04:10,459 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 09:04:10,641 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,SelfDestructingSolverStorable2 [2023-04-01 09:04:10,641 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:04:10,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:04:10,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1783420387, now seen corresponding path program 3 times [2023-04-01 09:04:10,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:04:10,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582421809] [2023-04-01 09:04:10,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:04:10,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:04:10,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:04:10,747 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 09:04:10,747 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:04:10,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582421809] [2023-04-01 09:04:10,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582421809] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:04:10,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008315640] [2023-04-01 09:04:10,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 09:04:10,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:04:10,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:04:10,748 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 09:04:10,773 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 09:04:10,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 09:04:10,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:04:10,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 09:04:10,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:04:10,828 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 09:04:10,828 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:04:10,847 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 09:04:10,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008315640] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:04:10,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1652265159] [2023-04-01 09:04:10,849 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 09:04:10,850 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:04:10,850 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:04:10,850 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:04:10,850 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:04:10,901 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 86 for LOIs [2023-04-01 09:04:12,174 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 111 for LOIs [2023-04-01 09:04:12,212 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 91 for LOIs [2023-04-01 09:04:12,220 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:04:12,224 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:04:13,620 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '942#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (exists ((|v_old(#memory_int)_BEFORE_CALL_11| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_11| (Array Int Int)) (|v_main_~#sum~0.base_BEFORE_CALL_3| Int) (|v_old(#length)_BEFORE_CALL_11| (Array Int Int))) (and (= 46 (select (select |v_old(#memory_int)_BEFORE_CALL_11| 2) 5)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_11| 2) 4) 103) (not (= (select |v_old(#memory_int)_BEFORE_CALL_11| 2) |v_old(#valid)_BEFORE_CALL_11|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_11| 2) 1) 111) (not (= |v_old(#valid)_BEFORE_CALL_11| (select |v_old(#memory_int)_BEFORE_CALL_11| 1))) (not (= (select |v_old(#memory_int)_BEFORE_CALL_11| 2) (select |v_old(#memory_int)_BEFORE_CALL_11| 1))) (= 110 (select (select |v_old(#memory_int)_BEFORE_CALL_11| 2) 2)) (= 1 (select |v_old(#valid)_BEFORE_CALL_11| 2)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_11| 2) |v_old(#length)_BEFORE_CALL_11|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_11| 1) 1) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_11| 2) 6) 99) (not (= |v_old(#length)_BEFORE_CALL_11| (select |v_old(#memory_int)_BEFORE_CALL_11| 1))) (= (select |v_old(#valid)_BEFORE_CALL_11| |v_main_~#sum~0.base_BEFORE_CALL_3|) 0) (= 12 (select |v_old(#length)_BEFORE_CALL_11| 3)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_11| 2) 7) 0) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_11| 1) 0)) (not (= 2 |v_main_~#sum~0.base_BEFORE_CALL_3|)) (= (select |v_old(#valid)_BEFORE_CALL_11| 1) 1) (not (= |v_main_~#sum~0.base_BEFORE_CALL_3| 1)) (= 8 (select |v_old(#length)_BEFORE_CALL_11| 2)) (not (= |v_main_~#sum~0.base_BEFORE_CALL_3| 0)) (= (select |v_old(#valid)_BEFORE_CALL_11| 3) 1) (not (= 3 |v_main_~#sum~0.base_BEFORE_CALL_3|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_11| 2) 0) 99) (= (select |v_old(#length)_BEFORE_CALL_11| 1) 2) (not (= |v_old(#valid)_BEFORE_CALL_11| |v_old(#length)_BEFORE_CALL_11|)) (= (select |v_old(#valid)_BEFORE_CALL_11| 0) 0) (not (= |v_main_~#sum~0.base_BEFORE_CALL_3| |#StackHeapBarrier|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_11| 2) 3) 100))) (< 0 ~N~0) (exists ((v_main_~a~0.base_BEFORE_CALL_3 Int)) (and (not (= (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_3) 0) 0)) (not (= v_main_~a~0.base_BEFORE_CALL_3 |#StackHeapBarrier|)) (not (= v_main_~a~0.base_BEFORE_CALL_3 0)))) (= |#NULL.base| 0))' at error location [2023-04-01 09:04:13,621 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:04:13,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 09:04:13,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 12 [2023-04-01 09:04:13,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193676268] [2023-04-01 09:04:13,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 09:04:13,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 09:04:13,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:04:13,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 09:04:13,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=611, Unknown=1, NotChecked=0, Total=702 [2023-04-01 09:04:13,622 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 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 09:04:13,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:04:13,712 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2023-04-01 09:04:13,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 09:04:13,712 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 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 23 [2023-04-01 09:04:13,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:04:13,714 INFO L225 Difference]: With dead ends: 66 [2023-04-01 09:04:13,714 INFO L226 Difference]: Without dead ends: 34 [2023-04-01 09:04:13,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=98, Invalid=657, Unknown=1, NotChecked=0, Total=756 [2023-04-01 09:04:13,716 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 11 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:04:13,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 83 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:04:13,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-04-01 09:04:13,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2023-04-01 09:04:13,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 09:04:13,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2023-04-01 09:04:13,732 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 23 [2023-04-01 09:04:13,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:04:13,732 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2023-04-01 09:04:13,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 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 09:04:13,732 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2023-04-01 09:04:13,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 09:04:13,733 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:04:13,733 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:04:13,740 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 09:04:13,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:04:13,943 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:04:13,943 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:04:13,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1762641069, now seen corresponding path program 4 times [2023-04-01 09:04:13,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:04:13,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998446119] [2023-04-01 09:04:13,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:04:13,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:04:13,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:04:14,864 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:04:14,864 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:04:14,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998446119] [2023-04-01 09:04:14,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998446119] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:04:14,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532152756] [2023-04-01 09:04:14,864 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 09:04:14,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:04:14,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:04:14,879 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 09:04:14,880 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 09:04:14,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:04:14,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 62 conjunts are in the unsatisfiable core [2023-04-01 09:04:14,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:04:14,965 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 09:04:14,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-04-01 09:04:15,004 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 09:04:15,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-04-01 09:04:15,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-04-01 09:04:15,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-04-01 09:04:15,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-04-01 09:04:15,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 09:04:15,275 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-04-01 09:04:15,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 44 [2023-04-01 09:04:15,369 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:04:15,369 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:04:15,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-04-01 09:04:16,050 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:04:16,053 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:04:16,055 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-04-01 09:04:16,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 1 [2023-04-01 09:04:16,069 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:04:16,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532152756] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:04:16,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [770757900] [2023-04-01 09:04:16,071 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 09:04:16,071 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:04:16,071 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:04:16,071 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:04:16,071 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:04:16,113 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 86 for LOIs [2023-04-01 09:04:17,218 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 111 for LOIs [2023-04-01 09:04:17,252 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 91 for LOIs [2023-04-01 09:04:17,259 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:04:17,263 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:04:19,071 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1291#(and (exists ((|v_old(#length)_BEFORE_CALL_15| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_15| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_15| (Array Int Int)) (|v_main_~#sum~0.base_BEFORE_CALL_4| Int)) (and (not (= 3 |v_main_~#sum~0.base_BEFORE_CALL_4|)) (not (= |v_main_~#sum~0.base_BEFORE_CALL_4| |#StackHeapBarrier|)) (not (= |v_main_~#sum~0.base_BEFORE_CALL_4| 1)) (= (select |v_old(#valid)_BEFORE_CALL_15| 2) 1) (not (= 2 |v_main_~#sum~0.base_BEFORE_CALL_4|)) (not (= |v_main_~#sum~0.base_BEFORE_CALL_4| 0)) (= (select |v_old(#length)_BEFORE_CALL_15| 3) 12) (= 100 (select (select |v_old(#memory_int)_BEFORE_CALL_15| 2) 3)) (= (select |v_old(#valid)_BEFORE_CALL_15| 0) 0) (not (= |v_old(#valid)_BEFORE_CALL_15| |v_old(#length)_BEFORE_CALL_15|)) (not (= |v_old(#valid)_BEFORE_CALL_15| (select |v_old(#memory_int)_BEFORE_CALL_15| 1))) (= 110 (select (select |v_old(#memory_int)_BEFORE_CALL_15| 2) 2)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_15| 2) 1) 111) (= (select |v_old(#length)_BEFORE_CALL_15| 2) 8) (= (select (select |v_old(#memory_int)_BEFORE_CALL_15| 1) 0) 48) (= (select (select |v_old(#memory_int)_BEFORE_CALL_15| 2) 7) 0) (not (= (select |v_old(#memory_int)_BEFORE_CALL_15| 2) |v_old(#length)_BEFORE_CALL_15|)) (= (select |v_old(#valid)_BEFORE_CALL_15| |v_main_~#sum~0.base_BEFORE_CALL_4|) 0) (= (select |v_old(#length)_BEFORE_CALL_15| 1) 2) (= (select |v_old(#valid)_BEFORE_CALL_15| 1) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_15| 2) 6) 99) (not (= |v_old(#valid)_BEFORE_CALL_15| (select |v_old(#memory_int)_BEFORE_CALL_15| 2))) (not (= (select |v_old(#memory_int)_BEFORE_CALL_15| 2) (select |v_old(#memory_int)_BEFORE_CALL_15| 1))) (not (= |v_old(#length)_BEFORE_CALL_15| (select |v_old(#memory_int)_BEFORE_CALL_15| 1))) (= (select |v_old(#valid)_BEFORE_CALL_15| 3) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_15| 2) 5) 46) (= (select (select |v_old(#memory_int)_BEFORE_CALL_15| 1) 1) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_15| 2) 0) 99) (= 103 (select (select |v_old(#memory_int)_BEFORE_CALL_15| 2) 4)))) (exists ((v_main_~a~0.base_BEFORE_CALL_4 Int)) (and (not (= (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_4) 0) 0)) (not (= v_main_~a~0.base_BEFORE_CALL_4 0)) (not (= v_main_~a~0.base_BEFORE_CALL_4 |#StackHeapBarrier|)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (< 0 ~N~0) (= |#NULL.base| 0))' at error location [2023-04-01 09:04:19,071 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:04:19,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 09:04:19,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 15] total 38 [2023-04-01 09:04:19,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238679071] [2023-04-01 09:04:19,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 09:04:19,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-04-01 09:04:19,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:04:19,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-04-01 09:04:19,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=2566, Unknown=2, NotChecked=0, Total=2756 [2023-04-01 09:04:19,073 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 38 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 35 states have internal predecessors, (43), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 09:04:23,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:04:23,664 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2023-04-01 09:04:23,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-04-01 09:04:23,666 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 35 states have internal predecessors, (43), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2023-04-01 09:04:23,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:04:23,671 INFO L225 Difference]: With dead ends: 76 [2023-04-01 09:04:23,671 INFO L226 Difference]: Without dead ends: 74 [2023-04-01 09:04:23,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1814 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=529, Invalid=5949, Unknown=2, NotChecked=0, Total=6480 [2023-04-01 09:04:23,673 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 59 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-01 09:04:23,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 182 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-01 09:04:23,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-04-01 09:04:23,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 44. [2023-04-01 09:04:23,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 35 states have internal predecessors, (44), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 09:04:23,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2023-04-01 09:04:23,705 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 24 [2023-04-01 09:04:23,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:04:23,705 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2023-04-01 09:04:23,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 35 states have internal predecessors, (43), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 09:04:23,705 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2023-04-01 09:04:23,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 09:04:23,706 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:04:23,706 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] [2023-04-01 09:04:23,711 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 09:04:23,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:04:23,911 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:04:23,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:04:23,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1404273154, now seen corresponding path program 5 times [2023-04-01 09:04:23,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:04:23,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098562624] [2023-04-01 09:04:23,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:04:23,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:04:23,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:04:23,986 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 09:04:23,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:04:23,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098562624] [2023-04-01 09:04:23,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098562624] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:04:23,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409042095] [2023-04-01 09:04:23,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 09:04:23,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:04:23,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:04:24,001 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 09:04:24,033 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 09:04:24,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 09:04:24,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:04:24,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 09:04:24,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:04:24,139 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 09:04:24,139 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:04:24,194 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 09:04:24,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409042095] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:04:24,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [484327952] [2023-04-01 09:04:24,197 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 09:04:24,198 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:04:24,198 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:04:24,198 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:04:24,198 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:04:24,242 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 86 for LOIs [2023-04-01 09:04:25,434 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 111 for LOIs [2023-04-01 09:04:25,468 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 91 for LOIs [2023-04-01 09:04:25,476 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:04:25,480 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:04:26,846 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1726#(and (exists ((|v_old(#length)_BEFORE_CALL_19| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_19| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_19| (Array Int Int)) (|v_main_~#sum~0.base_BEFORE_CALL_5| Int)) (and (= (select (select |v_old(#memory_int)_BEFORE_CALL_19| 1) 0) 48) (= (select |v_old(#valid)_BEFORE_CALL_19| |v_main_~#sum~0.base_BEFORE_CALL_5|) 0) (= 12 (select |v_old(#length)_BEFORE_CALL_19| 3)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_19| 1) (select |v_old(#memory_int)_BEFORE_CALL_19| 2))) (not (= |v_main_~#sum~0.base_BEFORE_CALL_5| 0)) (= 110 (select (select |v_old(#memory_int)_BEFORE_CALL_19| 2) 2)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_19| 1) |v_old(#valid)_BEFORE_CALL_19|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_19| 2) 3) 100) (not (= 3 |v_main_~#sum~0.base_BEFORE_CALL_5|)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_19| 1) |v_old(#length)_BEFORE_CALL_19|)) (= (select |v_old(#valid)_BEFORE_CALL_19| 0) 0) (not (= |v_main_~#sum~0.base_BEFORE_CALL_5| |#StackHeapBarrier|)) (= 111 (select (select |v_old(#memory_int)_BEFORE_CALL_19| 2) 1)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_19| 2) 0) 99) (not (= |v_old(#length)_BEFORE_CALL_19| (select |v_old(#memory_int)_BEFORE_CALL_19| 2))) (not (= 2 |v_main_~#sum~0.base_BEFORE_CALL_5|)) (= (select |v_old(#valid)_BEFORE_CALL_19| 3) 1) (= (select |v_old(#length)_BEFORE_CALL_19| 1) 2) (not (= |v_main_~#sum~0.base_BEFORE_CALL_5| 1)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_19| 2) 6) 99) (= (select |v_old(#length)_BEFORE_CALL_19| 2) 8) (= (select |v_old(#valid)_BEFORE_CALL_19| 2) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_19| 2) 7) 0) (not (= |v_old(#valid)_BEFORE_CALL_19| (select |v_old(#memory_int)_BEFORE_CALL_19| 2))) (= 1 (select |v_old(#valid)_BEFORE_CALL_19| 1)) (not (= |v_old(#valid)_BEFORE_CALL_19| |v_old(#length)_BEFORE_CALL_19|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_19| 2) 5) 46) (= 103 (select (select |v_old(#memory_int)_BEFORE_CALL_19| 2) 4)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_19| 1) 1) 0))) (exists ((v_main_~a~0.base_BEFORE_CALL_5 Int)) (and (not (= v_main_~a~0.base_BEFORE_CALL_5 0)) (not (= v_main_~a~0.base_BEFORE_CALL_5 |#StackHeapBarrier|)) (not (= (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_5) 0) 0)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (< 0 ~N~0) (= |#NULL.base| 0))' at error location [2023-04-01 09:04:26,846 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:04:26,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 09:04:26,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-04-01 09:04:26,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710712879] [2023-04-01 09:04:26,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 09:04:26,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 09:04:26,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:04:26,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 09:04:26,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=710, Unknown=2, NotChecked=0, Total=812 [2023-04-01 09:04:26,848 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 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 09:04:27,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:04:27,052 INFO L93 Difference]: Finished difference Result 93 states and 109 transitions. [2023-04-01 09:04:27,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 09:04:27,052 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 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 25 [2023-04-01 09:04:27,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:04:27,054 INFO L225 Difference]: With dead ends: 93 [2023-04-01 09:04:27,054 INFO L226 Difference]: Without dead ends: 75 [2023-04-01 09:04:27,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=148, Invalid=1040, Unknown=2, NotChecked=0, Total=1190 [2023-04-01 09:04:27,055 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 22 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:04:27,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 99 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:04:27,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-04-01 09:04:27,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 49. [2023-04-01 09:04:27,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 40 states have internal predecessors, (49), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 09:04:27,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2023-04-01 09:04:27,070 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 25 [2023-04-01 09:04:27,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:04:27,070 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2023-04-01 09:04:27,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 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 09:04:27,071 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2023-04-01 09:04:27,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-01 09:04:27,071 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:04:27,072 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:04:27,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-01 09:04:27,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:04:27,277 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:04:27,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:04:27,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1272415165, now seen corresponding path program 6 times [2023-04-01 09:04:27,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:04:27,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412211483] [2023-04-01 09:04:27,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:04:27,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:04:27,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:04:28,371 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:04:28,371 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:04:28,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412211483] [2023-04-01 09:04:28,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412211483] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:04:28,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845583350] [2023-04-01 09:04:28,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 09:04:28,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:04:28,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:04:28,372 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 09:04:28,374 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 09:04:28,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 09:04:28,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:04:28,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 81 conjunts are in the unsatisfiable core [2023-04-01 09:04:28,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:04:28,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-04-01 09:04:28,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 09:04:28,488 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 09:04:28,521 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-04-01 09:04:28,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-04-01 09:04:28,559 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-04-01 09:04:28,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2023-04-01 09:04:28,656 INFO L321 Elim1Store]: treesize reduction 20, result has 37.5 percent of original size [2023-04-01 09:04:28,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 40 treesize of output 45 [2023-04-01 09:04:28,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 41 [2023-04-01 09:04:28,765 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-04-01 09:04:28,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 40 treesize of output 41 [2023-04-01 09:04:28,878 INFO L321 Elim1Store]: treesize reduction 43, result has 21.8 percent of original size [2023-04-01 09:04:28,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 67 treesize of output 96 [2023-04-01 09:04:28,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 09:04:28,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 99 [2023-04-01 09:04:28,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 09:04:28,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2023-04-01 09:04:29,034 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-04-01 09:04:29,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 82 [2023-04-01 09:04:29,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 09:04:29,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 09:04:29,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2023-04-01 09:04:29,142 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:04:29,143 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:04:30,220 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:04:30,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845583350] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:04:30,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1814480952] [2023-04-01 09:04:30,222 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 09:04:30,222 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:04:30,222 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:04:30,222 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:04:30,223 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:04:30,279 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 86 for LOIs [2023-04-01 09:04:31,411 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 111 for LOIs [2023-04-01 09:04:31,446 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 91 for LOIs [2023-04-01 09:04:31,454 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:04:31,458 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:04:33,526 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2194#(and (exists ((|v_old(#memory_int)_BEFORE_CALL_23| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_23| (Array Int Int)) (|v_main_~#sum~0.base_BEFORE_CALL_6| Int) (|v_old(#length)_BEFORE_CALL_23| (Array Int Int))) (and (= (select (select |v_old(#memory_int)_BEFORE_CALL_23| 1) 0) 48) (= 111 (select (select |v_old(#memory_int)_BEFORE_CALL_23| 2) 1)) (= 12 (select |v_old(#length)_BEFORE_CALL_23| 3)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_23| 2) 0) 99) (= (select |v_old(#valid)_BEFORE_CALL_23| 2) 1) (= (select |v_old(#valid)_BEFORE_CALL_23| 0) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_23| 1) 1) 0) (= 8 (select |v_old(#length)_BEFORE_CALL_23| 2)) (not (= |v_main_~#sum~0.base_BEFORE_CALL_6| |#StackHeapBarrier|)) (not (= 3 |v_main_~#sum~0.base_BEFORE_CALL_6|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_23| 2) 3) 100) (not (= |v_main_~#sum~0.base_BEFORE_CALL_6| 1)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_23| 1) |v_old(#length)_BEFORE_CALL_23|)) (not (= |v_old(#valid)_BEFORE_CALL_23| (select |v_old(#memory_int)_BEFORE_CALL_23| 1))) (not (= |v_old(#valid)_BEFORE_CALL_23| |v_old(#length)_BEFORE_CALL_23|)) (= 110 (select (select |v_old(#memory_int)_BEFORE_CALL_23| 2) 2)) (not (= |v_old(#valid)_BEFORE_CALL_23| (select |v_old(#memory_int)_BEFORE_CALL_23| 2))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_23| 2) 6) 99) (= (select (select |v_old(#memory_int)_BEFORE_CALL_23| 2) 4) 103) (not (= 2 |v_main_~#sum~0.base_BEFORE_CALL_6|)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_23| 2) |v_old(#length)_BEFORE_CALL_23|)) (not (= |v_main_~#sum~0.base_BEFORE_CALL_6| 0)) (= (select |v_old(#valid)_BEFORE_CALL_23| |v_main_~#sum~0.base_BEFORE_CALL_6|) 0) (= (select |v_old(#valid)_BEFORE_CALL_23| 1) 1) (= (select |v_old(#valid)_BEFORE_CALL_23| 3) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_23| 2) 5) 46) (not (= (select |v_old(#memory_int)_BEFORE_CALL_23| 2) (select |v_old(#memory_int)_BEFORE_CALL_23| 1))) (= 0 (select (select |v_old(#memory_int)_BEFORE_CALL_23| 2) 7)) (= (select |v_old(#length)_BEFORE_CALL_23| 1) 2))) (exists ((v_main_~a~0.base_BEFORE_CALL_6 Int)) (and (not (= 0 (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_6) 0))) (not (= v_main_~a~0.base_BEFORE_CALL_6 |#StackHeapBarrier|)) (not (= v_main_~a~0.base_BEFORE_CALL_6 0)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (< 0 ~N~0) (= |#NULL.base| 0))' at error location [2023-04-01 09:04:33,526 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:04:33,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 09:04:33,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2023-04-01 09:04:33,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452714897] [2023-04-01 09:04:33,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 09:04:33,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-04-01 09:04:33,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:04:33,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-04-01 09:04:33,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=3342, Unknown=1, NotChecked=0, Total=3660 [2023-04-01 09:04:33,529 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand has 46 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 44 states have internal predecessors, (51), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2)