/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-crafted/zero_sum_const2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 08:55:57,409 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 08:55:57,410 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 08:55:57,432 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 08:55:57,433 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 08:55:57,434 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 08:55:57,439 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 08:55:57,441 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 08:55:57,443 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 08:55:57,447 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 08:55:57,448 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 08:55:57,457 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 08:55:57,458 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 08:55:57,459 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 08:55:57,461 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 08:55:57,462 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 08:55:57,462 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 08:55:57,462 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 08:55:57,464 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 08:55:57,467 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 08:55:57,468 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 08:55:57,468 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 08:55:57,469 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 08:55:57,470 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 08:55:57,476 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 08:55:57,476 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 08:55:57,476 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 08:55:57,477 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 08:55:57,477 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 08:55:57,478 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 08:55:57,478 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 08:55:57,478 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 08:55:57,478 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 08:55:57,479 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 08:55:57,479 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 08:55:57,479 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 08:55:57,480 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 08:55:57,480 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 08:55:57,480 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 08:55:57,480 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 08:55:57,481 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 08:55:57,483 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 08:55:57,509 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 08:55:57,509 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 08:55:57,510 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 08:55:57,510 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 08:55:57,510 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 08:55:57,510 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 08:55:57,511 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 08:55:57,511 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 08:55:57,511 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 08:55:57,511 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 08:55:57,511 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 08:55:57,511 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 08:55:57,512 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 08:55:57,512 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 08:55:57,512 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 08:55:57,512 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 08:55:57,512 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 08:55:57,512 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 08:55:57,512 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 08:55:57,512 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 08:55:57,513 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 08:55:57,513 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 08:55:57,513 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 08:55:57,513 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 08:55:57,513 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 08:55:57,513 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 08:55:57,513 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 08:55:57,513 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 08:55:57,513 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 08:55:57,513 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 08:55:57,514 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 08:55:57,514 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 08:55:57,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 08:55:57,514 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 08:55:57,514 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 08:55:57,514 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 08:55:57,514 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 08:55:57,514 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 08:55:57,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 08:55:57,514 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 08:55:57,514 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 08:55:57,515 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 08:55:57,682 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 08:55:57,698 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 08:55:57,700 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 08:55:57,701 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 08:55:57,702 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 08:55:57,703 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum_const2.c [2023-04-01 08:55:58,750 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 08:55:58,877 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 08:55:58,877 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const2.c [2023-04-01 08:55:58,881 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0449338d/23cfd3c6f227469b9332e67f5e4dc1ea/FLAG9de1695c2 [2023-04-01 08:55:58,892 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0449338d/23cfd3c6f227469b9332e67f5e4dc1ea [2023-04-01 08:55:58,894 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 08:55:58,894 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 08:55:58,895 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 08:55:58,895 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 08:55:58,897 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 08:55:58,898 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:55:58" (1/1) ... [2023-04-01 08:55:58,899 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f74129e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:55:58, skipping insertion in model container [2023-04-01 08:55:58,899 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:55:58" (1/1) ... [2023-04-01 08:55:58,906 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 08:55:58,915 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 08:55:59,045 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-crafted/zero_sum_const2.c[406,419] [2023-04-01 08:55:59,066 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 08:55:59,076 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 08:55:59,087 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const2.c[406,419] [2023-04-01 08:55:59,099 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 08:55:59,111 INFO L208 MainTranslator]: Completed translation [2023-04-01 08:55:59,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:55:59 WrapperNode [2023-04-01 08:55:59,111 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 08:55:59,112 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 08:55:59,112 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 08:55:59,112 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 08:55:59,120 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:55:59" (1/1) ... [2023-04-01 08:55:59,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:55:59" (1/1) ... [2023-04-01 08:55:59,127 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:55:59" (1/1) ... [2023-04-01 08:55:59,128 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:55:59" (1/1) ... [2023-04-01 08:55:59,143 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:55:59" (1/1) ... [2023-04-01 08:55:59,146 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:55:59" (1/1) ... [2023-04-01 08:55:59,147 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:55:59" (1/1) ... [2023-04-01 08:55:59,147 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:55:59" (1/1) ... [2023-04-01 08:55:59,149 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 08:55:59,149 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 08:55:59,149 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 08:55:59,149 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 08:55:59,150 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:55:59" (1/1) ... [2023-04-01 08:55:59,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 08:55:59,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:55:59,174 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 08:55:59,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 08:55:59,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 08:55:59,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 08:55:59,224 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 08:55:59,226 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 08:55:59,226 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 08:55:59,226 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 08:55:59,226 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 08:55:59,226 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 08:55:59,226 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 08:55:59,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 08:55:59,226 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 08:55:59,227 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 08:55:59,227 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2023-04-01 08:55:59,227 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 08:55:59,227 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 08:55:59,227 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 08:55:59,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 08:55:59,227 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 08:55:59,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 08:55:59,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 08:55:59,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 08:55:59,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 08:55:59,325 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 08:55:59,327 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 08:55:59,490 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 08:55:59,520 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 08:55:59,520 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-04-01 08:55:59,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:55:59 BoogieIcfgContainer [2023-04-01 08:55:59,522 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 08:55:59,524 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 08:55:59,524 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 08:55:59,530 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 08:55:59,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 08:55:58" (1/3) ... [2023-04-01 08:55:59,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fb20a75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:55:59, skipping insertion in model container [2023-04-01 08:55:59,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:55:59" (2/3) ... [2023-04-01 08:55:59,531 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fb20a75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:55:59, skipping insertion in model container [2023-04-01 08:55:59,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:55:59" (3/3) ... [2023-04-01 08:55:59,532 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum_const2.c [2023-04-01 08:55:59,544 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 08:55:59,544 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 08:55:59,590 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 08:55:59,596 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;@48c0916e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 08:55:59,597 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 08:55:59,600 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 16 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 08:55:59,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-01 08:55:59,606 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:55:59,607 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:55:59,607 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:55:59,613 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:55:59,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1774096933, now seen corresponding path program 1 times [2023-04-01 08:55:59,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:55:59,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222201883] [2023-04-01 08:55:59,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:55:59,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:55:59,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:55:59,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:55:59,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:55:59,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222201883] [2023-04-01 08:55:59,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222201883] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 08:55:59,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 08:55:59,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 08:55:59,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661744175] [2023-04-01 08:55:59,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 08:55:59,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 08:55:59,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:55:59,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 08:55:59,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 08:55:59,892 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 16 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:55:59,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:55:59,947 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2023-04-01 08:55:59,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 08:55:59,949 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-04-01 08:55:59,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:55:59,953 INFO L225 Difference]: With dead ends: 38 [2023-04-01 08:55:59,954 INFO L226 Difference]: Without dead ends: 17 [2023-04-01 08:55:59,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 08:55:59,960 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:55:59,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:55:59,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-04-01 08:55:59,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-04-01 08:55:59,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:55:59,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2023-04-01 08:55:59,986 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 15 [2023-04-01 08:55:59,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:55:59,987 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2023-04-01 08:55:59,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:55:59,988 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2023-04-01 08:55:59,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-01 08:55:59,988 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:55:59,988 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:55:59,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 08:55:59,989 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:55:59,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:55:59,989 INFO L85 PathProgramCache]: Analyzing trace with hash 468065968, now seen corresponding path program 1 times [2023-04-01 08:55:59,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:55:59,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032330546] [2023-04-01 08:55:59,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:55:59,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:56:00,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:56:00,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 08:56:00,111 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:56:00,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032330546] [2023-04-01 08:56:00,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032330546] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 08:56:00,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 08:56:00,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 08:56:00,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162859436] [2023-04-01 08:56:00,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 08:56:00,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 08:56:00,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:56:00,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 08:56:00,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 08:56:00,113 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:56:00,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:56:00,149 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2023-04-01 08:56:00,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 08:56:00,149 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), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-04-01 08:56:00,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:56:00,150 INFO L225 Difference]: With dead ends: 29 [2023-04-01 08:56:00,150 INFO L226 Difference]: Without dead ends: 21 [2023-04-01 08:56:00,150 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 08:56:00,155 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 16 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:56:00,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 15 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:56:00,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-01 08:56:00,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-04-01 08:56:00,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:56:00,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-04-01 08:56:00,164 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 16 [2023-04-01 08:56:00,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:56:00,164 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-04-01 08:56:00,165 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), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:56:00,165 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-04-01 08:56:00,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 08:56:00,165 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:56:00,165 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:56:00,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 08:56:00,166 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:56:00,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:56:00,166 INFO L85 PathProgramCache]: Analyzing trace with hash -158031230, now seen corresponding path program 1 times [2023-04-01 08:56:00,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:56:00,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941420299] [2023-04-01 08:56:00,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:56:00,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:56:00,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:56:00,266 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 08:56:00,266 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:56:00,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941420299] [2023-04-01 08:56:00,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941420299] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:56:00,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994047528] [2023-04-01 08:56:00,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:56:00,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:56:00,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:56:00,284 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:56:00,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 08:56:00,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:56:00,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 08:56:00,370 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:56:00,434 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 08:56:00,434 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:56:00,457 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 08:56:00,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994047528] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:56:00,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [13451580] [2023-04-01 08:56:00,491 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 08:56:00,491 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:56:00,494 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:56:00,498 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:56:00,499 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:56:00,661 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 56 for LOIs [2023-04-01 08:56:01,596 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 70 for LOIs [2023-04-01 08:56:01,627 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 08:56:01,632 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:56:02,298 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '328#(and (= ~MAX~0 100000) (not (= ~SIZE~0 100000)) (exists ((v_main_~a~0.base_BEFORE_CALL_1 Int) (|v_old(#length)_BEFORE_CALL_1| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_1| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_1| (Array Int Int))) (and (= (select |v_old(#valid)_BEFORE_CALL_1| 3) 1) (not (= |v_old(#valid)_BEFORE_CALL_1| |v_old(#length)_BEFORE_CALL_1|)) (= (select |v_old(#length)_BEFORE_CALL_1| 3) 12) (not (= (select |v_old(#memory_int)_BEFORE_CALL_1| 1) |v_old(#valid)_BEFORE_CALL_1|)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_1| 1) 0)) (= (select |v_old(#valid)_BEFORE_CALL_1| 1) 1) (not (= v_main_~a~0.base_BEFORE_CALL_1 0)) (not (= v_main_~a~0.base_BEFORE_CALL_1 3)) (= (select |v_old(#valid)_BEFORE_CALL_1| v_main_~a~0.base_BEFORE_CALL_1) 0) (= 2 (select |v_old(#length)_BEFORE_CALL_1| 1)) (= (select |v_old(#valid)_BEFORE_CALL_1| 2) 1) (not (= v_main_~a~0.base_BEFORE_CALL_1 1)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_1| 1) |v_old(#length)_BEFORE_CALL_1|)) (not (= v_main_~a~0.base_BEFORE_CALL_1 |#StackHeapBarrier|)) (= (select |v_old(#valid)_BEFORE_CALL_1| 0) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_1| 1) 1) 0) (= (select |v_old(#length)_BEFORE_CALL_1| 2) 18) (not (= v_main_~a~0.base_BEFORE_CALL_1 2)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (not (= ~SIZE~0 1)) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 08:56:02,299 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:56:02,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:56:02,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-01 08:56:02,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132288706] [2023-04-01 08:56:02,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:56:02,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 08:56:02,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:56:02,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 08:56:02,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2023-04-01 08:56:02,301 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:56:02,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:56:02,363 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2023-04-01 08:56:02,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 08:56:02,364 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-04-01 08:56:02,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:56:02,365 INFO L225 Difference]: With dead ends: 35 [2023-04-01 08:56:02,365 INFO L226 Difference]: Without dead ends: 22 [2023-04-01 08:56:02,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2023-04-01 08:56:02,368 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:56:02,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 08:56:02,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-04-01 08:56:02,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-04-01 08:56:02,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:56:02,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-04-01 08:56:02,376 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 20 [2023-04-01 08:56:02,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:56:02,376 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-04-01 08:56:02,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:56:02,376 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-04-01 08:56:02,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 08:56:02,376 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:56:02,377 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] [2023-04-01 08:56:02,382 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 08:56:02,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:56:02,578 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:56:02,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:56:02,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1484141783, now seen corresponding path program 2 times [2023-04-01 08:56:02,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:56:02,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620010693] [2023-04-01 08:56:02,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:56:02,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:56:02,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:56:02,648 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 08:56:02,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:56:02,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620010693] [2023-04-01 08:56:02,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620010693] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:56:02,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893163137] [2023-04-01 08:56:02,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 08:56:02,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:56:02,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:56:02,653 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:56:02,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 08:56:02,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 08:56:02,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:56:02,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 08:56:02,705 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:56:02,734 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 08:56:02,734 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:56:02,764 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 08:56:02,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893163137] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:56:02,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1522042413] [2023-04-01 08:56:02,766 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 08:56:02,766 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:56:02,766 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:56:02,766 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:56:02,767 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:56:02,818 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 56 for LOIs [2023-04-01 08:56:03,262 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 70 for LOIs [2023-04-01 08:56:03,284 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 08:56:03,288 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:56:03,880 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '571#(and (exists ((v_main_~a~0.base_BEFORE_CALL_2 Int) (|v_old(#valid)_BEFORE_CALL_2| (Array Int Int)) (|v_old(#length)_BEFORE_CALL_2| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_2| (Array Int (Array Int Int)))) (and (not (= v_main_~a~0.base_BEFORE_CALL_2 1)) (= (select |v_old(#valid)_BEFORE_CALL_2| v_main_~a~0.base_BEFORE_CALL_2) 0) (= 2 (select |v_old(#length)_BEFORE_CALL_2| 1)) (not (= v_main_~a~0.base_BEFORE_CALL_2 0)) (= (select |v_old(#length)_BEFORE_CALL_2| 3) 12) (= (select (select |v_old(#memory_int)_BEFORE_CALL_2| 1) 1) 0) (= (select |v_old(#length)_BEFORE_CALL_2| 2) 18) (= (select |v_old(#valid)_BEFORE_CALL_2| 0) 0) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_2| 1) 0)) (not (= |v_old(#length)_BEFORE_CALL_2| (select |v_old(#memory_int)_BEFORE_CALL_2| 1))) (not (= |v_old(#valid)_BEFORE_CALL_2| (select |v_old(#memory_int)_BEFORE_CALL_2| 1))) (not (= |v_old(#valid)_BEFORE_CALL_2| |v_old(#length)_BEFORE_CALL_2|)) (= (select |v_old(#valid)_BEFORE_CALL_2| 2) 1) (not (= v_main_~a~0.base_BEFORE_CALL_2 3)) (not (= v_main_~a~0.base_BEFORE_CALL_2 |#StackHeapBarrier|)) (= (select |v_old(#valid)_BEFORE_CALL_2| 3) 1) (not (= v_main_~a~0.base_BEFORE_CALL_2 2)) (= (select |v_old(#valid)_BEFORE_CALL_2| 1) 1))) (= ~MAX~0 100000) (not (= ~SIZE~0 100000)) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (not (= ~SIZE~0 1)) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 08:56:03,880 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:56:03,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:56:03,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-04-01 08:56:03,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344594276] [2023-04-01 08:56:03,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:56:03,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 08:56:03,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:56:03,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 08:56:03,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2023-04-01 08:56:03,882 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:56:03,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:56:03,922 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2023-04-01 08:56:03,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 08:56:03,928 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-04-01 08:56:03,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:56:03,929 INFO L225 Difference]: With dead ends: 37 [2023-04-01 08:56:03,929 INFO L226 Difference]: Without dead ends: 26 [2023-04-01 08:56:03,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2023-04-01 08:56:03,930 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:56:03,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 24 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:56:03,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-04-01 08:56:03,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-04-01 08:56:03,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:56:03,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2023-04-01 08:56:03,933 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 21 [2023-04-01 08:56:03,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:56:03,933 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2023-04-01 08:56:03,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:56:03,934 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2023-04-01 08:56:03,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 08:56:03,934 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:56:03,934 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:56:03,948 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 08:56:04,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-04-01 08:56:04,137 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:56:04,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:56:04,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1221124997, now seen corresponding path program 3 times [2023-04-01 08:56:04,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:56:04,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703726697] [2023-04-01 08:56:04,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:56:04,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:56:04,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:56:05,190 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:56:05,190 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:56:05,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703726697] [2023-04-01 08:56:05,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703726697] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:56:05,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124044639] [2023-04-01 08:56:05,191 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 08:56:05,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:56:05,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:56:05,192 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:56:05,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 08:56:05,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 08:56:05,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:56:05,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 50 conjunts are in the unsatisfiable core [2023-04-01 08:56:05,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:56:05,492 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 08:56:05,492 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:56:05,771 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 08:56:05,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2023-04-01 08:56:05,938 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:56:05,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124044639] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:56:05,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [28529380] [2023-04-01 08:56:05,941 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 08:56:05,941 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:56:05,941 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:56:05,941 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:56:05,941 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:56:05,979 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 56 for LOIs [2023-04-01 08:56:06,464 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 70 for LOIs [2023-04-01 08:56:06,488 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 08:56:06,492 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:56:07,470 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '875#(and (= ~MAX~0 100000) (not (= ~SIZE~0 100000)) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (exists ((|v_old(#length)_BEFORE_CALL_3| (Array Int Int)) (|v_old(#valid)_BEFORE_CALL_3| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_3| (Array Int (Array Int Int))) (v_main_~a~0.base_BEFORE_CALL_3 Int)) (and (not (= v_main_~a~0.base_BEFORE_CALL_3 1)) (= (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| v_main_~a~0.base_BEFORE_CALL_3) 0) (= (select |v_old(#valid)_BEFORE_CALL_3| 0) 0) (not (= v_main_~a~0.base_BEFORE_CALL_3 2)) (not (= |v_old(#valid)_BEFORE_CALL_3| |v_old(#length)_BEFORE_CALL_3|)) (not (= v_main_~a~0.base_BEFORE_CALL_3 3)) (= 2 (select |v_old(#length)_BEFORE_CALL_3| 1)) (= (select |v_old(#length)_BEFORE_CALL_3| 3) 12) (not (= |v_old(#length)_BEFORE_CALL_3| (select |v_old(#memory_int)_BEFORE_CALL_3| 1))) (= (select |v_old(#length)_BEFORE_CALL_3| 2) 18) (not (= v_main_~a~0.base_BEFORE_CALL_3 |#StackHeapBarrier|)) (not (= |v_old(#valid)_BEFORE_CALL_3| (select |v_old(#memory_int)_BEFORE_CALL_3| 1))) (= (select |v_old(#valid)_BEFORE_CALL_3| 2) 1) (not (= v_main_~a~0.base_BEFORE_CALL_3 0)) (= (select |v_old(#valid)_BEFORE_CALL_3| 1) 1) (= (select |v_old(#valid)_BEFORE_CALL_3| 3) 1))) (not (= ~SIZE~0 1)) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 08:56:07,470 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:56:07,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:56:07,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 15] total 33 [2023-04-01 08:56:07,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208125871] [2023-04-01 08:56:07,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:56:07,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-04-01 08:56:07,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:56:07,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-04-01 08:56:07,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1723, Unknown=0, NotChecked=0, Total=1892 [2023-04-01 08:56:07,472 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 33 states, 33 states have (on average 1.606060606060606) internal successors, (53), 31 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:56:08,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:56:08,133 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2023-04-01 08:56:08,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 08:56:08,133 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.606060606060606) internal successors, (53), 31 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-04-01 08:56:08,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:56:08,134 INFO L225 Difference]: With dead ends: 41 [2023-04-01 08:56:08,134 INFO L226 Difference]: Without dead ends: 36 [2023-04-01 08:56:08,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=277, Invalid=2693, Unknown=0, NotChecked=0, Total=2970 [2023-04-01 08:56:08,135 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 4 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 08:56:08,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 97 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 08:56:08,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-04-01 08:56:08,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2023-04-01 08:56:08,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:56:08,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2023-04-01 08:56:08,142 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 25 [2023-04-01 08:56:08,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:56:08,142 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2023-04-01 08:56:08,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.606060606060606) internal successors, (53), 31 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:56:08,142 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2023-04-01 08:56:08,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 08:56:08,143 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:56:08,143 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:56:08,162 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 08:56:08,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:56:08,348 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:56:08,348 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:56:08,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1814212233, now seen corresponding path program 4 times [2023-04-01 08:56:08,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:56:08,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319769838] [2023-04-01 08:56:08,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:56:08,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:56:08,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:56:08,426 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 08:56:08,427 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:56:08,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319769838] [2023-04-01 08:56:08,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319769838] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:56:08,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000530285] [2023-04-01 08:56:08,427 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 08:56:08,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:56:08,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:56:08,428 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 08:56:08,460 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 08:56:08,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:56:08,487 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 08:56:08,488 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:56:08,534 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 08:56:08,534 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:56:08,568 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 08:56:08,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000530285] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:56:08,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1538798329] [2023-04-01 08:56:08,571 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 08:56:08,571 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:56:08,571 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:56:08,572 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:56:08,572 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:56:08,612 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 56 for LOIs [2023-04-01 08:56:09,042 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 70 for LOIs [2023-04-01 08:56:09,061 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 08:56:09,065 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:56:09,667 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1211#(and (= ~MAX~0 100000) (not (= ~SIZE~0 100000)) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (exists ((|v_old(#memory_int)_BEFORE_CALL_4| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_4| (Array Int Int)) (|v_old(#length)_BEFORE_CALL_4| (Array Int Int)) (v_main_~a~0.base_BEFORE_CALL_4 Int)) (and (= (select |v_old(#length)_BEFORE_CALL_4| 1) 2) (not (= v_main_~a~0.base_BEFORE_CALL_4 1)) (= (select |v_old(#valid)_BEFORE_CALL_4| 1) 1) (= (select |v_old(#valid)_BEFORE_CALL_4| 0) 0) (not (= |v_old(#valid)_BEFORE_CALL_4| |v_old(#length)_BEFORE_CALL_4|)) (= (select |v_old(#length)_BEFORE_CALL_4| 2) 18) (not (= (select |v_old(#memory_int)_BEFORE_CALL_4| 1) |v_old(#length)_BEFORE_CALL_4|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_4| 1) 1) 0) (= (select |v_old(#valid)_BEFORE_CALL_4| v_main_~a~0.base_BEFORE_CALL_4) 0) (not (= v_main_~a~0.base_BEFORE_CALL_4 0)) (= (select |v_old(#valid)_BEFORE_CALL_4| 3) 1) (not (= v_main_~a~0.base_BEFORE_CALL_4 3)) (= (select |v_old(#length)_BEFORE_CALL_4| 3) 12) (not (= v_main_~a~0.base_BEFORE_CALL_4 2)) (not (= |v_old(#valid)_BEFORE_CALL_4| (select |v_old(#memory_int)_BEFORE_CALL_4| 1))) (= (select |v_old(#valid)_BEFORE_CALL_4| 2) 1) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_4| 1) 0)) (not (= v_main_~a~0.base_BEFORE_CALL_4 |#StackHeapBarrier|)))) (not (= ~SIZE~0 1)) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 08:56:09,667 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:56:09,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:56:09,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2023-04-01 08:56:09,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433998212] [2023-04-01 08:56:09,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:56:09,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 08:56:09,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:56:09,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 08:56:09,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2023-04-01 08:56:09,669 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:56:09,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:56:09,788 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2023-04-01 08:56:09,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 08:56:09,788 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2023-04-01 08:56:09,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:56:09,790 INFO L225 Difference]: With dead ends: 66 [2023-04-01 08:56:09,790 INFO L226 Difference]: Without dead ends: 39 [2023-04-01 08:56:09,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2023-04-01 08:56:09,791 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 6 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:56:09,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 37 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 08:56:09,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-04-01 08:56:09,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2023-04-01 08:56:09,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:56:09,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2023-04-01 08:56:09,796 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 26 [2023-04-01 08:56:09,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:56:09,797 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2023-04-01 08:56:09,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:56:09,797 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2023-04-01 08:56:09,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-01 08:56:09,797 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:56:09,797 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:56:09,802 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-01 08:56:10,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:56:10,002 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:56:10,003 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:56:10,003 INFO L85 PathProgramCache]: Analyzing trace with hash 658182156, now seen corresponding path program 5 times [2023-04-01 08:56:10,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:56:10,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940681935] [2023-04-01 08:56:10,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:56:10,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:56:10,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:56:10,087 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 08:56:10,087 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:56:10,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940681935] [2023-04-01 08:56:10,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940681935] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:56:10,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052056909] [2023-04-01 08:56:10,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 08:56:10,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:56:10,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:56:10,088 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 08:56:10,113 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 08:56:10,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 08:56:10,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:56:10,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 08:56:10,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:56:10,184 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 08:56:10,184 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:56:10,228 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 08:56:10,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052056909] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:56:10,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1306471877] [2023-04-01 08:56:10,230 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 08:56:10,230 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:56:10,230 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:56:10,230 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:56:10,230 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:56:10,269 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 56 for LOIs [2023-04-01 08:56:10,680 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 70 for LOIs [2023-04-01 08:56:10,702 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 08:56:10,705 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:56:11,288 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1592#(and (= ~MAX~0 100000) (not (= ~SIZE~0 100000)) (exists ((|v_old(#memory_int)_BEFORE_CALL_5| (Array Int (Array Int Int))) (|v_old(#length)_BEFORE_CALL_5| (Array Int Int)) (|v_old(#valid)_BEFORE_CALL_5| (Array Int Int)) (v_main_~a~0.base_BEFORE_CALL_5 Int)) (and (not (= |v_old(#valid)_BEFORE_CALL_5| (select |v_old(#memory_int)_BEFORE_CALL_5| 1))) (not (= v_main_~a~0.base_BEFORE_CALL_5 0)) (= (select |v_old(#valid)_BEFORE_CALL_5| 1) 1) (not (= v_main_~a~0.base_BEFORE_CALL_5 1)) (= 18 (select |v_old(#length)_BEFORE_CALL_5| 2)) (= (select |v_old(#valid)_BEFORE_CALL_5| v_main_~a~0.base_BEFORE_CALL_5) 0) (not (= v_main_~a~0.base_BEFORE_CALL_5 2)) (= (select |v_old(#length)_BEFORE_CALL_5| 3) 12) (= (select |v_old(#valid)_BEFORE_CALL_5| 2) 1) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_5| 1) 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_5| 1) 1) 0) (not (= (select |v_old(#memory_int)_BEFORE_CALL_5| 1) |v_old(#length)_BEFORE_CALL_5|)) (= (select |v_old(#valid)_BEFORE_CALL_5| 0) 0) (not (= v_main_~a~0.base_BEFORE_CALL_5 |#StackHeapBarrier|)) (not (= v_main_~a~0.base_BEFORE_CALL_5 3)) (= (select |v_old(#valid)_BEFORE_CALL_5| 3) 1) (not (= |v_old(#valid)_BEFORE_CALL_5| |v_old(#length)_BEFORE_CALL_5|)) (= 2 (select |v_old(#length)_BEFORE_CALL_5| 1)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (not (= ~SIZE~0 1)) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 08:56:11,288 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:56:11,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:56:11,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-04-01 08:56:11,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470278424] [2023-04-01 08:56:11,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:56:11,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 08:56:11,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:56:11,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 08:56:11,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2023-04-01 08:56:11,290 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:56:11,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:56:11,412 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2023-04-01 08:56:11,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 08:56:11,419 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2023-04-01 08:56:11,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:56:11,420 INFO L225 Difference]: With dead ends: 42 [2023-04-01 08:56:11,420 INFO L226 Difference]: Without dead ends: 31 [2023-04-01 08:56:11,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 60 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2023-04-01 08:56:11,421 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 11 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:56:11,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 57 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 08:56:11,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-04-01 08:56:11,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-04-01 08:56:11,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:56:11,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2023-04-01 08:56:11,426 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 27 [2023-04-01 08:56:11,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:56:11,426 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2023-04-01 08:56:11,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:56:11,426 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2023-04-01 08:56:11,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 08:56:11,427 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:56:11,427 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:56:11,432 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 08:56:11,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:56:11,632 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:56:11,632 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:56:11,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1553220770, now seen corresponding path program 6 times [2023-04-01 08:56:11,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:56:11,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109807553] [2023-04-01 08:56:11,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:56:11,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:56:11,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:56:13,033 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:56:13,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:56:13,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109807553] [2023-04-01 08:56:13,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109807553] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:56:13,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655103965] [2023-04-01 08:56:13,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 08:56:13,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:56:13,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:56:13,035 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 08:56:13,037 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 08:56:13,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 08:56:13,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:56:13,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 64 conjunts are in the unsatisfiable core [2023-04-01 08:56:13,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:56:13,433 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 08:56:13,433 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:56:13,996 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 08:56:13,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 89 [2023-04-01 08:56:14,252 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 08:56:14,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655103965] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:56:14,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [727820970] [2023-04-01 08:56:14,253 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 08:56:14,253 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:56:14,253 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:56:14,254 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:56:14,254 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:56:14,294 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 56 for LOIs [2023-04-01 08:56:14,725 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 70 for LOIs [2023-04-01 08:56:14,749 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 08:56:14,752 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:56:15,733 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1970#(and (= ~MAX~0 100000) (not (= ~SIZE~0 100000)) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (exists ((|v_old(#valid)_BEFORE_CALL_6| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_6| (Array Int (Array Int Int))) (|v_old(#length)_BEFORE_CALL_6| (Array Int Int)) (v_main_~a~0.base_BEFORE_CALL_6 Int)) (and (not (= v_main_~a~0.base_BEFORE_CALL_6 |#StackHeapBarrier|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_6| 1) 1) 0) (= (select |v_old(#valid)_BEFORE_CALL_6| 3) 1) (= (select |v_old(#length)_BEFORE_CALL_6| 3) 12) (not (= |v_old(#valid)_BEFORE_CALL_6| |v_old(#length)_BEFORE_CALL_6|)) (not (= v_main_~a~0.base_BEFORE_CALL_6 2)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_6| 1) 0) 48) (not (= (select |v_old(#memory_int)_BEFORE_CALL_6| 1) |v_old(#length)_BEFORE_CALL_6|)) (= (select |v_old(#valid)_BEFORE_CALL_6| 2) 1) (= (select |v_old(#valid)_BEFORE_CALL_6| v_main_~a~0.base_BEFORE_CALL_6) 0) (= (select |v_old(#length)_BEFORE_CALL_6| 1) 2) (not (= |v_old(#valid)_BEFORE_CALL_6| (select |v_old(#memory_int)_BEFORE_CALL_6| 1))) (= 18 (select |v_old(#length)_BEFORE_CALL_6| 2)) (not (= v_main_~a~0.base_BEFORE_CALL_6 0)) (not (= v_main_~a~0.base_BEFORE_CALL_6 1)) (= (select |v_old(#valid)_BEFORE_CALL_6| 1) 1) (not (= v_main_~a~0.base_BEFORE_CALL_6 3)) (= (select |v_old(#valid)_BEFORE_CALL_6| 0) 0))) (not (= ~SIZE~0 1)) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 08:56:15,733 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:56:15,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:56:15,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 15, 17] total 47 [2023-04-01 08:56:15,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837348939] [2023-04-01 08:56:15,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:56:15,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-04-01 08:56:15,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:56:15,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-04-01 08:56:15,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=3082, Unknown=0, NotChecked=0, Total=3306 [2023-04-01 08:56:15,738 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 47 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 45 states have internal predecessors, (66), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:56:17,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:56:17,410 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2023-04-01 08:56:17,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-01 08:56:17,411 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 45 states have internal predecessors, (66), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2023-04-01 08:56:17,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:56:17,412 INFO L225 Difference]: With dead ends: 53 [2023-04-01 08:56:17,412 INFO L226 Difference]: Without dead ends: 48 [2023-04-01 08:56:17,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1297 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=464, Invalid=5542, Unknown=0, NotChecked=0, Total=6006 [2023-04-01 08:56:17,414 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 6 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 08:56:17,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 152 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 805 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 08:56:17,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-04-01 08:56:17,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2023-04-01 08:56:17,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 36 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:56:17,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2023-04-01 08:56:17,422 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 30 [2023-04-01 08:56:17,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:56:17,422 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2023-04-01 08:56:17,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 45 states have internal predecessors, (66), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:56:17,422 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2023-04-01 08:56:17,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-01 08:56:17,423 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:56:17,423 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:56:17,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 08:56:17,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:56:17,627 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:56:17,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:56:17,628 INFO L85 PathProgramCache]: Analyzing trace with hash -78014370, now seen corresponding path program 7 times [2023-04-01 08:56:17,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:56:17,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297313113] [2023-04-01 08:56:17,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:56:17,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:56:17,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:56:17,707 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 08:56:17,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:56:17,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297313113] [2023-04-01 08:56:17,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297313113] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:56:17,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458158211] [2023-04-01 08:56:17,709 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 08:56:17,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:56:17,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:56:17,710 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:56:17,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 08:56:17,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:56:17,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 08:56:17,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:56:17,847 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 08:56:17,847 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:56:17,900 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 08:56:17,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458158211] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:56:17,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1181119889] [2023-04-01 08:56:17,901 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 08:56:17,901 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:56:17,901 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:56:17,902 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:56:17,902 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:56:17,926 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 56 for LOIs [2023-04-01 08:56:18,289 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 70 for LOIs [2023-04-01 08:56:18,308 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 08:56:18,311 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:56:18,912 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2395#(and (exists ((|v_old(#valid)_BEFORE_CALL_7| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_7| (Array Int (Array Int Int))) (|v_old(#length)_BEFORE_CALL_7| (Array Int Int)) (v_main_~a~0.base_BEFORE_CALL_7 Int)) (and (= (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) (= 18 (select |v_old(#length)_BEFORE_CALL_7| 2)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 1) 0) 48) (= (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|)) (= 2 (select |v_old(#length)_BEFORE_CALL_7| 1)) (= (select |v_old(#valid)_BEFORE_CALL_7| v_main_~a~0.base_BEFORE_CALL_7) 0) (not (= v_main_~a~0.base_BEFORE_CALL_7 3)) (not (= v_main_~a~0.base_BEFORE_CALL_7 1)) (= (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 (= v_main_~a~0.base_BEFORE_CALL_7 2)) (not (= v_main_~a~0.base_BEFORE_CALL_7 0)) (not (= v_main_~a~0.base_BEFORE_CALL_7 |#StackHeapBarrier|)) (not (= |v_old(#valid)_BEFORE_CALL_7| |v_old(#length)_BEFORE_CALL_7|)))) (= ~MAX~0 100000) (not (= ~SIZE~0 100000)) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (not (= ~SIZE~0 1)) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 08:56:18,912 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:56:18,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:56:18,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2023-04-01 08:56:18,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236825317] [2023-04-01 08:56:18,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:56:18,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 08:56:18,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:56:18,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 08:56:18,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2023-04-01 08:56:18,914 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:56:19,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:56:19,068 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2023-04-01 08:56:19,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 08:56:19,068 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2023-04-01 08:56:19,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:56:19,069 INFO L225 Difference]: With dead ends: 80 [2023-04-01 08:56:19,069 INFO L226 Difference]: Without dead ends: 46 [2023-04-01 08:56:19,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 71 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2023-04-01 08:56:19,070 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 3 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:56:19,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 35 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 08:56:19,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-04-01 08:56:19,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2023-04-01 08:56:19,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 38 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:56:19,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2023-04-01 08:56:19,077 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 31 [2023-04-01 08:56:19,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:56:19,077 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2023-04-01 08:56:19,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:56:19,077 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2023-04-01 08:56:19,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 08:56:19,078 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:56:19,078 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:56:19,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 08:56:19,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:56:19,285 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:56:19,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:56:19,285 INFO L85 PathProgramCache]: Analyzing trace with hash 824487657, now seen corresponding path program 8 times [2023-04-01 08:56:19,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:56:19,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613108268] [2023-04-01 08:56:19,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:56:19,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:56:19,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:56:19,386 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 08:56:19,386 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:56:19,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613108268] [2023-04-01 08:56:19,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613108268] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:56:19,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476407259] [2023-04-01 08:56:19,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 08:56:19,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:56:19,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:56:19,388 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:56:19,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 08:56:19,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 08:56:19,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:56:19,454 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 08:56:19,455 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:56:19,515 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 08:56:19,515 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:56:19,584 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 08:56:19,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476407259] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:56:19,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1439577027] [2023-04-01 08:56:19,586 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 08:56:19,586 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:56:19,587 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:56:19,587 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:56:19,587 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:56:19,616 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 56 for LOIs [2023-04-01 08:56:19,984 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 70 for LOIs [2023-04-01 08:56:20,005 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 08:56:20,009 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:56:20,590 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2853#(and (= ~MAX~0 100000) (not (= ~SIZE~0 100000)) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (not (= ~SIZE~0 1)) (= |#NULL.offset| 0) (exists ((|v_old(#memory_int)_BEFORE_CALL_8| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_8| (Array Int Int)) (v_main_~a~0.base_BEFORE_CALL_8 Int) (|v_old(#length)_BEFORE_CALL_8| (Array Int Int))) (and (= 18 (select |v_old(#length)_BEFORE_CALL_8| 2)) (not (= v_main_~a~0.base_BEFORE_CALL_8 3)) (not (= |v_old(#valid)_BEFORE_CALL_8| |v_old(#length)_BEFORE_CALL_8|)) (not (= v_main_~a~0.base_BEFORE_CALL_8 |#StackHeapBarrier|)) (= (select |v_old(#valid)_BEFORE_CALL_8| v_main_~a~0.base_BEFORE_CALL_8) 0) (= 12 (select |v_old(#length)_BEFORE_CALL_8| 3)) (not (= |v_old(#length)_BEFORE_CALL_8| (select |v_old(#memory_int)_BEFORE_CALL_8| 1))) (not (= v_main_~a~0.base_BEFORE_CALL_8 0)) (not (= v_main_~a~0.base_BEFORE_CALL_8 2)) (= (select |v_old(#valid)_BEFORE_CALL_8| 1) 1) (= (select |v_old(#length)_BEFORE_CALL_8| 1) 2) (= (select |v_old(#valid)_BEFORE_CALL_8| 0) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_8| 1) 0) 48) (not (= |v_old(#valid)_BEFORE_CALL_8| (select |v_old(#memory_int)_BEFORE_CALL_8| 1))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_8| 1) 1) 0) (not (= v_main_~a~0.base_BEFORE_CALL_8 1)) (= (select |v_old(#valid)_BEFORE_CALL_8| 3) 1) (= (select |v_old(#valid)_BEFORE_CALL_8| 2) 1))) (= |#NULL.base| 0))' at error location [2023-04-01 08:56:20,591 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:56:20,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:56:20,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-04-01 08:56:20,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446847338] [2023-04-01 08:56:20,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:56:20,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 08:56:20,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:56:20,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 08:56:20,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2023-04-01 08:56:20,592 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:56:20,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:56:20,725 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2023-04-01 08:56:20,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 08:56:20,725 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2023-04-01 08:56:20,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:56:20,726 INFO L225 Difference]: With dead ends: 49 [2023-04-01 08:56:20,726 INFO L226 Difference]: Without dead ends: 36 [2023-04-01 08:56:20,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 72 SyntacticMatches, 8 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=158, Invalid=964, Unknown=0, NotChecked=0, Total=1122 [2023-04-01 08:56:20,727 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 11 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:56:20,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 64 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 08:56:20,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-04-01 08:56:20,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-04-01 08:56:20,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:56:20,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2023-04-01 08:56:20,732 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 32 [2023-04-01 08:56:20,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:56:20,732 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2023-04-01 08:56:20,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:56:20,732 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2023-04-01 08:56:20,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-01 08:56:20,733 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:56:20,733 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:56:20,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-04-01 08:56:20,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 08:56:20,937 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:56:20,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:56:20,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1502964965, now seen corresponding path program 9 times [2023-04-01 08:56:20,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:56:20,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233894846] [2023-04-01 08:56:20,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:56:20,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:56:20,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:56:22,789 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:56:22,789 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:56:22,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233894846] [2023-04-01 08:56:22,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233894846] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:56:22,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546558349] [2023-04-01 08:56:22,790 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 08:56:22,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:56:22,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:56:22,791 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:56:22,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 08:56:22,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 08:56:22,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:56:22,849 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 85 conjunts are in the unsatisfiable core [2023-04-01 08:56:22,851 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:56:22,897 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 13 treesize of output 9 [2023-04-01 08:56:23,320 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 08:56:23,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:56:24,175 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 08:56:24,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546558349] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:56:24,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1409977263] [2023-04-01 08:56:24,176 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 08:56:24,176 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:56:24,176 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:56:24,177 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:56:24,177 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:56:24,206 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 56 for LOIs [2023-04-01 08:56:24,610 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 70 for LOIs [2023-04-01 08:56:24,627 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 08:56:24,630 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:56:25,692 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3298#(and (= ~MAX~0 100000) (exists ((|v_old(#valid)_BEFORE_CALL_9| (Array Int Int)) (v_main_~a~0.base_BEFORE_CALL_9 Int) (|v_old(#length)_BEFORE_CALL_9| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_9| (Array Int (Array Int Int)))) (and (= (select |v_old(#valid)_BEFORE_CALL_9| 1) 1) (= (select |v_old(#valid)_BEFORE_CALL_9| v_main_~a~0.base_BEFORE_CALL_9) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_9| 1) 1) 0) (not (= v_main_~a~0.base_BEFORE_CALL_9 0)) (= (select |v_old(#valid)_BEFORE_CALL_9| 2) 1) (= (select |v_old(#length)_BEFORE_CALL_9| 3) 12) (not (= v_main_~a~0.base_BEFORE_CALL_9 3)) (not (= v_main_~a~0.base_BEFORE_CALL_9 1)) (not (= v_main_~a~0.base_BEFORE_CALL_9 2)) (= 18 (select |v_old(#length)_BEFORE_CALL_9| 2)) (= (select |v_old(#valid)_BEFORE_CALL_9| 0) 0) (not (= |v_old(#length)_BEFORE_CALL_9| (select |v_old(#memory_int)_BEFORE_CALL_9| 1))) (not (= v_main_~a~0.base_BEFORE_CALL_9 |#StackHeapBarrier|)) (not (= |v_old(#valid)_BEFORE_CALL_9| (select |v_old(#memory_int)_BEFORE_CALL_9| 1))) (not (= |v_old(#valid)_BEFORE_CALL_9| |v_old(#length)_BEFORE_CALL_9|)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_9| 1) 0)) (= (select |v_old(#valid)_BEFORE_CALL_9| 3) 1) (= (select |v_old(#length)_BEFORE_CALL_9| 1) 2))) (not (= ~SIZE~0 100000)) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (not (= ~SIZE~0 1)) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 08:56:25,692 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:56:25,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:56:25,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 17, 21] total 58 [2023-04-01 08:56:25,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83371725] [2023-04-01 08:56:25,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:56:25,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-04-01 08:56:25,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:56:25,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-04-01 08:56:25,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=4383, Unknown=0, NotChecked=0, Total=4692 [2023-04-01 08:56:25,694 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 58 states, 58 states have (on average 1.3793103448275863) internal successors, (80), 56 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:56:29,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:56:29,038 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2023-04-01 08:56:29,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-04-01 08:56:29,038 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.3793103448275863) internal successors, (80), 56 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2023-04-01 08:56:29,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:56:29,039 INFO L225 Difference]: With dead ends: 68 [2023-04-01 08:56:29,039 INFO L226 Difference]: Without dead ends: 62 [2023-04-01 08:56:29,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2585 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=852, Invalid=9450, Unknown=0, NotChecked=0, Total=10302 [2023-04-01 08:56:29,042 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 10 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 1143 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 1317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 1143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 08:56:29,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 154 Invalid, 1317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 1143 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 08:56:29,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-04-01 08:56:29,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 43. [2023-04-01 08:56:29,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 38 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:56:29,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2023-04-01 08:56:29,052 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 35 [2023-04-01 08:56:29,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:56:29,052 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2023-04-01 08:56:29,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.3793103448275863) internal successors, (80), 56 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:56:29,052 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2023-04-01 08:56:29,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-01 08:56:29,053 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:56:29,053 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:56:29,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 08:56:29,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:56:29,257 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:56:29,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:56:29,257 INFO L85 PathProgramCache]: Analyzing trace with hash -2078284247, now seen corresponding path program 10 times [2023-04-01 08:56:29,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:56:29,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681307333] [2023-04-01 08:56:29,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:56:29,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:56:29,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:56:29,366 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-01 08:56:29,366 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:56:29,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681307333] [2023-04-01 08:56:29,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681307333] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:56:29,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446101478] [2023-04-01 08:56:29,367 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 08:56:29,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:56:29,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:56:29,368 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:56:29,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 08:56:29,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:56:29,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 08:56:29,428 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:56:29,508 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-01 08:56:29,508 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:56:29,571 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-01 08:56:29,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446101478] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:56:29,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [995119226] [2023-04-01 08:56:29,574 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 08:56:29,574 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:56:29,574 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:56:29,574 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:56:29,574 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:56:29,608 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 56 for LOIs [2023-04-01 08:56:29,952 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 70 for LOIs [2023-04-01 08:56:29,969 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 08:56:29,972 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:56:30,616 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3817#(and (= ~MAX~0 100000) (exists ((|v_old(#memory_int)_BEFORE_CALL_10| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_10| (Array Int Int)) (v_main_~a~0.base_BEFORE_CALL_10 Int) (|v_old(#length)_BEFORE_CALL_10| (Array Int Int))) (and (not (= |v_old(#valid)_BEFORE_CALL_10| |v_old(#length)_BEFORE_CALL_10|)) (= (select |v_old(#length)_BEFORE_CALL_10| 2) 18) (= (select |v_old(#length)_BEFORE_CALL_10| 3) 12) (not (= v_main_~a~0.base_BEFORE_CALL_10 2)) (not (= |v_old(#valid)_BEFORE_CALL_10| (select |v_old(#memory_int)_BEFORE_CALL_10| 1))) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_10| 1) 0)) (not (= v_main_~a~0.base_BEFORE_CALL_10 1)) (not (= v_main_~a~0.base_BEFORE_CALL_10 0)) (= 2 (select |v_old(#length)_BEFORE_CALL_10| 1)) (= (select |v_old(#valid)_BEFORE_CALL_10| 3) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_10| 1) 1) 0) (= (select |v_old(#valid)_BEFORE_CALL_10| 1) 1) (not (= (select |v_old(#memory_int)_BEFORE_CALL_10| 1) |v_old(#length)_BEFORE_CALL_10|)) (= (select |v_old(#valid)_BEFORE_CALL_10| v_main_~a~0.base_BEFORE_CALL_10) 0) (= (select |v_old(#valid)_BEFORE_CALL_10| 2) 1) (not (= v_main_~a~0.base_BEFORE_CALL_10 |#StackHeapBarrier|)) (= (select |v_old(#valid)_BEFORE_CALL_10| 0) 0) (not (= v_main_~a~0.base_BEFORE_CALL_10 3)))) (not (= ~SIZE~0 100000)) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (not (= ~SIZE~0 1)) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 08:56:30,617 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:56:30,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:56:30,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-04-01 08:56:30,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253236497] [2023-04-01 08:56:30,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:56:30,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-01 08:56:30,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:56:30,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-01 08:56:30,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=791, Unknown=0, NotChecked=0, Total=930 [2023-04-01 08:56:30,618 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:56:30,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:56:30,798 INFO L93 Difference]: Finished difference Result 100 states and 117 transitions. [2023-04-01 08:56:30,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 08:56:30,799 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2023-04-01 08:56:30,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:56:30,799 INFO L225 Difference]: With dead ends: 100 [2023-04-01 08:56:30,799 INFO L226 Difference]: Without dead ends: 52 [2023-04-01 08:56:30,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 82 SyntacticMatches, 9 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 08:56:30,800 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 10 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:56:30,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 61 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 08:56:30,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-04-01 08:56:30,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2023-04-01 08:56:30,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.15) internal successors, (46), 40 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:56:30,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2023-04-01 08:56:30,812 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 36 [2023-04-01 08:56:30,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:56:30,812 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2023-04-01 08:56:30,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:56:30,813 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2023-04-01 08:56:30,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-01 08:56:30,813 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:56:30,813 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:56:30,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 08:56:31,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-01 08:56:31,018 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:56:31,018 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:56:31,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1038632574, now seen corresponding path program 11 times [2023-04-01 08:56:31,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:56:31,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931400402] [2023-04-01 08:56:31,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:56:31,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:56:31,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:56:31,137 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-04-01 08:56:31,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:56:31,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931400402] [2023-04-01 08:56:31,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931400402] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:56:31,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989069742] [2023-04-01 08:56:31,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 08:56:31,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:56:31,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:56:31,138 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:56:31,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 08:56:31,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-01 08:56:31,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:56:31,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 08:56:31,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:56:31,267 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-04-01 08:56:31,267 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:56:31,325 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-04-01 08:56:31,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989069742] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:56:31,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1251970454] [2023-04-01 08:56:31,326 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 08:56:31,327 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:56:31,327 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:56:31,327 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:56:31,327 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:56:31,351 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 56 for LOIs [2023-04-01 08:56:31,709 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 70 for LOIs [2023-04-01 08:56:31,726 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 08:56:31,729 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:56:32,306 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4357#(and (= ~MAX~0 100000) (not (= ~SIZE~0 100000)) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 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_~a~0.base_BEFORE_CALL_11 Int) (|v_old(#length)_BEFORE_CALL_11| (Array Int Int))) (and (= 18 (select |v_old(#length)_BEFORE_CALL_11| 2)) (not (= v_main_~a~0.base_BEFORE_CALL_11 0)) (not (= |v_old(#valid)_BEFORE_CALL_11| (select |v_old(#memory_int)_BEFORE_CALL_11| 1))) (= 1 (select |v_old(#valid)_BEFORE_CALL_11| 2)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_11| 1) 1) 0) (not (= v_main_~a~0.base_BEFORE_CALL_11 1)) (not (= v_main_~a~0.base_BEFORE_CALL_11 3)) (not (= |v_old(#length)_BEFORE_CALL_11| (select |v_old(#memory_int)_BEFORE_CALL_11| 1))) (not (= v_main_~a~0.base_BEFORE_CALL_11 |#StackHeapBarrier|)) (= 12 (select |v_old(#length)_BEFORE_CALL_11| 3)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_11| 1) 0)) (= (select |v_old(#valid)_BEFORE_CALL_11| 1) 1) (not (= v_main_~a~0.base_BEFORE_CALL_11 2)) (= (select |v_old(#valid)_BEFORE_CALL_11| v_main_~a~0.base_BEFORE_CALL_11) 0) (= (select |v_old(#valid)_BEFORE_CALL_11| 3) 1) (= (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 (= ~SIZE~0 1)) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 08:56:32,306 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:56:32,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:56:32,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-04-01 08:56:32,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318720572] [2023-04-01 08:56:32,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:56:32,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-01 08:56:32,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:56:32,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-01 08:56:32,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2023-04-01 08:56:32,308 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:56:32,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:56:32,489 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2023-04-01 08:56:32,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 08:56:32,490 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2023-04-01 08:56:32,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:56:32,496 INFO L225 Difference]: With dead ends: 51 [2023-04-01 08:56:32,496 INFO L226 Difference]: Without dead ends: 41 [2023-04-01 08:56:32,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 92 SyntacticMatches, 10 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=202, Invalid=1204, Unknown=0, NotChecked=0, Total=1406 [2023-04-01 08:56:32,498 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 12 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:56:32,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 67 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 08:56:32,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-04-01 08:56:32,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-04-01 08:56:32,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:56:32,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2023-04-01 08:56:32,520 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 38 [2023-04-01 08:56:32,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:56:32,521 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2023-04-01 08:56:32,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:56:32,521 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2023-04-01 08:56:32,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-04-01 08:56:32,523 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:56:32,523 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:56:32,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-01 08:56:32,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-01 08:56:32,737 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:56:32,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:56:32,737 INFO L85 PathProgramCache]: Analyzing trace with hash 782593730, now seen corresponding path program 12 times [2023-04-01 08:56:32,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:56:32,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492151182] [2023-04-01 08:56:32,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:56:32,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:56:32,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:56:34,908 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 3 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:56:34,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:56:34,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492151182] [2023-04-01 08:56:34,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492151182] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:56:34,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178070035] [2023-04-01 08:56:34,909 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 08:56:34,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:56:34,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:56:34,910 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:56:34,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-01 08:56:34,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 08:56:34,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:56:34,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 98 conjunts are in the unsatisfiable core [2023-04-01 08:56:34,989 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:56:35,044 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 13 treesize of output 9 [2023-04-01 08:56:35,630 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 5 proven. 60 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 08:56:35,630 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:56:36,822 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 08:56:36,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178070035] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:56:36,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [152821142] [2023-04-01 08:56:36,824 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 08:56:36,824 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:56:36,824 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:56:36,824 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:56:36,824 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:56:36,860 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 56 for LOIs [2023-04-01 08:56:37,248 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 70 for LOIs [2023-04-01 08:56:37,271 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 08:56:37,274 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:56:38,425 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4862#(and (= ~MAX~0 100000) (exists ((|v_old(#memory_int)_BEFORE_CALL_12| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_12| (Array Int Int)) (v_main_~a~0.base_BEFORE_CALL_12 Int) (|v_old(#length)_BEFORE_CALL_12| (Array Int Int))) (and (not (= v_main_~a~0.base_BEFORE_CALL_12 |#StackHeapBarrier|)) (not (= v_main_~a~0.base_BEFORE_CALL_12 2)) (= (select |v_old(#length)_BEFORE_CALL_12| 3) 12) (= (select |v_old(#valid)_BEFORE_CALL_12| 3) 1) (not (= v_main_~a~0.base_BEFORE_CALL_12 1)) (not (= |v_old(#valid)_BEFORE_CALL_12| (select |v_old(#memory_int)_BEFORE_CALL_12| 1))) (= (select |v_old(#valid)_BEFORE_CALL_12| 2) 1) (= (select |v_old(#length)_BEFORE_CALL_12| 1) 2) (= (select |v_old(#valid)_BEFORE_CALL_12| v_main_~a~0.base_BEFORE_CALL_12) 0) (not (= v_main_~a~0.base_BEFORE_CALL_12 3)) (not (= |v_old(#valid)_BEFORE_CALL_12| |v_old(#length)_BEFORE_CALL_12|)) (= 0 (select (select |v_old(#memory_int)_BEFORE_CALL_12| 1) 1)) (not (= |v_old(#length)_BEFORE_CALL_12| (select |v_old(#memory_int)_BEFORE_CALL_12| 1))) (= (select |v_old(#valid)_BEFORE_CALL_12| 1) 1) (= (select |v_old(#length)_BEFORE_CALL_12| 2) 18) (not (= v_main_~a~0.base_BEFORE_CALL_12 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_12| 1) 0) 48) (= (select |v_old(#valid)_BEFORE_CALL_12| 0) 0))) (not (= ~SIZE~0 100000)) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (not (= ~SIZE~0 1)) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 08:56:38,425 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:56:38,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:56:38,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 19, 23] total 67 [2023-04-01 08:56:38,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973765876] [2023-04-01 08:56:38,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:56:38,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2023-04-01 08:56:38,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:56:38,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2023-04-01 08:56:38,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=5647, Unknown=0, NotChecked=0, Total=6006 [2023-04-01 08:56:38,428 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 67 states, 67 states have (on average 1.373134328358209) internal successors, (92), 65 states have internal predecessors, (92), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:56:41,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:56:41,436 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2023-04-01 08:56:41,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-04-01 08:56:41,436 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.373134328358209) internal successors, (92), 65 states have internal predecessors, (92), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2023-04-01 08:56:41,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:56:41,438 INFO L225 Difference]: With dead ends: 69 [2023-04-01 08:56:41,438 INFO L226 Difference]: Without dead ends: 64 [2023-04-01 08:56:41,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3054 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=785, Invalid=10345, Unknown=0, NotChecked=0, Total=11130 [2023-04-01 08:56:41,440 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 10 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 1273 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 1392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 08:56:41,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 160 Invalid, 1392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1273 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 08:56:41,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-04-01 08:56:41,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 55. [2023-04-01 08:56:41,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.16) internal successors, (58), 50 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:56:41,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2023-04-01 08:56:41,457 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 40 [2023-04-01 08:56:41,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:56:41,457 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2023-04-01 08:56:41,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.373134328358209) internal successors, (92), 65 states have internal predecessors, (92), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:56:41,457 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2023-04-01 08:56:41,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 08:56:41,458 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:56:41,458 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:56:41,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-04-01 08:56:41,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-04-01 08:56:41,662 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:56:41,662 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:56:41,662 INFO L85 PathProgramCache]: Analyzing trace with hash -605825730, now seen corresponding path program 13 times [2023-04-01 08:56:41,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:56:41,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564999541] [2023-04-01 08:56:41,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:56:41,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:56:41,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:56:41,770 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-04-01 08:56:41,770 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:56:41,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564999541] [2023-04-01 08:56:41,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564999541] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:56:41,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493812421] [2023-04-01 08:56:41,770 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 08:56:41,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:56:41,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:56:41,772 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:56:41,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-01 08:56:41,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:56:41,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 14 conjunts are in the unsatisfiable core [2023-04-01 08:56:41,853 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:56:41,949 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-04-01 08:56:41,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:56:42,014 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-04-01 08:56:42,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493812421] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:56:42,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [59341686] [2023-04-01 08:56:42,019 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 08:56:42,019 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:56:42,019 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:56:42,019 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:56:42,019 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:56:42,043 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 56 for LOIs [2023-04-01 08:56:42,406 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 70 for LOIs [2023-04-01 08:56:42,426 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 08:56:42,429 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:56:43,064 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5429#(and (exists ((|v_old(#length)_BEFORE_CALL_13| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_13| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_13| (Array Int Int)) (v_main_~a~0.base_BEFORE_CALL_13 Int)) (and (= 18 (select |v_old(#length)_BEFORE_CALL_13| 2)) (= (select |v_old(#valid)_BEFORE_CALL_13| 0) 0) (= (select |v_old(#valid)_BEFORE_CALL_13| 3) 1) (not (= (select |v_old(#memory_int)_BEFORE_CALL_13| 1) |v_old(#length)_BEFORE_CALL_13|)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_13| 1) 0)) (not (= |v_old(#valid)_BEFORE_CALL_13| (select |v_old(#memory_int)_BEFORE_CALL_13| 1))) (not (= v_main_~a~0.base_BEFORE_CALL_13 1)) (not (= v_main_~a~0.base_BEFORE_CALL_13 0)) (= (select |v_old(#valid)_BEFORE_CALL_13| 1) 1) (not (= v_main_~a~0.base_BEFORE_CALL_13 3)) (= 2 (select |v_old(#length)_BEFORE_CALL_13| 1)) (not (= v_main_~a~0.base_BEFORE_CALL_13 |#StackHeapBarrier|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_13| 1) 1) 0) (= (select |v_old(#valid)_BEFORE_CALL_13| v_main_~a~0.base_BEFORE_CALL_13) 0) (not (= v_main_~a~0.base_BEFORE_CALL_13 2)) (= (select |v_old(#valid)_BEFORE_CALL_13| 2) 1) (not (= |v_old(#valid)_BEFORE_CALL_13| |v_old(#length)_BEFORE_CALL_13|)) (= 12 (select |v_old(#length)_BEFORE_CALL_13| 3)))) (= ~MAX~0 100000) (not (= ~SIZE~0 100000)) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (not (= ~SIZE~0 1)) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 08:56:43,064 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:56:43,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:56:43,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 22 [2023-04-01 08:56:43,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560195168] [2023-04-01 08:56:43,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:56:43,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-04-01 08:56:43,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:56:43,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-04-01 08:56:43,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 08:56:43,071 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:56:43,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:56:43,273 INFO L93 Difference]: Finished difference Result 108 states and 125 transitions. [2023-04-01 08:56:43,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 08:56:43,273 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2023-04-01 08:56:43,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:56:43,274 INFO L225 Difference]: With dead ends: 108 [2023-04-01 08:56:43,274 INFO L226 Difference]: Without dead ends: 60 [2023-04-01 08:56:43,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 95 SyntacticMatches, 10 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=233, Invalid=1249, Unknown=0, NotChecked=0, Total=1482 [2023-04-01 08:56:43,275 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 7 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:56:43,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 23 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 08:56:43,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-04-01 08:56:43,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2023-04-01 08:56:43,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.1346153846153846) internal successors, (59), 52 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:56:43,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2023-04-01 08:56:43,291 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 41 [2023-04-01 08:56:43,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:56:43,291 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2023-04-01 08:56:43,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:56:43,291 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2023-04-01 08:56:43,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-01 08:56:43,292 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:56:43,292 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:56:43,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-04-01 08:56:43,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-04-01 08:56:43,497 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:56:43,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:56:43,497 INFO L85 PathProgramCache]: Analyzing trace with hash 259553801, now seen corresponding path program 14 times [2023-04-01 08:56:43,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:56:43,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102199553] [2023-04-01 08:56:43,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:56:43,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:56:43,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:56:43,628 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-04-01 08:56:43,629 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:56:43,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102199553] [2023-04-01 08:56:43,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102199553] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:56:43,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385049309] [2023-04-01 08:56:43,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 08:56:43,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:56:43,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:56:43,630 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:56:43,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-04-01 08:56:43,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-01 08:56:43,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:56:43,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 14 conjunts are in the unsatisfiable core [2023-04-01 08:56:43,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:56:43,842 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-04-01 08:56:43,842 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:56:43,935 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-04-01 08:56:43,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385049309] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:56:43,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1077429571] [2023-04-01 08:56:43,936 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 08:56:43,936 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:56:43,936 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:56:43,936 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:56:43,937 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:56:43,963 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 56 for LOIs [2023-04-01 08:56:44,320 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 70 for LOIs [2023-04-01 08:56:44,337 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 08:56:44,340 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:56:44,969 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6041#(and (= ~MAX~0 100000) (exists ((|v_old(#length)_BEFORE_CALL_14| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_14| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_14| (Array Int Int)) (v_main_~a~0.base_BEFORE_CALL_14 Int)) (and (not (= (select |v_old(#memory_int)_BEFORE_CALL_14| 1) |v_old(#length)_BEFORE_CALL_14|)) (= (select |v_old(#valid)_BEFORE_CALL_14| 2) 1) (not (= v_main_~a~0.base_BEFORE_CALL_14 2)) (= (select |v_old(#length)_BEFORE_CALL_14| 1) 2) (not (= v_main_~a~0.base_BEFORE_CALL_14 0)) (= (select |v_old(#valid)_BEFORE_CALL_14| v_main_~a~0.base_BEFORE_CALL_14) 0) (= (select |v_old(#length)_BEFORE_CALL_14| 2) 18) (not (= v_main_~a~0.base_BEFORE_CALL_14 1)) (= (select |v_old(#valid)_BEFORE_CALL_14| 3) 1) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_14| 1) 0)) (= (select |v_old(#valid)_BEFORE_CALL_14| 0) 0) (not (= |v_old(#valid)_BEFORE_CALL_14| |v_old(#length)_BEFORE_CALL_14|)) (not (= v_main_~a~0.base_BEFORE_CALL_14 |#StackHeapBarrier|)) (not (= v_main_~a~0.base_BEFORE_CALL_14 3)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_14| 1) 1) 0) (= 12 (select |v_old(#length)_BEFORE_CALL_14| 3)) (= (select |v_old(#valid)_BEFORE_CALL_14| 1) 1) (not (= (select |v_old(#memory_int)_BEFORE_CALL_14| 1) |v_old(#valid)_BEFORE_CALL_14|)))) (not (= ~SIZE~0 100000)) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (not (= ~SIZE~0 1)) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 08:56:44,969 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:56:44,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:56:44,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-04-01 08:56:44,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167936933] [2023-04-01 08:56:44,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:56:44,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-01 08:56:44,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:56:44,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-01 08:56:44,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=961, Unknown=0, NotChecked=0, Total=1122 [2023-04-01 08:56:44,971 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:56:45,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:56:45,169 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2023-04-01 08:56:45,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 08:56:45,170 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2023-04-01 08:56:45,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:56:45,170 INFO L225 Difference]: With dead ends: 63 [2023-04-01 08:56:45,170 INFO L226 Difference]: Without dead ends: 46 [2023-04-01 08:56:45,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 96 SyntacticMatches, 12 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=253, Invalid=1469, Unknown=0, NotChecked=0, Total=1722 [2023-04-01 08:56:45,171 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 8 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:56:45,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 34 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 08:56:45,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-04-01 08:56:45,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2023-04-01 08:56:45,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 41 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:56:45,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2023-04-01 08:56:45,183 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 42 [2023-04-01 08:56:45,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:56:45,184 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2023-04-01 08:56:45,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:56:45,184 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2023-04-01 08:56:45,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-01 08:56:45,184 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:56:45,184 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:56:45,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-04-01 08:56:45,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:56:45,390 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:56:45,390 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:56:45,390 INFO L85 PathProgramCache]: Analyzing trace with hash 314453573, now seen corresponding path program 15 times [2023-04-01 08:56:45,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:56:45,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924564606] [2023-04-01 08:56:45,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:56:45,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:56:45,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:56:48,301 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 3 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:56:48,301 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:56:48,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924564606] [2023-04-01 08:56:48,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924564606] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:56:48,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60101554] [2023-04-01 08:56:48,302 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 08:56:48,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:56:48,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:56:48,303 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:56:48,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-04-01 08:56:48,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 08:56:48,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:56:48,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 112 conjunts are in the unsatisfiable core [2023-04-01 08:56:48,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:56:49,163 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 6 proven. 84 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 08:56:49,164 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:56:50,772 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 08:56:50,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 104 treesize of output 336 [2023-04-01 08:56:53,841 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 08:56:53,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60101554] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:56:53,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [217708830] [2023-04-01 08:56:53,842 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 08:56:53,842 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:56:53,842 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:56:53,843 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:56:53,843 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:56:53,865 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 56 for LOIs [2023-04-01 08:56:54,192 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 70 for LOIs [2023-04-01 08:56:54,207 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 08:56:54,209 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:56:55,488 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6617#(and (= ~MAX~0 100000) (not (= ~SIZE~0 100000)) (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_~a~0.base_BEFORE_CALL_15 Int)) (and (= (select |v_old(#length)_BEFORE_CALL_15| 2) 18) (= (select |v_old(#valid)_BEFORE_CALL_15| 2) 1) (= (select |v_old(#length)_BEFORE_CALL_15| 3) 12) (= (select |v_old(#valid)_BEFORE_CALL_15| 0) 0) (not (= v_main_~a~0.base_BEFORE_CALL_15 2)) (not (= v_main_~a~0.base_BEFORE_CALL_15 3)) (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))) (not (= v_main_~a~0.base_BEFORE_CALL_15 1)) (= (select |v_old(#valid)_BEFORE_CALL_15| v_main_~a~0.base_BEFORE_CALL_15) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_15| 1) 0) 48) (not (= v_main_~a~0.base_BEFORE_CALL_15 |#StackHeapBarrier|)) (not (= v_main_~a~0.base_BEFORE_CALL_15 0)) (= (select |v_old(#length)_BEFORE_CALL_15| 1) 2) (= (select |v_old(#valid)_BEFORE_CALL_15| 1) 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| 1) 1) 0))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (not (= ~SIZE~0 1)) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 08:56:55,488 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:56:55,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:56:55,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 21, 26] total 77 [2023-04-01 08:56:55,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246578746] [2023-04-01 08:56:55,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:56:55,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2023-04-01 08:56:55,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:56:55,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2023-04-01 08:56:55,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=7275, Unknown=0, NotChecked=0, Total=7656 [2023-04-01 08:56:55,491 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 77 states, 77 states have (on average 1.3636363636363635) internal successors, (105), 75 states have internal predecessors, (105), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)