/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/array-tiling/rew.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 02:48:09,419 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 02:48:09,420 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 02:48:09,444 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 02:48:09,445 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 02:48:09,447 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 02:48:09,449 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 02:48:09,451 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 02:48:09,454 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 02:48:09,458 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 02:48:09,459 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 02:48:09,459 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 02:48:09,460 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 02:48:09,460 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 02:48:09,461 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 02:48:09,461 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 02:48:09,462 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 02:48:09,462 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 02:48:09,463 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 02:48:09,464 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 02:48:09,465 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 02:48:09,469 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 02:48:09,470 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 02:48:09,470 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 02:48:09,472 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 02:48:09,472 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 02:48:09,472 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 02:48:09,473 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 02:48:09,473 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 02:48:09,474 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 02:48:09,474 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 02:48:09,474 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 02:48:09,475 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 02:48:09,475 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 02:48:09,476 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 02:48:09,476 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 02:48:09,476 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 02:48:09,477 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 02:48:09,477 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 02:48:09,477 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 02:48:09,478 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 02:48:09,482 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 02:48:09,513 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 02:48:09,514 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 02:48:09,514 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 02:48:09,514 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 02:48:09,515 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 02:48:09,515 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 02:48:09,515 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 02:48:09,515 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 02:48:09,515 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 02:48:09,515 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 02:48:09,516 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 02:48:09,516 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 02:48:09,516 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 02:48:09,516 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 02:48:09,516 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 02:48:09,516 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 02:48:09,516 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 02:48:09,516 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 02:48:09,517 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 02:48:09,517 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 02:48:09,517 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 02:48:09,517 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 02:48:09,517 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 02:48:09,517 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 02:48:09,517 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 02:48:09,517 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 02:48:09,517 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 02:48:09,518 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 02:48:09,518 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 02:48:09,518 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 02:48:09,518 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 02:48:09,518 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 02:48:09,518 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 02:48:09,518 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 02:48:09,518 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 02:48:09,518 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 02:48:09,518 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 02:48:09,519 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 02:48:09,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 02:48:09,519 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 02:48:09,519 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 02:48:09,519 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 02:48:09,695 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 02:48:09,728 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 02:48:09,729 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 02:48:09,730 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 02:48:09,731 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 02:48:09,732 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/rew.c [2023-04-01 02:48:10,815 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 02:48:10,946 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 02:48:10,946 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/rew.c [2023-04-01 02:48:10,950 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fbad9af9/617e3fc919fd440bbeb8c6bbfaf751bb/FLAGb76a7e5e4 [2023-04-01 02:48:10,960 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fbad9af9/617e3fc919fd440bbeb8c6bbfaf751bb [2023-04-01 02:48:10,962 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 02:48:10,963 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 02:48:10,963 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 02:48:10,963 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 02:48:10,966 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 02:48:10,966 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 02:48:10" (1/1) ... [2023-04-01 02:48:10,967 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35f6e42b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:48:10, skipping insertion in model container [2023-04-01 02:48:10,967 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 02:48:10" (1/1) ... [2023-04-01 02:48:10,971 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 02:48:10,980 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 02:48:11,114 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-tiling/rew.c[394,407] [2023-04-01 02:48:11,129 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 02:48:11,138 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 02:48:11,151 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-tiling/rew.c[394,407] [2023-04-01 02:48:11,163 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 02:48:11,174 INFO L208 MainTranslator]: Completed translation [2023-04-01 02:48:11,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:48:11 WrapperNode [2023-04-01 02:48:11,174 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 02:48:11,175 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 02:48:11,175 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 02:48:11,175 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 02:48:11,183 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:48:11" (1/1) ... [2023-04-01 02:48:11,184 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:48:11" (1/1) ... [2023-04-01 02:48:11,189 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:48:11" (1/1) ... [2023-04-01 02:48:11,189 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:48:11" (1/1) ... [2023-04-01 02:48:11,200 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:48:11" (1/1) ... [2023-04-01 02:48:11,204 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:48:11" (1/1) ... [2023-04-01 02:48:11,209 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:48:11" (1/1) ... [2023-04-01 02:48:11,210 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:48:11" (1/1) ... [2023-04-01 02:48:11,213 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 02:48:11,214 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 02:48:11,214 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 02:48:11,214 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 02:48:11,215 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:48:11" (1/1) ... [2023-04-01 02:48:11,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 02:48:11,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:48:11,237 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 02:48:11,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 02:48:11,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 02:48:11,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 02:48:11,276 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 02:48:11,276 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 02:48:11,276 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 02:48:11,276 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 02:48:11,276 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 02:48:11,276 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 02:48:11,276 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 02:48:11,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 02:48:11,277 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 02:48:11,277 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 02:48:11,277 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 02:48:11,277 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 02:48:11,277 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 02:48:11,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 02:48:11,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 02:48:11,277 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 02:48:11,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 02:48:11,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 02:48:11,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 02:48:11,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 02:48:11,365 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 02:48:11,366 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 02:48:11,533 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 02:48:11,567 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 02:48:11,568 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 02:48:11,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 02:48:11 BoogieIcfgContainer [2023-04-01 02:48:11,570 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 02:48:11,571 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 02:48:11,571 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 02:48:11,573 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 02:48:11,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 02:48:10" (1/3) ... [2023-04-01 02:48:11,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78852ded and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 02:48:11, skipping insertion in model container [2023-04-01 02:48:11,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:48:11" (2/3) ... [2023-04-01 02:48:11,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78852ded and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 02:48:11, skipping insertion in model container [2023-04-01 02:48:11,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 02:48:11" (3/3) ... [2023-04-01 02:48:11,575 INFO L112 eAbstractionObserver]: Analyzing ICFG rew.c [2023-04-01 02:48:11,590 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 02:48:11,590 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 02:48:11,633 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 02:48:11,639 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;@78880abe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 02:48:11,640 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 02:48:11,643 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 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 02:48:11,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-01 02:48:11,648 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:48:11,649 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:48:11,649 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:48:11,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:48:11,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1538200716, now seen corresponding path program 1 times [2023-04-01 02:48:11,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:48:11,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265725141] [2023-04-01 02:48:11,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:48:11,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:48:11,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:48:11,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:48:11,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:48:11,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265725141] [2023-04-01 02:48:11,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265725141] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:48:11,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 02:48:11,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 02:48:11,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711586526] [2023-04-01 02:48:11,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:48:11,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 02:48:11,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:48:11,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 02:48:11,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 02:48:11,901 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 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 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 02:48:11,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:48:11,940 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2023-04-01 02:48:11,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 02:48:11,943 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 12 [2023-04-01 02:48:11,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:48:11,947 INFO L225 Difference]: With dead ends: 34 [2023-04-01 02:48:11,947 INFO L226 Difference]: Without dead ends: 17 [2023-04-01 02:48:11,949 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 02:48:11,951 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:48:11,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:48:11,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-04-01 02:48:11,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-04-01 02:48:11,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:48:11,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2023-04-01 02:48:11,979 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 12 [2023-04-01 02:48:11,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:48:11,979 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2023-04-01 02:48:11,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 02:48:11,980 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2023-04-01 02:48:11,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-01 02:48:11,980 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:48:11,980 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:48:11,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 02:48:11,983 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:48:11,983 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:48:11,984 INFO L85 PathProgramCache]: Analyzing trace with hash -866847342, now seen corresponding path program 1 times [2023-04-01 02:48:11,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:48:11,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536862306] [2023-04-01 02:48:11,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:48:11,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:48:12,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:48:12,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:48:12,130 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:48:12,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536862306] [2023-04-01 02:48:12,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536862306] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:48:12,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157050114] [2023-04-01 02:48:12,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:48:12,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:48:12,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:48:12,138 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:48:12,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 02:48:12,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:48:12,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 02:48:12,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:48:12,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:48:12,280 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:48:12,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:48:12,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157050114] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:48:12,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1713685383] [2023-04-01 02:48:12,338 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 02:48:12,338 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:48:12,341 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:48:12,345 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:48:12,347 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:48:12,485 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-01 02:48:12,711 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-04-01 02:48:12,737 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 02:48:12,748 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:48:13,180 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '180#(and (<= 1 |#StackHeapBarrier|) (= ~MAX~0 100000) (exists ((v_main_~a~0.base_BEFORE_CALL_1 Int)) (and (<= (+ v_main_~a~0.base_BEFORE_CALL_1 1) |#StackHeapBarrier|) (< (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_1) 0) 2))) (<= 2 ~SIZE~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~SIZE~0 99999) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:48:13,180 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:48:13,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:48:13,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-01 02:48:13,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26983470] [2023-04-01 02:48:13,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:48:13,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 02:48:13,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:48:13,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 02:48:13,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2023-04-01 02:48:13,184 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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 02:48:13,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:48:13,213 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2023-04-01 02:48:13,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 02:48:13,213 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-04-01 02:48:13,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:48:13,214 INFO L225 Difference]: With dead ends: 27 [2023-04-01 02:48:13,214 INFO L226 Difference]: Without dead ends: 18 [2023-04-01 02:48:13,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2023-04-01 02:48:13,216 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:48:13,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 29 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:48:13,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-04-01 02:48:13,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-04-01 02:48:13,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:48:13,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2023-04-01 02:48:13,222 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2023-04-01 02:48:13,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:48:13,223 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2023-04-01 02:48:13,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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 02:48:13,223 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2023-04-01 02:48:13,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-01 02:48:13,224 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:48:13,224 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:48:13,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 02:48:13,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:48:13,429 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:48:13,430 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:48:13,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1529729228, now seen corresponding path program 2 times [2023-04-01 02:48:13,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:48:13,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223997652] [2023-04-01 02:48:13,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:48:13,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:48:13,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:48:13,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:48:13,799 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:48:13,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223997652] [2023-04-01 02:48:13,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223997652] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:48:13,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848574414] [2023-04-01 02:48:13,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:48:13,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:48:13,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:48:13,809 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:48:13,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 02:48:13,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 02:48:13,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:48:13,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-01 02:48:13,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:48:13,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 02:48:14,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2023-04-01 02:48:14,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 48 [2023-04-01 02:48:14,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 02:48:14,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2023-04-01 02:48:14,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-04-01 02:48:14,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 02:48:14,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:48:14,165 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:48:14,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2023-04-01 02:48:14,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 50 [2023-04-01 02:48:14,657 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:48:14,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848574414] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:48:14,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1632696995] [2023-04-01 02:48:14,662 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 02:48:14,662 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:48:14,662 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:48:14,663 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:48:14,663 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:48:14,702 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-01 02:48:14,793 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-04-01 02:48:14,808 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 02:48:14,814 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:48:15,316 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '361#(and (<= 1 |#StackHeapBarrier|) (= ~MAX~0 100000) (<= 2 ~SIZE~0) (exists ((v_main_~a~0.base_BEFORE_CALL_2 Int)) (and (<= (+ v_main_~a~0.base_BEFORE_CALL_2 1) |#StackHeapBarrier|) (< (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_2) 0) 2))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~SIZE~0 99999) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:48:15,316 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:48:15,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:48:15,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-04-01 02:48:15,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877800301] [2023-04-01 02:48:15,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:48:15,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-01 02:48:15,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:48:15,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-01 02:48:15,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2023-04-01 02:48:15,318 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 21 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:48:15,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:48:15,488 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2023-04-01 02:48:15,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 02:48:15,489 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-04-01 02:48:15,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:48:15,489 INFO L225 Difference]: With dead ends: 27 [2023-04-01 02:48:15,489 INFO L226 Difference]: Without dead ends: 25 [2023-04-01 02:48:15,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 02:48:15,490 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 17 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:48:15,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 83 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:48:15,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-04-01 02:48:15,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2023-04-01 02:48:15,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 02:48:15,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2023-04-01 02:48:15,494 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 14 [2023-04-01 02:48:15,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:48:15,495 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2023-04-01 02:48:15,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:48:15,495 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2023-04-01 02:48:15,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 02:48:15,495 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:48:15,495 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:48:15,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 02:48:15,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-01 02:48:15,701 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:48:15,702 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:48:15,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1923393446, now seen corresponding path program 1 times [2023-04-01 02:48:15,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:48:15,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209446039] [2023-04-01 02:48:15,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:48:15,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:48:15,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:48:15,990 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:48:15,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:48:15,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209446039] [2023-04-01 02:48:15,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209446039] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:48:15,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302472437] [2023-04-01 02:48:15,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:48:15,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:48:15,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:48:15,993 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:48:15,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 02:48:16,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:48:16,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 22 conjunts are in the unsatisfiable core [2023-04-01 02:48:16,041 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:48:16,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 02:48:16,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 02:48:16,211 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:48:16,211 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:48:16,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-04-01 02:48:16,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-04-01 02:48:16,341 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:48:16,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302472437] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:48:16,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [524827210] [2023-04-01 02:48:16,343 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 02:48:16,343 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:48:16,343 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:48:16,344 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:48:16,344 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:48:16,380 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-01 02:48:16,608 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 50 for LOIs [2023-04-01 02:48:16,633 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 02:48:16,638 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:48:17,262 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '605#(and (<= 1 |#StackHeapBarrier|) (= ~MAX~0 100000) (exists ((v_main_~i~0_BEFORE_CALL_9 Int) (v_main_~a~0.base_BEFORE_CALL_9 Int)) (and (< v_main_~i~0_BEFORE_CALL_9 ~SIZE~0) (<= (+ v_main_~a~0.base_BEFORE_CALL_9 1) |#StackHeapBarrier|) (< (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_9) (* v_main_~i~0_BEFORE_CALL_9 4)) 2) (<= ~SIZE~0 (+ v_main_~i~0_BEFORE_CALL_9 99999)) (<= 1 (+ v_main_~i~0_BEFORE_CALL_9 |#StackHeapBarrier|)) (<= 0 v_main_~i~0_BEFORE_CALL_9) (<= 2 (+ ~SIZE~0 v_main_~i~0_BEFORE_CALL_9)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~SIZE~0 99999) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:48:17,262 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:48:17,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:48:17,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 25 [2023-04-01 02:48:17,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442157916] [2023-04-01 02:48:17,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:48:17,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 02:48:17,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:48:17,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 02:48:17,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1209, Unknown=0, NotChecked=0, Total=1332 [2023-04-01 02:48:17,264 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 25 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 7 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 02:48:19,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:48:19,268 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2023-04-01 02:48:19,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 02:48:19,269 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 7 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 21 [2023-04-01 02:48:19,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:48:19,270 INFO L225 Difference]: With dead ends: 50 [2023-04-01 02:48:19,270 INFO L226 Difference]: Without dead ends: 48 [2023-04-01 02:48:19,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=159, Invalid=1563, Unknown=0, NotChecked=0, Total=1722 [2023-04-01 02:48:19,272 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 24 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 10 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-04-01 02:48:19,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 133 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 179 Invalid, 3 Unknown, 0 Unchecked, 1.9s Time] [2023-04-01 02:48:19,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-04-01 02:48:19,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 32. [2023-04-01 02:48:19,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 02:48:19,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2023-04-01 02:48:19,277 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 21 [2023-04-01 02:48:19,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:48:19,278 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2023-04-01 02:48:19,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 7 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 02:48:19,278 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2023-04-01 02:48:19,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 02:48:19,279 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:48:19,279 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:48:19,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-01 02:48:19,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:48:19,479 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:48:19,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:48:19,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1910038712, now seen corresponding path program 2 times [2023-04-01 02:48:19,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:48:19,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891414745] [2023-04-01 02:48:19,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:48:19,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:48:19,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:48:19,775 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:48:19,776 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:48:19,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891414745] [2023-04-01 02:48:19,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891414745] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:48:19,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062988013] [2023-04-01 02:48:19,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:48:19,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:48:19,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:48:19,777 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:48:19,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 02:48:19,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 02:48:19,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:48:19,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 32 conjunts are in the unsatisfiable core [2023-04-01 02:48:19,837 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:48:19,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 02:48:19,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2023-04-01 02:48:19,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 55 [2023-04-01 02:48:19,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 02:48:19,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2023-04-01 02:48:19,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-04-01 02:48:19,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 02:48:19,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-04-01 02:48:20,276 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:48:20,276 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:48:20,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2023-04-01 02:48:20,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2023-04-01 02:48:20,441 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:48:20,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062988013] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:48:20,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [366383457] [2023-04-01 02:48:20,442 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 02:48:20,442 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:48:20,443 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:48:20,443 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:48:20,451 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:48:20,476 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-01 02:48:20,685 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 50 for LOIs [2023-04-01 02:48:20,708 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 02:48:20,713 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:48:21,345 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '906#(and (<= 1 |#StackHeapBarrier|) (exists ((v_main_~a~0.base_BEFORE_CALL_18 Int) (v_main_~i~0_BEFORE_CALL_18 Int)) (and (<= 1 (+ v_main_~i~0_BEFORE_CALL_18 |#StackHeapBarrier|)) (<= (+ v_main_~a~0.base_BEFORE_CALL_18 1) |#StackHeapBarrier|) (<= ~SIZE~0 (+ v_main_~i~0_BEFORE_CALL_18 99999)) (<= 2 (+ ~SIZE~0 v_main_~i~0_BEFORE_CALL_18)) (<= 0 v_main_~i~0_BEFORE_CALL_18) (< v_main_~i~0_BEFORE_CALL_18 ~SIZE~0) (< (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_18) (* v_main_~i~0_BEFORE_CALL_18 4)) 2))) (= ~MAX~0 100000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~SIZE~0 99999) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:48:21,346 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:48:21,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:48:21,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 28 [2023-04-01 02:48:21,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696193545] [2023-04-01 02:48:21,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:48:21,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-04-01 02:48:21,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:48:21,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-04-01 02:48:21,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1428, Unknown=0, NotChecked=0, Total=1560 [2023-04-01 02:48:21,348 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 28 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 7 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 02:48:23,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:48:23,141 INFO L93 Difference]: Finished difference Result 61 states and 64 transitions. [2023-04-01 02:48:23,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-01 02:48:23,142 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 7 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 22 [2023-04-01 02:48:23,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:48:23,143 INFO L225 Difference]: With dead ends: 61 [2023-04-01 02:48:23,143 INFO L226 Difference]: Without dead ends: 59 [2023-04-01 02:48:23,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=277, Invalid=2585, Unknown=0, NotChecked=0, Total=2862 [2023-04-01 02:48:23,145 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 28 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 39 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 02:48:23,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 244 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 512 Invalid, 1 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 02:48:23,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-04-01 02:48:23,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2023-04-01 02:48:23,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 02:48:23,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2023-04-01 02:48:23,152 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 22 [2023-04-01 02:48:23,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:48:23,153 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2023-04-01 02:48:23,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 7 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 02:48:23,153 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2023-04-01 02:48:23,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 02:48:23,153 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:48:23,153 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:48:23,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 02:48:23,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:48:23,361 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:48:23,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:48:23,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1545524492, now seen corresponding path program 3 times [2023-04-01 02:48:23,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:48:23,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103412822] [2023-04-01 02:48:23,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:48:23,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:48:23,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:48:23,439 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 02:48:23,439 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:48:23,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103412822] [2023-04-01 02:48:23,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103412822] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:48:23,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146927696] [2023-04-01 02:48:23,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 02:48:23,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:48:23,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:48:23,454 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:48:23,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 02:48:23,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 02:48:23,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:48:23,508 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 02:48:23,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:48:23,571 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 02:48:23,572 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:48:23,613 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 02:48:23,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146927696] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:48:23,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [452160017] [2023-04-01 02:48:23,614 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 02:48:23,615 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:48:23,615 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:48:23,615 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:48:23,615 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:48:23,636 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-01 02:48:23,827 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 50 for LOIs [2023-04-01 02:48:23,848 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 02:48:23,853 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:48:24,305 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1261#(and (<= 1 |#StackHeapBarrier|) (= ~MAX~0 100000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~SIZE~0 99999) (= |#NULL.offset| 0) (exists ((v_main_~a~0.base_BEFORE_CALL_25 Int) (v_main_~i~0_BEFORE_CALL_29 Int)) (and (<= 0 v_main_~i~0_BEFORE_CALL_29) (<= 1 (+ v_main_~i~0_BEFORE_CALL_29 |#StackHeapBarrier|)) (<= 2 (+ ~SIZE~0 v_main_~i~0_BEFORE_CALL_29)) (< (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_25) (* v_main_~i~0_BEFORE_CALL_29 4)) 2) (<= (+ v_main_~a~0.base_BEFORE_CALL_25 1) |#StackHeapBarrier|) (<= ~SIZE~0 (+ v_main_~i~0_BEFORE_CALL_29 99999)) (< v_main_~i~0_BEFORE_CALL_29 ~SIZE~0))) (= |#NULL.base| 0))' at error location [2023-04-01 02:48:24,305 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:48:24,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:48:24,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 14 [2023-04-01 02:48:24,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412036556] [2023-04-01 02:48:24,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:48:24,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 02:48:24,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:48:24,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 02:48:24,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2023-04-01 02:48:24,308 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 7 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 02:48:24,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:48:24,387 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2023-04-01 02:48:24,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 02:48:24,388 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), 7 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 28 [2023-04-01 02:48:24,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:48:24,388 INFO L225 Difference]: With dead ends: 60 [2023-04-01 02:48:24,388 INFO L226 Difference]: Without dead ends: 36 [2023-04-01 02:48:24,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 63 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2023-04-01 02:48:24,389 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:48:24,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 58 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:48:24,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-04-01 02:48:24,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2023-04-01 02:48:24,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 23 states have internal predecessors, (24), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 02:48:24,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2023-04-01 02:48:24,396 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 28 [2023-04-01 02:48:24,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:48:24,396 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2023-04-01 02:48:24,396 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), 7 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 02:48:24,396 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2023-04-01 02:48:24,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 02:48:24,397 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:48:24,397 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:48:24,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 02:48:24,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:48:24,601 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:48:24,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:48:24,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1517893906, now seen corresponding path program 4 times [2023-04-01 02:48:24,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:48:24,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454038378] [2023-04-01 02:48:24,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:48:24,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:48:24,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:48:24,866 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 02:48:24,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:48:24,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454038378] [2023-04-01 02:48:24,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454038378] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:48:24,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495895376] [2023-04-01 02:48:24,867 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 02:48:24,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:48:24,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:48:24,868 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:48:24,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 02:48:24,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:48:24,927 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 26 conjunts are in the unsatisfiable core [2023-04-01 02:48:24,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:48:24,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 02:48:25,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 02:48:25,257 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 02:48:25,257 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:48:25,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-04-01 02:48:25,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-04-01 02:48:25,439 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 02:48:25,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495895376] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:48:25,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2123140452] [2023-04-01 02:48:25,441 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 02:48:25,441 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:48:25,441 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:48:25,441 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:48:25,441 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:48:25,460 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-01 02:48:25,653 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 50 for LOIs [2023-04-01 02:48:25,674 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 02:48:25,679 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:48:26,378 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1617#(and (<= 1 |#StackHeapBarrier|) (= ~MAX~0 100000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((v_main_~i~0_BEFORE_CALL_40 Int) (v_main_~a~0.base_BEFORE_CALL_36 Int)) (and (<= (+ v_main_~a~0.base_BEFORE_CALL_36 1) |#StackHeapBarrier|) (<= 2 (+ ~SIZE~0 v_main_~i~0_BEFORE_CALL_40)) (<= 0 v_main_~i~0_BEFORE_CALL_40) (<= 1 (+ v_main_~i~0_BEFORE_CALL_40 |#StackHeapBarrier|)) (< v_main_~i~0_BEFORE_CALL_40 ~SIZE~0) (< (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_36) (* v_main_~i~0_BEFORE_CALL_40 4)) 2) (<= ~SIZE~0 (+ v_main_~i~0_BEFORE_CALL_40 99999)))) (<= ~SIZE~0 99999) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:48:26,378 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:48:26,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:48:26,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 31 [2023-04-01 02:48:26,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591580278] [2023-04-01 02:48:26,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:48:26,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-04-01 02:48:26,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:48:26,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-04-01 02:48:26,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1677, Unknown=0, NotChecked=0, Total=1806 [2023-04-01 02:48:26,382 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 31 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 29 states have internal predecessors, (43), 10 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 02:48:29,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:48:29,369 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2023-04-01 02:48:29,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 02:48:29,370 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 29 states have internal predecessors, (43), 10 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 29 [2023-04-01 02:48:29,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:48:29,371 INFO L225 Difference]: With dead ends: 65 [2023-04-01 02:48:29,371 INFO L226 Difference]: Without dead ends: 63 [2023-04-01 02:48:29,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=212, Invalid=2650, Unknown=0, NotChecked=0, Total=2862 [2023-04-01 02:48:29,373 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 30 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 18 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-04-01 02:48:29,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 248 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 393 Invalid, 4 Unknown, 0 Unchecked, 2.7s Time] [2023-04-01 02:48:29,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-04-01 02:48:29,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 40. [2023-04-01 02:48:29,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 02:48:29,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2023-04-01 02:48:29,379 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 29 [2023-04-01 02:48:29,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:48:29,379 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2023-04-01 02:48:29,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 29 states have internal predecessors, (43), 10 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 02:48:29,380 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2023-04-01 02:48:29,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 02:48:29,380 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:48:29,380 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:48:29,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 02:48:29,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:48:29,587 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:48:29,587 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:48:29,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1994583732, now seen corresponding path program 5 times [2023-04-01 02:48:29,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:48:29,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325325162] [2023-04-01 02:48:29,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:48:29,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:48:29,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:48:29,880 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 02:48:29,880 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:48:29,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325325162] [2023-04-01 02:48:29,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325325162] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:48:29,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338749253] [2023-04-01 02:48:29,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:48:29,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:48:29,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:48:29,885 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 02:48:29,887 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 02:48:29,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 02:48:29,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:48:29,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 32 conjunts are in the unsatisfiable core [2023-04-01 02:48:29,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:48:30,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 02:48:30,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2023-04-01 02:48:30,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 48 [2023-04-01 02:48:30,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 02:48:30,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2023-04-01 02:48:30,083 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 8 treesize of output 1 [2023-04-01 02:48:30,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 02:48:30,341 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 02:48:30,341 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:48:30,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2023-04-01 02:48:30,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 110 [2023-04-01 02:48:30,596 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 02:48:30,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338749253] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:48:30,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [542369439] [2023-04-01 02:48:30,598 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 02:48:30,598 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:48:30,598 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:48:30,598 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:48:30,598 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:48:30,625 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-01 02:48:30,812 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 50 for LOIs [2023-04-01 02:48:30,831 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 02:48:30,835 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:48:31,500 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2018#(and (<= 1 |#StackHeapBarrier|) (= ~MAX~0 100000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~SIZE~0 99999) (= |#NULL.offset| 0) (= |#NULL.base| 0) (exists ((v_main_~i~0_BEFORE_CALL_51 Int) (v_main_~a~0.base_BEFORE_CALL_47 Int)) (and (< v_main_~i~0_BEFORE_CALL_51 ~SIZE~0) (<= 1 (+ v_main_~i~0_BEFORE_CALL_51 |#StackHeapBarrier|)) (< (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_47) (* v_main_~i~0_BEFORE_CALL_51 4)) 2) (<= ~SIZE~0 (+ v_main_~i~0_BEFORE_CALL_51 99999)) (<= 0 v_main_~i~0_BEFORE_CALL_51) (<= (+ v_main_~a~0.base_BEFORE_CALL_47 1) |#StackHeapBarrier|) (<= 2 (+ ~SIZE~0 v_main_~i~0_BEFORE_CALL_51)))))' at error location [2023-04-01 02:48:31,501 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:48:31,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:48:31,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 34 [2023-04-01 02:48:31,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741604240] [2023-04-01 02:48:31,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:48:31,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-04-01 02:48:31,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:48:31,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-04-01 02:48:31,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1920, Unknown=0, NotChecked=0, Total=2070 [2023-04-01 02:48:31,503 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 34 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 32 states have internal predecessors, (46), 10 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 02:48:33,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 02:48:35,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 02:48:35,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:48:35,869 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2023-04-01 02:48:35,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 02:48:35,870 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 32 states have internal predecessors, (46), 10 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 30 [2023-04-01 02:48:35,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:48:35,871 INFO L225 Difference]: With dead ends: 59 [2023-04-01 02:48:35,871 INFO L226 Difference]: Without dead ends: 57 [2023-04-01 02:48:35,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=238, Invalid=2954, Unknown=0, NotChecked=0, Total=3192 [2023-04-01 02:48:35,872 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 20 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 28 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:48:35,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 223 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 505 Invalid, 2 Unknown, 0 Unchecked, 4.1s Time] [2023-04-01 02:48:35,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-04-01 02:48:35,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2023-04-01 02:48:35,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 34 states have (on average 1.088235294117647) internal successors, (37), 36 states have internal predecessors, (37), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 02:48:35,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2023-04-01 02:48:35,881 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 30 [2023-04-01 02:48:35,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:48:35,881 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2023-04-01 02:48:35,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 32 states have internal predecessors, (46), 10 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 02:48:35,881 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2023-04-01 02:48:35,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-01 02:48:35,882 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:48:35,882 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:48:35,896 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 02:48:36,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:48:36,090 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:48:36,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:48:36,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1660315656, now seen corresponding path program 6 times [2023-04-01 02:48:36,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:48:36,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91291532] [2023-04-01 02:48:36,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:48:36,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:48:36,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:48:36,167 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 02:48:36,167 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:48:36,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91291532] [2023-04-01 02:48:36,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91291532] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:48:36,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33332649] [2023-04-01 02:48:36,168 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 02:48:36,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:48:36,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:48:36,169 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 02:48:36,171 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 02:48:36,230 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 02:48:36,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:48:36,231 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 02:48:36,232 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:48:36,317 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 02:48:36,317 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:48:36,369 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 02:48:36,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33332649] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:48:36,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1833095811] [2023-04-01 02:48:36,372 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 02:48:36,372 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:48:36,372 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:48:36,372 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:48:36,372 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:48:36,397 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-01 02:48:36,571 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 50 for LOIs [2023-04-01 02:48:36,591 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 02:48:36,596 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:48:37,074 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2445#(and (<= 1 |#StackHeapBarrier|) (= ~MAX~0 100000) (exists ((v_main_~a~0.base_BEFORE_CALL_54 Int) (v_main_~i~0_BEFORE_CALL_64 Int)) (and (< (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_54) (* v_main_~i~0_BEFORE_CALL_64 4)) 2) (<= 0 v_main_~i~0_BEFORE_CALL_64) (<= ~SIZE~0 (+ v_main_~i~0_BEFORE_CALL_64 99999)) (<= 2 (+ ~SIZE~0 v_main_~i~0_BEFORE_CALL_64)) (<= 1 (+ v_main_~i~0_BEFORE_CALL_64 |#StackHeapBarrier|)) (< v_main_~i~0_BEFORE_CALL_64 ~SIZE~0) (<= (+ v_main_~a~0.base_BEFORE_CALL_54 1) |#StackHeapBarrier|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~SIZE~0 99999) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:48:37,074 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:48:37,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:48:37,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 17 [2023-04-01 02:48:37,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205759858] [2023-04-01 02:48:37,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:48:37,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 02:48:37,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:48:37,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 02:48:37,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2023-04-01 02:48:37,076 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 9 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 02:48:37,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:48:37,201 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2023-04-01 02:48:37,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 02:48:37,201 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 9 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 36 [2023-04-01 02:48:37,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:48:37,202 INFO L225 Difference]: With dead ends: 75 [2023-04-01 02:48:37,202 INFO L226 Difference]: Without dead ends: 44 [2023-04-01 02:48:37,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 84 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=145, Invalid=847, Unknown=0, NotChecked=0, Total=992 [2023-04-01 02:48:37,203 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 10 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:48:37,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 82 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:48:37,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-04-01 02:48:37,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2023-04-01 02:48:37,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 29 states have internal predecessors, (30), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 02:48:37,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2023-04-01 02:48:37,211 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 36 [2023-04-01 02:48:37,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:48:37,211 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2023-04-01 02:48:37,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 9 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 02:48:37,212 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2023-04-01 02:48:37,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-04-01 02:48:37,212 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:48:37,212 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:48:37,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 02:48:37,418 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,SelfDestructingSolverStorable8 [2023-04-01 02:48:37,418 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:48:37,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:48:37,419 INFO L85 PathProgramCache]: Analyzing trace with hash 530937894, now seen corresponding path program 7 times [2023-04-01 02:48:37,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:48:37,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272427342] [2023-04-01 02:48:37,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:48:37,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:48:37,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:48:37,808 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 02:48:37,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:48:37,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272427342] [2023-04-01 02:48:37,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272427342] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:48:37,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996606667] [2023-04-01 02:48:37,808 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 02:48:37,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:48:37,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:48:37,809 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 02:48:37,810 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 02:48:37,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:48:37,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 30 conjunts are in the unsatisfiable core [2023-04-01 02:48:37,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:48:37,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 02:48:38,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 02:48:38,247 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 02:48:38,247 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:48:38,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-04-01 02:48:38,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-04-01 02:48:38,489 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 02:48:38,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996606667] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:48:38,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1892051072] [2023-04-01 02:48:38,490 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 02:48:38,490 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:48:38,490 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:48:38,490 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:48:38,490 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:48:38,512 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-01 02:48:38,689 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 50 for LOIs [2023-04-01 02:48:38,706 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 02:48:38,710 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:48:39,351 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2891#(and (<= 1 |#StackHeapBarrier|) (= ~MAX~0 100000) (exists ((v_main_~a~0.base_BEFORE_CALL_67 Int) (v_main_~i~0_BEFORE_CALL_77 Int)) (and (<= 1 (+ v_main_~i~0_BEFORE_CALL_77 |#StackHeapBarrier|)) (<= ~SIZE~0 (+ v_main_~i~0_BEFORE_CALL_77 99999)) (< v_main_~i~0_BEFORE_CALL_77 ~SIZE~0) (< (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_67) (* v_main_~i~0_BEFORE_CALL_77 4)) 2) (<= 0 v_main_~i~0_BEFORE_CALL_77) (<= 2 (+ ~SIZE~0 v_main_~i~0_BEFORE_CALL_77)) (<= (+ v_main_~a~0.base_BEFORE_CALL_67 1) |#StackHeapBarrier|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~SIZE~0 99999) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:48:39,351 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:48:39,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:48:39,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 37 [2023-04-01 02:48:39,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921569017] [2023-04-01 02:48:39,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:48:39,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-04-01 02:48:39,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:48:39,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-04-01 02:48:39,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=2180, Unknown=0, NotChecked=0, Total=2352 [2023-04-01 02:48:39,353 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 37 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 35 states have internal predecessors, (52), 13 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 02:48:43,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 02:48:44,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:48:44,172 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2023-04-01 02:48:44,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-01 02:48:44,172 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 35 states have internal predecessors, (52), 13 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 37 [2023-04-01 02:48:44,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:48:44,173 INFO L225 Difference]: With dead ends: 80 [2023-04-01 02:48:44,173 INFO L226 Difference]: Without dead ends: 78 [2023-04-01 02:48:44,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 72 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=202, Invalid=2554, Unknown=0, NotChecked=0, Total=2756 [2023-04-01 02:48:44,174 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 18 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 9 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-04-01 02:48:44,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 257 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 495 Invalid, 5 Unknown, 0 Unchecked, 4.7s Time] [2023-04-01 02:48:44,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-04-01 02:48:44,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 48. [2023-04-01 02:48:44,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 34 states have (on average 1.088235294117647) internal successors, (37), 35 states have internal predecessors, (37), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 02:48:44,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2023-04-01 02:48:44,184 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 37 [2023-04-01 02:48:44,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:48:44,184 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2023-04-01 02:48:44,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 35 states have internal predecessors, (52), 13 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 02:48:44,184 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2023-04-01 02:48:44,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-01 02:48:44,184 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:48:44,184 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:48:44,189 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 02:48:44,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 02:48:44,390 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:48:44,390 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:48:44,390 INFO L85 PathProgramCache]: Analyzing trace with hash -120034360, now seen corresponding path program 8 times [2023-04-01 02:48:44,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:48:44,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278490173] [2023-04-01 02:48:44,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:48:44,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:48:44,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:48:44,823 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 02:48:44,824 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:48:44,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278490173] [2023-04-01 02:48:44,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278490173] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:48:44,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814633250] [2023-04-01 02:48:44,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:48:44,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:48:44,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:48:44,833 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 02:48:44,851 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 02:48:44,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-01 02:48:44,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:48:44,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 41 conjunts are in the unsatisfiable core [2023-04-01 02:48:44,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:48:45,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 02:48:45,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-04-01 02:48:45,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 47 [2023-04-01 02:48:45,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 18 [2023-04-01 02:48:45,110 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 8 treesize of output 1 [2023-04-01 02:48:45,554 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 02:48:45,554 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:48:45,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-04-01 02:48:45,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2023-04-01 02:48:45,899 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 02:48:45,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814633250] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:48:45,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1901626516] [2023-04-01 02:48:45,900 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 02:48:45,900 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:48:45,900 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:48:45,900 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:48:45,900 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:48:45,922 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-01 02:48:46,107 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 50 for LOIs [2023-04-01 02:48:46,129 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 02:48:46,133 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:48:46,878 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3366#(and (<= 1 |#StackHeapBarrier|) (exists ((v_main_~a~0.base_BEFORE_CALL_80 Int) (v_main_~i~0_BEFORE_CALL_90 Int)) (and (< v_main_~i~0_BEFORE_CALL_90 ~SIZE~0) (<= 1 (+ v_main_~i~0_BEFORE_CALL_90 |#StackHeapBarrier|)) (<= (+ v_main_~a~0.base_BEFORE_CALL_80 1) |#StackHeapBarrier|) (<= 0 v_main_~i~0_BEFORE_CALL_90) (<= ~SIZE~0 (+ v_main_~i~0_BEFORE_CALL_90 99999)) (<= 2 (+ ~SIZE~0 v_main_~i~0_BEFORE_CALL_90)) (< (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_80) (* v_main_~i~0_BEFORE_CALL_90 4)) 2))) (= ~MAX~0 100000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~SIZE~0 99999) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:48:46,878 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:48:46,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:48:46,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 15] total 40 [2023-04-01 02:48:46,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116795323] [2023-04-01 02:48:46,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:48:46,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-04-01 02:48:46,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:48:46,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-04-01 02:48:46,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=2460, Unknown=0, NotChecked=0, Total=2652 [2023-04-01 02:48:46,880 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 40 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 38 states have internal predecessors, (55), 13 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 02:48:48,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:48:48,143 INFO L93 Difference]: Finished difference Result 133 states and 148 transitions. [2023-04-01 02:48:48,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-04-01 02:48:48,144 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 38 states have internal predecessors, (55), 13 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 38 [2023-04-01 02:48:48,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:48:48,145 INFO L225 Difference]: With dead ends: 133 [2023-04-01 02:48:48,145 INFO L226 Difference]: Without dead ends: 131 [2023-04-01 02:48:48,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 74 SyntacticMatches, 5 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1293 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=427, Invalid=4975, Unknown=0, NotChecked=0, Total=5402 [2023-04-01 02:48:48,147 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 52 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 1149 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 1214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 02:48:48,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 365 Invalid, 1214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1149 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 02:48:48,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-04-01 02:48:48,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 100. [2023-04-01 02:48:48,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 70 states have (on average 1.0714285714285714) internal successors, (75), 74 states have internal predecessors, (75), 18 states have call successors, (18), 12 states have call predecessors, (18), 11 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2023-04-01 02:48:48,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2023-04-01 02:48:48,179 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 38 [2023-04-01 02:48:48,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:48:48,180 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2023-04-01 02:48:48,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 38 states have internal predecessors, (55), 13 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 02:48:48,180 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2023-04-01 02:48:48,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-04-01 02:48:48,181 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:48:48,181 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:48:48,186 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 02:48:48,385 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,SelfDestructingSolverStorable10 [2023-04-01 02:48:48,386 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:48:48,386 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:48:48,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1639415928, now seen corresponding path program 9 times [2023-04-01 02:48:48,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:48:48,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971455259] [2023-04-01 02:48:48,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:48:48,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:48:48,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:48:49,058 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 43 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 02:48:49,058 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:48:49,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971455259] [2023-04-01 02:48:49,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971455259] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:48:49,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012094899] [2023-04-01 02:48:49,058 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 02:48:49,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:48:49,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:48:49,069 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 02:48:49,071 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 02:48:49,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 02:48:49,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:48:49,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 50 conjunts are in the unsatisfiable core [2023-04-01 02:48:49,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:48:49,291 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 02:48:49,360 INFO L321 Elim1Store]: treesize reduction 56, result has 25.3 percent of original size [2023-04-01 02:48:49,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 83 [2023-04-01 02:48:49,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 13 [2023-04-01 02:48:49,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-04-01 02:48:49,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-04-01 02:48:49,482 INFO L321 Elim1Store]: treesize reduction 56, result has 25.3 percent of original size [2023-04-01 02:48:49,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 83 [2023-04-01 02:48:49,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 13 [2023-04-01 02:48:49,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-04-01 02:48:49,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-04-01 02:48:49,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 16 [2023-04-01 02:48:49,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 52 [2023-04-01 02:48:49,601 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-04-01 02:48:49,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2023-04-01 02:48:49,611 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 8 treesize of output 1 [2023-04-01 02:48:49,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-04-01 02:48:56,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-04-01 02:48:56,111 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 49 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 02:48:56,111 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:49:08,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 53 [2023-04-01 02:49:08,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61686 treesize of output 61430 [2023-04-01 02:49:09,048 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 43 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 02:49:09,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012094899] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:49:09,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2141344454] [2023-04-01 02:49:09,049 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 02:49:09,049 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:49:09,050 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:49:09,050 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:49:09,050 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:49:09,082 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-01 02:49:09,246 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 50 for LOIs [2023-04-01 02:49:09,270 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 02:49:09,276 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:49:10,738 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4063#(and (<= 1 |#StackHeapBarrier|) (= ~MAX~0 100000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~SIZE~0 99999) (= |#NULL.offset| 0) (exists ((v_main_~a~0.base_BEFORE_CALL_93 Int) (v_main_~i~0_BEFORE_CALL_103 Int)) (and (<= (+ v_main_~a~0.base_BEFORE_CALL_93 1) |#StackHeapBarrier|) (< v_main_~i~0_BEFORE_CALL_103 ~SIZE~0) (< (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_93) (* v_main_~i~0_BEFORE_CALL_103 4)) 2) (<= 1 (+ v_main_~i~0_BEFORE_CALL_103 |#StackHeapBarrier|)) (<= ~SIZE~0 (+ 99999 v_main_~i~0_BEFORE_CALL_103)) (<= 0 v_main_~i~0_BEFORE_CALL_103) (<= 2 (+ ~SIZE~0 v_main_~i~0_BEFORE_CALL_103)))) (= |#NULL.base| 0))' at error location [2023-04-01 02:49:10,738 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:49:10,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:49:10,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20, 17] total 48 [2023-04-01 02:49:10,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544065931] [2023-04-01 02:49:10,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:49:10,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-04-01 02:49:10,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:49:10,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-04-01 02:49:10,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=3307, Unknown=7, NotChecked=0, Total=3540 [2023-04-01 02:49:10,740 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand has 48 states, 45 states have (on average 1.4222222222222223) internal successors, (64), 46 states have internal predecessors, (64), 13 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 02:49:12,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-04-01 02:49:14,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 02:49:16,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]