/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/tcpy.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 02:48:44,508 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 02:48:44,510 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 02:48:44,533 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 02:48:44,533 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 02:48:44,534 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 02:48:44,535 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 02:48:44,537 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 02:48:44,538 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 02:48:44,539 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 02:48:44,539 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 02:48:44,540 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 02:48:44,541 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 02:48:44,541 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 02:48:44,542 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 02:48:44,543 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 02:48:44,544 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 02:48:44,544 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 02:48:44,546 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 02:48:44,547 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 02:48:44,548 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 02:48:44,549 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 02:48:44,550 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 02:48:44,550 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 02:48:44,553 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 02:48:44,553 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 02:48:44,554 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 02:48:44,554 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 02:48:44,555 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 02:48:44,555 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 02:48:44,556 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 02:48:44,556 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 02:48:44,557 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 02:48:44,557 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 02:48:44,558 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 02:48:44,558 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 02:48:44,559 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 02:48:44,559 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 02:48:44,559 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 02:48:44,560 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 02:48:44,560 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 02:48:44,561 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 02:48:44,580 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 02:48:44,581 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 02:48:44,581 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 02:48:44,581 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 02:48:44,582 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 02:48:44,582 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 02:48:44,582 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 02:48:44,583 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 02:48:44,583 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 02:48:44,583 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 02:48:44,583 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 02:48:44,583 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 02:48:44,584 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 02:48:44,584 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 02:48:44,584 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 02:48:44,584 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 02:48:44,584 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 02:48:44,585 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 02:48:44,585 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 02:48:44,586 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 02:48:44,586 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 02:48:44,586 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 02:48:44,586 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 02:48:44,586 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 02:48:44,586 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 02:48:44,587 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 02:48:44,587 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 02:48:44,587 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 02:48:44,587 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 02:48:44,588 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 02:48:44,588 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 02:48:44,588 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 02:48:44,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 02:48:44,588 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 02:48:44,589 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 02:48:44,589 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 02:48:44,589 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 02:48:44,589 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 02:48:44,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 02:48:44,590 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 02:48:44,590 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 02:48:44,590 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 02:48:44,791 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 02:48:44,821 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 02:48:44,824 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 02:48:44,825 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 02:48:44,826 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 02:48:44,827 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/tcpy.c [2023-04-01 02:48:46,062 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 02:48:46,228 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 02:48:46,228 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/tcpy.c [2023-04-01 02:48:46,233 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5427bebf/783b64517fa1403c99065e2b330d8b1b/FLAGb67762529 [2023-04-01 02:48:46,244 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5427bebf/783b64517fa1403c99065e2b330d8b1b [2023-04-01 02:48:46,246 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 02:48:46,247 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 02:48:46,248 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 02:48:46,248 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 02:48:46,251 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 02:48:46,252 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 02:48:46" (1/1) ... [2023-04-01 02:48:46,253 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@409d7a33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:48:46, skipping insertion in model container [2023-04-01 02:48:46,253 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 02:48:46" (1/1) ... [2023-04-01 02:48:46,259 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 02:48:46,270 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 02:48:46,409 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/tcpy.c[395,408] [2023-04-01 02:48:46,437 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 02:48:46,445 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 02:48:46,454 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/tcpy.c[395,408] [2023-04-01 02:48:46,460 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 02:48:46,470 INFO L208 MainTranslator]: Completed translation [2023-04-01 02:48:46,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:48:46 WrapperNode [2023-04-01 02:48:46,470 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 02:48:46,471 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 02:48:46,471 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 02:48:46,472 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 02:48:46,481 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:48:46" (1/1) ... [2023-04-01 02:48:46,482 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:48:46" (1/1) ... [2023-04-01 02:48:46,488 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:48:46" (1/1) ... [2023-04-01 02:48:46,488 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:48:46" (1/1) ... [2023-04-01 02:48:46,494 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:48:46" (1/1) ... [2023-04-01 02:48:46,505 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:48:46" (1/1) ... [2023-04-01 02:48:46,506 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:48:46" (1/1) ... [2023-04-01 02:48:46,507 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:48:46" (1/1) ... [2023-04-01 02:48:46,509 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 02:48:46,510 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 02:48:46,510 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 02:48:46,510 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 02:48:46,510 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:48:46" (1/1) ... [2023-04-01 02:48:46,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 02:48:46,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:48:46,537 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 02:48:46,539 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 02:48:46,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 02:48:46,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 02:48:46,570 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 02:48:46,572 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 02:48:46,572 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 02:48:46,572 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 02:48:46,573 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 02:48:46,573 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 02:48:46,573 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 02:48:46,573 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 02:48:46,573 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 02:48:46,573 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 02:48:46,573 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 02:48:46,574 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 02:48:46,574 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 02:48:46,574 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 02:48:46,574 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 02:48:46,574 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 02:48:46,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 02:48:46,574 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 02:48:46,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 02:48:46,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 02:48:46,631 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 02:48:46,633 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 02:48:46,815 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 02:48:46,885 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 02:48:46,886 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 02:48:46,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 02:48:46 BoogieIcfgContainer [2023-04-01 02:48:46,894 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 02:48:46,896 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 02:48:46,896 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 02:48:46,902 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 02:48:46,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 02:48:46" (1/3) ... [2023-04-01 02:48:46,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@872ee3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 02:48:46, skipping insertion in model container [2023-04-01 02:48:46,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:48:46" (2/3) ... [2023-04-01 02:48:46,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@872ee3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 02:48:46, skipping insertion in model container [2023-04-01 02:48:46,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 02:48:46" (3/3) ... [2023-04-01 02:48:46,906 INFO L112 eAbstractionObserver]: Analyzing ICFG tcpy.c [2023-04-01 02:48:46,925 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 02:48:46,926 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 02:48:46,993 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 02:48:47,001 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;@185bff8f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 02:48:47,002 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 02:48:47,007 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 02:48:47,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 02:48:47,015 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:48:47,016 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:48:47,017 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:48:47,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:48:47,022 INFO L85 PathProgramCache]: Analyzing trace with hash 324653832, now seen corresponding path program 1 times [2023-04-01 02:48:47,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:48:47,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812332575] [2023-04-01 02:48:47,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:48:47,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:48:47,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:48:47,392 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 02:48:47,393 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:48:47,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812332575] [2023-04-01 02:48:47,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812332575] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:48:47,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 02:48:47,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 02:48:47,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925670122] [2023-04-01 02:48:47,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:48:47,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 02:48:47,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:48:47,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 02:48:47,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 02:48:47,440 INFO L87 Difference]: Start difference. First operand has 27 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:48:47,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:48:47,492 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2023-04-01 02:48:47,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 02:48:47,494 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-04-01 02:48:47,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:48:47,499 INFO L225 Difference]: With dead ends: 48 [2023-04-01 02:48:47,500 INFO L226 Difference]: Without dead ends: 23 [2023-04-01 02:48:47,502 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 02:48:47,505 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:48:47,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:48:47,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-04-01 02:48:47,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-04-01 02:48:47,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 02:48:47,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2023-04-01 02:48:47,537 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 18 [2023-04-01 02:48:47,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:48:47,538 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2023-04-01 02:48:47,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:48:47,552 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2023-04-01 02:48:47,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-01 02:48:47,553 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:48:47,554 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:48:47,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 02:48:47,554 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:48:47,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:48:47,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1175256748, now seen corresponding path program 1 times [2023-04-01 02:48:47,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:48:47,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810198115] [2023-04-01 02:48:47,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:48:47,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:48:47,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:48:47,762 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 02:48:47,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:48:47,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810198115] [2023-04-01 02:48:47,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810198115] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:48:47,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790608158] [2023-04-01 02:48:47,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:48:47,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:48:47,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:48:47,771 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 02:48:47,788 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 02:48:47,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:48:47,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 02:48:47,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:48:47,898 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 02:48:47,898 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:48:47,953 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 02:48:47,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790608158] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:48:47,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [173377832] [2023-04-01 02:48:47,971 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 02:48:47,972 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:48:47,975 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:48:47,979 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:48:47,980 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:48:48,132 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-01 02:48:48,448 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 27 for LOIs [2023-04-01 02:48:48,459 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 02:48:48,474 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:48:48,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [173377832] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:48:48,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:48:48,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [4, 4, 4] total 18 [2023-04-01 02:48:48,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612641413] [2023-04-01 02:48:48,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:48:48,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 02:48:48,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:48:48,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 02:48:48,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2023-04-01 02:48:48,973 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 13 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:48:49,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:48:49,410 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2023-04-01 02:48:49,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 02:48:49,410 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2023-04-01 02:48:49,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:48:49,413 INFO L225 Difference]: With dead ends: 36 [2023-04-01 02:48:49,413 INFO L226 Difference]: Without dead ends: 27 [2023-04-01 02:48:49,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2023-04-01 02:48:49,418 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 10 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 02:48:49,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 14 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 02:48:49,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-04-01 02:48:49,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2023-04-01 02:48:49,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 02:48:49,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2023-04-01 02:48:49,438 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2023-04-01 02:48:49,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:48:49,439 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2023-04-01 02:48:49,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:48:49,440 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2023-04-01 02:48:49,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 02:48:49,440 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:48:49,440 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:48:49,449 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 02:48:49,646 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 02:48:49,647 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:48:49,647 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:48:49,648 INFO L85 PathProgramCache]: Analyzing trace with hash 556854878, now seen corresponding path program 1 times [2023-04-01 02:48:49,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:48:49,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64677223] [2023-04-01 02:48:49,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:48:49,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:48:49,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:48:49,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 02:48:49,722 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:48:49,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64677223] [2023-04-01 02:48:49,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64677223] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:48:49,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802255641] [2023-04-01 02:48:49,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:48:49,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:48:49,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:48:49,729 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 02:48:49,730 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 02:48:49,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:48:49,798 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 02:48:49,800 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:48:49,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 02:48:49,826 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:48:49,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 02:48:49,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802255641] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:48:49,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [421372004] [2023-04-01 02:48:49,851 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 02:48:49,852 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:48:49,852 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:48:49,852 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:48:49,852 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:48:49,909 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-01 02:48:50,177 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2023-04-01 02:48:50,199 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 27 for LOIs [2023-04-01 02:48:50,203 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 02:48:50,213 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:48:50,852 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '484#(and (<= 1 |#StackHeapBarrier|) (= ~MAX~0 100000) (<= 2 ~SIZE~0) (exists ((v_main_~acopy~0.base_BEFORE_CALL_6 Int) (v_main_~a~0.base_BEFORE_CALL_6 Int)) (and (<= (+ v_main_~a~0.base_BEFORE_CALL_6 1) |#StackHeapBarrier|) (<= (+ v_main_~acopy~0.base_BEFORE_CALL_6 1) |#StackHeapBarrier|) (not (= (select (select |#memory_int| v_main_~acopy~0.base_BEFORE_CALL_6) 0) (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_6) 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 02:48:50,853 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:48:50,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:48:50,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-01 02:48:50,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929412153] [2023-04-01 02:48:50,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:48:50,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 02:48:50,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:48:50,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 02:48:50,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2023-04-01 02:48:50,855 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 02:48:50,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:48:50,901 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2023-04-01 02:48:50,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 02:48:50,901 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 20 [2023-04-01 02:48:50,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:48:50,902 INFO L225 Difference]: With dead ends: 41 [2023-04-01 02:48:50,902 INFO L226 Difference]: Without dead ends: 25 [2023-04-01 02:48:50,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2023-04-01 02:48:50,903 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:48:50,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 57 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:48:50,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-04-01 02:48:50,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-04-01 02:48:50,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 02:48:50,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2023-04-01 02:48:50,911 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2023-04-01 02:48:50,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:48:50,911 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2023-04-01 02:48:50,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 02:48:50,911 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2023-04-01 02:48:50,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 02:48:50,912 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:48:50,912 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:48:50,920 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 02:48:51,113 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 02:48:51,113 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:48:51,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:48:51,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1942470914, now seen corresponding path program 2 times [2023-04-01 02:48:51,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:48:51,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534723531] [2023-04-01 02:48:51,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:48:51,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:48:51,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:48:51,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 02:48:51,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:48:51,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534723531] [2023-04-01 02:48:51,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534723531] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:48:51,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011571549] [2023-04-01 02:48:51,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:48:51,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:48:51,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:48:51,653 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 02:48:51,686 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 02:48:51,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 02:48:51,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:48:51,735 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 33 conjunts are in the unsatisfiable core [2023-04-01 02:48:51,739 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:48:51,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-04-01 02:48:51,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 02:48:51,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 02:48:51,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 29 [2023-04-01 02:48:51,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 26 treesize of output 10 [2023-04-01 02:48:52,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 02:48:52,005 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:48:52,055 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:48:52,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 420 treesize of output 396 [2023-04-01 02:48:52,078 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 251 treesize of output 215 [2023-04-01 02:48:52,139 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-04-01 02:48:52,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2023-04-01 02:48:52,174 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:48:52,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 340 treesize of output 330 [2023-04-01 02:48:52,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 02:48:52,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011571549] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:48:52,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [825546532] [2023-04-01 02:48:52,811 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 02:48:52,811 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:48:52,811 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:48:52,812 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:48:52,812 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:48:52,852 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-01 02:48:53,037 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2023-04-01 02:48:53,068 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 27 for LOIs [2023-04-01 02:48:53,073 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 02:48:53,086 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:48:53,923 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '745#(and (<= 1 |#StackHeapBarrier|) (= ~MAX~0 100000) (<= 2 ~SIZE~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~SIZE~0 99999) (exists ((v_main_~acopy~0.base_BEFORE_CALL_12 Int) (v_main_~a~0.base_BEFORE_CALL_12 Int)) (and (<= (+ v_main_~a~0.base_BEFORE_CALL_12 1) |#StackHeapBarrier|) (<= (+ v_main_~acopy~0.base_BEFORE_CALL_12 1) |#StackHeapBarrier|) (not (= (select (select |#memory_int| v_main_~acopy~0.base_BEFORE_CALL_12) 0) (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_12) 0))))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:48:53,923 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:48:53,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:48:53,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 11] total 22 [2023-04-01 02:48:53,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882290240] [2023-04-01 02:48:53,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:48:53,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-04-01 02:48:53,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:48:53,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-04-01 02:48:53,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1181, Unknown=0, NotChecked=0, Total=1332 [2023-04-01 02:48:53,926 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 22 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 02:48:54,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:48:54,181 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2023-04-01 02:48:54,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 02:48:54,182 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 21 [2023-04-01 02:48:54,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:48:54,183 INFO L225 Difference]: With dead ends: 34 [2023-04-01 02:48:54,183 INFO L226 Difference]: Without dead ends: 32 [2023-04-01 02:48:54,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=230, Invalid=1662, Unknown=0, NotChecked=0, Total=1892 [2023-04-01 02:48:54,185 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 35 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:48:54,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 105 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:48:54,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-04-01 02:48:54,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2023-04-01 02:48:54,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 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 02:48:54,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2023-04-01 02:48:54,199 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 21 [2023-04-01 02:48:54,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:48:54,200 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2023-04-01 02:48:54,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 02:48:54,200 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2023-04-01 02:48:54,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 02:48:54,201 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:48:54,201 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:48:54,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 02:48:54,406 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 02:48:54,406 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:48:54,407 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:48:54,407 INFO L85 PathProgramCache]: Analyzing trace with hash -244507420, now seen corresponding path program 1 times [2023-04-01 02:48:54,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:48:54,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059532883] [2023-04-01 02:48:54,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:48:54,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:48:54,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:48:55,115 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:48:55,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:48:55,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059532883] [2023-04-01 02:48:55,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059532883] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:48:55,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080391638] [2023-04-01 02:48:55,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:48:55,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:48:55,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:48:55,119 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 02:48:55,121 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 02:48:55,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:48:55,185 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 43 conjunts are in the unsatisfiable core [2023-04-01 02:48:55,188 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:48:55,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-04-01 02:48:55,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 02:48:55,390 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-04-01 02:48:55,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2023-04-01 02:48:57,488 WARN L861 $PredicateComparison]: unable to prove that (exists ((v_main_~acopy~0.base_BEFORE_CALL_15 Int) (v_main_~a~0.base_BEFORE_CALL_15 Int) (v_main_~acopy~0.offset_BEFORE_CALL_14 Int) (~SIZE~0 Int)) (and (<= ~SIZE~0 2) (not (= v_main_~acopy~0.base_BEFORE_CALL_15 v_main_~a~0.base_BEFORE_CALL_15)) (let ((.cse0 (* ~SIZE~0 4))) (= (select (select |c_#memory_int| v_main_~a~0.base_BEFORE_CALL_15) (+ .cse0 (- 4))) (select (select |c_#memory_int| v_main_~acopy~0.base_BEFORE_CALL_15) (+ .cse0 (- 4) v_main_~acopy~0.offset_BEFORE_CALL_14)))) (< 1 ~SIZE~0))) is different from true [2023-04-01 02:48:57,691 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 02:48:57,695 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-04-01 02:48:57,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 13 [2023-04-01 02:48:57,728 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-04-01 02:48:57,729 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:48:59,826 WARN L839 $PredicateComparison]: unable to prove that (forall ((main_~acopy~0.offset Int) (v_ArrVal_108 Int)) (let ((.cse0 (store (let ((.cse1 (* c_main_~i~0 (- 4))) (.cse2 (* 4 c_~SIZE~0))) (store (select |c_#memory_int| c_main_~acopy~0.base) (+ .cse1 (- 4) .cse2 main_~acopy~0.offset) (select (select |c_#memory_int| c_main_~a~0.base) (+ .cse1 c_main_~a~0.offset (- 4) .cse2)))) (+ (* c_main_~i~0 4) main_~acopy~0.offset) v_ArrVal_108))) (= (select .cse0 (+ main_~acopy~0.offset 4)) (select (select (store |c_#memory_int| c_main_~acopy~0.base .cse0) c_main_~a~0.base) (+ c_main_~a~0.offset 4))))) is different from false [2023-04-01 02:49:44,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080391638] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:49:44,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [92686316] [2023-04-01 02:49:44,705 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-01 02:49:44,705 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:49:44,705 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:49:44,706 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:49:44,706 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:49:44,744 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-01 02:49:45,071 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 55 for LOIs [2023-04-01 02:49:45,109 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 27 for LOIs [2023-04-01 02:49:45,114 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 02:49:45,121 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:49:46,425 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1034#(and (<= 1 |#StackHeapBarrier|) (= ~MAX~0 100000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~SIZE~0 99999) (= |#NULL.offset| 0) (exists ((v_main_~acopy~0.base_BEFORE_CALL_23 Int) (v_main_~i~0_BEFORE_CALL_20 Int) (v_main_~a~0.base_BEFORE_CALL_23 Int)) (and (<= 0 v_main_~i~0_BEFORE_CALL_20) (<= 2 (+ ~SIZE~0 v_main_~i~0_BEFORE_CALL_20)) (not (= (select (select |#memory_int| v_main_~acopy~0.base_BEFORE_CALL_23) (* v_main_~i~0_BEFORE_CALL_20 4)) (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_23) (* v_main_~i~0_BEFORE_CALL_20 4)))) (<= (+ v_main_~acopy~0.base_BEFORE_CALL_23 1) |#StackHeapBarrier|) (<= ~SIZE~0 (+ v_main_~i~0_BEFORE_CALL_20 99999)) (<= (+ v_main_~a~0.base_BEFORE_CALL_23 1) |#StackHeapBarrier|) (< v_main_~i~0_BEFORE_CALL_20 ~SIZE~0) (<= 1 (+ v_main_~i~0_BEFORE_CALL_20 |#StackHeapBarrier|)))) (= |#NULL.base| 0))' at error location [2023-04-01 02:49:46,425 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:49:46,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 02:49:46,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 26 [2023-04-01 02:49:46,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481409969] [2023-04-01 02:49:46,426 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 02:49:46,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-01 02:49:46,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:49:46,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-01 02:49:46,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1893, Unknown=18, NotChecked=178, Total=2256 [2023-04-01 02:49:46,428 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5)