/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-crafted/zero_sum_const5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 14:54:46,518 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 14:54:46,519 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 14:54:46,536 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 14:54:46,536 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 14:54:46,537 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 14:54:46,537 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 14:54:46,539 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 14:54:46,540 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 14:54:46,540 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 14:54:46,541 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 14:54:46,542 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 14:54:46,542 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 14:54:46,542 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 14:54:46,543 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 14:54:46,544 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 14:54:46,544 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 14:54:46,545 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 14:54:46,546 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 14:54:46,547 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 14:54:46,548 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 14:54:46,549 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 14:54:46,549 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 14:54:46,550 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 14:54:46,552 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 14:54:46,552 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 14:54:46,553 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 14:54:46,553 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 14:54:46,553 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 14:54:46,554 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 14:54:46,554 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 14:54:46,555 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 14:54:46,555 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 14:54:46,556 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 14:54:46,556 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 14:54:46,556 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 14:54:46,557 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 14:54:46,557 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 14:54:46,557 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 14:54:46,558 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 14:54:46,558 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 14:54:46,569 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 [2023-04-02 14:54:46,581 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 14:54:46,581 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 14:54:46,581 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 14:54:46,582 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 14:54:46,589 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 14:54:46,589 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 14:54:46,589 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 14:54:46,589 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 14:54:46,589 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 14:54:46,589 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 14:54:46,589 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 14:54:46,589 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 14:54:46,589 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 14:54:46,590 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 14:54:46,590 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 14:54:46,590 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 14:54:46,590 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 14:54:46,590 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 14:54:46,590 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 14:54:46,590 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 14:54:46,590 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 14:54:46,590 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 14:54:46,591 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 14:54:46,591 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 14:54:46,591 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 14:54:46,591 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 14:54:46,591 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 14:54:46,591 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 14:54:46,591 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 14:54:46,591 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 14:54:46,591 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 14:54:46,591 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 14:54:46,591 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 14:54:46,592 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 14:54:46,592 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 14:54:46,592 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 14:54:46,592 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 14:54:46,592 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 14:54:46,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 14:54:46,592 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 14:54:46,592 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 14:54:46,592 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 14:54:46,766 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 14:54:46,792 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 14:54:46,793 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 14:54:46,794 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 14:54:46,795 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 14:54:46,796 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum_const5.c [2023-04-02 14:54:47,695 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 14:54:47,878 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 14:54:47,879 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const5.c [2023-04-02 14:54:47,884 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/046bdaf35/52c853f852144d479651016495092e10/FLAG59c66b981 [2023-04-02 14:54:48,278 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/046bdaf35/52c853f852144d479651016495092e10 [2023-04-02 14:54:48,280 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 14:54:48,281 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 14:54:48,282 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 14:54:48,282 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 14:54:48,284 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 14:54:48,284 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:54:48" (1/1) ... [2023-04-02 14:54:48,285 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f1943b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:54:48, skipping insertion in model container [2023-04-02 14:54:48,285 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:54:48" (1/1) ... [2023-04-02 14:54:48,293 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 14:54:48,302 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 14:54:48,390 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const5.c[406,419] [2023-04-02 14:54:48,403 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 14:54:48,410 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 14:54:48,417 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const5.c[406,419] [2023-04-02 14:54:48,424 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 14:54:48,432 INFO L208 MainTranslator]: Completed translation [2023-04-02 14:54:48,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:54:48 WrapperNode [2023-04-02 14:54:48,433 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 14:54:48,433 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 14:54:48,433 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 14:54:48,433 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 14:54:48,441 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:54:48" (1/1) ... [2023-04-02 14:54:48,441 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:54:48" (1/1) ... [2023-04-02 14:54:48,445 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:54:48" (1/1) ... [2023-04-02 14:54:48,445 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:54:48" (1/1) ... [2023-04-02 14:54:48,450 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:54:48" (1/1) ... [2023-04-02 14:54:48,454 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:54:48" (1/1) ... [2023-04-02 14:54:48,455 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:54:48" (1/1) ... [2023-04-02 14:54:48,456 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:54:48" (1/1) ... [2023-04-02 14:54:48,457 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 14:54:48,458 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 14:54:48,458 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 14:54:48,458 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 14:54:48,458 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:54:48" (1/1) ... [2023-04-02 14:54:48,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 14:54:48,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:54:48,487 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) [2023-04-02 14:54:48,489 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 [2023-04-02 14:54:48,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 14:54:48,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 14:54:48,512 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 14:54:48,512 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 14:54:48,512 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 14:54:48,512 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 14:54:48,512 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 14:54:48,512 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 14:54:48,512 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 14:54:48,512 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 14:54:48,512 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 14:54:48,512 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 14:54:48,512 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2023-04-02 14:54:48,512 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-02 14:54:48,513 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 14:54:48,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-02 14:54:48,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 14:54:48,513 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 14:54:48,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 14:54:48,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 14:54:48,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 14:54:48,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 14:54:48,600 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 14:54:48,602 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 14:54:48,843 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 14:54:48,934 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 14:54:48,934 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-04-02 14:54:48,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:54:48 BoogieIcfgContainer [2023-04-02 14:54:48,936 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 14:54:48,938 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 14:54:48,938 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 14:54:48,940 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 14:54:48,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 02:54:48" (1/3) ... [2023-04-02 14:54:48,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f29bc92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:54:48, skipping insertion in model container [2023-04-02 14:54:48,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:54:48" (2/3) ... [2023-04-02 14:54:48,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f29bc92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:54:48, skipping insertion in model container [2023-04-02 14:54:48,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:54:48" (3/3) ... [2023-04-02 14:54:48,942 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum_const5.c [2023-04-02 14:54:48,978 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 14:54:48,979 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 14:54:49,042 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 14:54:49,060 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;@5444e718, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 14:54:49,061 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 14:54:49,064 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 20 states have (on average 1.7) internal successors, (34), 22 states have internal predecessors, (34), 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) [2023-04-02 14:54:49,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-02 14:54:49,069 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:54:49,069 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:54:49,069 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:54:49,074 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:54:49,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1938672350, now seen corresponding path program 1 times [2023-04-02 14:54:49,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:54:49,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090780529] [2023-04-02 14:54:49,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:54:49,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:54:49,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:54:49,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:54:49,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:54:49,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090780529] [2023-04-02 14:54:49,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090780529] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 14:54:49,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 14:54:49,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 14:54:49,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867493840] [2023-04-02 14:54:49,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 14:54:49,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 14:54:49,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:54:49,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 14:54:49,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 14:54:49,334 INFO L87 Difference]: Start difference. First operand has 28 states, 20 states have (on average 1.7) internal successors, (34), 22 states have internal predecessors, (34), 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 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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) [2023-04-02 14:54:49,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:54:49,387 INFO L93 Difference]: Finished difference Result 50 states and 74 transitions. [2023-04-02 14:54:49,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 14:54:49,389 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-04-02 14:54:49,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:54:49,392 INFO L225 Difference]: With dead ends: 50 [2023-04-02 14:54:49,393 INFO L226 Difference]: Without dead ends: 23 [2023-04-02 14:54:49,396 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 [2023-04-02 14:54:49,398 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:54:49,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:54:49,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-04-02 14:54:49,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-04-02 14:54:49,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:54:49,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 33 transitions. [2023-04-02 14:54:49,419 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 33 transitions. Word has length 21 [2023-04-02 14:54:49,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:54:49,419 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 33 transitions. [2023-04-02 14:54:49,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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) [2023-04-02 14:54:49,419 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 33 transitions. [2023-04-02 14:54:49,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-02 14:54:49,420 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:54:49,420 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:54:49,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 14:54:49,420 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:54:49,421 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:54:49,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1987844596, now seen corresponding path program 1 times [2023-04-02 14:54:49,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:54:49,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280779310] [2023-04-02 14:54:49,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:54:49,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:54:49,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:54:49,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 14:54:49,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:54:49,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280779310] [2023-04-02 14:54:49,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280779310] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 14:54:49,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 14:54:49,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 14:54:49,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220819854] [2023-04-02 14:54:49,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 14:54:49,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 14:54:49,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:54:49,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 14:54:49,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-02 14:54:49,491 INFO L87 Difference]: Start difference. First operand 23 states and 33 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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) [2023-04-02 14:54:49,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:54:49,564 INFO L93 Difference]: Finished difference Result 47 states and 75 transitions. [2023-04-02 14:54:49,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 14:54:49,565 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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 22 [2023-04-02 14:54:49,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:54:49,565 INFO L225 Difference]: With dead ends: 47 [2023-04-02 14:54:49,566 INFO L226 Difference]: Without dead ends: 33 [2023-04-02 14:54:49,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-02 14:54:49,567 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 34 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:54:49,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 15 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:54:49,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-02 14:54:49,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-04-02 14:54:49,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:54:49,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2023-04-02 14:54:49,574 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 22 [2023-04-02 14:54:49,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:54:49,575 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2023-04-02 14:54:49,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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) [2023-04-02 14:54:49,575 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2023-04-02 14:54:49,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-02 14:54:49,576 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:54:49,576 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:54:49,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 14:54:49,576 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:54:49,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:54:49,577 INFO L85 PathProgramCache]: Analyzing trace with hash -700640283, now seen corresponding path program 1 times [2023-04-02 14:54:49,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:54:49,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125837468] [2023-04-02 14:54:49,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:54:49,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:54:49,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:54:49,671 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 14:54:49,671 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:54:49,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125837468] [2023-04-02 14:54:49,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125837468] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:54:49,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921788627] [2023-04-02 14:54:49,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:54:49,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:54:49,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:54:49,674 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) [2023-04-02 14:54:49,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 14:54:49,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:54:49,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 14:54:49,772 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:54:49,810 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 14:54:49,810 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:54:49,843 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 14:54:49,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921788627] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:54:49,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1837893311] [2023-04-02 14:54:49,859 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-02 14:54:49,860 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:54:49,862 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:54:49,865 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:54:49,865 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:54:49,956 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-02 14:54:50,422 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2023-04-02 14:54:50,432 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-02 14:54:50,438 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:54:50,743 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '502#(and (<= 1 |#StackHeapBarrier|) (= ~MAX~0 100000) (<= 2 ~SIZE~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~SIZE~0 99999) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:54:50,743 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:54:50,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:54:50,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-02 14:54:50,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606464707] [2023-04-02 14:54:50,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:54:50,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 14:54:50,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:54:50,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 14:54:50,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2023-04-02 14:54:50,748 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:54:50,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:54:50,806 INFO L93 Difference]: Finished difference Result 59 states and 79 transitions. [2023-04-02 14:54:50,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 14:54:50,806 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2023-04-02 14:54:50,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:54:50,807 INFO L225 Difference]: With dead ends: 59 [2023-04-02 14:54:50,807 INFO L226 Difference]: Without dead ends: 34 [2023-04-02 14:54:50,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2023-04-02 14:54:50,810 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:54:50,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:54:50,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-04-02 14:54:50,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-04-02 14:54:50,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 29 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:54:50,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2023-04-02 14:54:50,821 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 32 [2023-04-02 14:54:50,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:54:50,821 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2023-04-02 14:54:50,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:54:50,822 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2023-04-02 14:54:50,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-02 14:54:50,823 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:54:50,823 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:54:50,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-02 14:54:51,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:54:51,028 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:54:51,028 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:54:51,028 INFO L85 PathProgramCache]: Analyzing trace with hash 60184531, now seen corresponding path program 2 times [2023-04-02 14:54:51,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:54:51,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934545160] [2023-04-02 14:54:51,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:54:51,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:54:51,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:54:51,153 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 14:54:51,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:54:51,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934545160] [2023-04-02 14:54:51,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934545160] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:54:51,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104347760] [2023-04-02 14:54:51,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:54:51,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:54:51,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:54:51,175 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) [2023-04-02 14:54:51,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 14:54:51,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-02 14:54:51,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:54:51,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 14:54:51,260 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:54:51,300 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 14:54:51,301 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:54:51,333 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 14:54:51,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104347760] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:54:51,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1330502057] [2023-04-02 14:54:51,343 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-02 14:54:51,343 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:54:51,343 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:54:51,344 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:54:51,344 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:54:51,368 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-02 14:54:51,684 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2023-04-02 14:54:51,691 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-02 14:54:51,696 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:54:51,979 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '889#(and (<= 1 |#StackHeapBarrier|) (= ~MAX~0 100000) (<= 2 ~SIZE~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~SIZE~0 99999) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:54:51,979 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:54:51,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:54:51,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-04-02 14:54:51,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244776424] [2023-04-02 14:54:51,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:54:51,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 14:54:51,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:54:51,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 14:54:51,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-04-02 14:54:51,981 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 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) [2023-04-02 14:54:52,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:54:52,049 INFO L93 Difference]: Finished difference Result 67 states and 95 transitions. [2023-04-02 14:54:52,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 14:54:52,049 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 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 33 [2023-04-02 14:54:52,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:54:52,050 INFO L225 Difference]: With dead ends: 67 [2023-04-02 14:54:52,050 INFO L226 Difference]: Without dead ends: 44 [2023-04-02 14:54:52,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 83 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-04-02 14:54:52,050 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 22 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:54:52,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 24 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:54:52,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-04-02 14:54:52,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-04-02 14:54:52,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:54:52,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2023-04-02 14:54:52,055 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 33 [2023-04-02 14:54:52,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:54:52,055 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2023-04-02 14:54:52,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 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) [2023-04-02 14:54:52,055 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2023-04-02 14:54:52,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-02 14:54:52,056 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:54:52,056 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:54:52,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 14:54:52,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-04-02 14:54:52,261 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:54:52,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:54:52,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1592799038, now seen corresponding path program 3 times [2023-04-02 14:54:52,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:54:52,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620018835] [2023-04-02 14:54:52,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:54:52,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:54:52,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:54:54,823 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:54:54,824 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:54:54,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620018835] [2023-04-02 14:54:54,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620018835] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:54:54,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126031500] [2023-04-02 14:54:54,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:54:54,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:54:54,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:54:54,825 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) [2023-04-02 14:54:54,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 14:54:54,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:54:54,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:54:54,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 96 conjunts are in the unsatisfiable core [2023-04-02 14:54:54,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:54:55,227 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 14:54:55,227 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:54:55,552 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 14:54:55,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2023-04-02 14:54:55,659 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 14:54:55,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126031500] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:54:55,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [846718285] [2023-04-02 14:54:55,662 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-02 14:54:55,662 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:54:55,663 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:54:55,663 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:54:55,663 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:54:55,683 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-02 14:54:55,909 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2023-04-02 14:54:55,913 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-02 14:54:55,916 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:54:56,467 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1396#(and (<= 1 |#StackHeapBarrier|) (= ~MAX~0 100000) (<= 2 ~SIZE~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~SIZE~0 99999) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:54:56,467 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:54:56,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:54:56,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 32 [2023-04-02 14:54:56,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846786014] [2023-04-02 14:54:56,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:54:56,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-04-02 14:54:56,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:54:56,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-04-02 14:54:56,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1649, Unknown=0, NotChecked=0, Total=1806 [2023-04-02 14:54:56,473 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 32 states, 32 states have (on average 3.34375) internal successors, (107), 30 states have internal predecessors, (107), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:54:57,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:54:57,215 INFO L93 Difference]: Finished difference Result 77 states and 96 transitions. [2023-04-02 14:54:57,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-02 14:54:57,216 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.34375) internal successors, (107), 30 states have internal predecessors, (107), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2023-04-02 14:54:57,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:54:57,217 INFO L225 Difference]: With dead ends: 77 [2023-04-02 14:54:57,217 INFO L226 Difference]: Without dead ends: 72 [2023-04-02 14:54:57,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 114 SyntacticMatches, 10 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=240, Invalid=2516, Unknown=0, NotChecked=0, Total=2756 [2023-04-02 14:54:57,218 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 3 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 14:54:57,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 110 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 882 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 14:54:57,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-04-02 14:54:57,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2023-04-02 14:54:57,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.3076923076923077) internal successors, (85), 65 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:54:57,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 89 transitions. [2023-04-02 14:54:57,240 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 89 transitions. Word has length 43 [2023-04-02 14:54:57,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:54:57,240 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 89 transitions. [2023-04-02 14:54:57,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.34375) internal successors, (107), 30 states have internal predecessors, (107), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:54:57,241 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 89 transitions. [2023-04-02 14:54:57,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-04-02 14:54:57,242 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:54:57,243 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:54:57,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 14:54:57,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:54:57,448 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:54:57,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:54:57,449 INFO L85 PathProgramCache]: Analyzing trace with hash -2103940974, now seen corresponding path program 4 times [2023-04-02 14:54:57,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:54:57,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854644118] [2023-04-02 14:54:57,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:54:57,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:54:57,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:54:57,567 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-04-02 14:54:57,568 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:54:57,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854644118] [2023-04-02 14:54:57,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854644118] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:54:57,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315747654] [2023-04-02 14:54:57,568 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:54:57,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:54:57,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:54:57,585 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) [2023-04-02 14:54:57,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 14:54:57,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:54:57,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-02 14:54:57,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:54:57,732 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-04-02 14:54:57,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:54:57,779 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-04-02 14:54:57,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315747654] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:54:57,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1642329139] [2023-04-02 14:54:57,781 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-02 14:54:57,782 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:54:57,782 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:54:57,783 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:54:57,783 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:54:57,828 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-02 14:54:58,014 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2023-04-02 14:54:58,018 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-02 14:54:58,021 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:54:58,325 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1983#(and (<= 1 |#StackHeapBarrier|) (= ~MAX~0 100000) (<= 2 ~SIZE~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~SIZE~0 99999) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:54:58,325 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:54:58,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:54:58,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-04-02 14:54:58,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417453188] [2023-04-02 14:54:58,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:54:58,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 14:54:58,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:54:58,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 14:54:58,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2023-04-02 14:54:58,327 INFO L87 Difference]: Start difference. First operand 70 states and 89 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 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) [2023-04-02 14:54:58,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:54:58,552 INFO L93 Difference]: Finished difference Result 148 states and 194 transitions. [2023-04-02 14:54:58,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 14:54:58,553 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 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 44 [2023-04-02 14:54:58,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:54:58,575 INFO L225 Difference]: With dead ends: 148 [2023-04-02 14:54:58,575 INFO L226 Difference]: Without dead ends: 85 [2023-04-02 14:54:58,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 112 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2023-04-02 14:54:58,576 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 9 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 14:54:58,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 29 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 14:54:58,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-04-02 14:54:58,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 78. [2023-04-02 14:54:58,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.2602739726027397) internal successors, (92), 73 states have internal predecessors, (92), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:54:58,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 96 transitions. [2023-04-02 14:54:58,592 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 96 transitions. Word has length 44 [2023-04-02 14:54:58,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:54:58,592 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 96 transitions. [2023-04-02 14:54:58,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 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) [2023-04-02 14:54:58,592 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 96 transitions. [2023-04-02 14:54:58,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-02 14:54:58,596 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:54:58,596 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:54:58,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 14:54:58,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:54:58,801 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:54:58,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:54:58,802 INFO L85 PathProgramCache]: Analyzing trace with hash -189278818, now seen corresponding path program 5 times [2023-04-02 14:54:58,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:54:58,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828473542] [2023-04-02 14:54:58,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:54:58,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:54:58,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:54:58,896 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-02 14:54:58,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:54:58,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828473542] [2023-04-02 14:54:58,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828473542] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:54:58,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236611112] [2023-04-02 14:54:58,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:54:58,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:54:58,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:54:58,921 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) [2023-04-02 14:54:58,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 14:54:59,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 14:54:59,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:54:59,042 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-02 14:54:59,045 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:54:59,098 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-02 14:54:59,098 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:54:59,150 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-02 14:54:59,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236611112] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:54:59,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [307435940] [2023-04-02 14:54:59,153 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-02 14:54:59,153 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:54:59,154 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:54:59,154 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:54:59,154 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:54:59,179 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-02 14:54:59,376 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2023-04-02 14:54:59,380 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-02 14:54:59,384 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:54:59,681 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2717#(and (<= 1 |#StackHeapBarrier|) (= ~MAX~0 100000) (<= 2 ~SIZE~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~SIZE~0 99999) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:54:59,681 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:54:59,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:54:59,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-04-02 14:54:59,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373987965] [2023-04-02 14:54:59,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:54:59,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 14:54:59,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:54:59,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 14:54:59,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2023-04-02 14:54:59,683 INFO L87 Difference]: Start difference. First operand 78 states and 96 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 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) [2023-04-02 14:54:59,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:54:59,873 INFO L93 Difference]: Finished difference Result 84 states and 102 transitions. [2023-04-02 14:54:59,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 14:54:59,874 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 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 45 [2023-04-02 14:54:59,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:54:59,875 INFO L225 Difference]: With dead ends: 84 [2023-04-02 14:54:59,876 INFO L226 Difference]: Without dead ends: 55 [2023-04-02 14:54:59,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 114 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2023-04-02 14:54:59,877 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 12 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:54:59,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 26 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:54:59,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-04-02 14:54:59,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2023-04-02 14:54:59,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.22) internal successors, (61), 50 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:54:59,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2023-04-02 14:54:59,908 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 45 [2023-04-02 14:54:59,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:54:59,909 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2023-04-02 14:54:59,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 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) [2023-04-02 14:54:59,909 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2023-04-02 14:54:59,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-02 14:54:59,910 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:54:59,910 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:54:59,929 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-02 14:55:00,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:55:00,115 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:55:00,116 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:55:00,116 INFO L85 PathProgramCache]: Analyzing trace with hash -966551995, now seen corresponding path program 6 times [2023-04-02 14:55:00,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:55:00,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748693157] [2023-04-02 14:55:00,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:55:00,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:55:00,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:55:04,074 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:55:04,074 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:55:04,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748693157] [2023-04-02 14:55:04,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748693157] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:55:04,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718551379] [2023-04-02 14:55:04,074 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:55:04,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:55:04,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:55:04,090 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) [2023-04-02 14:55:04,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 14:55:04,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:55:04,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:55:04,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 130 conjunts are in the unsatisfiable core [2023-04-02 14:55:04,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:55:04,734 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 14:55:04,734 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:55:05,218 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 14:55:05,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 89 [2023-04-02 14:55:05,377 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 14:55:05,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718551379] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:55:05,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [844124583] [2023-04-02 14:55:05,378 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-02 14:55:05,379 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:55:05,379 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:55:05,379 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:55:05,379 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:55:05,394 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-02 14:55:05,578 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2023-04-02 14:55:05,583 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-02 14:55:05,585 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:55:06,219 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3378#(and (<= 1 |#StackHeapBarrier|) (= ~MAX~0 100000) (<= 2 ~SIZE~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~SIZE~0 99999) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:55:06,219 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:55:06,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:55:06,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 13, 13] total 54 [2023-04-02 14:55:06,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256451112] [2023-04-02 14:55:06,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:55:06,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-04-02 14:55:06,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:55:06,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-04-02 14:55:06,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=3946, Unknown=0, NotChecked=0, Total=4160 [2023-04-02 14:55:06,222 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 54 states, 54 states have (on average 2.5185185185185186) internal successors, (136), 52 states have internal predecessors, (136), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:55:09,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:55:09,554 INFO L93 Difference]: Finished difference Result 143 states and 177 transitions. [2023-04-02 14:55:09,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-04-02 14:55:09,554 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.5185185185185186) internal successors, (136), 52 states have internal predecessors, (136), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2023-04-02 14:55:09,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:55:09,555 INFO L225 Difference]: With dead ends: 143 [2023-04-02 14:55:09,555 INFO L226 Difference]: Without dead ends: 137 [2023-04-02 14:55:09,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 143 SyntacticMatches, 3 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1836 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=743, Invalid=7629, Unknown=0, NotChecked=0, Total=8372 [2023-04-02 14:55:09,558 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 194 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 3439 mSolverCounterSat, 663 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 4102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 663 IncrementalHoareTripleChecker+Valid, 3439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-02 14:55:09,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 204 Invalid, 4102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [663 Valid, 3439 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-02 14:55:09,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-04-02 14:55:09,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 57. [2023-04-02 14:55:09,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.2307692307692308) internal successors, (64), 52 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:55:09,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2023-04-02 14:55:09,601 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 54 [2023-04-02 14:55:09,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:55:09,602 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2023-04-02 14:55:09,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.5185185185185186) internal successors, (136), 52 states have internal predecessors, (136), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:55:09,603 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2023-04-02 14:55:09,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-02 14:55:09,604 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:55:09,604 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:55:09,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-02 14:55:09,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:55:09,810 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:55:09,810 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:55:09,810 INFO L85 PathProgramCache]: Analyzing trace with hash -378742066, now seen corresponding path program 7 times [2023-04-02 14:55:09,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:55:09,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709223849] [2023-04-02 14:55:09,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:55:09,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:55:09,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:55:09,919 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-04-02 14:55:09,920 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:55:09,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709223849] [2023-04-02 14:55:09,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709223849] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:55:09,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671714516] [2023-04-02 14:55:09,920 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:55:09,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:55:09,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:55:09,927 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) [2023-04-02 14:55:09,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 14:55:09,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:55:09,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-02 14:55:09,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:55:10,072 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-04-02 14:55:10,072 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:55:10,138 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-04-02 14:55:10,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671714516] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:55:10,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [870636114] [2023-04-02 14:55:10,139 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-02 14:55:10,139 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:55:10,139 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:55:10,140 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:55:10,140 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:55:10,154 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-02 14:55:10,366 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2023-04-02 14:55:10,370 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-02 14:55:10,373 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:55:10,684 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4174#(and (<= 1 |#StackHeapBarrier|) (= ~MAX~0 100000) (<= 2 ~SIZE~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~SIZE~0 99999) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:55:10,684 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:55:10,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:55:10,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-04-02 14:55:10,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850319986] [2023-04-02 14:55:10,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:55:10,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-02 14:55:10,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:55:10,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-02 14:55:10,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2023-04-02 14:55:10,685 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 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) [2023-04-02 14:55:10,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:55:10,930 INFO L93 Difference]: Finished difference Result 155 states and 194 transitions. [2023-04-02 14:55:10,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 14:55:10,931 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 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 55 [2023-04-02 14:55:10,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:55:10,931 INFO L225 Difference]: With dead ends: 155 [2023-04-02 14:55:10,931 INFO L226 Difference]: Without dead ends: 71 [2023-04-02 14:55:10,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 142 SyntacticMatches, 7 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=154, Invalid=838, Unknown=0, NotChecked=0, Total=992 [2023-04-02 14:55:10,933 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 6 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 14:55:10,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 49 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 14:55:10,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-04-02 14:55:10,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 65. [2023-04-02 14:55:10,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:55:10,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2023-04-02 14:55:10,942 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 55 [2023-04-02 14:55:10,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:55:10,943 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2023-04-02 14:55:10,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 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) [2023-04-02 14:55:10,943 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2023-04-02 14:55:10,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-04-02 14:55:10,943 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:55:10,943 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:55:10,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-02 14:55:11,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:55:11,150 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:55:11,151 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:55:11,151 INFO L85 PathProgramCache]: Analyzing trace with hash -473168345, now seen corresponding path program 8 times [2023-04-02 14:55:11,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:55:11,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255273064] [2023-04-02 14:55:11,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:55:11,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:55:11,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:55:11,258 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-04-02 14:55:11,259 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:55:11,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255273064] [2023-04-02 14:55:11,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255273064] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:55:11,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010953397] [2023-04-02 14:55:11,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:55:11,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:55:11,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:55:11,260 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) [2023-04-02 14:55:11,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 14:55:11,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 14:55:11,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:55:11,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-02 14:55:11,366 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:55:11,447 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-04-02 14:55:11,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:55:11,518 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-04-02 14:55:11,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010953397] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:55:11,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1030472579] [2023-04-02 14:55:11,519 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-02 14:55:11,519 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:55:11,520 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:55:11,520 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:55:11,520 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:55:11,551 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-02 14:55:11,722 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2023-04-02 14:55:11,726 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-02 14:55:11,728 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:55:12,044 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5015#(and (<= 1 |#StackHeapBarrier|) (= ~MAX~0 100000) (<= 2 ~SIZE~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~SIZE~0 99999) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:55:12,044 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:55:12,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:55:12,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-04-02 14:55:12,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468256944] [2023-04-02 14:55:12,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:55:12,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-02 14:55:12,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:55:12,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-02 14:55:12,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2023-04-02 14:55:12,046 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 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) [2023-04-02 14:55:12,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:55:12,279 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2023-04-02 14:55:12,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 14:55:12,280 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 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 64 [2023-04-02 14:55:12,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:55:12,280 INFO L225 Difference]: With dead ends: 71 [2023-04-02 14:55:12,280 INFO L226 Difference]: Without dead ends: 66 [2023-04-02 14:55:12,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 172 SyntacticMatches, 8 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=163, Invalid=959, Unknown=0, NotChecked=0, Total=1122 [2023-04-02 14:55:12,281 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 8 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:55:12,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 65 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:55:12,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-04-02 14:55:12,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2023-04-02 14:55:12,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.180327868852459) internal successors, (72), 61 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:55:12,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2023-04-02 14:55:12,291 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 64 [2023-04-02 14:55:12,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:55:12,291 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2023-04-02 14:55:12,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 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) [2023-04-02 14:55:12,292 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2023-04-02 14:55:12,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-04-02 14:55:12,292 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:55:12,292 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:55:12,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-02 14:55:12,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-02 14:55:12,497 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:55:12,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:55:12,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1932602270, now seen corresponding path program 9 times [2023-04-02 14:55:12,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:55:12,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263614956] [2023-04-02 14:55:12,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:55:12,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:55:12,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:55:17,354 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:55:17,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:55:17,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263614956] [2023-04-02 14:55:17,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263614956] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:55:17,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079479838] [2023-04-02 14:55:17,355 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:55:17,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:55:17,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:55:17,360 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) [2023-04-02 14:55:17,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-02 14:55:17,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:55:17,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:55:17,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 172 conjunts are in the unsatisfiable core [2023-04-02 14:55:17,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:55:18,088 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 14:55:18,088 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:55:18,830 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 14:55:18,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 69 treesize of output 153 [2023-04-02 14:55:19,277 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 14:55:19,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079479838] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:55:19,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [290861965] [2023-04-02 14:55:19,279 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-02 14:55:19,279 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:55:19,279 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:55:19,279 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:55:19,279 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:55:19,293 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-02 14:55:19,442 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2023-04-02 14:55:19,445 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-02 14:55:19,448 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:55:20,171 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5756#(and (<= 1 |#StackHeapBarrier|) (= ~MAX~0 100000) (<= 2 ~SIZE~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~SIZE~0 99999) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:55:20,171 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:55:20,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:55:20,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 15, 15] total 66 [2023-04-02 14:55:20,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667896506] [2023-04-02 14:55:20,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:55:20,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-04-02 14:55:20,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:55:20,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-04-02 14:55:20,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=5580, Unknown=0, NotChecked=0, Total=5852 [2023-04-02 14:55:20,174 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand has 66 states, 66 states have (on average 2.5303030303030303) internal successors, (167), 64 states have internal predecessors, (167), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:55:24,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:55:24,993 INFO L93 Difference]: Finished difference Result 206 states and 250 transitions. [2023-04-02 14:55:24,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-04-02 14:55:24,993 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.5303030303030303) internal successors, (167), 64 states have internal predecessors, (167), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2023-04-02 14:55:24,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:55:24,994 INFO L225 Difference]: With dead ends: 206 [2023-04-02 14:55:24,994 INFO L226 Difference]: Without dead ends: 152 [2023-04-02 14:55:24,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 175 SyntacticMatches, 3 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2613 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=891, Invalid=10665, Unknown=0, NotChecked=0, Total=11556 [2023-04-02 14:55:24,997 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 203 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 3640 mSolverCounterSat, 1068 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 4708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1068 IncrementalHoareTripleChecker+Valid, 3640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-04-02 14:55:24,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 220 Invalid, 4708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1068 Valid, 3640 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-04-02 14:55:24,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-04-02 14:55:25,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 121. [2023-04-02 14:55:25,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.1724137931034482) internal successors, (136), 116 states have internal predecessors, (136), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:55:25,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 140 transitions. [2023-04-02 14:55:25,021 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 140 transitions. Word has length 65 [2023-04-02 14:55:25,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:55:25,022 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 140 transitions. [2023-04-02 14:55:25,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.5303030303030303) internal successors, (167), 64 states have internal predecessors, (167), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:55:25,022 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 140 transitions. [2023-04-02 14:55:25,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-04-02 14:55:25,022 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:55:25,022 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:55:25,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-02 14:55:25,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:55:25,228 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:55:25,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:55:25,228 INFO L85 PathProgramCache]: Analyzing trace with hash 69586311, now seen corresponding path program 10 times [2023-04-02 14:55:25,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:55:25,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172290865] [2023-04-02 14:55:25,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:55:25,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:55:25,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:55:25,351 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-04-02 14:55:25,351 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:55:25,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172290865] [2023-04-02 14:55:25,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172290865] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:55:25,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164173475] [2023-04-02 14:55:25,352 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:55:25,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:55:25,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:55:25,365 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) [2023-04-02 14:55:25,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-02 14:55:25,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:55:25,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 14:55:25,455 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:55:25,565 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-04-02 14:55:25,566 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:55:25,654 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-04-02 14:55:25,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164173475] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:55:25,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [741625777] [2023-04-02 14:55:25,656 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-02 14:55:25,656 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:55:25,656 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:55:25,656 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:55:25,656 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:55:25,671 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-02 14:55:25,846 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2023-04-02 14:55:25,851 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-02 14:55:25,854 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:55:26,179 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6882#(and (<= 1 |#StackHeapBarrier|) (= ~MAX~0 100000) (<= 2 ~SIZE~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~SIZE~0 99999) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:55:26,179 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:55:26,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:55:26,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-04-02 14:55:26,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891560982] [2023-04-02 14:55:26,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:55:26,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-02 14:55:26,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:55:26,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-02 14:55:26,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=791, Unknown=0, NotChecked=0, Total=930 [2023-04-02 14:55:26,181 INFO L87 Difference]: Start difference. First operand 121 states and 140 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:55:26,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:55:26,490 INFO L93 Difference]: Finished difference Result 221 states and 260 transitions. [2023-04-02 14:55:26,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-02 14:55:26,491 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2023-04-02 14:55:26,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:55:26,491 INFO L225 Difference]: With dead ends: 221 [2023-04-02 14:55:26,491 INFO L226 Difference]: Without dead ends: 82 [2023-04-02 14:55:26,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 172 SyntacticMatches, 9 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2023-04-02 14:55:26,492 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 6 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 369 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 369 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 14:55:26,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 33 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [369 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 14:55:26,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-04-02 14:55:26,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2023-04-02 14:55:26,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 71 states have internal predecessors, (82), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:55:26,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2023-04-02 14:55:26,507 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 66 [2023-04-02 14:55:26,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:55:26,507 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2023-04-02 14:55:26,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:55:26,508 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2023-04-02 14:55:26,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-02 14:55:26,508 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:55:26,508 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:55:26,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-02 14:55:26,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-02 14:55:26,711 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:55:26,711 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:55:26,711 INFO L85 PathProgramCache]: Analyzing trace with hash -2110351996, now seen corresponding path program 11 times [2023-04-02 14:55:26,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:55:26,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444794115] [2023-04-02 14:55:26,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:55:26,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:55:26,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:55:26,837 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-04-02 14:55:26,837 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:55:26,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444794115] [2023-04-02 14:55:26,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444794115] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:55:26,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347671841] [2023-04-02 14:55:26,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:55:26,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:55:26,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:55:26,853 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) [2023-04-02 14:55:26,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-02 14:55:26,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-02 14:55:26,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:55:26,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 14:55:26,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:55:27,061 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-04-02 14:55:27,062 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:55:27,149 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-04-02 14:55:27,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347671841] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:55:27,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [659707828] [2023-04-02 14:55:27,150 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-02 14:55:27,150 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:55:27,150 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:55:27,150 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:55:27,150 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:55:27,168 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-02 14:55:27,345 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2023-04-02 14:55:27,349 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-02 14:55:27,352 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:55:27,662 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7948#(and (<= 1 |#StackHeapBarrier|) (= ~MAX~0 100000) (<= 2 ~SIZE~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~SIZE~0 99999) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:55:27,662 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:55:27,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:55:27,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-04-02 14:55:27,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009904637] [2023-04-02 14:55:27,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:55:27,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-02 14:55:27,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:55:27,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-02 14:55:27,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2023-04-02 14:55:27,663 INFO L87 Difference]: Start difference. First operand 76 states and 86 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 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) [2023-04-02 14:55:27,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:55:27,925 INFO L93 Difference]: Finished difference Result 82 states and 92 transitions. [2023-04-02 14:55:27,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-02 14:55:27,925 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 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 75 [2023-04-02 14:55:27,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:55:27,926 INFO L225 Difference]: With dead ends: 82 [2023-04-02 14:55:27,926 INFO L226 Difference]: Without dead ends: 77 [2023-04-02 14:55:27,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 203 SyntacticMatches, 10 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=207, Invalid=1199, Unknown=0, NotChecked=0, Total=1406 [2023-04-02 14:55:27,927 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 10 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 14:55:27,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 54 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 14:55:27,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-04-02 14:55:27,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2023-04-02 14:55:27,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.1527777777777777) internal successors, (83), 72 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:55:27,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2023-04-02 14:55:27,942 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 75 [2023-04-02 14:55:27,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:55:27,942 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2023-04-02 14:55:27,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 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) [2023-04-02 14:55:27,942 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2023-04-02 14:55:27,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-02 14:55:27,943 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:55:27,943 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:55:27,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-02 14:55:28,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-02 14:55:28,149 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:55:28,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:55:28,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1145687899, now seen corresponding path program 12 times [2023-04-02 14:55:28,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:55:28,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842518832] [2023-04-02 14:55:28,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:55:28,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:55:28,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:55:34,544 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 3 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:55:34,544 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:55:34,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842518832] [2023-04-02 14:55:34,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842518832] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:55:34,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205753549] [2023-04-02 14:55:34,544 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:55:34,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:55:34,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:55:34,561 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:55:34,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-02 14:55:34,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:55:34,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:55:34,655 WARN L260 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 222 conjunts are in the unsatisfiable core [2023-04-02 14:55:34,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:55:35,507 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 5 proven. 150 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 14:55:35,507 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:55:37,000 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 14:55:37,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 86 treesize of output 235 [2023-04-02 14:55:38,211 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 14:55:38,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205753549] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:55:38,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [789283298] [2023-04-02 14:55:38,213 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-02 14:55:38,213 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:55:38,213 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:55:38,213 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:55:38,213 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:55:38,227 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-02 14:55:38,425 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2023-04-02 14:55:38,431 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-02 14:55:38,436 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:55:39,377 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8827#(and (<= 1 |#StackHeapBarrier|) (= ~MAX~0 100000) (<= 2 ~SIZE~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~SIZE~0 99999) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:55:39,377 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:55:39,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:55:39,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 19, 26] total 91 [2023-04-02 14:55:39,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806953002] [2023-04-02 14:55:39,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:55:39,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2023-04-02 14:55:39,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:55:39,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2023-04-02 14:55:39,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=608, Invalid=9694, Unknown=0, NotChecked=0, Total=10302 [2023-04-02 14:55:39,381 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand has 91 states, 91 states have (on average 2.230769230769231) internal successors, (203), 89 states have internal predecessors, (203), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:55:46,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:55:46,061 INFO L93 Difference]: Finished difference Result 230 states and 269 transitions. [2023-04-02 14:55:46,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-04-02 14:55:46,062 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.230769230769231) internal successors, (203), 89 states have internal predecessors, (203), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2023-04-02 14:55:46,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:55:46,062 INFO L225 Difference]: With dead ends: 230 [2023-04-02 14:55:46,062 INFO L226 Difference]: Without dead ends: 107 [2023-04-02 14:55:46,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 194 SyntacticMatches, 3 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5198 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=1630, Invalid=17830, Unknown=0, NotChecked=0, Total=19460 [2023-04-02 14:55:46,064 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 197 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 4675 mSolverCounterSat, 1573 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 6248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1573 IncrementalHoareTripleChecker+Valid, 4675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-04-02 14:55:46,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 282 Invalid, 6248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1573 Valid, 4675 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-04-02 14:55:46,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-04-02 14:55:46,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 87. [2023-04-02 14:55:46,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.1829268292682926) internal successors, (97), 82 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:55:46,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 101 transitions. [2023-04-02 14:55:46,086 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 101 transitions. Word has length 76 [2023-04-02 14:55:46,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:55:46,086 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 101 transitions. [2023-04-02 14:55:46,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.230769230769231) internal successors, (203), 89 states have internal predecessors, (203), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:55:46,087 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 101 transitions. [2023-04-02 14:55:46,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-04-02 14:55:46,087 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:55:46,087 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:55:46,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-04-02 14:55:46,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-04-02 14:55:46,292 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:55:46,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:55:46,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1689242930, now seen corresponding path program 13 times [2023-04-02 14:55:46,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:55:46,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923042952] [2023-04-02 14:55:46,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:55:46,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:55:46,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:55:46,439 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2023-04-02 14:55:46,440 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:55:46,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923042952] [2023-04-02 14:55:46,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923042952] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:55:46,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341669098] [2023-04-02 14:55:46,440 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:55:46,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:55:46,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:55:46,442 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:55:46,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-02 14:55:46,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:55:46,533 INFO L262 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 14 conjunts are in the unsatisfiable core [2023-04-02 14:55:46,535 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:55:46,606 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2023-04-02 14:55:46,606 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:55:46,679 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2023-04-02 14:55:46,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341669098] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:55:46,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1233669608] [2023-04-02 14:55:46,681 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-02 14:55:46,681 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:55:46,681 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:55:46,681 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:55:46,681 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:55:46,703 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-02 14:55:46,894 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2023-04-02 14:55:46,897 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-02 14:55:46,900 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:55:47,175 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10046#(and (<= 1 |#StackHeapBarrier|) (= ~MAX~0 100000) (<= 2 ~SIZE~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~SIZE~0 99999) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:55:47,175 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:55:47,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:55:47,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-04-02 14:55:47,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575424086] [2023-04-02 14:55:47,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:55:47,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-02 14:55:47,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:55:47,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-02 14:55:47,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=956, Unknown=0, NotChecked=0, Total=1122 [2023-04-02 14:55:47,178 INFO L87 Difference]: Start difference. First operand 87 states and 101 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 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) [2023-04-02 14:55:47,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:55:47,470 INFO L93 Difference]: Finished difference Result 149 states and 179 transitions. [2023-04-02 14:55:47,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-02 14:55:47,471 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 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 82 [2023-04-02 14:55:47,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:55:47,471 INFO L225 Difference]: With dead ends: 149 [2023-04-02 14:55:47,471 INFO L226 Difference]: Without dead ends: 88 [2023-04-02 14:55:47,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 216 SyntacticMatches, 12 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=258, Invalid=1464, Unknown=0, NotChecked=0, Total=1722 [2023-04-02 14:55:47,473 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 49 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 14:55:47,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 38 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 14:55:47,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-04-02 14:55:47,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2023-04-02 14:55:47,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.1325301204819278) internal successors, (94), 83 states have internal predecessors, (94), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:55:47,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2023-04-02 14:55:47,496 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 82 [2023-04-02 14:55:47,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:55:47,497 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2023-04-02 14:55:47,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 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) [2023-04-02 14:55:47,497 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2023-04-02 14:55:47,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-02 14:55:47,497 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:55:47,497 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:55:47,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-04-02 14:55:47,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-04-02 14:55:47,702 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:55:47,703 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:55:47,703 INFO L85 PathProgramCache]: Analyzing trace with hash -659996670, now seen corresponding path program 14 times [2023-04-02 14:55:47,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:55:47,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833723198] [2023-04-02 14:55:47,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:55:47,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:55:47,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:55:56,944 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 12 proven. 219 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:55:56,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:55:56,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833723198] [2023-04-02 14:55:56,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833723198] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:55:56,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449841666] [2023-04-02 14:55:56,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:55:56,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:55:56,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:55:56,946 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:55:56,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-04-02 14:55:57,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-02 14:55:57,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:55:57,063 WARN L260 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 267 conjunts are in the unsatisfiable core [2023-04-02 14:55:57,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:55:57,125 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 [2023-04-02 14:55:59,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 14:55:59,165 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 14:55:59,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 35 [2023-04-02 14:55:59,377 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 6 proven. 210 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 14:55:59,377 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:56:07,727 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 14:56:07,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449841666] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:56:07,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1406083072] [2023-04-02 14:56:07,729 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-02 14:56:07,729 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:56:07,729 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:56:07,729 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:56:07,729 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:56:07,743 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-02 14:56:07,926 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2023-04-02 14:56:07,930 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-02 14:56:07,932 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:56:08,989 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11150#(and (<= 1 |#StackHeapBarrier|) (= ~MAX~0 100000) (<= 2 ~SIZE~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~SIZE~0 99999) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:56:08,989 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:56:08,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:56:08,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 22, 19] total 97 [2023-04-02 14:56:08,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323944513] [2023-04-02 14:56:08,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:56:08,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-04-02 14:56:08,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:56:08,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-04-02 14:56:08,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=514, Invalid=11042, Unknown=0, NotChecked=0, Total=11556 [2023-04-02 14:56:08,991 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand has 97 states, 97 states have (on average 2.402061855670103) internal successors, (233), 95 states have internal predecessors, (233), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:56:36,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:56:36,617 INFO L93 Difference]: Finished difference Result 598 states and 691 transitions. [2023-04-02 14:56:36,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2023-04-02 14:56:36,617 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.402061855670103) internal successors, (233), 95 states have internal predecessors, (233), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2023-04-02 14:56:36,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:56:36,619 INFO L225 Difference]: With dead ends: 598 [2023-04-02 14:56:36,619 INFO L226 Difference]: Without dead ends: 449 [2023-04-02 14:56:36,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 205 SyntacticMatches, 30 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14673 ImplicationChecksByTransitivity, 28.1s TimeCoverageRelationStatistics Valid=3489, Invalid=43817, Unknown=0, NotChecked=0, Total=47306 [2023-04-02 14:56:36,622 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 119 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 11506 mSolverCounterSat, 1837 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 13343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1837 IncrementalHoareTripleChecker+Valid, 11506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2023-04-02 14:56:36,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 309 Invalid, 13343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1837 Valid, 11506 Invalid, 0 Unknown, 0 Unchecked, 10.8s Time] [2023-04-02 14:56:36,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2023-04-02 14:56:36,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 293. [2023-04-02 14:56:36,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 288 states have (on average 1.1597222222222223) internal successors, (334), 288 states have internal predecessors, (334), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:56:36,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 338 transitions. [2023-04-02 14:56:36,737 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 338 transitions. Word has length 87 [2023-04-02 14:56:36,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:56:36,738 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 338 transitions. [2023-04-02 14:56:36,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.402061855670103) internal successors, (233), 95 states have internal predecessors, (233), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:56:36,738 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 338 transitions. [2023-04-02 14:56:36,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-04-02 14:56:36,739 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:56:36,739 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:56:36,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-04-02 14:56:36,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:56:36,944 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:56:36,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:56:36,944 INFO L85 PathProgramCache]: Analyzing trace with hash -438938816, now seen corresponding path program 15 times [2023-04-02 14:56:36,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:56:36,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807830204] [2023-04-02 14:56:36,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:56:36,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:56:36,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:56:37,159 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2023-04-02 14:56:37,159 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:56:37,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807830204] [2023-04-02 14:56:37,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807830204] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:56:37,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632114017] [2023-04-02 14:56:37,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:56:37,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:56:37,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:56:37,182 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:56:37,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-04-02 14:56:37,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:56:37,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:56:37,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-02 14:56:37,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:56:37,468 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2023-04-02 14:56:37,468 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:56:37,650 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2023-04-02 14:56:37,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632114017] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:56:37,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1092443110] [2023-04-02 14:56:37,659 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-02 14:56:37,659 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:56:37,660 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:56:37,660 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:56:37,660 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:56:37,680 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-02 14:56:37,850 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2023-04-02 14:56:37,853 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-02 14:56:37,856 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:56:38,289 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13715#(and (<= 1 |#StackHeapBarrier|) (= ~MAX~0 100000) (<= 2 ~SIZE~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~SIZE~0 99999) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:56:38,289 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:56:38,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:56:38,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 39 [2023-04-02 14:56:38,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60069707] [2023-04-02 14:56:38,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:56:38,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-04-02 14:56:38,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:56:38,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-04-02 14:56:38,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=2162, Unknown=0, NotChecked=0, Total=2450 [2023-04-02 14:56:38,290 INFO L87 Difference]: Start difference. First operand 293 states and 338 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 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) [2023-04-02 14:56:38,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:56:38,856 INFO L93 Difference]: Finished difference Result 427 states and 503 transitions. [2023-04-02 14:56:38,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-02 14:56:38,857 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 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 89 [2023-04-02 14:56:38,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:56:38,857 INFO L225 Difference]: With dead ends: 427 [2023-04-02 14:56:38,857 INFO L226 Difference]: Without dead ends: 171 [2023-04-02 14:56:38,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 228 SyntacticMatches, 8 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1360 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=470, Invalid=3690, Unknown=0, NotChecked=0, Total=4160 [2023-04-02 14:56:38,873 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 97 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 408 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 408 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 14:56:38,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 78 Invalid, 1232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [408 Valid, 824 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 14:56:38,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-04-02 14:56:38,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 99. [2023-04-02 14:56:38,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.1170212765957446) internal successors, (105), 94 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:56:38,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2023-04-02 14:56:38,926 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 89 [2023-04-02 14:56:38,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:56:38,927 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2023-04-02 14:56:38,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 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) [2023-04-02 14:56:38,927 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2023-04-02 14:56:38,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-04-02 14:56:38,929 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:56:38,930 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:56:38,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-04-02 14:56:39,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-04-02 14:56:39,135 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:56:39,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:56:39,135 INFO L85 PathProgramCache]: Analyzing trace with hash -730143995, now seen corresponding path program 16 times [2023-04-02 14:56:39,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:56:39,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114086112] [2023-04-02 14:56:39,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:56:39,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:56:39,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:56:52,177 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 22 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:56:52,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:56:52,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114086112] [2023-04-02 14:56:52,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114086112] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:56:52,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924369694] [2023-04-02 14:56:52,177 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:56:52,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:56:52,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:56:52,178 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:56:52,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-04-02 14:56:52,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:56:52,329 WARN L260 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 306 conjunts are in the unsatisfiable core [2023-04-02 14:56:52,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:56:52,616 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 [2023-04-02 14:56:53,850 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:56:53,850 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:56:55,092 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 280 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-02 14:56:55,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924369694] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:56:55,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1540124756] [2023-04-02 14:56:55,103 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-02 14:56:55,103 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:56:55,103 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:56:55,103 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:56:55,103 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:56:55,116 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-02 14:56:55,277 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2023-04-02 14:56:55,281 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-02 14:56:55,284 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:56:56,210 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15496#(and (<= 1 |#StackHeapBarrier|) (= ~MAX~0 100000) (<= 2 ~SIZE~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~SIZE~0 99999) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:56:56,210 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:56:56,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:56:56,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 27, 20] total 115 [2023-04-02 14:56:56,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465969422] [2023-04-02 14:56:56,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:56:56,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2023-04-02 14:56:56,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:56:56,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2023-04-02 14:56:56,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=713, Invalid=15037, Unknown=0, NotChecked=0, Total=15750 [2023-04-02 14:56:56,212 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand has 115 states, 115 states have (on average 2.2956521739130435) internal successors, (264), 113 states have internal predecessors, (264), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:57:05,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:57:05,052 INFO L93 Difference]: Finished difference Result 372 states and 421 transitions. [2023-04-02 14:57:05,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-04-02 14:57:05,053 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.2956521739130435) internal successors, (264), 113 states have internal predecessors, (264), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2023-04-02 14:57:05,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:57:05,055 INFO L225 Difference]: With dead ends: 372 [2023-04-02 14:57:05,055 INFO L226 Difference]: Without dead ends: 211 [2023-04-02 14:57:05,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 253 SyntacticMatches, 8 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11723 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=1905, Invalid=31037, Unknown=0, NotChecked=0, Total=32942 [2023-04-02 14:57:05,058 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 94 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 6615 mSolverCounterSat, 1279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 7894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1279 IncrementalHoareTripleChecker+Valid, 6615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-04-02 14:57:05,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 295 Invalid, 7894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1279 Valid, 6615 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-04-02 14:57:05,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2023-04-02 14:57:05,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 173. [2023-04-02 14:57:05,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.1369047619047619) internal successors, (191), 168 states have internal predecessors, (191), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:57:05,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 195 transitions. [2023-04-02 14:57:05,162 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 195 transitions. Word has length 98 [2023-04-02 14:57:05,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:57:05,162 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 195 transitions. [2023-04-02 14:57:05,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 2.2956521739130435) internal successors, (264), 113 states have internal predecessors, (264), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:57:05,163 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 195 transitions. [2023-04-02 14:57:05,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-04-02 14:57:05,163 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:57:05,163 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:57:05,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-04-02 14:57:05,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-04-02 14:57:05,369 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:57:05,369 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:57:05,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1270663546, now seen corresponding path program 17 times [2023-04-02 14:57:05,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:57:05,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226017487] [2023-04-02 14:57:05,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:57:05,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:57:05,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:57:05,588 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2023-04-02 14:57:05,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:57:05,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226017487] [2023-04-02 14:57:05,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226017487] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:57:05,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539557972] [2023-04-02 14:57:05,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:57:05,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:57:05,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:57:05,589 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:57:05,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-04-02 14:57:05,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-04-02 14:57:05,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:57:05,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 18 conjunts are in the unsatisfiable core [2023-04-02 14:57:05,738 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:57:05,867 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2023-04-02 14:57:05,867 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:57:06,019 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2023-04-02 14:57:06,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539557972] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:57:06,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1912735308] [2023-04-02 14:57:06,021 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-02 14:57:06,021 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:57:06,021 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:57:06,021 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:57:06,021 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:57:06,035 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-02 14:57:06,234 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2023-04-02 14:57:06,238 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-02 14:57:06,241 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:57:06,584 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17321#(and (<= 1 |#StackHeapBarrier|) (= ~MAX~0 100000) (<= 2 ~SIZE~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~SIZE~0 99999) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:57:06,584 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:57:06,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:57:06,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2023-04-02 14:57:06,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086592427] [2023-04-02 14:57:06,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:57:06,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-04-02 14:57:06,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:57:06,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-04-02 14:57:06,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1322, Unknown=0, NotChecked=0, Total=1560 [2023-04-02 14:57:06,586 INFO L87 Difference]: Start difference. First operand 173 states and 195 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 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) [2023-04-02 14:57:07,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:57:07,103 INFO L93 Difference]: Finished difference Result 251 states and 289 transitions. [2023-04-02 14:57:07,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-02 14:57:07,104 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 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 100 [2023-04-02 14:57:07,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:57:07,104 INFO L225 Difference]: With dead ends: 251 [2023-04-02 14:57:07,104 INFO L226 Difference]: Without dead ends: 110 [2023-04-02 14:57:07,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 264 SyntacticMatches, 16 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=381, Invalid=2069, Unknown=0, NotChecked=0, Total=2450 [2023-04-02 14:57:07,105 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 24 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 1155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 455 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 14:57:07,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 70 Invalid, 1155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [455 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 14:57:07,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-04-02 14:57:07,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2023-04-02 14:57:07,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 105 states have (on average 1.1047619047619048) internal successors, (116), 105 states have internal predecessors, (116), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:57:07,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 120 transitions. [2023-04-02 14:57:07,170 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 120 transitions. Word has length 100 [2023-04-02 14:57:07,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:57:07,170 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 120 transitions. [2023-04-02 14:57:07,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 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) [2023-04-02 14:57:07,170 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 120 transitions. [2023-04-02 14:57:07,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-04-02 14:57:07,171 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:57:07,171 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:57:07,178 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-04-02 14:57:07,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:57:07,381 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:57:07,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:57:07,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1944513630, now seen corresponding path program 18 times [2023-04-02 14:57:07,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:57:07,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069212727] [2023-04-02 14:57:07,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:57:07,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:57:07,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:57:24,481 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 32 proven. 364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:57:24,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:57:24,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069212727] [2023-04-02 14:57:24,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069212727] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:57:24,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680854218] [2023-04-02 14:57:24,482 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:57:24,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:57:24,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:57:24,483 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:57:24,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-04-02 14:57:24,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:57:24,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:57:24,628 WARN L260 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 332 conjunts are in the unsatisfiable core [2023-04-02 14:57:24,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:57:26,342 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 360 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-02 14:57:26,342 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:57:28,850 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 14:57:28,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 137 treesize of output 589 [2023-04-02 14:57:39,229 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 360 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-02 14:57:39,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680854218] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:57:39,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1395139448] [2023-04-02 14:57:39,230 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-02 14:57:39,231 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:57:39,231 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:57:39,231 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:57:39,231 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:57:39,246 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-02 14:57:39,394 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2023-04-02 14:57:39,397 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-02 14:57:39,400 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:57:40,494 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18831#(and (<= 1 |#StackHeapBarrier|) (= ~MAX~0 100000) (<= 2 ~SIZE~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~SIZE~0 99999) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:57:40,495 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:57:40,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:57:40,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 23, 23] total 119 [2023-04-02 14:57:40,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955577367] [2023-04-02 14:57:40,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:57:40,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2023-04-02 14:57:40,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:57:40,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2023-04-02 14:57:40,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=773, Invalid=15997, Unknown=0, NotChecked=0, Total=16770 [2023-04-02 14:57:40,498 INFO L87 Difference]: Start difference. First operand 110 states and 120 transitions. Second operand has 119 states, 119 states have (on average 2.4453781512605044) internal successors, (291), 117 states have internal predecessors, (291), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:57:55,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:57:55,632 INFO L93 Difference]: Finished difference Result 536 states and 607 transitions. [2023-04-02 14:57:55,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2023-04-02 14:57:55,632 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.4453781512605044) internal successors, (291), 117 states have internal predecessors, (291), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 109 [2023-04-02 14:57:55,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:57:55,634 INFO L225 Difference]: With dead ends: 536 [2023-04-02 14:57:55,634 INFO L226 Difference]: Without dead ends: 473 [2023-04-02 14:57:55,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 298 SyntacticMatches, 3 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15403 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=3603, Invalid=45903, Unknown=0, NotChecked=0, Total=49506 [2023-04-02 14:57:55,636 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 274 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 9588 mSolverCounterSat, 2979 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 12567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2979 IncrementalHoareTripleChecker+Valid, 9588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2023-04-02 14:57:55,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 326 Invalid, 12567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2979 Valid, 9588 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2023-04-02 14:57:55,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2023-04-02 14:57:55,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 311. [2023-04-02 14:57:55,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 306 states have (on average 1.130718954248366) internal successors, (346), 306 states have internal predecessors, (346), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:57:55,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 350 transitions. [2023-04-02 14:57:55,880 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 350 transitions. Word has length 109 [2023-04-02 14:57:55,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:57:55,880 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 350 transitions. [2023-04-02 14:57:55,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.4453781512605044) internal successors, (291), 117 states have internal predecessors, (291), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:57:55,880 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 350 transitions. [2023-04-02 14:57:55,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-04-02 14:57:55,881 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:57:55,881 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:57:55,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-04-02 14:57:56,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:57:56,087 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:57:56,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:57:56,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1342303811, now seen corresponding path program 19 times [2023-04-02 14:57:56,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:57:56,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403943687] [2023-04-02 14:57:56,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:57:56,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:57:56,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:57:56,442 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 37 proven. 44 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2023-04-02 14:57:56,442 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:57:56,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403943687] [2023-04-02 14:57:56,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403943687] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:57:56,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978423153] [2023-04-02 14:57:56,442 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:57:56,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:57:56,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:57:56,443 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:57:56,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-04-02 14:57:56,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:57:56,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 20 conjunts are in the unsatisfiable core [2023-04-02 14:57:56,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:57:56,801 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2023-04-02 14:57:56,802 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:57:56,987 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2023-04-02 14:57:56,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978423153] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:57:56,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1455068397] [2023-04-02 14:57:56,988 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-02 14:57:56,988 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:57:56,988 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:57:56,988 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:57:56,988 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:57:57,026 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-02 14:57:57,248 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2023-04-02 14:57:57,251 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-02 14:57:57,254 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:57:57,646 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21397#(and (<= 1 |#StackHeapBarrier|) (= ~MAX~0 100000) (<= 2 ~SIZE~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~SIZE~0 99999) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:57:57,646 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:57:57,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:57:57,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2023-04-02 14:57:57,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343122988] [2023-04-02 14:57:57,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:57:57,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-04-02 14:57:57,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:57:57,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-04-02 14:57:57,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=1519, Unknown=0, NotChecked=0, Total=1806 [2023-04-02 14:57:57,647 INFO L87 Difference]: Start difference. First operand 311 states and 350 transitions. Second operand has 32 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 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) [2023-04-02 14:57:58,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:57:58,266 INFO L93 Difference]: Finished difference Result 539 states and 606 transitions. [2023-04-02 14:57:58,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-02 14:57:58,267 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 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 110 [2023-04-02 14:57:58,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:57:58,267 INFO L225 Difference]: With dead ends: 539 [2023-04-02 14:57:58,267 INFO L226 Difference]: Without dead ends: 126 [2023-04-02 14:57:58,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 292 SyntacticMatches, 17 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=449, Invalid=2203, Unknown=0, NotChecked=0, Total=2652 [2023-04-02 14:57:58,269 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 10 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 695 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 695 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 14:57:58,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 51 Invalid, 1337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [695 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 14:57:58,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-04-02 14:57:58,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 120. [2023-04-02 14:57:58,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 115 states have (on average 1.0956521739130434) internal successors, (126), 115 states have internal predecessors, (126), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:57:58,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 130 transitions. [2023-04-02 14:57:58,350 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 130 transitions. Word has length 110 [2023-04-02 14:57:58,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:57:58,350 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 130 transitions. [2023-04-02 14:57:58,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 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) [2023-04-02 14:57:58,350 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 130 transitions. [2023-04-02 14:57:58,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-04-02 14:57:58,351 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:57:58,351 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:57:58,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-04-02 14:57:58,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:57:58,554 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:57:58,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:57:58,554 INFO L85 PathProgramCache]: Analyzing trace with hash 351436996, now seen corresponding path program 20 times [2023-04-02 14:57:58,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:57:58,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12981023] [2023-04-02 14:57:58,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:57:58,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:57:58,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:57:58,781 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 28 proven. 53 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2023-04-02 14:57:58,781 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:57:58,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12981023] [2023-04-02 14:57:58,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12981023] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:57:58,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960918938] [2023-04-02 14:57:58,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:57:58,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:57:58,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:57:58,782 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:57:58,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-04-02 14:57:58,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-04-02 14:57:58,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:57:58,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 20 conjunts are in the unsatisfiable core [2023-04-02 14:57:58,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:57:59,067 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2023-04-02 14:57:59,067 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:57:59,161 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2023-04-02 14:57:59,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960918938] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:57:59,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1274457690] [2023-04-02 14:57:59,162 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-02 14:57:59,162 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:57:59,162 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:57:59,162 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:57:59,162 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:57:59,178 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-02 14:57:59,354 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2023-04-02 14:57:59,357 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-02 14:57:59,360 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:57:59,595 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23471#(and (<= 1 |#StackHeapBarrier|) (= ~MAX~0 100000) (<= 2 ~SIZE~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~SIZE~0 99999) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:57:59,595 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:57:59,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:57:59,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2023-04-02 14:57:59,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952296233] [2023-04-02 14:57:59,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:57:59,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-04-02 14:57:59,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:57:59,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-04-02 14:57:59,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=1526, Unknown=0, NotChecked=0, Total=1806 [2023-04-02 14:57:59,597 INFO L87 Difference]: Start difference. First operand 120 states and 130 transitions. Second operand has 32 states, 32 states have (on average 2.46875) internal successors, (79), 32 states have internal predecessors, (79), 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) [2023-04-02 14:58:00,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:58:00,001 INFO L93 Difference]: Finished difference Result 126 states and 136 transitions. [2023-04-02 14:58:00,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-02 14:58:00,003 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 32 states have internal predecessors, (79), 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 119 [2023-04-02 14:58:00,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:58:00,004 INFO L225 Difference]: With dead ends: 126 [2023-04-02 14:58:00,004 INFO L226 Difference]: Without dead ends: 121 [2023-04-02 14:58:00,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 327 SyntacticMatches, 18 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1303 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=453, Invalid=2409, Unknown=0, NotChecked=0, Total=2862 [2023-04-02 14:58:00,004 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 10 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 480 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 480 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 14:58:00,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 46 Invalid, 1296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [480 Valid, 816 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 14:58:00,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-04-02 14:58:00,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2023-04-02 14:58:00,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.0948275862068966) internal successors, (127), 116 states have internal predecessors, (127), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:58:00,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 131 transitions. [2023-04-02 14:58:00,087 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 131 transitions. Word has length 119 [2023-04-02 14:58:00,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:58:00,087 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 131 transitions. [2023-04-02 14:58:00,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 32 states have internal predecessors, (79), 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) [2023-04-02 14:58:00,088 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 131 transitions. [2023-04-02 14:58:00,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-04-02 14:58:00,088 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:58:00,088 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:58:00,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-04-02 14:58:00,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-04-02 14:58:00,294 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:58:00,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:58:00,294 INFO L85 PathProgramCache]: Analyzing trace with hash -2139640475, now seen corresponding path program 21 times [2023-04-02 14:58:00,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:58:00,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514839896] [2023-04-02 14:58:00,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:58:00,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:58:00,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:58:23,354 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 45 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:58:23,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:58:23,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514839896] [2023-04-02 14:58:23,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514839896] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:58:23,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766260740] [2023-04-02 14:58:23,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:58:23,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:58:23,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:58:23,355 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:58:23,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-04-02 14:58:23,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:58:23,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:58:23,518 WARN L260 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 370 conjunts are in the unsatisfiable core [2023-04-02 14:58:23,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:58:25,165 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-04-02 14:58:25,165 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:58:28,301 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 14:58:28,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 18 select indices, 18 select index equivalence classes, 0 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 153 case distinctions, treesize of input 155 treesize of output 744 [2023-04-02 14:58:40,129 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-04-02 14:58:40,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766260740] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:58:40,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2132857964] [2023-04-02 14:58:40,130 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-02 14:58:40,131 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:58:40,131 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:58:40,131 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:58:40,131 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:58:40,162 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-02 14:58:40,342 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2023-04-02 14:58:40,346 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-02 14:58:40,349 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:58:41,544 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24848#(and (<= 1 |#StackHeapBarrier|) (= ~MAX~0 100000) (<= 2 ~SIZE~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~SIZE~0 99999) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:58:41,545 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:58:41,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:58:41,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 25, 25] total 137 [2023-04-02 14:58:41,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214276215] [2023-04-02 14:58:41,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:58:41,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2023-04-02 14:58:41,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:58:41,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2023-04-02 14:58:41,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=823, Invalid=20933, Unknown=0, NotChecked=0, Total=21756 [2023-04-02 14:58:41,547 INFO L87 Difference]: Start difference. First operand 121 states and 131 transitions. Second operand has 137 states, 137 states have (on average 2.3503649635036497) internal successors, (322), 135 states have internal predecessors, (322), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:58:57,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:58:57,906 INFO L93 Difference]: Finished difference Result 543 states and 604 transitions. [2023-04-02 14:58:57,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2023-04-02 14:58:57,906 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 2.3503649635036497) internal successors, (322), 135 states have internal predecessors, (322), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 120 [2023-04-02 14:58:57,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:58:57,908 INFO L225 Difference]: With dead ends: 543 [2023-04-02 14:58:57,908 INFO L226 Difference]: Without dead ends: 343 [2023-04-02 14:58:57,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 536 GetRequests, 321 SyntacticMatches, 6 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14220 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=2403, Invalid=41907, Unknown=0, NotChecked=0, Total=44310 [2023-04-02 14:58:57,910 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 107 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 12114 mSolverCounterSat, 1535 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 13649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1535 IncrementalHoareTripleChecker+Valid, 12114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2023-04-02 14:58:57,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 314 Invalid, 13649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1535 Valid, 12114 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2023-04-02 14:58:57,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2023-04-02 14:58:58,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 271. [2023-04-02 14:58:58,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 266 states have (on average 1.112781954887218) internal successors, (296), 266 states have internal predecessors, (296), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:58:58,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 300 transitions. [2023-04-02 14:58:58,170 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 300 transitions. Word has length 120 [2023-04-02 14:58:58,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:58:58,170 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 300 transitions. [2023-04-02 14:58:58,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 2.3503649635036497) internal successors, (322), 135 states have internal predecessors, (322), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:58:58,170 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 300 transitions. [2023-04-02 14:58:58,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-04-02 14:58:58,171 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:58:58,171 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:58:58,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-04-02 14:58:58,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-04-02 14:58:58,377 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:58:58,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:58:58,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1873007947, now seen corresponding path program 22 times [2023-04-02 14:58:58,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:58:58,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901776521] [2023-04-02 14:58:58,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:58:58,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:58:58,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:58:58,689 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 36 proven. 64 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2023-04-02 14:58:58,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:58:58,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901776521] [2023-04-02 14:58:58,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901776521] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:58:58,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380689727] [2023-04-02 14:58:58,689 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:58:58,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:58:58,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:58:58,690 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:58:58,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-04-02 14:58:58,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:58:58,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 22 conjunts are in the unsatisfiable core [2023-04-02 14:58:58,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:58:58,983 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2023-04-02 14:58:58,984 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:58:59,143 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2023-04-02 14:58:59,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380689727] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:58:59,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1269321999] [2023-04-02 14:58:59,144 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-02 14:58:59,144 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:58:59,144 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:58:59,144 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:58:59,144 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:58:59,157 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-02 14:58:59,300 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2023-04-02 14:58:59,303 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-02 14:58:59,306 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:58:59,672 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27363#(and (<= 1 |#StackHeapBarrier|) (= ~MAX~0 100000) (<= 2 ~SIZE~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~SIZE~0 99999) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:58:59,673 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:58:59,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:58:59,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2023-04-02 14:58:59,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432609149] [2023-04-02 14:58:59,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:58:59,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-04-02 14:58:59,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:58:59,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-04-02 14:58:59,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=1744, Unknown=0, NotChecked=0, Total=2070 [2023-04-02 14:58:59,674 INFO L87 Difference]: Start difference. First operand 271 states and 300 transitions. Second operand has 35 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 35 states have internal predecessors, (60), 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) [2023-04-02 14:59:00,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:59:00,352 INFO L93 Difference]: Finished difference Result 365 states and 410 transitions. [2023-04-02 14:59:00,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-02 14:59:00,352 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 35 states have internal predecessors, (60), 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 122 [2023-04-02 14:59:00,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:59:00,353 INFO L225 Difference]: With dead ends: 365 [2023-04-02 14:59:00,353 INFO L226 Difference]: Without dead ends: 132 [2023-04-02 14:59:00,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 324 SyntacticMatches, 20 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1535 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=532, Invalid=2774, Unknown=0, NotChecked=0, Total=3306 [2023-04-02 14:59:00,354 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 27 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 569 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 1476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 569 IncrementalHoareTripleChecker+Valid, 907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 14:59:00,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 74 Invalid, 1476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [569 Valid, 907 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 14:59:00,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-04-02 14:59:00,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2023-04-02 14:59:00,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 127 states have (on average 1.0866141732283465) internal successors, (138), 127 states have internal predecessors, (138), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:59:00,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 142 transitions. [2023-04-02 14:59:00,455 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 142 transitions. Word has length 122 [2023-04-02 14:59:00,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:59:00,455 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 142 transitions. [2023-04-02 14:59:00,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 35 states have internal predecessors, (60), 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) [2023-04-02 14:59:00,455 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 142 transitions. [2023-04-02 14:59:00,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-04-02 14:59:00,456 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:59:00,456 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:59:00,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-04-02 14:59:00,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:59:00,661 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:59:00,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:59:00,661 INFO L85 PathProgramCache]: Analyzing trace with hash -854044862, now seen corresponding path program 23 times [2023-04-02 14:59:00,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:59:00,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696481188] [2023-04-02 14:59:00,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:59:00,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:59:01,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat