/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 IntervalDomain -i ../sv-benchmarks/c/loops/linear_search.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:58:04,541 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:58:04,542 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:58:04,572 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:58:04,574 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:58:04,576 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:58:04,579 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:58:04,581 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:58:04,582 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:58:04,587 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:58:04,588 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:58:04,589 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:58:04,590 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:58:04,593 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:58:04,594 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:58:04,595 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:58:04,596 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:58:04,597 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:58:04,598 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:58:04,603 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:58:04,604 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:58:04,605 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:58:04,606 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:58:04,607 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:58:04,615 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:58:04,615 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:58:04,615 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:58:04,616 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:58:04,616 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:58:04,617 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:58:04,617 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:58:04,618 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:58:04,619 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:58:04,620 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:58:04,620 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:58:04,620 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:58:04,621 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:58:04,621 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:58:04,621 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:58:04,622 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:58:04,622 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:58:04,623 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 [2023-03-31 22:58:04,651 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:58:04,651 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:58:04,652 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:58:04,652 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:58:04,652 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:58:04,652 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:58:04,653 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:58:04,653 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:58:04,653 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:58:04,653 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:58:04,654 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:58:04,654 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:58:04,654 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:58:04,654 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:58:04,654 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:58:04,654 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:58:04,654 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:58:04,654 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:58:04,655 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:58:04,655 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:58:04,655 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:58:04,655 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:58:04,655 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:58:04,655 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:58:04,656 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:58:04,656 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:58:04,656 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:58:04,656 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:58:04,656 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:58:04,656 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:58:04,656 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:58:04,657 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:58:04,657 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:58:04,657 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:58:04,657 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:58:04,657 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:58:04,657 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:58:04,657 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:58:04,657 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:58:04,658 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:58:04,658 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:58:04,658 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:58:04,859 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:58:04,879 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:58:04,881 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:58:04,882 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:58:04,882 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:58:04,883 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/linear_search.c [2023-03-31 22:58:05,965 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:58:06,123 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:58:06,123 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/linear_search.c [2023-03-31 22:58:06,128 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7546e64d/0b316d20760f43aa8a394b3a85ea7cc4/FLAG51d6170b5 [2023-03-31 22:58:06,137 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7546e64d/0b316d20760f43aa8a394b3a85ea7cc4 [2023-03-31 22:58:06,139 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:58:06,140 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:58:06,141 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:58:06,141 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:58:06,143 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:58:06,144 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:58:06" (1/1) ... [2023-03-31 22:58:06,145 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@622c5149 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:58:06, skipping insertion in model container [2023-03-31 22:58:06,145 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:58:06" (1/1) ... [2023-03-31 22:58:06,151 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:58:06,160 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:58:06,259 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/loops/linear_search.c[383,396] [2023-03-31 22:58:06,276 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:58:06,283 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:58:06,293 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/loops/linear_search.c[383,396] [2023-03-31 22:58:06,306 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:58:06,315 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:58:06,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:58:06 WrapperNode [2023-03-31 22:58:06,316 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:58:06,317 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:58:06,317 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:58:06,317 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:58:06,324 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:58:06" (1/1) ... [2023-03-31 22:58:06,324 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:58:06" (1/1) ... [2023-03-31 22:58:06,330 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:58:06" (1/1) ... [2023-03-31 22:58:06,330 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:58:06" (1/1) ... [2023-03-31 22:58:06,335 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:58:06" (1/1) ... [2023-03-31 22:58:06,337 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:58:06" (1/1) ... [2023-03-31 22:58:06,338 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:58:06" (1/1) ... [2023-03-31 22:58:06,339 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:58:06" (1/1) ... [2023-03-31 22:58:06,343 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:58:06,344 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:58:06,344 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:58:06,344 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:58:06,345 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:58:06" (1/1) ... [2023-03-31 22:58:06,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:58:06,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:58:06,368 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) [2023-03-31 22:58:06,374 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 [2023-03-31 22:58:06,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:58:06,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:58:06,397 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:58:06,397 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 22:58:06,397 INFO L138 BoogieDeclarations]: Found implementation of procedure linear_search [2023-03-31 22:58:06,397 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:58:06,397 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-03-31 22:58:06,397 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:58:06,397 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:58:06,397 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:58:06,398 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:58:06,398 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-03-31 22:58:06,398 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 22:58:06,398 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-03-31 22:58:06,398 INFO L130 BoogieDeclarations]: Found specification of procedure linear_search [2023-03-31 22:58:06,398 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:58:06,398 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:58:06,398 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-03-31 22:58:06,398 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-03-31 22:58:06,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:58:06,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:58:06,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:58:06,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:58:06,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:58:06,475 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:58:06,477 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:58:06,716 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:58:06,790 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:58:06,790 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:58:06,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:58:06 BoogieIcfgContainer [2023-03-31 22:58:06,792 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:58:06,794 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:58:06,794 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:58:06,804 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:58:06,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:58:06" (1/3) ... [2023-03-31 22:58:06,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70a01eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:58:06, skipping insertion in model container [2023-03-31 22:58:06,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:58:06" (2/3) ... [2023-03-31 22:58:06,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70a01eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:58:06, skipping insertion in model container [2023-03-31 22:58:06,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:58:06" (3/3) ... [2023-03-31 22:58:06,807 INFO L112 eAbstractionObserver]: Analyzing ICFG linear_search.c [2023-03-31 22:58:06,822 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:58:06,822 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:58:06,875 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:58:06,882 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;@5c3f9443, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:58:06,882 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:58:06,885 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 22:58:06,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-03-31 22:58:06,894 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:58:06,895 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:58:06,896 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:58:06,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:58:06,902 INFO L85 PathProgramCache]: Analyzing trace with hash -757449597, now seen corresponding path program 1 times [2023-03-31 22:58:06,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:58:06,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063621930] [2023-03-31 22:58:06,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:58:06,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:58:07,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:58:07,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:58:07,142 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:58:07,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063621930] [2023-03-31 22:58:07,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063621930] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:58:07,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:58:07,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-03-31 22:58:07,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116036905] [2023-03-31 22:58:07,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:58:07,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-03-31 22:58:07,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:58:07,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-03-31 22:58:07,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 22:58:07,191 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 22:58:07,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:58:07,244 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2023-03-31 22:58:07,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-03-31 22:58:07,247 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 20 [2023-03-31 22:58:07,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:58:07,252 INFO L225 Difference]: With dead ends: 44 [2023-03-31 22:58:07,252 INFO L226 Difference]: Without dead ends: 22 [2023-03-31 22:58:07,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 22:58:07,258 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:58:07,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 22:58:07,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-03-31 22:58:07,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-03-31 22:58:07,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:58:07,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2023-03-31 22:58:07,293 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2023-03-31 22:58:07,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:58:07,294 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2023-03-31 22:58:07,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 22:58:07,296 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2023-03-31 22:58:07,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-03-31 22:58:07,297 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:58:07,297 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] [2023-03-31 22:58:07,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:58:07,298 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:58:07,299 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:58:07,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1188193484, now seen corresponding path program 1 times [2023-03-31 22:58:07,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:58:07,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629607618] [2023-03-31 22:58:07,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:58:07,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:58:07,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:58:07,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:58:07,776 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:58:07,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629607618] [2023-03-31 22:58:07,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629607618] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:58:07,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:58:07,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-03-31 22:58:07,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833348746] [2023-03-31 22:58:07,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:58:07,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 22:58:07,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:58:07,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 22:58:07,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:58:07,785 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 22:58:07,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:58:07,966 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2023-03-31 22:58:07,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 22:58:07,967 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2023-03-31 22:58:07,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:58:07,968 INFO L225 Difference]: With dead ends: 32 [2023-03-31 22:58:07,968 INFO L226 Difference]: Without dead ends: 24 [2023-03-31 22:58:07,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-03-31 22:58:07,975 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 22 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:58:07,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 72 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 22:58:07,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-03-31 22:58:07,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-03-31 22:58:07,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:58:07,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2023-03-31 22:58:07,982 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2023-03-31 22:58:07,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:58:07,983 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2023-03-31 22:58:07,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 22:58:07,983 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2023-03-31 22:58:07,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-03-31 22:58:07,983 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:58:07,984 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] [2023-03-31 22:58:07,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:58:07,984 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:58:07,984 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:58:07,984 INFO L85 PathProgramCache]: Analyzing trace with hash -427023574, now seen corresponding path program 1 times [2023-03-31 22:58:07,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:58:07,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497627499] [2023-03-31 22:58:07,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:58:07,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:58:08,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:58:08,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:58:08,380 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:58:08,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497627499] [2023-03-31 22:58:08,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497627499] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:58:08,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374664477] [2023-03-31 22:58:08,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:58:08,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:58:08,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:58:08,383 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) [2023-03-31 22:58:08,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 22:58:08,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:58:08,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 13 conjunts are in the unsatisfiable core [2023-03-31 22:58:08,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:58:08,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:58:08,629 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:58:08,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:58:08,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374664477] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:58:08,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1507663915] [2023-03-31 22:58:08,974 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-03-31 22:58:08,974 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:58:08,977 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:58:08,981 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:58:08,982 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:58:09,058 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-03-31 22:58:09,462 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2023-03-31 22:58:09,470 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 57 for LOIs [2023-03-31 22:58:09,483 INFO L197 IcfgInterpreter]: Interpreting procedure linear_search with input of size 53 for LOIs [2023-03-31 22:58:09,780 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-03-31 22:58:09,787 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 22:58:11,001 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '377#(and (= ~MAX~0 100000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 22:58:11,001 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 22:58:11,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 22:58:11,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-03-31 22:58:11,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275975227] [2023-03-31 22:58:11,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 22:58:11,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-03-31 22:58:11,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:58:11,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-03-31 22:58:11,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1278, Unknown=6, NotChecked=0, Total=1406 [2023-03-31 22:58:11,004 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 18 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 4 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2023-03-31 22:58:11,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:58:11,271 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2023-03-31 22:58:11,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-31 22:58:11,271 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 4 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 23 [2023-03-31 22:58:11,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:58:11,272 INFO L225 Difference]: With dead ends: 34 [2023-03-31 22:58:11,272 INFO L226 Difference]: Without dead ends: 26 [2023-03-31 22:58:11,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=158, Invalid=1642, Unknown=6, NotChecked=0, Total=1806 [2023-03-31 22:58:11,274 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:58:11,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 104 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 22:58:11,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-03-31 22:58:11,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-03-31 22:58:11,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:58:11,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2023-03-31 22:58:11,279 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2023-03-31 22:58:11,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:58:11,280 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2023-03-31 22:58:11,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 4 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2023-03-31 22:58:11,280 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2023-03-31 22:58:11,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-03-31 22:58:11,280 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:58:11,281 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:58:11,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 22:58:11,481 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 [2023-03-31 22:58:11,482 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:58:11,482 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:58:11,482 INFO L85 PathProgramCache]: Analyzing trace with hash 2127544840, now seen corresponding path program 2 times [2023-03-31 22:58:11,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:58:11,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408811013] [2023-03-31 22:58:11,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:58:11,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:58:11,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:58:12,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:58:12,739 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:58:12,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408811013] [2023-03-31 22:58:12,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408811013] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:58:12,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508512939] [2023-03-31 22:58:12,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 22:58:12,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:58:12,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:58:12,745 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) [2023-03-31 22:58:12,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 22:58:12,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-31 22:58:12,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 22:58:12,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 49 conjunts are in the unsatisfiable core [2023-03-31 22:58:12,864 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:58:12,937 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 7 treesize of output 6 [2023-03-31 22:58:13,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 64 [2023-03-31 22:58:13,996 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 22:58:13,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 58 [2023-03-31 22:58:14,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:58:14,031 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:58:16,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:58:16,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508512939] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:58:16,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1447269833] [2023-03-31 22:58:16,043 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-03-31 22:58:16,043 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:58:16,044 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:58:16,044 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:58:16,044 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:58:16,072 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-03-31 22:58:16,289 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2023-03-31 22:58:16,293 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 57 for LOIs [2023-03-31 22:58:16,298 INFO L197 IcfgInterpreter]: Interpreting procedure linear_search with input of size 53 for LOIs [2023-03-31 22:58:16,461 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-03-31 22:58:16,466 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 22:58:18,033 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '680#(and (= ~MAX~0 100000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 22:58:18,034 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 22:58:18,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 22:58:18,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18, 13] total 38 [2023-03-31 22:58:18,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46434163] [2023-03-31 22:58:18,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 22:58:18,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-03-31 22:58:18,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:58:18,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-03-31 22:58:18,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=3052, Unknown=6, NotChecked=0, Total=3306 [2023-03-31 22:58:18,037 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand has 38 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 34 states have internal predecessors, (45), 10 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2023-03-31 22:58:19,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:58:19,730 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2023-03-31 22:58:19,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-03-31 22:58:19,731 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 34 states have internal predecessors, (45), 10 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 25 [2023-03-31 22:58:19,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:58:19,731 INFO L225 Difference]: With dead ends: 36 [2023-03-31 22:58:19,731 INFO L226 Difference]: Without dead ends: 28 [2023-03-31 22:58:19,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1278 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=468, Invalid=5076, Unknown=6, NotChecked=0, Total=5550 [2023-03-31 22:58:19,734 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 55 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-31 22:58:19,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 112 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-31 22:58:19,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-03-31 22:58:19,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-03-31 22:58:19,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:58:19,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2023-03-31 22:58:19,741 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2023-03-31 22:58:19,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:58:19,741 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2023-03-31 22:58:19,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 34 states have internal predecessors, (45), 10 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2023-03-31 22:58:19,742 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2023-03-31 22:58:19,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-03-31 22:58:19,742 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:58:19,742 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:58:19,750 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-03-31 22:58:19,948 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 [2023-03-31 22:58:19,948 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:58:19,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:58:19,949 INFO L85 PathProgramCache]: Analyzing trace with hash 346497382, now seen corresponding path program 3 times [2023-03-31 22:58:19,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:58:19,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192647924] [2023-03-31 22:58:19,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:58:19,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:58:20,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:58:21,561 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:58:21,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:58:21,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192647924] [2023-03-31 22:58:21,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192647924] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:58:21,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410587401] [2023-03-31 22:58:21,562 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 22:58:21,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:58:21,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:58:21,563 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) [2023-03-31 22:58:21,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 22:58:21,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 22:58:21,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 22:58:21,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 51 conjunts are in the unsatisfiable core [2023-03-31 22:58:21,762 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:58:21,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 60 [2023-03-31 22:58:21,833 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-03-31 22:58:21,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2023-03-31 22:58:23,868 INFO L321 Elim1Store]: treesize reduction 37, result has 58.4 percent of original size [2023-03-31 22:58:23,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 51 treesize of output 70 [2023-03-31 22:58:23,906 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:58:23,906 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:58:27,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 56 [2023-03-31 22:58:27,308 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2023-03-31 22:58:27,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 1 [2023-03-31 22:58:27,316 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:58:27,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410587401] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:58:27,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1266418861] [2023-03-31 22:58:27,318 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-03-31 22:58:27,318 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:58:27,318 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:58:27,318 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:58:27,318 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:58:27,335 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-03-31 22:58:27,513 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2023-03-31 22:58:27,520 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 57 for LOIs [2023-03-31 22:58:27,526 INFO L197 IcfgInterpreter]: Interpreting procedure linear_search with input of size 53 for LOIs [2023-03-31 22:58:27,642 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-03-31 22:58:27,648 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 22:58:29,788 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1027#(and (= ~MAX~0 100000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 22:58:29,789 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 22:58:29,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 22:58:29,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 14] total 39 [2023-03-31 22:58:29,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374991833] [2023-03-31 22:58:29,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 22:58:29,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-03-31 22:58:29,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:58:29,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-03-31 22:58:29,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=3155, Unknown=7, NotChecked=0, Total=3422 [2023-03-31 22:58:29,791 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 39 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 36 states have internal predecessors, (51), 10 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2023-03-31 22:58:34,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:58:34,807 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2023-03-31 22:58:34,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-03-31 22:58:34,807 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 36 states have internal predecessors, (51), 10 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 27 [2023-03-31 22:58:34,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:58:34,808 INFO L225 Difference]: With dead ends: 38 [2023-03-31 22:58:34,808 INFO L226 Difference]: Without dead ends: 30 [2023-03-31 22:58:34,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1407 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=462, Invalid=5079, Unknown=9, NotChecked=0, Total=5550 [2023-03-31 22:58:34,811 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 17 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-03-31 22:58:34,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 136 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 479 Invalid, 2 Unknown, 0 Unchecked, 2.2s Time] [2023-03-31 22:58:34,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-03-31 22:58:34,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-03-31 22:58:34,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:58:34,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2023-03-31 22:58:34,818 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2023-03-31 22:58:34,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:58:34,818 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2023-03-31 22:58:34,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 36 states have internal predecessors, (51), 10 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2023-03-31 22:58:34,818 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2023-03-31 22:58:34,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-03-31 22:58:34,819 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:58:34,819 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:58:34,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 22:58:35,024 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 [2023-03-31 22:58:35,025 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:58:35,025 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:58:35,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1843125948, now seen corresponding path program 4 times [2023-03-31 22:58:35,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:58:35,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828983403] [2023-03-31 22:58:35,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:58:35,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:58:35,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:58:41,848 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:58:41,848 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:58:41,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828983403] [2023-03-31 22:58:41,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828983403] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:58:41,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253563761] [2023-03-31 22:58:41,849 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 22:58:41,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:58:41,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:58:41,851 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) [2023-03-31 22:58:41,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 22:58:42,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:58:42,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 60 conjunts are in the unsatisfiable core [2023-03-31 22:58:42,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:58:42,142 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 7 treesize of output 6 [2023-03-31 22:58:42,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 64 [2023-03-31 22:58:44,255 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 22:58:44,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 80 [2023-03-31 22:58:44,297 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:58:44,297 INFO L327 TraceCheckSpWp]: Computing backward predicates...