/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-cav19/array_init_pair_sum_const.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 02:58:09,402 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 02:58:09,404 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 02:58:09,441 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 02:58:09,442 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 02:58:09,444 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 02:58:09,447 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 02:58:09,453 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 02:58:09,457 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 02:58:09,461 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 02:58:09,462 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 02:58:09,464 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 02:58:09,464 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 02:58:09,466 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 02:58:09,467 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 02:58:09,468 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 02:58:09,469 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 02:58:09,470 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 02:58:09,472 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 02:58:09,477 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 02:58:09,478 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 02:58:09,479 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 02:58:09,480 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 02:58:09,481 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 02:58:09,488 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 02:58:09,488 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 02:58:09,489 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 02:58:09,490 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 02:58:09,490 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 02:58:09,491 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 02:58:09,491 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 02:58:09,492 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 02:58:09,493 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 02:58:09,493 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 02:58:09,494 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 02:58:09,494 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 02:58:09,494 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 02:58:09,495 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 02:58:09,495 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 02:58:09,495 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 02:58:09,496 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 02:58:09,497 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 02:58:09,525 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 02:58:09,526 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 02:58:09,526 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 02:58:09,526 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 02:58:09,527 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 02:58:09,527 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 02:58:09,527 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 02:58:09,527 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 02:58:09,528 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 02:58:09,528 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 02:58:09,528 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 02:58:09,529 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 02:58:09,529 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 02:58:09,529 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 02:58:09,529 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 02:58:09,529 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 02:58:09,529 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 02:58:09,529 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 02:58:09,530 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 02:58:09,530 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 02:58:09,530 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 02:58:09,530 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 02:58:09,531 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 02:58:09,531 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 02:58:09,531 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 02:58:09,531 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 02:58:09,532 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 02:58:09,532 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 02:58:09,532 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 02:58:09,532 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 02:58:09,532 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 02:58:09,532 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 02:58:09,533 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 02:58:09,533 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 02:58:09,533 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 02:58:09,533 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 02:58:09,533 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 02:58:09,533 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 02:58:09,533 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 02:58:09,534 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 02:58:09,534 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 02:58:09,534 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 02:58:09,776 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 02:58:09,803 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 02:58:09,805 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 02:58:09,806 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 02:58:09,806 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 02:58:09,807 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_init_pair_sum_const.c [2023-04-01 02:58:11,043 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 02:58:11,206 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 02:58:11,207 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_pair_sum_const.c [2023-04-01 02:58:11,212 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61c4ac4c2/97714cb5147842018003cfe742d49039/FLAGa8dcddadc [2023-04-01 02:58:11,226 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61c4ac4c2/97714cb5147842018003cfe742d49039 [2023-04-01 02:58:11,228 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 02:58:11,229 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 02:58:11,232 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 02:58:11,232 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 02:58:11,235 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 02:58:11,235 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 02:58:11" (1/1) ... [2023-04-01 02:58:11,236 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@346392b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:58:11, skipping insertion in model container [2023-04-01 02:58:11,237 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 02:58:11" (1/1) ... [2023-04-01 02:58:11,242 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 02:58:11,254 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 02:58:11,362 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-cav19/array_init_pair_sum_const.c[416,429] [2023-04-01 02:58:11,374 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 02:58:11,380 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 02:58:11,389 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-cav19/array_init_pair_sum_const.c[416,429] [2023-04-01 02:58:11,395 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 02:58:11,407 INFO L208 MainTranslator]: Completed translation [2023-04-01 02:58:11,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:58:11 WrapperNode [2023-04-01 02:58:11,408 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 02:58:11,409 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 02:58:11,409 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 02:58:11,409 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 02:58:11,417 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:58:11" (1/1) ... [2023-04-01 02:58:11,417 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:58:11" (1/1) ... [2023-04-01 02:58:11,421 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:58:11" (1/1) ... [2023-04-01 02:58:11,422 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:58:11" (1/1) ... [2023-04-01 02:58:11,427 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:58:11" (1/1) ... [2023-04-01 02:58:11,430 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:58:11" (1/1) ... [2023-04-01 02:58:11,431 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:58:11" (1/1) ... [2023-04-01 02:58:11,432 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:58:11" (1/1) ... [2023-04-01 02:58:11,433 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 02:58:11,434 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 02:58:11,434 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 02:58:11,434 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 02:58:11,435 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:58:11" (1/1) ... [2023-04-01 02:58:11,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 02:58:11,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:58:11,462 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 02:58:11,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 02:58:11,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 02:58:11,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 02:58:11,492 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 02:58:11,492 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 02:58:11,492 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 02:58:11,492 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 02:58:11,492 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 02:58:11,493 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 02:58:11,493 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 02:58:11,493 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 02:58:11,493 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 02:58:11,493 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 02:58:11,493 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 02:58:11,493 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 02:58:11,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 02:58:11,494 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 02:58:11,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 02:58:11,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 02:58:11,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 02:58:11,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 02:58:11,549 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 02:58:11,551 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 02:58:11,708 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 02:58:11,751 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 02:58:11,752 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 02:58:11,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 02:58:11 BoogieIcfgContainer [2023-04-01 02:58:11,754 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 02:58:11,756 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 02:58:11,756 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 02:58:11,758 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 02:58:11,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 02:58:11" (1/3) ... [2023-04-01 02:58:11,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8f0095c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 02:58:11, skipping insertion in model container [2023-04-01 02:58:11,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:58:11" (2/3) ... [2023-04-01 02:58:11,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8f0095c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 02:58:11, skipping insertion in model container [2023-04-01 02:58:11,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 02:58:11" (3/3) ... [2023-04-01 02:58:11,777 INFO L112 eAbstractionObserver]: Analyzing ICFG array_init_pair_sum_const.c [2023-04-01 02:58:11,796 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 02:58:11,796 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 02:58:11,839 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 02:58:11,845 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;@2f33010a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 02:58:11,846 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 02:58:11,850 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 02:58:11,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-01 02:58:11,857 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:58:11,857 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:58:11,858 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:58:11,863 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:58:11,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1372240758, now seen corresponding path program 1 times [2023-04-01 02:58:11,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:58:11,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101695691] [2023-04-01 02:58:11,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:58:11,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:58:11,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:58:12,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:58:12,149 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:58:12,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101695691] [2023-04-01 02:58:12,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101695691] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:58:12,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 02:58:12,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 02:58:12,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358919744] [2023-04-01 02:58:12,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:58:12,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 02:58:12,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:58:12,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 02:58:12,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 02:58:12,184 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:58:12,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:58:12,277 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2023-04-01 02:58:12,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 02:58:12,279 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-04-01 02:58:12,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:58:12,285 INFO L225 Difference]: With dead ends: 33 [2023-04-01 02:58:12,285 INFO L226 Difference]: Without dead ends: 17 [2023-04-01 02:58:12,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 02:58:12,297 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:58:12,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:58:12,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-04-01 02:58:12,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-04-01 02:58:12,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:58:12,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2023-04-01 02:58:12,336 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2023-04-01 02:58:12,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:58:12,337 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2023-04-01 02:58:12,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:58:12,338 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2023-04-01 02:58:12,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-01 02:58:12,338 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:58:12,339 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:58:12,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 02:58:12,339 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:58:12,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:58:12,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1147049993, now seen corresponding path program 1 times [2023-04-01 02:58:12,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:58:12,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867094194] [2023-04-01 02:58:12,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:58:12,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:58:12,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:58:12,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 02:58:12,543 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:58:12,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867094194] [2023-04-01 02:58:12,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867094194] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:58:12,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 02:58:12,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 02:58:12,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838493011] [2023-04-01 02:58:12,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:58:12,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 02:58:12,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:58:12,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 02:58:12,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 02:58:12,549 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:58:12,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:58:12,589 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2023-04-01 02:58:12,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 02:58:12,590 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-04-01 02:58:12,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:58:12,591 INFO L225 Difference]: With dead ends: 27 [2023-04-01 02:58:12,591 INFO L226 Difference]: Without dead ends: 18 [2023-04-01 02:58:12,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 02:58:12,592 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 5 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:58:12,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 20 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:58:12,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-04-01 02:58:12,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-04-01 02:58:12,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:58:12,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2023-04-01 02:58:12,603 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2023-04-01 02:58:12,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:58:12,604 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2023-04-01 02:58:12,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:58:12,604 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2023-04-01 02:58:12,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-01 02:58:12,605 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:58:12,605 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:58:12,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 02:58:12,605 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:58:12,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:58:12,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1469831347, now seen corresponding path program 1 times [2023-04-01 02:58:12,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:58:12,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137012217] [2023-04-01 02:58:12,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:58:12,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:58:12,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:58:12,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 02:58:12,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:58:12,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137012217] [2023-04-01 02:58:12,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137012217] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:58:12,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260424897] [2023-04-01 02:58:12,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:58:12,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:58:12,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:58:12,703 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:58:12,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 02:58:12,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:58:12,807 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 02:58:12,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:58:12,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 02:58:12,879 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:58:12,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 02:58:12,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260424897] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:58:12,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [706548949] [2023-04-01 02:58:12,941 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 02:58:12,941 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:58:12,944 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:58:12,949 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:58:12,949 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:58:13,056 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:58:13,416 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-04-01 02:58:13,441 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:58:13,449 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:58:13,850 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '262#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#c~0.base_BEFORE_CALL_1| Int)) (and (< (select (select |#memory_int| |v_main_~#c~0.base_BEFORE_CALL_1|) 4) 3) (<= (+ |#StackHeapBarrier| 1) |v_main_~#c~0.base_BEFORE_CALL_1|) (<= 2 |v_main_~#c~0.base_BEFORE_CALL_1|) (<= 3 (+ |v_main_~#c~0.base_BEFORE_CALL_1| |#StackHeapBarrier|)))) (= |#NULL.base| 0))' at error location [2023-04-01 02:58:13,851 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:58:13,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:58:13,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-04-01 02:58:13,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038319523] [2023-04-01 02:58:13,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:58:13,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 02:58:13,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:58:13,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 02:58:13,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2023-04-01 02:58:13,854 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:58:13,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:58:13,889 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2023-04-01 02:58:13,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 02:58:13,890 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 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 14 [2023-04-01 02:58:13,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:58:13,891 INFO L225 Difference]: With dead ends: 32 [2023-04-01 02:58:13,891 INFO L226 Difference]: Without dead ends: 21 [2023-04-01 02:58:13,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2023-04-01 02:58:13,892 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:58:13,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 39 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:58:13,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-01 02:58:13,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-04-01 02:58:13,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:58:13,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2023-04-01 02:58:13,898 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 14 [2023-04-01 02:58:13,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:58:13,898 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2023-04-01 02:58:13,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:58:13,898 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2023-04-01 02:58:13,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-01 02:58:13,899 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:58:13,899 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:58:13,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 02:58:14,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:58:14,105 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:58:14,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:58:14,105 INFO L85 PathProgramCache]: Analyzing trace with hash 543032128, now seen corresponding path program 2 times [2023-04-01 02:58:14,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:58:14,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477076200] [2023-04-01 02:58:14,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:58:14,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:58:14,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:58:14,242 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 02:58:14,242 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:58:14,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477076200] [2023-04-01 02:58:14,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477076200] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:58:14,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325486124] [2023-04-01 02:58:14,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:58:14,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:58:14,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:58:14,246 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:58:14,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 02:58:14,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 02:58:14,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:58:14,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 02:58:14,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:58:14,377 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 02:58:14,377 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:58:14,420 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 02:58:14,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325486124] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:58:14,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [182942069] [2023-04-01 02:58:14,425 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 02:58:14,425 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:58:14,426 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:58:14,426 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:58:14,427 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:58:14,458 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:58:14,684 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-04-01 02:58:14,705 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:58:14,710 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:58:15,138 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '470#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#c~0.base_BEFORE_CALL_2| Int)) (and (<= 3 (+ |v_main_~#c~0.base_BEFORE_CALL_2| |#StackHeapBarrier|)) (< (select (select |#memory_int| |v_main_~#c~0.base_BEFORE_CALL_2|) 4) 3) (<= (+ |#StackHeapBarrier| 1) |v_main_~#c~0.base_BEFORE_CALL_2|) (<= 2 |v_main_~#c~0.base_BEFORE_CALL_2|))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:58:15,139 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:58:15,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:58:15,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 13 [2023-04-01 02:58:15,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624832859] [2023-04-01 02:58:15,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:58:15,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 02:58:15,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:58:15,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 02:58:15,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2023-04-01 02:58:15,141 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:58:15,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:58:15,282 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2023-04-01 02:58:15,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 02:58:15,282 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 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 17 [2023-04-01 02:58:15,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:58:15,284 INFO L225 Difference]: With dead ends: 57 [2023-04-01 02:58:15,285 INFO L226 Difference]: Without dead ends: 46 [2023-04-01 02:58:15,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2023-04-01 02:58:15,286 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:58:15,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 56 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:58:15,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-04-01 02:58:15,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 30. [2023-04-01 02:58:15,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:58:15,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2023-04-01 02:58:15,295 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 17 [2023-04-01 02:58:15,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:58:15,295 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2023-04-01 02:58:15,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:58:15,295 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2023-04-01 02:58:15,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 02:58:15,296 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:58:15,296 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:58:15,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 02:58:15,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-04-01 02:58:15,505 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:58:15,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:58:15,506 INFO L85 PathProgramCache]: Analyzing trace with hash -2142260461, now seen corresponding path program 3 times [2023-04-01 02:58:15,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:58:15,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654757504] [2023-04-01 02:58:15,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:58:15,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:58:15,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:58:15,759 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-01 02:58:15,759 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:58:15,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654757504] [2023-04-01 02:58:15,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654757504] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:58:15,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289149053] [2023-04-01 02:58:15,760 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 02:58:15,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:58:15,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:58:15,761 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:58:15,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 02:58:16,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 02:58:16,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:58:16,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 02:58:16,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:58:16,281 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-01 02:58:16,282 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:58:16,398 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-01 02:58:16,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289149053] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:58:16,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [643704614] [2023-04-01 02:58:16,400 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 02:58:16,400 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:58:16,400 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:58:16,401 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:58:16,401 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:58:16,422 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:58:16,560 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-04-01 02:58:16,574 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:58:16,579 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:58:16,930 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '818#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#c~0.base_BEFORE_CALL_3| Int)) (and (< (select (select |#memory_int| |v_main_~#c~0.base_BEFORE_CALL_3|) 4) 3) (<= 3 (+ |v_main_~#c~0.base_BEFORE_CALL_3| |#StackHeapBarrier|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#c~0.base_BEFORE_CALL_3|) (<= 2 |v_main_~#c~0.base_BEFORE_CALL_3|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:58:16,931 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:58:16,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:58:16,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2023-04-01 02:58:16,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524794885] [2023-04-01 02:58:16,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:58:16,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-01 02:58:16,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:58:16,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-01 02:58:16,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 02:58:16,934 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:58:16,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:58:16,981 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2023-04-01 02:58:16,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-01 02:58:16,981 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2023-04-01 02:58:16,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:58:16,982 INFO L225 Difference]: With dead ends: 56 [2023-04-01 02:58:16,982 INFO L226 Difference]: Without dead ends: 39 [2023-04-01 02:58:16,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 02:58:16,983 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:58:16,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 30 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:58:16,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-04-01 02:58:16,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-04-01 02:58:16,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:58:16,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2023-04-01 02:58:16,990 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 26 [2023-04-01 02:58:16,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:58:16,990 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2023-04-01 02:58:16,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:58:16,991 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2023-04-01 02:58:16,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-01 02:58:16,991 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:58:16,992 INFO L195 NwaCegarLoop]: trace histogram [16, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:58:17,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 02:58:17,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:58:17,202 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:58:17,202 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:58:17,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1322468032, now seen corresponding path program 4 times [2023-04-01 02:58:17,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:58:17,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275278563] [2023-04-01 02:58:17,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:58:17,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:58:17,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:58:17,627 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-01 02:58:17,628 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:58:17,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275278563] [2023-04-01 02:58:17,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275278563] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:58:17,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035813140] [2023-04-01 02:58:17,628 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 02:58:17,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:58:17,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:58:17,629 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:58:17,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 02:58:17,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:58:17,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 19 conjunts are in the unsatisfiable core [2023-04-01 02:58:17,762 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:58:18,064 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-01 02:58:18,064 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:58:18,481 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-01 02:58:18,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035813140] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:58:18,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1273763569] [2023-04-01 02:58:18,483 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 02:58:18,483 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:58:18,484 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:58:18,484 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:58:18,484 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:58:18,500 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:58:18,607 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-04-01 02:58:18,619 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:58:18,623 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:58:19,008 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1258#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#c~0.base_BEFORE_CALL_4| Int)) (and (< (select (select |#memory_int| |v_main_~#c~0.base_BEFORE_CALL_4|) 4) 3) (<= (+ |#StackHeapBarrier| 1) |v_main_~#c~0.base_BEFORE_CALL_4|) (<= 3 (+ |v_main_~#c~0.base_BEFORE_CALL_4| |#StackHeapBarrier|)) (<= 2 |v_main_~#c~0.base_BEFORE_CALL_4|))) (= |#NULL.base| 0))' at error location [2023-04-01 02:58:19,008 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:58:19,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:58:19,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 53 [2023-04-01 02:58:19,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035501462] [2023-04-01 02:58:19,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:58:19,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-04-01 02:58:19,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:58:19,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-04-01 02:58:19,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1390, Invalid=2516, Unknown=0, NotChecked=0, Total=3906 [2023-04-01 02:58:19,013 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 53 states, 53 states have (on average 1.150943396226415) internal successors, (61), 53 states have internal predecessors, (61), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:58:19,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:58:19,086 INFO L93 Difference]: Finished difference Result 74 states and 95 transitions. [2023-04-01 02:58:19,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-04-01 02:58:19,087 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.150943396226415) internal successors, (61), 53 states have internal predecessors, (61), 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 35 [2023-04-01 02:58:19,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:58:19,088 INFO L225 Difference]: With dead ends: 74 [2023-04-01 02:58:19,088 INFO L226 Difference]: Without dead ends: 57 [2023-04-01 02:58:19,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1971 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1390, Invalid=2516, Unknown=0, NotChecked=0, Total=3906 [2023-04-01 02:58:19,090 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:58:19,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 30 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:58:19,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-04-01 02:58:19,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-04-01 02:58:19,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:58:19,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2023-04-01 02:58:19,098 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 35 [2023-04-01 02:58:19,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:58:19,098 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2023-04-01 02:58:19,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.150943396226415) internal successors, (61), 53 states have internal predecessors, (61), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:58:19,099 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2023-04-01 02:58:19,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-01 02:58:19,100 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:58:19,100 INFO L195 NwaCegarLoop]: trace histogram [34, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:58:19,108 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-01 02:58:19,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:58:19,306 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:58:19,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:58:19,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1520799392, now seen corresponding path program 5 times [2023-04-01 02:58:19,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:58:19,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359906031] [2023-04-01 02:58:19,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:58:19,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:58:19,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:58:20,613 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-01 02:58:20,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:58:20,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359906031] [2023-04-01 02:58:20,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359906031] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:58:20,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330675825] [2023-04-01 02:58:20,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:58:20,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:58:20,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:58:20,617 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:58:20,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 02:58:20,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-04-01 02:58:20,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:58:20,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 02:58:20,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:58:21,071 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2023-04-01 02:58:21,071 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:58:21,403 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2023-04-01 02:58:21,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330675825] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:58:21,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [425995509] [2023-04-01 02:58:21,405 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 02:58:21,405 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:58:21,405 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:58:21,406 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:58:21,406 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:58:21,421 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:58:21,532 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-04-01 02:58:21,568 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:58:21,572 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:58:22,016 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1880#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#c~0.base_BEFORE_CALL_5| Int)) (and (<= 3 (+ |v_main_~#c~0.base_BEFORE_CALL_5| |#StackHeapBarrier|)) (<= 2 |v_main_~#c~0.base_BEFORE_CALL_5|) (< (select (select |#memory_int| |v_main_~#c~0.base_BEFORE_CALL_5|) 4) 3) (<= (+ |#StackHeapBarrier| 1) |v_main_~#c~0.base_BEFORE_CALL_5|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:58:22,016 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:58:22,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:58:22,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 11, 11] total 55 [2023-04-01 02:58:22,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232343046] [2023-04-01 02:58:22,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:58:22,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-04-01 02:58:22,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:58:22,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-04-01 02:58:22,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1518, Invalid=2642, Unknown=0, NotChecked=0, Total=4160 [2023-04-01 02:58:22,020 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand has 55 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 55 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) [2023-04-01 02:58:23,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:58:23,637 INFO L93 Difference]: Finished difference Result 243 states and 332 transitions. [2023-04-01 02:58:23,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-04-01 02:58:23,637 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 55 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 53 [2023-04-01 02:58:23,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:58:23,642 INFO L225 Difference]: With dead ends: 243 [2023-04-01 02:58:23,642 INFO L226 Difference]: Without dead ends: 226 [2023-04-01 02:58:23,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2684 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3268, Invalid=6632, Unknown=0, NotChecked=0, Total=9900 [2023-04-01 02:58:23,646 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 422 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 606 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 606 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 02:58:23,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [429 Valid, 38 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [606 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 02:58:23,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2023-04-01 02:58:23,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 102. [2023-04-01 02:58:23,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 96 states have (on average 1.03125) internal successors, (99), 96 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:58:23,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2023-04-01 02:58:23,705 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 53 [2023-04-01 02:58:23,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:58:23,706 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2023-04-01 02:58:23,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 55 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) [2023-04-01 02:58:23,707 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2023-04-01 02:58:23,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-04-01 02:58:23,711 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:58:23,711 INFO L195 NwaCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:58:23,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 02:58:23,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:58:23,917 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:58:23,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:58:23,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1279960749, now seen corresponding path program 6 times [2023-04-01 02:58:23,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:58:23,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432103243] [2023-04-01 02:58:23,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:58:23,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:58:24,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:58:26,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2023-04-01 02:58:26,106 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:58:26,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432103243] [2023-04-01 02:58:26,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432103243] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:58:26,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504894832] [2023-04-01 02:58:26,107 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 02:58:26,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:58:26,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:58:26,108 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:58:26,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process