/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/array-examples/standard_init1_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 20:37:07,571 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 20:37:07,573 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 20:37:07,602 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 20:37:07,602 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 20:37:07,604 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 20:37:07,606 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 20:37:07,608 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 20:37:07,609 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 20:37:07,612 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 20:37:07,613 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 20:37:07,614 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 20:37:07,614 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 20:37:07,616 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 20:37:07,617 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 20:37:07,618 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 20:37:07,619 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 20:37:07,619 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 20:37:07,620 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 20:37:07,624 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 20:37:07,624 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 20:37:07,625 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 20:37:07,626 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 20:37:07,626 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 20:37:07,632 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-31 20:37:07,634 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 20:37:07,635 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 20:37:07,636 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 20:37:07,636 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 20:37:07,637 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 20:37:07,637 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 20:37:07,637 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 20:37:07,637 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 20:37:07,637 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 20:37:07,638 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 20:37:07,638 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 20:37:07,639 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-03-31 20:37:07,660 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 20:37:07,660 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 20:37:07,661 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 20:37:07,661 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 20:37:07,661 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 20:37:07,661 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 20:37:07,662 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 20:37:07,662 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 20:37:07,662 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 20:37:07,662 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 20:37:07,662 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 20:37:07,663 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 20:37:07,663 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 20:37:07,663 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 20:37:07,663 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 20:37:07,663 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 20:37:07,663 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 20:37:07,663 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 20:37:07,664 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 20:37:07,664 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 20:37:07,664 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 20:37:07,664 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 20:37:07,664 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 20:37:07,664 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 20:37:07,664 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 20:37:07,664 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 20:37:07,664 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 20:37:07,665 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 20:37:07,665 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 20:37:07,665 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 20:37:07,665 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 20:37:07,665 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 20:37:07,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 20:37:07,665 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 20:37:07,665 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 20:37:07,665 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 20:37:07,666 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 20:37:07,666 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 20:37:07,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 20:37:07,666 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 20:37:07,666 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 20:37:07,666 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 20:37:07,845 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 20:37:07,860 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 20:37:07,862 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 20:37:07,863 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 20:37:07,864 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 20:37:07,864 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_init1_ground-2.i [2023-03-31 20:37:08,886 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 20:37:09,079 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 20:37:09,079 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init1_ground-2.i [2023-03-31 20:37:09,084 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f4087f78/e598a13790f74a259d0d9c2d5e41a466/FLAG61cc6a631 [2023-03-31 20:37:09,099 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f4087f78/e598a13790f74a259d0d9c2d5e41a466 [2023-03-31 20:37:09,101 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 20:37:09,103 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 20:37:09,105 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 20:37:09,105 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 20:37:09,107 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 20:37:09,108 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 08:37:09" (1/1) ... [2023-03-31 20:37:09,109 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59d3aba9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:37:09, skipping insertion in model container [2023-03-31 20:37:09,109 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 08:37:09" (1/1) ... [2023-03-31 20:37:09,116 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 20:37:09,127 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 20:37:09,239 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-examples/standard_init1_ground-2.i[816,829] [2023-03-31 20:37:09,245 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 20:37:09,250 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 20:37:09,256 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-examples/standard_init1_ground-2.i[816,829] [2023-03-31 20:37:09,259 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 20:37:09,266 INFO L208 MainTranslator]: Completed translation [2023-03-31 20:37:09,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:37:09 WrapperNode [2023-03-31 20:37:09,266 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 20:37:09,267 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 20:37:09,267 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 20:37:09,267 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 20:37:09,273 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:37:09" (1/1) ... [2023-03-31 20:37:09,273 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:37:09" (1/1) ... [2023-03-31 20:37:09,277 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:37:09" (1/1) ... [2023-03-31 20:37:09,277 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:37:09" (1/1) ... [2023-03-31 20:37:09,280 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:37:09" (1/1) ... [2023-03-31 20:37:09,282 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:37:09" (1/1) ... [2023-03-31 20:37:09,282 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:37:09" (1/1) ... [2023-03-31 20:37:09,283 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:37:09" (1/1) ... [2023-03-31 20:37:09,284 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 20:37:09,285 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 20:37:09,285 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 20:37:09,285 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 20:37:09,285 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:37:09" (1/1) ... [2023-03-31 20:37:09,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 20:37:09,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:37:09,305 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 20:37:09,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 20:37:09,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 20:37:09,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 20:37:09,345 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 20:37:09,345 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 20:37:09,346 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 20:37:09,346 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 20:37:09,346 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 20:37:09,346 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-03-31 20:37:09,346 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-03-31 20:37:09,346 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 20:37:09,346 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 20:37:09,346 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 20:37:09,346 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 20:37:09,346 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-31 20:37:09,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 20:37:09,346 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 20:37:09,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 20:37:09,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 20:37:09,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 20:37:09,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 20:37:09,411 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 20:37:09,412 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 20:37:09,512 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 20:37:09,537 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 20:37:09,537 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-03-31 20:37:09,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 08:37:09 BoogieIcfgContainer [2023-03-31 20:37:09,539 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 20:37:09,540 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 20:37:09,541 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 20:37:09,543 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 20:37:09,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 08:37:09" (1/3) ... [2023-03-31 20:37:09,544 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@89ede6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 08:37:09, skipping insertion in model container [2023-03-31 20:37:09,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:37:09" (2/3) ... [2023-03-31 20:37:09,544 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@89ede6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 08:37:09, skipping insertion in model container [2023-03-31 20:37:09,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 08:37:09" (3/3) ... [2023-03-31 20:37:09,545 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_init1_ground-2.i [2023-03-31 20:37:09,559 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 20:37:09,560 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 20:37:09,605 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 20:37:09,612 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;@242d8d7d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 20:37:09,613 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 20:37:09,616 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 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) [2023-03-31 20:37:09,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 20:37:09,622 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:37:09,622 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:37:09,623 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:37:09,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:37:09,630 INFO L85 PathProgramCache]: Analyzing trace with hash 877806576, now seen corresponding path program 1 times [2023-03-31 20:37:09,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:37:09,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931781155] [2023-03-31 20:37:09,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:37:09,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:37:09,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:37:09,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:37:09,869 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:37:09,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931781155] [2023-03-31 20:37:09,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931781155] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 20:37:09,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 20:37:09,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 20:37:09,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324287562] [2023-03-31 20:37:09,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 20:37:09,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 20:37:09,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:37:09,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 20:37:09,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 20:37:09,925 INFO L87 Difference]: Start difference. First operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 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 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2023-03-31 20:37:09,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:37:09,975 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2023-03-31 20:37:09,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 20:37:09,977 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 11 [2023-03-31 20:37:09,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:37:09,981 INFO L225 Difference]: With dead ends: 31 [2023-03-31 20:37:09,981 INFO L226 Difference]: Without dead ends: 16 [2023-03-31 20:37:09,983 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 [2023-03-31 20:37:09,986 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:37:09,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:37:10,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-03-31 20:37:10,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-03-31 20:37:10,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 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) [2023-03-31 20:37:10,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2023-03-31 20:37:10,027 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2023-03-31 20:37:10,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:37:10,028 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2023-03-31 20:37:10,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2023-03-31 20:37:10,028 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2023-03-31 20:37:10,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-03-31 20:37:10,028 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:37:10,028 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:37:10,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 20:37:10,029 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:37:10,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:37:10,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1080909986, now seen corresponding path program 1 times [2023-03-31 20:37:10,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:37:10,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479284401] [2023-03-31 20:37:10,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:37:10,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:37:10,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:37:10,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:37:10,150 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:37:10,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479284401] [2023-03-31 20:37:10,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479284401] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:37:10,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070027294] [2023-03-31 20:37:10,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:37:10,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:37:10,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:37:10,165 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:37:10,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 20:37:10,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:37:10,224 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-31 20:37:10,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:37:10,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:37:10,278 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:37:10,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:37:10,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070027294] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:37:10,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [294569189] [2023-03-31 20:37:10,335 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-03-31 20:37:10,335 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:37:10,337 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:37:10,340 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:37:10,341 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:37:10,395 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:37:10,499 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2023-03-31 20:37:10,530 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:37:10,538 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:37:10,709 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '168#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#a~0.base_BEFORE_CALL_1| Int)) (and (<= 0 |v_main_~#a~0.base_BEFORE_CALL_1|) (not (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_1|) 0) 42)))) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:37:10,709 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:37:10,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:37:10,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-03-31 20:37:10,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816782762] [2023-03-31 20:37:10,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:37:10,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 20:37:10,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:37:10,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 20:37:10,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2023-03-31 20:37:10,711 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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) [2023-03-31 20:37:10,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:37:10,724 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2023-03-31 20:37:10,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 20:37:10,725 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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 [2023-03-31 20:37:10,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:37:10,725 INFO L225 Difference]: With dead ends: 28 [2023-03-31 20:37:10,725 INFO L226 Difference]: Without dead ends: 19 [2023-03-31 20:37:10,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2023-03-31 20:37:10,727 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 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 [2023-03-31 20:37:10,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:37:10,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-03-31 20:37:10,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-03-31 20:37:10,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 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) [2023-03-31 20:37:10,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2023-03-31 20:37:10,730 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 12 [2023-03-31 20:37:10,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:37:10,730 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2023-03-31 20:37:10,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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) [2023-03-31 20:37:10,730 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2023-03-31 20:37:10,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-03-31 20:37:10,731 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:37:10,731 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:37:10,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 20:37:10,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:37:10,936 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:37:10,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:37:10,936 INFO L85 PathProgramCache]: Analyzing trace with hash -259202960, now seen corresponding path program 2 times [2023-03-31 20:37:10,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:37:10,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269675036] [2023-03-31 20:37:10,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:37:10,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:37:10,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:37:11,055 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:37:11,055 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:37:11,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269675036] [2023-03-31 20:37:11,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269675036] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:37:11,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261180702] [2023-03-31 20:37:11,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 20:37:11,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:37:11,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:37:11,075 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:37:11,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 20:37:11,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-31 20:37:11,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:37:11,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 20:37:11,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:37:11,163 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:37:11,163 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:37:11,221 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:37:11,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261180702] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:37:11,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1429484828] [2023-03-31 20:37:11,225 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-03-31 20:37:11,225 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:37:11,225 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:37:11,225 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:37:11,225 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:37:11,247 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:37:11,269 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2023-03-31 20:37:11,280 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:37:11,284 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:37:11,460 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '352#(and (exists ((|v_main_~#a~0.base_BEFORE_CALL_2| Int)) (and (<= 0 |v_main_~#a~0.base_BEFORE_CALL_2|) (not (= 42 (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_2|) 0))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:37:11,460 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:37:11,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:37:11,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-03-31 20:37:11,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194359572] [2023-03-31 20:37:11,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:37:11,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-03-31 20:37:11,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:37:11,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-03-31 20:37:11,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2023-03-31 20:37:11,462 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 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) [2023-03-31 20:37:11,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:37:11,481 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2023-03-31 20:37:11,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-03-31 20:37:11,481 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 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 15 [2023-03-31 20:37:11,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:37:11,482 INFO L225 Difference]: With dead ends: 34 [2023-03-31 20:37:11,482 INFO L226 Difference]: Without dead ends: 25 [2023-03-31 20:37:11,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2023-03-31 20:37:11,483 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:37:11,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:37:11,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-03-31 20:37:11,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-03-31 20:37:11,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 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) [2023-03-31 20:37:11,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2023-03-31 20:37:11,486 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 15 [2023-03-31 20:37:11,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:37:11,486 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2023-03-31 20:37:11,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 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) [2023-03-31 20:37:11,487 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2023-03-31 20:37:11,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-03-31 20:37:11,487 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:37:11,487 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:37:11,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 20:37:11,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-03-31 20:37:11,692 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:37:11,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:37:11,692 INFO L85 PathProgramCache]: Analyzing trace with hash 934187824, now seen corresponding path program 3 times [2023-03-31 20:37:11,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:37:11,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597785034] [2023-03-31 20:37:11,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:37:11,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:37:11,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:37:11,891 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:37:11,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:37:11,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597785034] [2023-03-31 20:37:11,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597785034] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:37:11,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716685373] [2023-03-31 20:37:11,892 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 20:37:11,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:37:11,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:37:11,901 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:37:11,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 20:37:11,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 20:37:11,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:37:11,960 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 12 conjunts are in the unsatisfiable core [2023-03-31 20:37:11,962 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:37:11,982 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:37:11,982 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:37:12,130 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:37:12,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716685373] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:37:12,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [113680643] [2023-03-31 20:37:12,132 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-03-31 20:37:12,132 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:37:12,133 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:37:12,133 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:37:12,133 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:37:12,154 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:37:12,182 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2023-03-31 20:37:12,195 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:37:12,198 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:37:12,380 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '608#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#a~0.base_BEFORE_CALL_3| Int)) (and (not (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_3|) 0) 42)) (<= 0 |v_main_~#a~0.base_BEFORE_CALL_3|))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:37:12,381 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:37:12,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:37:12,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-03-31 20:37:12,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080904382] [2023-03-31 20:37:12,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:37:12,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-03-31 20:37:12,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:37:12,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-03-31 20:37:12,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=856, Unknown=0, NotChecked=0, Total=1190 [2023-03-31 20:37:12,383 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 25 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 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) [2023-03-31 20:37:12,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:37:12,411 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2023-03-31 20:37:12,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-03-31 20:37:12,411 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-03-31 20:37:12,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:37:12,412 INFO L225 Difference]: With dead ends: 46 [2023-03-31 20:37:12,412 INFO L226 Difference]: Without dead ends: 37 [2023-03-31 20:37:12,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=334, Invalid=856, Unknown=0, NotChecked=0, Total=1190 [2023-03-31 20:37:12,413 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:37:12,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:37:12,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-03-31 20:37:12,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-03-31 20:37:12,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 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) [2023-03-31 20:37:12,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2023-03-31 20:37:12,417 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 21 [2023-03-31 20:37:12,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:37:12,417 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2023-03-31 20:37:12,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 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) [2023-03-31 20:37:12,417 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2023-03-31 20:37:12,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-03-31 20:37:12,418 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:37:12,418 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:37:12,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 20:37:12,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:37:12,618 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:37:12,619 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:37:12,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1046137008, now seen corresponding path program 4 times [2023-03-31 20:37:12,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:37:12,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166709072] [2023-03-31 20:37:12,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:37:12,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:37:12,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:37:12,980 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:37:12,980 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:37:12,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166709072] [2023-03-31 20:37:12,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166709072] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:37:12,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802051264] [2023-03-31 20:37:12,981 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 20:37:12,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:37:12,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:37:12,982 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:37:12,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 20:37:13,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:37:13,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 24 conjunts are in the unsatisfiable core [2023-03-31 20:37:13,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:37:13,078 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:37:13,079 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:37:13,631 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:37:13,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802051264] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:37:13,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [273360352] [2023-03-31 20:37:13,633 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-03-31 20:37:13,633 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:37:13,633 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:37:13,633 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:37:13,633 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:37:13,646 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:37:13,665 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2023-03-31 20:37:13,672 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:37:13,674 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:37:13,909 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1008#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#a~0.base_BEFORE_CALL_4| Int)) (and (<= 0 |v_main_~#a~0.base_BEFORE_CALL_4|) (not (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_4|) 0) 42)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:37:13,909 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:37:13,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:37:13,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2023-03-31 20:37:13,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599279152] [2023-03-31 20:37:13,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:37:13,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-03-31 20:37:13,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:37:13,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-03-31 20:37:13,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1210, Invalid=2212, Unknown=0, NotChecked=0, Total=3422 [2023-03-31 20:37:13,912 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:37:13,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:37:13,967 INFO L93 Difference]: Finished difference Result 70 states and 95 transitions. [2023-03-31 20:37:13,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-03-31 20:37:13,967 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2023-03-31 20:37:13,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:37:13,968 INFO L225 Difference]: With dead ends: 70 [2023-03-31 20:37:13,968 INFO L226 Difference]: Without dead ends: 61 [2023-03-31 20:37:13,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1210, Invalid=2212, Unknown=0, NotChecked=0, Total=3422 [2023-03-31 20:37:13,969 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:37:13,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:37:13,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-03-31 20:37:13,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-03-31 20:37:13,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 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) [2023-03-31 20:37:13,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2023-03-31 20:37:13,974 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 33 [2023-03-31 20:37:13,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:37:13,974 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2023-03-31 20:37:13,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:37:13,974 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2023-03-31 20:37:13,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-03-31 20:37:13,975 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:37:13,975 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:37:13,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 20:37:14,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:37:14,180 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:37:14,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:37:14,180 INFO L85 PathProgramCache]: Analyzing trace with hash -542739536, now seen corresponding path program 5 times [2023-03-31 20:37:14,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:37:14,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661899372] [2023-03-31 20:37:14,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:37:14,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:37:14,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:37:15,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:37:15,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:37:15,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661899372] [2023-03-31 20:37:15,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661899372] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:37:15,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107973827] [2023-03-31 20:37:15,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 20:37:15,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:37:15,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:37:15,338 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) [2023-03-31 20:37:15,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 20:37:59,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2023-03-31 20:37:59,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:37:59,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 48 conjunts are in the unsatisfiable core [2023-03-31 20:37:59,342 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:37:59,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:37:59,456 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:38:01,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:38:01,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107973827] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:38:01,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1730119585] [2023-03-31 20:38:01,585 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-03-31 20:38:01,585 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:38:01,585 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:38:01,585 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:38:01,585 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:38:01,606 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:38:01,621 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2023-03-31 20:38:01,628 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:38:01,630 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:38:01,933 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1696#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#a~0.base_BEFORE_CALL_5| Int)) (and (<= 0 |v_main_~#a~0.base_BEFORE_CALL_5|) (not (= 42 (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_5|) 0))))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:38:01,933 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:38:01,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:38:01,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2023-03-31 20:38:01,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607778835] [2023-03-31 20:38:01,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:38:01,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-03-31 20:38:01,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:38:01,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-03-31 20:38:01,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4690, Invalid=6652, Unknown=0, NotChecked=0, Total=11342 [2023-03-31 20:38:01,938 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 97 states, 97 states have (on average 1.0618556701030928) internal successors, (103), 97 states have internal predecessors, (103), 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) [2023-03-31 20:38:02,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:38:02,048 INFO L93 Difference]: Finished difference Result 118 states and 167 transitions. [2023-03-31 20:38:02,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-03-31 20:38:02,048 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.0618556701030928) internal successors, (103), 97 states have internal predecessors, (103), 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 57 [2023-03-31 20:38:02,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:38:02,051 INFO L225 Difference]: With dead ends: 118 [2023-03-31 20:38:02,051 INFO L226 Difference]: Without dead ends: 109 [2023-03-31 20:38:02,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1604 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4690, Invalid=6652, Unknown=0, NotChecked=0, Total=11342 [2023-03-31 20:38:02,055 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:38:02,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 67 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:38:02,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-03-31 20:38:02,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2023-03-31 20:38:02,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 103 states have (on average 1.0194174757281553) internal successors, (105), 103 states have internal predecessors, (105), 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) [2023-03-31 20:38:02,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2023-03-31 20:38:02,078 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 57 [2023-03-31 20:38:02,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:38:02,079 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2023-03-31 20:38:02,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.0618556701030928) internal successors, (103), 97 states have internal predecessors, (103), 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) [2023-03-31 20:38:02,079 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2023-03-31 20:38:02,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-03-31 20:38:02,084 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:38:02,084 INFO L195 NwaCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:38:02,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-31 20:38:02,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:38:02,299 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:38:02,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:38:02,300 INFO L85 PathProgramCache]: Analyzing trace with hash -58013264, now seen corresponding path program 6 times [2023-03-31 20:38:02,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:38:02,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072270765] [2023-03-31 20:38:02,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:38:02,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:38:02,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:38:06,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:38:06,314 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:38:06,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072270765] [2023-03-31 20:38:06,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072270765] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:38:06,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568626199] [2023-03-31 20:38:06,314 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 20:38:06,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:38:06,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:38:06,316 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) [2023-03-31 20:38:06,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-31 20:38:06,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 20:38:06,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:38:06,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 96 conjunts are in the unsatisfiable core [2023-03-31 20:38:06,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:38:06,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:38:06,589 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:38:11,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:38:11,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568626199] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:38:11,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [511901698] [2023-03-31 20:38:11,926 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-03-31 20:38:11,926 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:38:11,926 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:38:11,926 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:38:11,926 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:38:11,948 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:38:11,963 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2023-03-31 20:38:11,968 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:38:11,975 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:38:12,447 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2960#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#a~0.base_BEFORE_CALL_6| Int)) (and (<= 0 |v_main_~#a~0.base_BEFORE_CALL_6|) (not (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_6|) 0) 42)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:38:12,448 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:38:12,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:38:12,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 193 [2023-03-31 20:38:12,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057130918] [2023-03-31 20:38:12,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:38:12,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2023-03-31 20:38:12,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:38:12,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2023-03-31 20:38:12,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18562, Invalid=22444, Unknown=0, NotChecked=0, Total=41006 [2023-03-31 20:38:12,464 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 193 states, 193 states have (on average 1.0310880829015545) internal successors, (199), 193 states have internal predecessors, (199), 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) [2023-03-31 20:38:12,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:38:12,882 INFO L93 Difference]: Finished difference Result 214 states and 311 transitions. [2023-03-31 20:38:12,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2023-03-31 20:38:12,882 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 1.0310880829015545) internal successors, (199), 193 states have internal predecessors, (199), 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 105 [2023-03-31 20:38:12,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:38:12,885 INFO L225 Difference]: With dead ends: 214 [2023-03-31 20:38:12,885 INFO L226 Difference]: Without dead ends: 205 [2023-03-31 20:38:12,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3236 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=18562, Invalid=22444, Unknown=0, NotChecked=0, Total=41006 [2023-03-31 20:38:12,888 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 20:38:12,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 20:38:12,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2023-03-31 20:38:12,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2023-03-31 20:38:12,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 199 states have (on average 1.0100502512562815) internal successors, (201), 199 states have internal predecessors, (201), 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) [2023-03-31 20:38:12,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 206 transitions. [2023-03-31 20:38:12,904 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 206 transitions. Word has length 105 [2023-03-31 20:38:12,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:38:12,905 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 206 transitions. [2023-03-31 20:38:12,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 1.0310880829015545) internal successors, (199), 193 states have internal predecessors, (199), 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) [2023-03-31 20:38:12,905 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 206 transitions. [2023-03-31 20:38:12,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2023-03-31 20:38:12,913 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:38:12,913 INFO L195 NwaCegarLoop]: trace histogram [190, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:38:12,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-03-31 20:38:13,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:38:13,119 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:38:13,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:38:13,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1938257328, now seen corresponding path program 7 times [2023-03-31 20:38:13,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:38:13,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325509034] [2023-03-31 20:38:13,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:38:13,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:38:13,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat