/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/array-examples/standard_init4_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 14:05:53,353 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 14:05:53,355 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 14:05:53,384 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 14:05:53,384 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 14:05:53,385 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 14:05:53,386 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 14:05:53,387 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 14:05:53,396 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 14:05:53,402 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 14:05:53,402 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 14:05:53,403 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 14:05:53,403 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 14:05:53,404 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 14:05:53,405 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 14:05:53,405 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 14:05:53,406 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 14:05:53,407 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 14:05:53,408 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 14:05:53,409 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 14:05:53,410 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 14:05:53,417 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 14:05:53,420 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 14:05:53,421 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 14:05:53,429 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 14:05:53,432 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 14:05:53,432 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 14:05:53,433 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 14:05:53,433 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 14:05:53,434 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 14:05:53,434 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 14:05:53,435 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 14:05:53,435 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 14:05:53,435 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 14:05:53,436 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 14:05:53,436 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 14:05:53,441 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-02 14:05:53,473 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 14:05:53,473 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 14:05:53,474 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 14:05:53,474 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 14:05:53,475 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 14:05:53,475 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 14:05:53,475 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 14:05:53,475 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 14:05:53,475 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 14:05:53,476 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 14:05:53,476 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 14:05:53,476 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 14:05:53,477 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 14:05:53,477 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 14:05:53,477 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 14:05:53,477 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 14:05:53,477 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 14:05:53,477 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 14:05:53,478 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 14:05:53,478 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 14:05:53,478 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 14:05:53,478 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 14:05:53,478 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 14:05:53,479 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 14:05:53,479 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 14:05:53,479 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 14:05:53,479 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 14:05:53,479 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 14:05:53,479 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 14:05:53,479 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 14:05:53,480 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 14:05:53,480 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 14:05:53,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 14:05:53,480 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 14:05:53,480 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 14:05:53,480 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 14:05:53,481 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 14:05:53,481 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 14:05:53,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 14:05:53,481 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 14:05:53,481 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 14:05:53,481 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 14:05:53,697 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 14:05:53,722 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 14:05:53,727 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 14:05:53,728 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 14:05:53,729 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 14:05:53,730 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_init4_ground-1.i [2023-04-02 14:05:54,898 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 14:05:55,075 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 14:05:55,075 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init4_ground-1.i [2023-04-02 14:05:55,080 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a269329e/04b211c60e9d4ffeb3f030327dd98389/FLAG5a4252036 [2023-04-02 14:05:55,091 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a269329e/04b211c60e9d4ffeb3f030327dd98389 [2023-04-02 14:05:55,093 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 14:05:55,094 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 14:05:55,096 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 14:05:55,096 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 14:05:55,099 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 14:05:55,099 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:05:55" (1/1) ... [2023-04-02 14:05:55,100 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ae69413 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:05:55, skipping insertion in model container [2023-04-02 14:05:55,100 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:05:55" (1/1) ... [2023-04-02 14:05:55,106 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 14:05:55,117 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 14:05:55,232 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_init4_ground-1.i[816,829] [2023-04-02 14:05:55,247 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 14:05:55,254 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 14:05:55,264 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_init4_ground-1.i[816,829] [2023-04-02 14:05:55,270 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 14:05:55,282 INFO L208 MainTranslator]: Completed translation [2023-04-02 14:05:55,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:05:55 WrapperNode [2023-04-02 14:05:55,282 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 14:05:55,283 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 14:05:55,283 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 14:05:55,283 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 14:05:55,293 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:05:55" (1/1) ... [2023-04-02 14:05:55,294 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:05:55" (1/1) ... [2023-04-02 14:05:55,301 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:05:55" (1/1) ... [2023-04-02 14:05:55,301 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:05:55" (1/1) ... [2023-04-02 14:05:55,306 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:05:55" (1/1) ... [2023-04-02 14:05:55,309 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:05:55" (1/1) ... [2023-04-02 14:05:55,310 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:05:55" (1/1) ... [2023-04-02 14:05:55,311 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:05:55" (1/1) ... [2023-04-02 14:05:55,313 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 14:05:55,313 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 14:05:55,314 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 14:05:55,314 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 14:05:55,315 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:05:55" (1/1) ... [2023-04-02 14:05:55,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 14:05:55,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:05:55,342 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 14:05:55,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 14:05:55,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 14:05:55,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 14:05:55,394 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 14:05:55,394 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 14:05:55,394 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 14:05:55,394 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 14:05:55,394 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 14:05:55,394 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-02 14:05:55,394 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-02 14:05:55,394 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 14:05:55,394 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 14:05:55,395 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 14:05:55,395 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 14:05:55,395 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-02 14:05:55,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 14:05:55,395 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 14:05:55,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 14:05:55,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 14:05:55,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 14:05:55,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 14:05:55,460 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 14:05:55,461 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 14:05:55,583 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 14:05:55,611 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 14:05:55,612 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-04-02 14:05:55,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:05:55 BoogieIcfgContainer [2023-04-02 14:05:55,626 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 14:05:55,628 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 14:05:55,628 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 14:05:55,638 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 14:05:55,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 02:05:55" (1/3) ... [2023-04-02 14:05:55,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b813bee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:05:55, skipping insertion in model container [2023-04-02 14:05:55,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:05:55" (2/3) ... [2023-04-02 14:05:55,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b813bee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:05:55, skipping insertion in model container [2023-04-02 14:05:55,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:05:55" (3/3) ... [2023-04-02 14:05:55,642 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_init4_ground-1.i [2023-04-02 14:05:55,659 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 14:05:55,659 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 14:05:55,753 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 14:05:55,759 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;@1cbbc16f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 14:05:55,759 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 14:05:55,762 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 14:05:55,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-02 14:05:55,768 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:05:55,769 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:05:55,769 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:05:55,773 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:05:55,774 INFO L85 PathProgramCache]: Analyzing trace with hash 716964223, now seen corresponding path program 1 times [2023-04-02 14:05:55,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:05:55,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967463620] [2023-04-02 14:05:55,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:05:55,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:05:55,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:05:55,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:05:55,973 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:05:55,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967463620] [2023-04-02 14:05:55,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967463620] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 14:05:55,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 14:05:55,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 14:05:55,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765551568] [2023-04-02 14:05:55,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 14:05:55,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 14:05:55,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:05:56,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 14:05:56,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 14:05:56,005 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 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 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:05:56,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:05:56,050 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2023-04-02 14:05:56,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 14:05:56,052 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-04-02 14:05:56,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:05:56,056 INFO L225 Difference]: With dead ends: 40 [2023-04-02 14:05:56,056 INFO L226 Difference]: Without dead ends: 22 [2023-04-02 14:05:56,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 14:05:56,061 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:05:56,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:05:56,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-04-02 14:05:56,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-04-02 14:05:56,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.3125) internal successors, (21), 16 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) [2023-04-02 14:05:56,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-04-02 14:05:56,090 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2023-04-02 14:05:56,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:05:56,090 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-04-02 14:05:56,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:05:56,091 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-04-02 14:05:56,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-02 14:05:56,091 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:05:56,092 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:05:56,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 14:05:56,092 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:05:56,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:05:56,093 INFO L85 PathProgramCache]: Analyzing trace with hash -2117562915, now seen corresponding path program 1 times [2023-04-02 14:05:56,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:05:56,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552167387] [2023-04-02 14:05:56,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:05:56,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:05:56,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:05:56,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-02 14:05:56,189 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:05:56,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552167387] [2023-04-02 14:05:56,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552167387] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:05:56,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295418002] [2023-04-02 14:05:56,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:05:56,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:05:56,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:05:56,193 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:05:56,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 14:05:56,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:05:56,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 14:05:56,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:05:56,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-02 14:05:56,339 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:05:56,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-02 14:05:56,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295418002] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:05:56,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1951804418] [2023-04-02 14:05:56,411 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 14:05:56,411 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:05:56,414 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:05:56,418 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:05:56,419 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:05:56,523 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:05:56,787 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-04-02 14:05:56,827 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:05:56,835 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:05:57,148 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '237#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#a~0.base_BEFORE_CALL_1| Int)) (and (<= 2 |v_main_~#a~0.base_BEFORE_CALL_1|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_1|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_1|)) (not (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_1|) 0) 46)))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:05:57,149 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:05:57,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:05:57,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-02 14:05:57,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901331256] [2023-04-02 14:05:57,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:05:57,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 14:05:57,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:05:57,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 14:05:57,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2023-04-02 14:05:57,154 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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) [2023-04-02 14:05:57,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:05:57,226 INFO L93 Difference]: Finished difference Result 49 states and 68 transitions. [2023-04-02 14:05:57,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 14:05:57,227 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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 18 [2023-04-02 14:05:57,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:05:57,229 INFO L225 Difference]: With dead ends: 49 [2023-04-02 14:05:57,229 INFO L226 Difference]: Without dead ends: 34 [2023-04-02 14:05:57,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2023-04-02 14:05:57,233 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:05:57,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:05:57,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-04-02 14:05:57,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-04-02 14:05:57,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 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) [2023-04-02 14:05:57,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2023-04-02 14:05:57,246 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 18 [2023-04-02 14:05:57,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:05:57,247 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2023-04-02 14:05:57,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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) [2023-04-02 14:05:57,247 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2023-04-02 14:05:57,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-02 14:05:57,248 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:05:57,248 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:05:57,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 14:05:57,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:05:57,454 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:05:57,455 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:05:57,455 INFO L85 PathProgramCache]: Analyzing trace with hash 834299903, now seen corresponding path program 2 times [2023-04-02 14:05:57,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:05:57,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156630532] [2023-04-02 14:05:57,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:05:57,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:05:57,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:05:57,696 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-02 14:05:57,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:05:57,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156630532] [2023-04-02 14:05:57,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156630532] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:05:57,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752232720] [2023-04-02 14:05:57,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:05:57,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:05:57,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:05:57,701 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:05:57,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 14:05:57,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 14:05:57,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:05:57,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 14:05:57,778 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:05:57,793 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-02 14:05:57,793 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:05:57,842 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-02 14:05:57,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752232720] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:05:57,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2084512509] [2023-04-02 14:05:57,846 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 14:05:57,846 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:05:57,846 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:05:57,846 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:05:57,846 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:05:57,868 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:05:57,967 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-04-02 14:05:57,982 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:05:57,987 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:05:58,263 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '583#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#a~0.base_BEFORE_CALL_2| Int)) (and (not (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_2|) 0) 46)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_2|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_2|)) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_2|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:05:58,263 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:05:58,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:05:58,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-04-02 14:05:58,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677129716] [2023-04-02 14:05:58,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:05:58,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-02 14:05:58,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:05:58,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-02 14:05:58,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2023-04-02 14:05:58,266 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:05:58,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:05:58,409 INFO L93 Difference]: Finished difference Result 82 states and 113 transitions. [2023-04-02 14:05:58,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 14:05:58,409 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2023-04-02 14:05:58,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:05:58,410 INFO L225 Difference]: With dead ends: 82 [2023-04-02 14:05:58,410 INFO L226 Difference]: Without dead ends: 58 [2023-04-02 14:05:58,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2023-04-02 14:05:58,412 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:05:58,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:05:58,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-04-02 14:05:58,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2023-04-02 14:05:58,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 52 states have (on average 1.0961538461538463) internal successors, (57), 52 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) [2023-04-02 14:05:58,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2023-04-02 14:05:58,433 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 30 [2023-04-02 14:05:58,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:05:58,433 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2023-04-02 14:05:58,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:05:58,434 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2023-04-02 14:05:58,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-02 14:05:58,435 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:05:58,435 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:05:58,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 14:05:58,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-02 14:05:58,636 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:05:58,636 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:05:58,636 INFO L85 PathProgramCache]: Analyzing trace with hash -558954049, now seen corresponding path program 3 times [2023-04-02 14:05:58,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:05:58,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415937573] [2023-04-02 14:05:58,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:05:58,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:05:58,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:05:58,991 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2023-04-02 14:05:58,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:05:58,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415937573] [2023-04-02 14:05:58,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415937573] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:05:58,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437651501] [2023-04-02 14:05:58,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:05:58,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:05:58,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:05:58,993 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:05:58,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 14:05:59,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:05:59,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:05:59,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 14:05:59,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:05:59,137 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2023-04-02 14:05:59,137 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:05:59,310 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2023-04-02 14:05:59,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437651501] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:05:59,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1671980376] [2023-04-02 14:05:59,314 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 14:05:59,314 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:05:59,316 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:05:59,316 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:05:59,316 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:05:59,357 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:05:59,471 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-04-02 14:05:59,487 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:05:59,490 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:05:59,783 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1199#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#a~0.base_BEFORE_CALL_3| Int)) (and (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_3|) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_3|) (not (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_3|) 0) 46)) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_3|)))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:05:59,783 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:05:59,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:05:59,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-04-02 14:05:59,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192317924] [2023-04-02 14:05:59,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:05:59,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-02 14:05:59,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:05:59,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-02 14:05:59,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=856, Unknown=0, NotChecked=0, Total=1190 [2023-04-02 14:05:59,785 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:05:59,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:05:59,999 INFO L93 Difference]: Finished difference Result 148 states and 203 transitions. [2023-04-02 14:05:59,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-02 14:05:59,999 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 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 54 [2023-04-02 14:06:00,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:06:00,001 INFO L225 Difference]: With dead ends: 148 [2023-04-02 14:06:00,001 INFO L226 Difference]: Without dead ends: 106 [2023-04-02 14:06:00,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=334, Invalid=856, Unknown=0, NotChecked=0, Total=1190 [2023-04-02 14:06:00,002 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 14:06:00,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 67 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 14:06:00,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-04-02 14:06:00,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2023-04-02 14:06:00,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 100 states have (on average 1.05) internal successors, (105), 100 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) [2023-04-02 14:06:00,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2023-04-02 14:06:00,013 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 54 [2023-04-02 14:06:00,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:06:00,014 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2023-04-02 14:06:00,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:06:00,014 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2023-04-02 14:06:00,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-04-02 14:06:00,016 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:06:00,017 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:06:00,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 14:06:00,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:06:00,224 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:06:00,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:06:00,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1191600833, now seen corresponding path program 4 times [2023-04-02 14:06:00,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:06:00,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470371121] [2023-04-02 14:06:00,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:06:00,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:06:00,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:06:01,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2023-04-02 14:06:01,095 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:06:01,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470371121] [2023-04-02 14:06:01,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470371121] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:06:01,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138234074] [2023-04-02 14:06:01,096 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:06:01,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:06:01,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:06:01,097 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:06:01,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 14:06:01,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:06:01,264 INFO L262 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-02 14:06:01,268 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:06:01,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2023-04-02 14:06:01,310 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:06:01,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2023-04-02 14:06:01,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138234074] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:06:01,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1095620095] [2023-04-02 14:06:01,989 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 14:06:01,990 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:06:01,990 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:06:01,990 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:06:01,990 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:06:02,006 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:06:02,096 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-04-02 14:06:02,107 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:06:02,111 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:06:02,447 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2355#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#a~0.base_BEFORE_CALL_4| Int)) (and (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_4|) (not (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_4|) 0) 46)) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_4|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_4|)))) (= |#NULL.base| 0))' at error location [2023-04-02 14:06:02,448 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:06:02,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:06:02,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2023-04-02 14:06:02,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746621633] [2023-04-02 14:06:02,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:06:02,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-04-02 14:06:02,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:06:02,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-04-02 14:06:02,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1210, Invalid=2212, Unknown=0, NotChecked=0, Total=3422 [2023-04-02 14:06:02,451 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand has 49 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 49 states have internal predecessors, (61), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:06:02,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:06:02,934 INFO L93 Difference]: Finished difference Result 280 states and 383 transitions. [2023-04-02 14:06:02,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-04-02 14:06:02,935 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 49 states have internal predecessors, (61), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2023-04-02 14:06:02,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:06:02,936 INFO L225 Difference]: With dead ends: 280 [2023-04-02 14:06:02,937 INFO L226 Difference]: Without dead ends: 202 [2023-04-02 14:06:02,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1210, Invalid=2212, Unknown=0, NotChecked=0, Total=3422 [2023-04-02 14:06:02,939 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 601 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 601 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 14:06:02,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [601 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 14:06:02,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2023-04-02 14:06:02,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2023-04-02 14:06:02,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 196 states have (on average 1.0255102040816326) internal successors, (201), 196 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) [2023-04-02 14:06:02,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 206 transitions. [2023-04-02 14:06:02,954 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 206 transitions. Word has length 102 [2023-04-02 14:06:02,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:06:02,955 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 206 transitions. [2023-04-02 14:06:02,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 49 states have internal predecessors, (61), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 14:06:02,955 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 206 transitions. [2023-04-02 14:06:02,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2023-04-02 14:06:02,961 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:06:02,961 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:06:02,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 14:06:03,171 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 [2023-04-02 14:06:03,171 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:06:03,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:06:03,172 INFO L85 PathProgramCache]: Analyzing trace with hash -562822081, now seen corresponding path program 5 times [2023-04-02 14:06:03,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:06:03,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525254054] [2023-04-02 14:06:03,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:06:03,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:06:03,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:06:05,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 3243 trivial. 0 not checked. [2023-04-02 14:06:05,800 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:06:05,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525254054] [2023-04-02 14:06:05,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525254054] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:06:05,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072340388] [2023-04-02 14:06:05,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:06:05,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:06:05,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:06:05,805 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:06:05,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process