/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/sorting_bubblesort_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 20:34:37,705 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 20:34:37,707 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 20:34:37,729 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 20:34:37,730 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 20:34:37,730 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 20:34:37,731 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 20:34:37,732 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 20:34:37,733 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 20:34:37,733 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 20:34:37,734 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 20:34:37,735 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 20:34:37,735 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 20:34:37,735 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 20:34:37,736 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 20:34:37,737 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 20:34:37,737 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 20:34:37,737 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 20:34:37,738 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 20:34:37,739 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 20:34:37,740 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 20:34:37,741 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 20:34:37,742 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 20:34:37,742 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 20:34:37,744 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-31 20:34:37,746 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 20:34:37,747 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 20:34:37,747 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 20:34:37,748 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 20:34:37,748 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 20:34:37,748 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 20:34:37,749 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 20:34:37,749 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 20:34:37,749 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 20:34:37,750 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 20:34:37,750 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 20:34:37,752 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 20:34:37,775 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 20:34:37,775 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 20:34:37,775 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 20:34:37,775 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 20:34:37,776 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 20:34:37,776 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 20:34:37,776 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 20:34:37,776 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 20:34:37,776 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 20:34:37,776 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 20:34:37,777 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 20:34:37,777 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 20:34:37,777 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 20:34:37,777 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 20:34:37,777 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 20:34:37,778 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 20:34:37,778 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 20:34:37,778 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 20:34:37,778 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 20:34:37,778 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 20:34:37,778 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 20:34:37,778 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 20:34:37,778 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 20:34:37,779 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 20:34:37,779 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 20:34:37,779 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 20:34:37,779 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 20:34:37,779 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 20:34:37,779 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 20:34:37,779 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 20:34:37,779 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 20:34:37,779 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 20:34:37,779 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 20:34:37,780 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 20:34:37,780 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 20:34:37,780 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 20:34:37,780 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 20:34:37,780 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 20:34:37,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 20:34:37,780 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 20:34:37,780 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 20:34:37,780 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 20:34:37,959 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 20:34:37,975 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 20:34:37,978 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 20:34:37,979 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 20:34:37,979 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 20:34:37,980 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/sorting_bubblesort_ground-2.i [2023-03-31 20:34:39,006 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 20:34:39,129 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 20:34:39,130 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_bubblesort_ground-2.i [2023-03-31 20:34:39,134 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7fd4aee3/fee48613ec2343cb93a3e6f32ff8f554/FLAG55aaf8580 [2023-03-31 20:34:39,144 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7fd4aee3/fee48613ec2343cb93a3e6f32ff8f554 [2023-03-31 20:34:39,146 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 20:34:39,147 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 20:34:39,148 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 20:34:39,148 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 20:34:39,150 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 20:34:39,151 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 08:34:39" (1/1) ... [2023-03-31 20:34:39,152 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@190180b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:34:39, skipping insertion in model container [2023-03-31 20:34:39,152 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 08:34:39" (1/1) ... [2023-03-31 20:34:39,156 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 20:34:39,166 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 20:34:39,264 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/sorting_bubblesort_ground-2.i[820,833] [2023-03-31 20:34:39,277 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 20:34:39,283 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 20:34:39,291 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/sorting_bubblesort_ground-2.i[820,833] [2023-03-31 20:34:39,300 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 20:34:39,310 INFO L208 MainTranslator]: Completed translation [2023-03-31 20:34:39,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:34:39 WrapperNode [2023-03-31 20:34:39,310 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 20:34:39,311 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 20:34:39,311 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 20:34:39,311 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 20:34:39,318 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:34:39" (1/1) ... [2023-03-31 20:34:39,319 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:34:39" (1/1) ... [2023-03-31 20:34:39,331 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:34:39" (1/1) ... [2023-03-31 20:34:39,331 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:34:39" (1/1) ... [2023-03-31 20:34:39,336 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:34:39" (1/1) ... [2023-03-31 20:34:39,338 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:34:39" (1/1) ... [2023-03-31 20:34:39,339 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:34:39" (1/1) ... [2023-03-31 20:34:39,340 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:34:39" (1/1) ... [2023-03-31 20:34:39,341 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 20:34:39,342 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 20:34:39,342 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 20:34:39,342 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 20:34:39,342 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:34:39" (1/1) ... [2023-03-31 20:34:39,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 20:34:39,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:34:39,373 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 20:34:39,375 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 20:34:39,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 20:34:39,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 20:34:39,407 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 20:34:39,408 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 20:34:39,408 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 20:34:39,408 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 20:34:39,408 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 20:34:39,408 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-03-31 20:34:39,411 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-03-31 20:34:39,411 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 20:34:39,411 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 20:34:39,411 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 20:34:39,411 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 20:34:39,411 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 20:34:39,411 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-31 20:34:39,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 20:34:39,411 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 20:34:39,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 20:34:39,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 20:34:39,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 20:34:39,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 20:34:39,525 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 20:34:39,526 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 20:34:39,823 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 20:34:39,872 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 20:34:39,872 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-03-31 20:34:39,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 08:34:39 BoogieIcfgContainer [2023-03-31 20:34:39,874 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 20:34:39,875 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 20:34:39,876 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 20:34:39,878 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 20:34:39,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 08:34:39" (1/3) ... [2023-03-31 20:34:39,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cd00285 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 08:34:39, skipping insertion in model container [2023-03-31 20:34:39,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:34:39" (2/3) ... [2023-03-31 20:34:39,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cd00285 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 08:34:39, skipping insertion in model container [2023-03-31 20:34:39,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 08:34:39" (3/3) ... [2023-03-31 20:34:39,880 INFO L112 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_ground-2.i [2023-03-31 20:34:39,892 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 20:34:39,893 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 20:34:39,938 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 20:34:39,943 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;@14c119c3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 20:34:39,944 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 20:34:39,947 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) [2023-03-31 20:34:39,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-03-31 20:34:39,953 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:34:39,953 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:34:39,954 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:34:39,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:34:39,960 INFO L85 PathProgramCache]: Analyzing trace with hash 789727649, now seen corresponding path program 1 times [2023-03-31 20:34:39,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:34:39,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185963575] [2023-03-31 20:34:39,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:34:39,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:34:40,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:34:40,175 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 20:34:40,175 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:34:40,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185963575] [2023-03-31 20:34:40,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185963575] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 20:34:40,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 20:34:40,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 20:34:40,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27110897] [2023-03-31 20:34:40,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 20:34:40,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 20:34:40,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:34:40,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 20:34:40,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 20:34:40,222 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 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:34:40,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:34:40,281 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2023-03-31 20:34:40,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 20:34:40,283 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-03-31 20:34:40,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:34:40,288 INFO L225 Difference]: With dead ends: 37 [2023-03-31 20:34:40,288 INFO L226 Difference]: Without dead ends: 19 [2023-03-31 20:34:40,290 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 20:34:40,294 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:34:40,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:34:40,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-03-31 20:34:40,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-03-31 20:34:40,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 20:34:40,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2023-03-31 20:34:40,323 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 13 [2023-03-31 20:34:40,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:34:40,324 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2023-03-31 20:34:40,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:34:40,325 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2023-03-31 20:34:40,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-03-31 20:34:40,326 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:34:40,326 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:34:40,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 20:34:40,327 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:34:40,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:34:40,328 INFO L85 PathProgramCache]: Analyzing trace with hash -15636784, now seen corresponding path program 1 times [2023-03-31 20:34:40,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:34:40,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622704125] [2023-03-31 20:34:40,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:34:40,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:34:40,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:34:40,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 20:34:40,402 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:34:40,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622704125] [2023-03-31 20:34:40,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622704125] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 20:34:40,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 20:34:40,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 20:34:40,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955010185] [2023-03-31 20:34:40,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 20:34:40,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 20:34:40,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:34:40,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 20:34:40,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 20:34:40,405 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. 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) [2023-03-31 20:34:40,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:34:40,421 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2023-03-31 20:34:40,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 20:34:40,422 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 [2023-03-31 20:34:40,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:34:40,423 INFO L225 Difference]: With dead ends: 30 [2023-03-31 20:34:40,423 INFO L226 Difference]: Without dead ends: 20 [2023-03-31 20:34:40,423 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 20:34:40,424 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:34:40,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:34:40,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-03-31 20:34:40,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-03-31 20:34:40,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 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 20:34:40,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2023-03-31 20:34:40,428 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 14 [2023-03-31 20:34:40,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:34:40,429 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2023-03-31 20:34:40,429 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) [2023-03-31 20:34:40,429 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2023-03-31 20:34:40,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-03-31 20:34:40,429 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:34:40,429 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:34:40,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 20:34:40,430 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:34:40,430 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:34:40,430 INFO L85 PathProgramCache]: Analyzing trace with hash 578410913, now seen corresponding path program 1 times [2023-03-31 20:34:40,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:34:40,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706482812] [2023-03-31 20:34:40,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:34:40,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:34:40,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:34:40,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 20:34:40,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:34:40,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706482812] [2023-03-31 20:34:40,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706482812] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:34:40,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881867914] [2023-03-31 20:34:40,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:34:40,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:34:40,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:34:40,558 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 20:34:40,563 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 20:34:40,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:34:40,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 2 conjunts are in the unsatisfiable core [2023-03-31 20:34:40,630 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:34:40,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 20:34:40,652 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 20:34:40,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881867914] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 20:34:40,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 20:34:40,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-03-31 20:34:40,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441321415] [2023-03-31 20:34:40,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 20:34:40,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 20:34:40,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:34:40,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 20:34:40,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 20:34:40,658 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 20:34:40,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:34:40,685 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2023-03-31 20:34:40,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 20:34:40,686 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 16 [2023-03-31 20:34:40,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:34:40,686 INFO L225 Difference]: With dead ends: 33 [2023-03-31 20:34:40,686 INFO L226 Difference]: Without dead ends: 21 [2023-03-31 20:34:40,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 20:34:40,687 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:34:40,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:34:40,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-03-31 20:34:40,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-03-31 20:34:40,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 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 20:34:40,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-03-31 20:34:40,691 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 16 [2023-03-31 20:34:40,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:34:40,691 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-03-31 20:34:40,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 20:34:40,691 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-03-31 20:34:40,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-03-31 20:34:40,691 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:34:40,692 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:34:40,713 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 20:34:40,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:34:40,900 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:34:40,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:34:40,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1120817467, now seen corresponding path program 1 times [2023-03-31 20:34:40,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:34:40,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289074144] [2023-03-31 20:34:40,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:34:40,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:34:40,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:34:40,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 20:34:40,942 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:34:40,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289074144] [2023-03-31 20:34:40,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289074144] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:34:40,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026187725] [2023-03-31 20:34:40,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:34:40,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:34:40,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:34:40,944 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 20:34:40,965 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 20:34:41,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:34:41,008 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-31 20:34:41,010 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:34:41,037 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 20:34:41,037 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:34:41,072 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 20:34:41,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026187725] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:34:41,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1628901371] [2023-03-31 20:34:41,090 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-03-31 20:34:41,090 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:34:41,095 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:34:41,099 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:34:41,100 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:34:41,166 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:34:41,422 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 20 for LOIs [2023-03-31 20:34:41,434 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:34:41,438 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:34:45,652 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '440#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#a~0.offset_BEFORE_CALL_1| Int) (|v_main_~#a~0.base_BEFORE_CALL_1| Int)) (< (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_1|) (+ |v_main_~#a~0.offset_BEFORE_CALL_1| 4)) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_1|) |v_main_~#a~0.offset_BEFORE_CALL_1|))))' at error location [2023-03-31 20:34:45,652 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:34:45,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:34:45,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-03-31 20:34:45,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949899151] [2023-03-31 20:34:45,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:34:45,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 20:34:45,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:34:45,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 20:34:45,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2023-03-31 20:34:45,654 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:34:45,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:34:45,690 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2023-03-31 20:34:45,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 20:34:45,691 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-03-31 20:34:45,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:34:45,691 INFO L225 Difference]: With dead ends: 38 [2023-03-31 20:34:45,691 INFO L226 Difference]: Without dead ends: 24 [2023-03-31 20:34:45,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2023-03-31 20:34:45,694 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:34:45,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 53 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:34:45,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-03-31 20:34:45,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-03-31 20:34:45,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 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 20:34:45,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-03-31 20:34:45,701 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2023-03-31 20:34:45,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:34:45,701 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-03-31 20:34:45,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:34:45,701 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-03-31 20:34:45,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-03-31 20:34:45,702 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:34:45,702 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:34:45,719 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 20:34:45,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-03-31 20:34:45,909 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:34:45,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:34:45,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1798724972, now seen corresponding path program 2 times [2023-03-31 20:34:45,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:34:45,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274825445] [2023-03-31 20:34:45,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:34:45,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:34:45,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:34:46,010 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-03-31 20:34:46,011 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:34:46,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274825445] [2023-03-31 20:34:46,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274825445] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:34:46,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901903400] [2023-03-31 20:34:46,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 20:34:46,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:34:46,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:34:46,025 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 20:34:46,026 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 20:34:46,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-31 20:34:46,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:34:46,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 20:34:46,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:34:46,110 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 20:34:46,110 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:34:46,158 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 20:34:46,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901903400] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:34:46,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1286221115] [2023-03-31 20:34:46,160 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-03-31 20:34:46,160 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:34:46,160 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:34:46,160 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:34:46,160 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:34:46,178 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:34:46,294 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 20 for LOIs [2023-03-31 20:34:46,299 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:34:46,302 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:34:50,571 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '687#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#a~0.base_BEFORE_CALL_2| Int) (|v_main_~#a~0.offset_BEFORE_CALL_2| Int)) (< (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_2|) (+ |v_main_~#a~0.offset_BEFORE_CALL_2| 4)) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_2|) |v_main_~#a~0.offset_BEFORE_CALL_2|))))' at error location [2023-03-31 20:34:50,571 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:34:50,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:34:50,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2023-03-31 20:34:50,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083236212] [2023-03-31 20:34:50,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:34:50,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-03-31 20:34:50,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:34:50,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-03-31 20:34:50,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2023-03-31 20:34:50,573 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 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 20:34:50,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:34:50,609 INFO L93 Difference]: Finished difference Result 45 states and 59 transitions. [2023-03-31 20:34:50,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-03-31 20:34:50,610 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 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 20 [2023-03-31 20:34:50,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:34:50,610 INFO L225 Difference]: With dead ends: 45 [2023-03-31 20:34:50,610 INFO L226 Difference]: Without dead ends: 31 [2023-03-31 20:34:50,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2023-03-31 20:34:50,611 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:34:50,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 105 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:34:50,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-03-31 20:34:50,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-03-31 20:34:50,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 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 20:34:50,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2023-03-31 20:34:50,614 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 20 [2023-03-31 20:34:50,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:34:50,615 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2023-03-31 20:34:50,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 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 20:34:50,615 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2023-03-31 20:34:50,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-03-31 20:34:50,615 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:34:50,615 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:34:50,633 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 20:34:50,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:34:50,820 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:34:50,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:34:50,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1311085102, now seen corresponding path program 3 times [2023-03-31 20:34:50,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:34:50,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011676870] [2023-03-31 20:34:50,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:34:50,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:34:50,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:34:50,965 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-03-31 20:34:50,966 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:34:50,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011676870] [2023-03-31 20:34:50,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011676870] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:34:50,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858433637] [2023-03-31 20:34:50,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 20:34:50,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:34:50,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:34:50,967 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 20:34:50,969 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 20:34:51,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 20:34:51,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:34:51,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 12 conjunts are in the unsatisfiable core [2023-03-31 20:34:51,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:34:51,117 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 20:34:51,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:34:51,269 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 20:34:51,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858433637] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:34:51,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [360217883] [2023-03-31 20:34:51,273 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-03-31 20:34:51,273 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:34:51,273 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:34:51,273 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:34:51,273 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:34:51,287 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:34:51,377 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 20 for LOIs [2023-03-31 20:34:51,381 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:34:51,383 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:34:55,610 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1017#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#a~0.base_BEFORE_CALL_3| Int) (|v_main_~#a~0.offset_BEFORE_CALL_3| Int)) (< (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_3|) (+ |v_main_~#a~0.offset_BEFORE_CALL_3| 4)) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_3|) |v_main_~#a~0.offset_BEFORE_CALL_3|))))' at error location [2023-03-31 20:34:55,610 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:34:55,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:34:55,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 13, 13] total 27 [2023-03-31 20:34:55,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411397457] [2023-03-31 20:34:55,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:34:55,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-03-31 20:34:55,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:34:55,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-03-31 20:34:55,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=1164, Unknown=0, NotChecked=0, Total=1482 [2023-03-31 20:34:55,612 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 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 20:34:55,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:34:55,651 INFO L93 Difference]: Finished difference Result 59 states and 79 transitions. [2023-03-31 20:34:55,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-03-31 20:34:55,651 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 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 27 [2023-03-31 20:34:55,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:34:55,652 INFO L225 Difference]: With dead ends: 59 [2023-03-31 20:34:55,652 INFO L226 Difference]: Without dead ends: 44 [2023-03-31 20:34:55,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=318, Invalid=1164, Unknown=0, NotChecked=0, Total=1482 [2023-03-31 20:34:55,653 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:34:55,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 92 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:34:55,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-03-31 20:34:55,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-03-31 20:34:55,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 38 states have (on average 1.131578947368421) internal successors, (43), 38 states have internal predecessors, (43), 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 20:34:55,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2023-03-31 20:34:55,661 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 27 [2023-03-31 20:34:55,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:34:55,662 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2023-03-31 20:34:55,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 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 20:34:55,662 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2023-03-31 20:34:55,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-03-31 20:34:55,677 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:34:55,677 INFO L195 NwaCegarLoop]: trace histogram [22, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:34:55,684 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 20:34:55,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:34:55,878 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:34:55,878 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:34:55,878 INFO L85 PathProgramCache]: Analyzing trace with hash -740729484, now seen corresponding path program 4 times [2023-03-31 20:34:55,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:34:55,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775432993] [2023-03-31 20:34:55,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:34:55,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:34:55,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:34:56,542 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-03-31 20:34:56,543 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:34:56,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775432993] [2023-03-31 20:34:56,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775432993] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:34:56,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939631239] [2023-03-31 20:34:56,543 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 20:34:56,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:34:56,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:34:56,557 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 20:34:56,573 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 20:34:56,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:34:56,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 24 conjunts are in the unsatisfiable core [2023-03-31 20:34:56,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:34:56,720 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-03-31 20:34:56,720 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:34:57,209 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-03-31 20:34:57,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939631239] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:34:57,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [334120329] [2023-03-31 20:34:57,210 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-03-31 20:34:57,210 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:34:57,211 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:34:57,211 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:34:57,211 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:34:57,227 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:34:57,339 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 20 for LOIs [2023-03-31 20:34:57,343 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:34:57,346 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:35:01,680 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1501#(and (exists ((|v_main_~#a~0.base_BEFORE_CALL_4| Int) (|v_main_~#a~0.offset_BEFORE_CALL_4| Int)) (< (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_4|) (+ |v_main_~#a~0.offset_BEFORE_CALL_4| 4)) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_4|) |v_main_~#a~0.offset_BEFORE_CALL_4|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 20:35:01,680 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:35:01,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:35:01,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2023-03-31 20:35:01,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139176863] [2023-03-31 20:35:01,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:35:01,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-03-31 20:35:01,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:35:01,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-03-31 20:35:01,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1209, Invalid=2451, Unknown=0, NotChecked=0, Total=3660 [2023-03-31 20:35:01,683 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 49 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 states have internal predecessors, (60), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:35:01,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:35:01,736 INFO L93 Difference]: Finished difference Result 84 states and 115 transitions. [2023-03-31 20:35:01,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-03-31 20:35:01,736 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 states have internal predecessors, (60), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2023-03-31 20:35:01,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:35:01,736 INFO L225 Difference]: With dead ends: 84 [2023-03-31 20:35:01,737 INFO L226 Difference]: Without dead ends: 68 [2023-03-31 20:35:01,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1209, Invalid=2451, Unknown=0, NotChecked=0, Total=3660 [2023-03-31 20:35:01,738 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:35:01,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 79 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:35:01,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-03-31 20:35:01,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2023-03-31 20:35:01,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 62 states have internal predecessors, (67), 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 20:35:01,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2023-03-31 20:35:01,743 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 40 [2023-03-31 20:35:01,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:35:01,743 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2023-03-31 20:35:01,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 states have internal predecessors, (60), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:35:01,743 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2023-03-31 20:35:01,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-03-31 20:35:01,744 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:35:01,744 INFO L195 NwaCegarLoop]: trace histogram [46, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:35:01,761 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 20:35:01,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:35:01,949 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:35:01,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:35:01,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1763014388, now seen corresponding path program 5 times [2023-03-31 20:35:01,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:35:01,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536633517] [2023-03-31 20:35:01,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:35:01,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:35:02,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:35:03,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-03-31 20:35:03,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:35:03,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536633517] [2023-03-31 20:35:03,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536633517] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:35:03,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105390972] [2023-03-31 20:35:03,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 20:35:03,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:35:03,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:35:03,330 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 20:35:03,332 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 20:35:03,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-03-31 20:35:03,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:35:03,475 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 5 conjunts are in the unsatisfiable core [2023-03-31 20:35:03,479 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:35:03,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2023-03-31 20:35:03,565 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:35:03,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2023-03-31 20:35:03,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105390972] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:35:03,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [659467458] [2023-03-31 20:35:03,655 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-03-31 20:35:03,655 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:35:03,655 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:35:03,655 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:35:03,656 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:35:03,664 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:35:03,726 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 20 for LOIs [2023-03-31 20:35:03,730 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:35:03,731 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:35:08,169 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2235#(and (exists ((|v_main_~#a~0.base_BEFORE_CALL_5| Int) (|v_main_~#a~0.offset_BEFORE_CALL_5| Int)) (< (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_5|) (+ |v_main_~#a~0.offset_BEFORE_CALL_5| 4)) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_5|) |v_main_~#a~0.offset_BEFORE_CALL_5|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 20:35:08,169 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:35:08,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:35:08,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 6, 6] total 57 [2023-03-31 20:35:08,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043776625] [2023-03-31 20:35:08,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:35:08,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-03-31 20:35:08,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:35:08,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-03-31 20:35:08,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1253, Invalid=3439, Unknown=0, NotChecked=0, Total=4692 [2023-03-31 20:35:08,172 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 57 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 57 states have internal predecessors, (71), 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 20:35:08,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:35:08,234 INFO L93 Difference]: Finished difference Result 90 states and 103 transitions. [2023-03-31 20:35:08,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-03-31 20:35:08,234 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 57 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2023-03-31 20:35:08,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:35:08,235 INFO L225 Difference]: With dead ends: 90 [2023-03-31 20:35:08,235 INFO L226 Difference]: Without dead ends: 74 [2023-03-31 20:35:08,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1064 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1253, Invalid=3439, Unknown=0, NotChecked=0, Total=4692 [2023-03-31 20:35:08,236 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:35:08,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 105 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:35:08,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-03-31 20:35:08,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2023-03-31 20:35:08,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 68 states have (on average 1.0735294117647058) internal successors, (73), 68 states have internal predecessors, (73), 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 20:35:08,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2023-03-31 20:35:08,243 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 64 [2023-03-31 20:35:08,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:35:08,244 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2023-03-31 20:35:08,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 57 states have internal predecessors, (71), 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 20:35:08,244 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2023-03-31 20:35:08,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-03-31 20:35:08,248 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:35:08,248 INFO L195 NwaCegarLoop]: trace histogram [47, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:35:08,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-31 20:35:08,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:35:08,449 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:35:08,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:35:08,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1442109311, now seen corresponding path program 6 times [2023-03-31 20:35:08,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:35:08,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012568654] [2023-03-31 20:35:08,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:35:08,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:35:08,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:35:09,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1165 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-03-31 20:35:09,819 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:35:09,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012568654] [2023-03-31 20:35:09,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012568654] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:35:09,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031173524] [2023-03-31 20:35:09,819 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 20:35:09,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:35:09,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:35:09,822 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:35:09,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-31 20:35:09,974 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 20:35:09,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:35:09,976 INFO L262 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 49 conjunts are in the unsatisfiable core [2023-03-31 20:35:09,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:35:10,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1165 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-03-31 20:35:10,038 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:35:12,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1165 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-03-31 20:35:12,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031173524] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:35:12,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1614497093] [2023-03-31 20:35:12,292 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-03-31 20:35:12,292 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:35:12,292 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:35:12,293 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:35:12,293 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:35:12,318 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:35:12,448 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 20 for LOIs [2023-03-31 20:35:12,452 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:35:12,454 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:35:16,944 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3071#(and (exists ((|v_main_~#a~0.offset_BEFORE_CALL_6| Int) (|v_main_~#a~0.base_BEFORE_CALL_6| Int)) (< (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_6|) (+ |v_main_~#a~0.offset_BEFORE_CALL_6| 4)) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_6|) |v_main_~#a~0.offset_BEFORE_CALL_6|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 20:35:16,944 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:35:16,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:35:16,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 99 [2023-03-31 20:35:16,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274178931] [2023-03-31 20:35:16,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:35:16,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2023-03-31 20:35:16,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:35:16,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2023-03-31 20:35:16,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4884, Invalid=7326, Unknown=0, NotChecked=0, Total=12210 [2023-03-31 20:35:16,948 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand has 99 states, 99 states have (on average 1.1111111111111112) internal successors, (110), 99 states have internal predecessors, (110), 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 20:35:17,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:35:17,042 INFO L93 Difference]: Finished difference Result 144 states and 200 transitions. [2023-03-31 20:35:17,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2023-03-31 20:35:17,043 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.1111111111111112) internal successors, (110), 99 states have internal predecessors, (110), 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 70 [2023-03-31 20:35:17,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:35:17,044 INFO L225 Difference]: With dead ends: 144 [2023-03-31 20:35:17,044 INFO L226 Difference]: Without dead ends: 123 [2023-03-31 20:35:17,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1940 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=4884, Invalid=7326, Unknown=0, NotChecked=0, Total=12210 [2023-03-31 20:35:17,048 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:35:17,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 66 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:35:17,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-03-31 20:35:17,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2023-03-31 20:35:17,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 117 states have (on average 1.0427350427350428) internal successors, (122), 117 states have internal predecessors, (122), 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 20:35:17,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 127 transitions. [2023-03-31 20:35:17,054 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 127 transitions. Word has length 70 [2023-03-31 20:35:17,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:35:17,054 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 127 transitions. [2023-03-31 20:35:17,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.1111111111111112) internal successors, (110), 99 states have internal predecessors, (110), 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 20:35:17,055 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 127 transitions. [2023-03-31 20:35:17,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-03-31 20:35:17,055 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:35:17,056 INFO L195 NwaCegarLoop]: trace histogram [96, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:35:17,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-03-31 20:35:17,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:35:17,259 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:35:17,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:35:17,259 INFO L85 PathProgramCache]: Analyzing trace with hash 808965938, now seen corresponding path program 7 times [2023-03-31 20:35:17,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:35:17,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264951711] [2023-03-31 20:35:17,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:35:17,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:35:17,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:35:21,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4693 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-03-31 20:35:21,752 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:35:21,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264951711] [2023-03-31 20:35:21,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264951711] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:35:21,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880977074] [2023-03-31 20:35:21,752 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 20:35:21,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:35:21,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:35:21,753 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:35:21,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-03-31 20:35:21,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:35:21,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 1018 conjuncts, 98 conjunts are in the unsatisfiable core [2023-03-31 20:35:21,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:35:22,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4693 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-03-31 20:35:22,108 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:35:28,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4693 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-03-31 20:35:28,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880977074] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:35:28,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1806040412] [2023-03-31 20:35:28,313 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-03-31 20:35:28,314 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:35:28,314 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:35:28,314 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:35:28,314 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:35:28,333 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:35:28,434 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 20 for LOIs [2023-03-31 20:35:28,439 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:35:28,440 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:35:33,068 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4505#(and (exists ((|v_main_~#a~0.offset_BEFORE_CALL_7| Int) (|v_main_~#a~0.base_BEFORE_CALL_7| Int)) (< (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_7|) (+ |v_main_~#a~0.offset_BEFORE_CALL_7| 4)) (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_7|) |v_main_~#a~0.offset_BEFORE_CALL_7|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 20:35:33,068 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:35:33,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:35:33,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99, 99] total 197 [2023-03-31 20:35:33,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049863203] [2023-03-31 20:35:33,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:35:33,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 197 states [2023-03-31 20:35:33,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:35:33,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2023-03-31 20:35:33,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19339, Invalid=24133, Unknown=0, NotChecked=0, Total=43472 [2023-03-31 20:35:33,080 INFO L87 Difference]: Start difference. First operand 123 states and 127 transitions. Second operand has 197 states, 197 states have (on average 1.0558375634517767) internal successors, (208), 197 states have internal predecessors, (208), 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 20:35:33,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:35:33,348 INFO L93 Difference]: Finished difference Result 242 states and 347 transitions. [2023-03-31 20:35:33,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2023-03-31 20:35:33,349 INFO L78 Accepts]: Start accepts. Automaton has has 197 states, 197 states have (on average 1.0558375634517767) internal successors, (208), 197 states have internal predecessors, (208), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2023-03-31 20:35:33,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:35:33,350 INFO L225 Difference]: With dead ends: 242 [2023-03-31 20:35:33,350 INFO L226 Difference]: Without dead ends: 221 [2023-03-31 20:35:33,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3900 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=19339, Invalid=24133, Unknown=0, NotChecked=0, Total=43472 [2023-03-31 20:35:33,354 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:35:33,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 79 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:35:33,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2023-03-31 20:35:33,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2023-03-31 20:35:33,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 215 states have (on average 1.0232558139534884) internal successors, (220), 215 states have internal predecessors, (220), 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 20:35:33,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 225 transitions. [2023-03-31 20:35:33,401 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 225 transitions. Word has length 119 [2023-03-31 20:35:33,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:35:33,401 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 225 transitions. [2023-03-31 20:35:33,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 197 states, 197 states have (on average 1.0558375634517767) internal successors, (208), 197 states have internal predecessors, (208), 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 20:35:33,402 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 225 transitions. [2023-03-31 20:35:33,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2023-03-31 20:35:33,403 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:35:33,412 INFO L195 NwaCegarLoop]: trace histogram [194, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:35:33,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-03-31 20:35:33,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-03-31 20:35:33,619 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:35:33,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:35:33,620 INFO L85 PathProgramCache]: Analyzing trace with hash -929923310, now seen corresponding path program 8 times [2023-03-31 20:35:33,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:35:33,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606423595] [2023-03-31 20:35:33,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:35:33,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:35:33,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:35:49,983 INFO L134 CoverageAnalysis]: Checked inductivity of 18952 backedges. 0 proven. 18915 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-03-31 20:35:49,983 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:35:49,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606423595] [2023-03-31 20:35:49,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606423595] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:35:49,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045931473] [2023-03-31 20:35:49,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 20:35:49,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:35:49,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:35:49,984 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:35:49,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-03-31 20:35:50,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-03-31 20:35:50,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:35:50,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 10 conjunts are in the unsatisfiable core [2023-03-31 20:35:50,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:35:50,963 INFO L134 CoverageAnalysis]: Checked inductivity of 18952 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 18915 trivial. 0 not checked. [2023-03-31 20:35:50,963 INFO L327 TraceCheckSpWp]: Computing backward predicates...