/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/nla-digbench-scaling/prodbin-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 23:26:44,326 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 23:26:44,328 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 23:26:44,362 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 23:26:44,363 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 23:26:44,363 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 23:26:44,364 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 23:26:44,365 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 23:26:44,366 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 23:26:44,366 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 23:26:44,367 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 23:26:44,368 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 23:26:44,368 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 23:26:44,369 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 23:26:44,369 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 23:26:44,370 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 23:26:44,370 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 23:26:44,371 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 23:26:44,372 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 23:26:44,373 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 23:26:44,374 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 23:26:44,377 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 23:26:44,377 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 23:26:44,378 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 23:26:44,380 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-31 23:26:44,382 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 23:26:44,383 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 23:26:44,383 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 23:26:44,383 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 23:26:44,384 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 23:26:44,384 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 23:26:44,385 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 23:26:44,385 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 23:26:44,385 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 23:26:44,386 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 23:26:44,386 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 23:26:44,393 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 23:26:44,419 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 23:26:44,420 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 23:26:44,420 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 23:26:44,420 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 23:26:44,421 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 23:26:44,421 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 23:26:44,421 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 23:26:44,421 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 23:26:44,421 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 23:26:44,421 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 23:26:44,422 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 23:26:44,422 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 23:26:44,422 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 23:26:44,422 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 23:26:44,422 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 23:26:44,422 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 23:26:44,422 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 23:26:44,422 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 23:26:44,423 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 23:26:44,423 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 23:26:44,423 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 23:26:44,423 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 23:26:44,423 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 23:26:44,423 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 23:26:44,423 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 23:26:44,423 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 23:26:44,423 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 23:26:44,423 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 23:26:44,423 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 23:26:44,423 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 23:26:44,424 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 23:26:44,424 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 23:26:44,424 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:26:44,424 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 23:26:44,424 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 23:26:44,424 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 23:26:44,424 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 23:26:44,424 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 23:26:44,424 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 23:26:44,424 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 23:26:44,424 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 23:26:44,425 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 23:26:44,617 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 23:26:44,634 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 23:26:44,636 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 23:26:44,637 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 23:26:44,638 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 23:26:44,639 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound50.c [2023-03-31 23:26:45,589 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 23:26:45,751 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 23:26:45,751 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound50.c [2023-03-31 23:26:45,756 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4759866c1/0e0dae42eccc4273a32757b4ca471c6b/FLAG84ff6426b [2023-03-31 23:26:45,767 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4759866c1/0e0dae42eccc4273a32757b4ca471c6b [2023-03-31 23:26:45,769 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 23:26:45,770 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 23:26:45,771 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 23:26:45,771 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 23:26:45,773 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 23:26:45,774 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:26:45" (1/1) ... [2023-03-31 23:26:45,775 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16644fa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:26:45, skipping insertion in model container [2023-03-31 23:26:45,775 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:26:45" (1/1) ... [2023-03-31 23:26:45,779 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 23:26:45,791 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 23:26:45,889 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/nla-digbench-scaling/prodbin-ll_valuebound50.c[537,550] [2023-03-31 23:26:45,903 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:26:45,910 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 23:26:45,918 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/nla-digbench-scaling/prodbin-ll_valuebound50.c[537,550] [2023-03-31 23:26:45,923 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:26:45,932 INFO L208 MainTranslator]: Completed translation [2023-03-31 23:26:45,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:26:45 WrapperNode [2023-03-31 23:26:45,933 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 23:26:45,933 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 23:26:45,933 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 23:26:45,933 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 23:26:45,942 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:26:45" (1/1) ... [2023-03-31 23:26:45,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:26:45" (1/1) ... [2023-03-31 23:26:45,948 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:26:45" (1/1) ... [2023-03-31 23:26:45,948 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:26:45" (1/1) ... [2023-03-31 23:26:45,952 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:26:45" (1/1) ... [2023-03-31 23:26:45,955 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:26:45" (1/1) ... [2023-03-31 23:26:45,956 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:26:45" (1/1) ... [2023-03-31 23:26:45,957 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:26:45" (1/1) ... [2023-03-31 23:26:45,958 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 23:26:45,959 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 23:26:45,959 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 23:26:45,959 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 23:26:45,960 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:26:45" (1/1) ... [2023-03-31 23:26:45,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:26:45,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:26:45,995 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 23:26:45,997 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 23:26:46,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 23:26:46,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 23:26:46,036 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 23:26:46,036 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-31 23:26:46,036 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 23:26:46,036 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 23:26:46,036 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 23:26:46,037 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 23:26:46,037 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 23:26:46,037 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 23:26:46,037 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 23:26:46,037 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-31 23:26:46,037 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 23:26:46,037 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 23:26:46,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 23:26:46,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 23:26:46,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 23:26:46,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 23:26:46,038 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 23:26:46,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 23:26:46,082 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 23:26:46,083 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 23:26:46,209 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 23:26:46,264 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 23:26:46,264 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 23:26:46,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:26:46 BoogieIcfgContainer [2023-03-31 23:26:46,266 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 23:26:46,277 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 23:26:46,277 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 23:26:46,279 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 23:26:46,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 11:26:45" (1/3) ... [2023-03-31 23:26:46,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@190b3198 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:26:46, skipping insertion in model container [2023-03-31 23:26:46,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:26:45" (2/3) ... [2023-03-31 23:26:46,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@190b3198 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:26:46, skipping insertion in model container [2023-03-31 23:26:46,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:26:46" (3/3) ... [2023-03-31 23:26:46,281 INFO L112 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound50.c [2023-03-31 23:26:46,293 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 23:26:46,294 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 23:26:46,347 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 23:26:46,352 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;@4e327020, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 23:26:46,352 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 23:26:46,356 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-03-31 23:26:46,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-03-31 23:26:46,361 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:26:46,361 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:26:46,362 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:26:46,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:26:46,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1830456286, now seen corresponding path program 1 times [2023-03-31 23:26:46,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:26:46,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137553869] [2023-03-31 23:26:46,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:26:46,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:26:46,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:26:46,493 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:26:46,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137553869] [2023-03-31 23:26:46,493 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-03-31 23:26:46,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364263839] [2023-03-31 23:26:46,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:26:46,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:26:46,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:26:46,498 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 23:26:46,530 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 23:26:46,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:26:46,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 1 conjunts are in the unsatisfiable core [2023-03-31 23:26:46,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:26:46,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 23:26:46,610 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:26:46,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364263839] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:26:46,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:26:46,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-03-31 23:26:46,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083412764] [2023-03-31 23:26:46,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:26:46,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-03-31 23:26:46,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:26:46,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-03-31 23:26:46,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 23:26:46,653 INFO L87 Difference]: Start difference. First operand has 26 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-03-31 23:26:46,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:26:46,671 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2023-03-31 23:26:46,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-03-31 23:26:46,673 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 21 [2023-03-31 23:26:46,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:26:46,677 INFO L225 Difference]: With dead ends: 40 [2023-03-31 23:26:46,677 INFO L226 Difference]: Without dead ends: 22 [2023-03-31 23:26:46,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 23:26:46,681 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 23:26:46,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 23:26:46,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-03-31 23:26:46,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-03-31 23:26:46,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 23:26:46,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2023-03-31 23:26:46,708 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 21 [2023-03-31 23:26:46,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:26:46,709 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2023-03-31 23:26:46,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-03-31 23:26:46,710 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2023-03-31 23:26:46,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-03-31 23:26:46,710 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:26:46,710 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:26:46,721 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 23:26:46,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-03-31 23:26:46,911 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:26:46,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:26:46,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1775908965, now seen corresponding path program 1 times [2023-03-31 23:26:46,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:26:46,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100339759] [2023-03-31 23:26:46,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:26:46,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:26:46,930 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:26:46,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [321440318] [2023-03-31 23:26:46,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:26:46,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:26:46,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:26:46,945 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 23:26:46,946 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 23:26:46,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:26:46,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2023-03-31 23:26:47,000 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:26:47,104 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 23:26:47,104 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:26:47,104 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:26:47,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100339759] [2023-03-31 23:26:47,104 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:26:47,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321440318] [2023-03-31 23:26:47,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321440318] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:26:47,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:26:47,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-31 23:26:47,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903339622] [2023-03-31 23:26:47,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:26:47,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 23:26:47,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:26:47,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 23:26:47,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-03-31 23:26:47,107 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-03-31 23:26:47,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:26:47,199 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2023-03-31 23:26:47,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 23:26:47,200 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 21 [2023-03-31 23:26:47,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:26:47,201 INFO L225 Difference]: With dead ends: 36 [2023-03-31 23:26:47,201 INFO L226 Difference]: Without dead ends: 29 [2023-03-31 23:26:47,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-31 23:26:47,202 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 9 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:26:47,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 59 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:26:47,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-03-31 23:26:47,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-03-31 23:26:47,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 23:26:47,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2023-03-31 23:26:47,208 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 21 [2023-03-31 23:26:47,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:26:47,208 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2023-03-31 23:26:47,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-03-31 23:26:47,208 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2023-03-31 23:26:47,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-03-31 23:26:47,209 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:26:47,209 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:26:47,232 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 23:26:47,414 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,SelfDestructingSolverStorable1 [2023-03-31 23:26:47,414 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:26:47,415 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:26:47,415 INFO L85 PathProgramCache]: Analyzing trace with hash 936039800, now seen corresponding path program 1 times [2023-03-31 23:26:47,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:26:47,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723708482] [2023-03-31 23:26:47,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:26:47,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:26:47,443 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:26:47,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [349639514] [2023-03-31 23:26:47,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:26:47,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:26:47,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:26:47,456 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 23:26:47,458 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 23:26:47,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:26:47,514 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 37 conjunts are in the unsatisfiable core [2023-03-31 23:26:47,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:26:48,919 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 23:26:48,920 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:26:57,027 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 23:26:57,027 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:26:57,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723708482] [2023-03-31 23:26:57,028 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:26:57,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349639514] [2023-03-31 23:26:57,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349639514] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:26:57,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1378923383] [2023-03-31 23:26:57,040 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-03-31 23:26:57,041 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:26:57,043 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:26:57,046 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:26:57,046 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:26:57,081 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:26:57,275 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2023-03-31 23:26:57,292 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2023-03-31 23:26:57,293 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:26:57,296 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:26:57,884 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '529#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 23:26:57,884 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:26:57,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:26:57,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2023-03-31 23:26:57,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140404465] [2023-03-31 23:26:57,885 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:26:57,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-03-31 23:26:57,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:26:57,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-03-31 23:26:57,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2023-03-31 23:26:57,886 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 17 states, 16 states have (on average 1.5) internal successors, (24), 13 states have internal predecessors, (24), 8 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2023-03-31 23:27:01,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:27:01,890 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2023-03-31 23:27:01,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-31 23:27:01,891 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.5) internal successors, (24), 13 states have internal predecessors, (24), 8 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 28 [2023-03-31 23:27:01,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:27:01,895 INFO L225 Difference]: With dead ends: 44 [2023-03-31 23:27:01,895 INFO L226 Difference]: Without dead ends: 42 [2023-03-31 23:27:01,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=158, Invalid=964, Unknown=0, NotChecked=0, Total=1122 [2023-03-31 23:27:01,899 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 27 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 23:27:01,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 100 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 23:27:01,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-03-31 23:27:01,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2023-03-31 23:27:01,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 26 states have internal predecessors, (28), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2023-03-31 23:27:01,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2023-03-31 23:27:01,908 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 28 [2023-03-31 23:27:01,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:27:01,908 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2023-03-31 23:27:01,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.5) internal successors, (24), 13 states have internal predecessors, (24), 8 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2023-03-31 23:27:01,908 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2023-03-31 23:27:01,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-03-31 23:27:01,909 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:27:01,909 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:27:01,922 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 23:27:02,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:27:02,109 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:27:02,110 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:27:02,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1754869888, now seen corresponding path program 1 times [2023-03-31 23:27:02,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:27:02,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249640369] [2023-03-31 23:27:02,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:27:02,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:27:02,120 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:27:02,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [91825446] [2023-03-31 23:27:02,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:27:02,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:27:02,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:27:02,121 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 23:27:02,123 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 23:27:02,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:27:02,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2023-03-31 23:27:02,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:27:02,205 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-31 23:27:02,205 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:27:02,435 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-03-31 23:27:02,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:27:02,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249640369] [2023-03-31 23:27:02,436 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:27:02,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91825446] [2023-03-31 23:27:02,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91825446] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:27:02,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [877624943] [2023-03-31 23:27:02,438 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-03-31 23:27:02,438 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:27:02,438 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:27:02,438 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:27:02,438 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:27:02,449 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:27:02,589 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2023-03-31 23:27:02,592 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2023-03-31 23:27:02,593 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:27:02,596 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:27:02,809 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '892#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 23:27:02,809 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:27:02,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:27:02,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2023-03-31 23:27:02,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677127486] [2023-03-31 23:27:02,810 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:27:02,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-31 23:27:02,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:27:02,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-31 23:27:02,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=462, Unknown=1, NotChecked=0, Total=552 [2023-03-31 23:27:02,811 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2023-03-31 23:27:04,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-03-31 23:27:04,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:27:04,515 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2023-03-31 23:27:04,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 23:27:04,524 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) Word has length 34 [2023-03-31 23:27:04,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:27:04,524 INFO L225 Difference]: With dead ends: 47 [2023-03-31 23:27:04,524 INFO L226 Difference]: Without dead ends: 40 [2023-03-31 23:27:04,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=544, Unknown=1, NotChecked=0, Total=650 [2023-03-31 23:27:04,525 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 12 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-03-31 23:27:04,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 122 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 1 Unknown, 0 Unchecked, 1.7s Time] [2023-03-31 23:27:04,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-03-31 23:27:04,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-03-31 23:27:04,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2023-03-31 23:27:04,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2023-03-31 23:27:04,536 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 34 [2023-03-31 23:27:04,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:27:04,536 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2023-03-31 23:27:04,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2023-03-31 23:27:04,537 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2023-03-31 23:27:04,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-03-31 23:27:04,537 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:27:04,537 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:27:04,542 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-03-31 23:27:04,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:27:04,738 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:27:04,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:27:04,738 INFO L85 PathProgramCache]: Analyzing trace with hash -689370715, now seen corresponding path program 2 times [2023-03-31 23:27:04,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:27:04,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502508944] [2023-03-31 23:27:04,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:27:04,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:27:04,758 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:27:04,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1120657474] [2023-03-31 23:27:04,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 23:27:04,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:27:04,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:27:04,765 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 23:27:04,784 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 23:27:04,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-03-31 23:27:04,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 23:27:04,825 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 36 conjunts are in the unsatisfiable core [2023-03-31 23:27:04,828 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:27:25,463 WARN L223 SmtUtils]: Spent 18.47s on a formula simplification. DAG size of input: 88 DAG size of output: 71 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-03-31 23:27:25,920 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-03-31 23:27:25,921 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:27:34,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:27:34,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502508944] [2023-03-31 23:27:34,115 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:27:34,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120657474] [2023-03-31 23:27:34,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120657474] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:27:34,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [88202969] [2023-03-31 23:27:34,117 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-03-31 23:27:34,117 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:27:34,117 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:27:34,117 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:27:34,117 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:27:34,136 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:27:34,255 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2023-03-31 23:27:34,269 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2023-03-31 23:27:34,281 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:27:34,284 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:27:34,924 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1224#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 23:27:34,925 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:27:34,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:27:34,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-03-31 23:27:34,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061740954] [2023-03-31 23:27:34,925 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-03-31 23:27:34,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-03-31 23:27:34,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:27:34,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-03-31 23:27:34,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=869, Unknown=2, NotChecked=0, Total=992 [2023-03-31 23:27:34,927 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 11 states have internal predecessors, (24), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2023-03-31 23:27:37,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-03-31 23:27:41,808 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-03-31 23:27:54,185 WARN L223 SmtUtils]: Spent 10.29s on a formula simplification. DAG size of input: 86 DAG size of output: 76 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-03-31 23:27:56,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-03-31 23:27:58,372 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0]