/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/nla-digbench/divbin2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 22:30:28,837 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 22:30:28,838 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 22:30:28,867 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 22:30:28,868 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 22:30:28,869 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 22:30:28,873 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 22:30:28,874 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 22:30:28,875 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 22:30:28,879 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 22:30:28,880 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 22:30:28,881 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 22:30:28,882 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 22:30:28,883 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 22:30:28,884 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 22:30:28,885 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 22:30:28,885 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 22:30:28,886 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 22:30:28,887 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 22:30:28,890 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 22:30:28,891 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 22:30:28,892 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 22:30:28,892 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 22:30:28,893 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 22:30:28,899 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 22:30:28,899 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 22:30:28,899 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 22:30:28,900 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 22:30:28,900 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 22:30:28,901 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 22:30:28,901 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 22:30:28,901 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 22:30:28,902 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 22:30:28,903 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 22:30:28,903 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 22:30:28,903 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 22:30:28,904 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 22:30:28,904 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 22:30:28,904 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 22:30:28,905 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 22:30:28,905 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 22:30:28,906 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-02 22:30:28,928 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 22:30:28,928 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 22:30:28,928 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 22:30:28,928 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 22:30:28,929 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 22:30:28,929 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 22:30:28,929 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 22:30:28,929 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 22:30:28,929 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 22:30:28,929 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 22:30:28,930 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 22:30:28,930 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 22:30:28,930 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 22:30:28,930 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 22:30:28,930 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 22:30:28,930 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 22:30:28,931 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 22:30:28,931 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 22:30:28,931 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 22:30:28,931 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 22:30:28,931 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 22:30:28,931 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 22:30:28,931 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 22:30:28,931 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 22:30:28,932 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 22:30:28,932 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 22:30:28,932 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 22:30:28,932 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 22:30:28,932 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 22:30:28,932 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 22:30:28,932 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 22:30:28,932 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 22:30:28,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 22:30:28,933 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 22:30:28,933 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 22:30:28,933 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 22:30:28,933 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 22:30:28,933 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 22:30:28,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 22:30:28,933 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 22:30:28,933 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 22:30:28,933 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 22:30:29,099 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 22:30:29,126 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 22:30:29,128 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 22:30:29,129 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 22:30:29,129 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 22:30:29,130 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/divbin2.i [2023-04-02 22:30:30,027 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 22:30:30,226 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 22:30:30,227 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/divbin2.i [2023-04-02 22:30:30,231 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/772721377/f58cada7273f4de0a9e9092ba86ac14c/FLAGd4d591002 [2023-04-02 22:30:30,246 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/772721377/f58cada7273f4de0a9e9092ba86ac14c [2023-04-02 22:30:30,248 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 22:30:30,249 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 22:30:30,251 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 22:30:30,251 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 22:30:30,253 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 22:30:30,253 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 10:30:30" (1/1) ... [2023-04-02 22:30:30,254 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a279ab0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:30:30, skipping insertion in model container [2023-04-02 22:30:30,255 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 10:30:30" (1/1) ... [2023-04-02 22:30:30,259 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 22:30:30,269 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 22:30:30,349 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/divbin2.i[951,964] [2023-04-02 22:30:30,356 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 22:30:30,362 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 22:30:30,369 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/divbin2.i[951,964] [2023-04-02 22:30:30,371 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 22:30:30,379 INFO L208 MainTranslator]: Completed translation [2023-04-02 22:30:30,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:30:30 WrapperNode [2023-04-02 22:30:30,379 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 22:30:30,380 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 22:30:30,380 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 22:30:30,380 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 22:30:30,387 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:30:30" (1/1) ... [2023-04-02 22:30:30,387 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:30:30" (1/1) ... [2023-04-02 22:30:30,390 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:30:30" (1/1) ... [2023-04-02 22:30:30,390 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:30:30" (1/1) ... [2023-04-02 22:30:30,393 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:30:30" (1/1) ... [2023-04-02 22:30:30,395 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:30:30" (1/1) ... [2023-04-02 22:30:30,395 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:30:30" (1/1) ... [2023-04-02 22:30:30,396 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:30:30" (1/1) ... [2023-04-02 22:30:30,397 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 22:30:30,397 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 22:30:30,397 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 22:30:30,397 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 22:30:30,398 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:30:30" (1/1) ... [2023-04-02 22:30:30,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 22:30:30,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:30:30,415 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 22:30:30,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 22:30:30,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 22:30:30,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 22:30:30,437 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 22:30:30,437 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 22:30:30,438 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 22:30:30,438 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 22:30:30,438 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 22:30:30,438 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 22:30:30,438 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-02 22:30:30,438 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-02 22:30:30,438 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 22:30:30,438 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 22:30:30,438 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-04-02 22:30:30,438 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 22:30:30,438 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 22:30:30,438 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 22:30:30,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 22:30:30,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 22:30:30,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 22:30:30,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 22:30:30,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 22:30:30,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 22:30:30,485 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 22:30:30,490 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 22:30:30,573 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 22:30:30,602 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 22:30:30,602 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-02 22:30:30,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 10:30:30 BoogieIcfgContainer [2023-04-02 22:30:30,604 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 22:30:30,605 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 22:30:30,605 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 22:30:30,607 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 22:30:30,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 10:30:30" (1/3) ... [2023-04-02 22:30:30,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33107a80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 10:30:30, skipping insertion in model container [2023-04-02 22:30:30,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:30:30" (2/3) ... [2023-04-02 22:30:30,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33107a80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 10:30:30, skipping insertion in model container [2023-04-02 22:30:30,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 10:30:30" (3/3) ... [2023-04-02 22:30:30,608 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin2.i [2023-04-02 22:30:30,619 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 22:30:30,619 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 22:30:30,646 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 22:30:30,650 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;@4ee363a2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 22:30:30,650 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 22:30:30,652 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 22:30:30,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-02 22:30:30,656 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:30:30,657 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:30:30,657 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:30:30,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:30:30,660 INFO L85 PathProgramCache]: Analyzing trace with hash 105489264, now seen corresponding path program 1 times [2023-04-02 22:30:30,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:30:30,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121449927] [2023-04-02 22:30:30,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:30:30,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:30:30,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:30:30,743 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:30:30,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121449927] [2023-04-02 22:30:30,743 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-04-02 22:30:30,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880703233] [2023-04-02 22:30:30,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:30:30,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:30:30,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:30:30,748 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:30:30,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 22:30:30,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:30:30,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-02 22:30:30,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:30:30,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:30:30,855 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 22:30:30,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880703233] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:30:30,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:30:30,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-02 22:30:30,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402097987] [2023-04-02 22:30:30,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:30:30,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-02 22:30:30,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:30:30,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-02 22:30:30,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 22:30:30,913 INFO L87 Difference]: Start difference. First operand has 21 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:30:30,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:30:30,936 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2023-04-02 22:30:30,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-02 22:30:30,938 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-02 22:30:30,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:30:30,942 INFO L225 Difference]: With dead ends: 35 [2023-04-02 22:30:30,942 INFO L226 Difference]: Without dead ends: 17 [2023-04-02 22:30:30,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 22:30:30,946 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:30:30,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:30:30,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-04-02 22:30:30,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-04-02 22:30:30,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 22:30:30,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2023-04-02 22:30:30,969 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2023-04-02 22:30:30,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:30:30,969 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2023-04-02 22:30:30,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:30:30,970 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2023-04-02 22:30:30,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-02 22:30:30,970 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:30:30,970 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:30:30,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 22:30:31,174 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 [2023-04-02 22:30:31,175 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:30:31,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:30:31,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1507134540, now seen corresponding path program 1 times [2023-04-02 22:30:31,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:30:31,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450548350] [2023-04-02 22:30:31,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:30:31,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:30:31,195 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:30:31,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1994543616] [2023-04-02 22:30:31,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:30:31,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:30:31,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:30:31,202 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:30:31,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 22:30:31,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:30:31,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2023-04-02 22:30:31,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:30:31,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:30:31,360 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 22:30:31,360 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:30:31,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450548350] [2023-04-02 22:30:31,360 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:30:31,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994543616] [2023-04-02 22:30:31,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994543616] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:30:31,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:30:31,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 22:30:31,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799639429] [2023-04-02 22:30:31,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:30:31,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 22:30:31,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:30:31,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 22:30:31,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-02 22:30:31,362 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:30:31,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:30:31,446 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2023-04-02 22:30:31,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 22:30:31,447 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-04-02 22:30:31,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:30:31,458 INFO L225 Difference]: With dead ends: 29 [2023-04-02 22:30:31,458 INFO L226 Difference]: Without dead ends: 26 [2023-04-02 22:30:31,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-02 22:30:31,467 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 7 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:30:31,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 39 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:30:31,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-04-02 22:30:31,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-04-02 22:30:31,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 22:30:31,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2023-04-02 22:30:31,484 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 12 [2023-04-02 22:30:31,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:30:31,484 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2023-04-02 22:30:31,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:30:31,484 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2023-04-02 22:30:31,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-02 22:30:31,485 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:30:31,485 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:30:31,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 22:30:31,686 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 [2023-04-02 22:30:31,686 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:30:31,686 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:30:31,687 INFO L85 PathProgramCache]: Analyzing trace with hash -177978609, now seen corresponding path program 1 times [2023-04-02 22:30:31,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:30:31,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693905714] [2023-04-02 22:30:31,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:30:31,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:30:31,705 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:30:31,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [703709657] [2023-04-02 22:30:31,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:30:31,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:30:31,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:30:31,720 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:30:31,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 22:30:31,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:30:31,768 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 15 conjunts are in the unsatisfiable core [2023-04-02 22:30:31,769 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:30:31,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:30:31,835 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:30:31,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:30:31,923 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:30:31,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693905714] [2023-04-02 22:30:31,924 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:30:31,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703709657] [2023-04-02 22:30:31,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703709657] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-02 22:30:31,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 22:30:31,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2023-04-02 22:30:31,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996303140] [2023-04-02 22:30:31,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:30:31,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 22:30:31,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:30:31,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 22:30:31,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-04-02 22:30:31,926 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:30:33,947 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 [1] [2023-04-02 22:30:35,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-04-02 22:30:37,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-04-02 22:30:40,004 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-04-02 22:30:42,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-04-02 22:30:42,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:30:42,202 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2023-04-02 22:30:42,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 22:30:42,202 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-04-02 22:30:42,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:30:42,203 INFO L225 Difference]: With dead ends: 36 [2023-04-02 22:30:42,203 INFO L226 Difference]: Without dead ends: 33 [2023-04-02 22:30:42,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-04-02 22:30:42,204 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2023-04-02 22:30:42,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 49 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 5 Unknown, 0 Unchecked, 10.2s Time] [2023-04-02 22:30:42,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-02 22:30:42,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2023-04-02 22:30:42,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 22:30:42,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2023-04-02 22:30:42,210 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2023-04-02 22:30:42,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:30:42,210 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2023-04-02 22:30:42,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 22:30:42,210 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2023-04-02 22:30:42,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-02 22:30:42,210 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:30:42,211 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:30:42,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 22:30:42,415 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 [2023-04-02 22:30:42,416 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:30:42,416 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:30:42,416 INFO L85 PathProgramCache]: Analyzing trace with hash -189899135, now seen corresponding path program 1 times [2023-04-02 22:30:42,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:30:42,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297530967] [2023-04-02 22:30:42,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:30:42,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:30:42,424 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:30:42,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2046020868] [2023-04-02 22:30:42,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:30:42,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:30:42,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:30:42,425 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:30:42,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 22:30:42,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:30:42,458 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 22:30:42,459 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:30:42,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:30:42,480 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 22:30:42,480 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:30:42,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297530967] [2023-04-02 22:30:42,480 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:30:42,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046020868] [2023-04-02 22:30:42,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046020868] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:30:42,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:30:42,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 22:30:42,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642237313] [2023-04-02 22:30:42,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:30:42,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 22:30:42,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:30:42,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 22:30:42,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 22:30:42,482 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 22:30:42,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:30:42,498 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2023-04-02 22:30:42,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 22:30:42,498 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2023-04-02 22:30:42,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:30:42,499 INFO L225 Difference]: With dead ends: 39 [2023-04-02 22:30:42,499 INFO L226 Difference]: Without dead ends: 26 [2023-04-02 22:30:42,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 22:30:42,500 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:30:42,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:30:42,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-04-02 22:30:42,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-04-02 22:30:42,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 22:30:42,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2023-04-02 22:30:42,505 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 19 [2023-04-02 22:30:42,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:30:42,505 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2023-04-02 22:30:42,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 22:30:42,506 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2023-04-02 22:30:42,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-02 22:30:42,506 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:30:42,506 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:30:42,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 22:30:42,711 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 [2023-04-02 22:30:42,711 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:30:42,712 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:30:42,712 INFO L85 PathProgramCache]: Analyzing trace with hash 758719174, now seen corresponding path program 1 times [2023-04-02 22:30:42,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:30:42,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338880904] [2023-04-02 22:30:42,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:30:42,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:30:42,742 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:30:42,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [391166083] [2023-04-02 22:30:42,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:30:42,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:30:42,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:30:42,743 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:30:42,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 22:30:42,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:30:42,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-02 22:30:42,817 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:30:42,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:30:42,963 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:30:43,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:30:43,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:30:43,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338880904] [2023-04-02 22:30:43,986 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 22:30:43,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391166083] [2023-04-02 22:30:43,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391166083] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:30:43,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1045632635] [2023-04-02 22:30:43,998 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-02 22:30:43,999 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:30:44,001 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:30:44,003 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:30:44,004 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:30:44,035 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 22:30:44,185 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 37 for LOIs [2023-04-02 22:30:44,248 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 22:30:44,251 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:30:46,733 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '726#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((v_main_~A~0_BEFORE_CALL_10 Int) (v_main_~b~0_BEFORE_CALL_11 Int) (v_main_~B~0_BEFORE_CALL_6 Int) (v_main_~r~0_BEFORE_CALL_10 Int) (v_main_~q~0_BEFORE_CALL_10 Int)) (and (or (and (= v_main_~q~0_BEFORE_CALL_10 0) (<= 1 |#StackHeapBarrier|) (= v_main_~r~0_BEFORE_CALL_10 v_main_~A~0_BEFORE_CALL_10) (= |#NULL.offset| 0) (= v_main_~B~0_BEFORE_CALL_6 1) (= |#NULL.base| 0)) (and (<= 1 (+ v_main_~q~0_BEFORE_CALL_10 |#StackHeapBarrier|)) (<= 1 |#StackHeapBarrier|) (<= 0 v_main_~q~0_BEFORE_CALL_10) (= |#NULL.offset| 0) (= v_main_~B~0_BEFORE_CALL_6 1) (= |#NULL.base| 0))) (not (= (mod v_main_~A~0_BEFORE_CALL_10 4294967296) (mod (+ v_main_~r~0_BEFORE_CALL_10 (* v_main_~q~0_BEFORE_CALL_10 v_main_~b~0_BEFORE_CALL_11)) 4294967296))))))' at error location [2023-04-02 22:30:46,734 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:30:46,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 22:30:46,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-04-02 22:30:46,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143585144] [2023-04-02 22:30:46,734 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 22:30:46,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 22:30:46,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:30:46,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 22:30:46,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2023-04-02 22:30:46,735 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 12 states have internal predecessors, (25), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 22:31:01,494 WARN L223 SmtUtils]: Spent 14.22s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 22:31:04,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:31:10,902 WARN L223 SmtUtils]: Spent 6.13s on a formula simplification that was a NOOP. DAG size: 25 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 22:31:12,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 22:31:17,891 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 [] [2023-04-02 22:31:19,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:31:19,152 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2023-04-02 22:31:19,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-02 22:31:19,152 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 12 states have internal predecessors, (25), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 21 [2023-04-02 22:31:19,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:31:19,154 INFO L225 Difference]: With dead ends: 63 [2023-04-02 22:31:19,154 INFO L226 Difference]: Without dead ends: 59 [2023-04-02 22:31:19,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 25.9s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2023-04-02 22:31:19,155 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 20 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 19 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2023-04-02 22:31:19,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 110 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 154 Invalid, 1 Unknown, 0 Unchecked, 9.8s Time] [2023-04-02 22:31:19,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-04-02 22:31:19,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 47. [2023-04-02 22:31:19,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 36 states have internal predecessors, (39), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 22:31:19,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2023-04-02 22:31:19,179 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 21 [2023-04-02 22:31:19,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:31:19,179 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2023-04-02 22:31:19,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 12 states have internal predecessors, (25), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 22:31:19,180 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2023-04-02 22:31:19,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-02 22:31:19,181 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:31:19,181 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:31:19,186 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-02 22:31:19,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:31:19,382 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:31:19,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:31:19,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1494059217, now seen corresponding path program 2 times [2023-04-02 22:31:19,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:31:19,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536754623] [2023-04-02 22:31:19,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:31:19,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:31:19,390 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 22:31:19,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1808809826] [2023-04-02 22:31:19,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 22:31:19,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:31:19,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:31:19,393 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:31:19,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process