/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-scaling/prodbin-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 23:22:13,819 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 23:22:13,821 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 23:22:13,854 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 23:22:13,854 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 23:22:13,856 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 23:22:13,859 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 23:22:13,860 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 23:22:13,861 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 23:22:13,865 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 23:22:13,866 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 23:22:13,867 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 23:22:13,867 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 23:22:13,870 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 23:22:13,870 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 23:22:13,871 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 23:22:13,872 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 23:22:13,872 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 23:22:13,874 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 23:22:13,878 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 23:22:13,879 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 23:22:13,880 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 23:22:13,880 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 23:22:13,881 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 23:22:13,888 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 23:22:13,890 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 23:22:13,890 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 23:22:13,891 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 23:22:13,892 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 23:22:13,892 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 23:22:13,892 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 23:22:13,893 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 23:22:13,893 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 23:22:13,893 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 23:22:13,893 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 23:22:13,894 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 23:22:13,894 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 23:22:13,918 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 23:22:13,919 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 23:22:13,919 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 23:22:13,919 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 23:22:13,920 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 23:22:13,920 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 23:22:13,920 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 23:22:13,920 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 23:22:13,920 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 23:22:13,920 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 23:22:13,921 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 23:22:13,921 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 23:22:13,921 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 23:22:13,921 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 23:22:13,921 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 23:22:13,921 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 23:22:13,921 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 23:22:13,921 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 23:22:13,922 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 23:22:13,922 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 23:22:13,922 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 23:22:13,922 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 23:22:13,922 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 23:22:13,922 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 23:22:13,922 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 23:22:13,923 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 23:22:13,923 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 23:22:13,923 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 23:22:13,923 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 23:22:13,923 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 23:22:13,923 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 23:22:13,923 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 23:22:13,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:22:13,923 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 23:22:13,923 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 23:22:13,924 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 23:22:13,924 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 23:22:13,924 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 23:22:13,924 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 23:22:13,924 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 23:22:13,924 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 23:22:13,924 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 23:22:14,093 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 23:22:14,111 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 23:22:14,112 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 23:22:14,113 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 23:22:14,116 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 23:22:14,117 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound10.c [2023-04-02 23:22:15,199 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 23:22:15,334 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 23:22:15,334 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound10.c [2023-04-02 23:22:15,338 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44dbb8b40/4f084f7b306547f688ba7941c2a2b57c/FLAGa96703b93 [2023-04-02 23:22:15,348 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44dbb8b40/4f084f7b306547f688ba7941c2a2b57c [2023-04-02 23:22:15,350 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 23:22:15,351 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 23:22:15,351 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 23:22:15,351 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 23:22:15,354 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 23:22:15,354 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:22:15" (1/1) ... [2023-04-02 23:22:15,355 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55d56a07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:22:15, skipping insertion in model container [2023-04-02 23:22:15,355 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:22:15" (1/1) ... [2023-04-02 23:22:15,360 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 23:22:15,369 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 23:22:15,458 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_unwindbound10.c[1175,1188] [2023-04-02 23:22:15,467 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:22:15,473 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 23:22:15,481 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_unwindbound10.c[1175,1188] [2023-04-02 23:22:15,484 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:22:15,493 INFO L208 MainTranslator]: Completed translation [2023-04-02 23:22:15,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:22:15 WrapperNode [2023-04-02 23:22:15,494 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 23:22:15,495 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 23:22:15,495 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 23:22:15,495 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 23:22:15,503 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:22:15" (1/1) ... [2023-04-02 23:22:15,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:22:15" (1/1) ... [2023-04-02 23:22:15,507 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:22:15" (1/1) ... [2023-04-02 23:22:15,507 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:22:15" (1/1) ... [2023-04-02 23:22:15,509 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:22:15" (1/1) ... [2023-04-02 23:22:15,511 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:22:15" (1/1) ... [2023-04-02 23:22:15,513 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:22:15" (1/1) ... [2023-04-02 23:22:15,513 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:22:15" (1/1) ... [2023-04-02 23:22:15,514 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 23:22:15,515 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 23:22:15,515 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 23:22:15,515 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 23:22:15,516 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:22:15" (1/1) ... [2023-04-02 23:22:15,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:22:15,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:22:15,545 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 23:22:15,550 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 23:22:15,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 23:22:15,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 23:22:15,589 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 23:22:15,592 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 23:22:15,592 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 23:22:15,592 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 23:22:15,592 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 23:22:15,592 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 23:22:15,593 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 23:22:15,593 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 23:22:15,593 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 23:22:15,593 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 23:22:15,593 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 23:22:15,593 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 23:22:15,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 23:22:15,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 23:22:15,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 23:22:15,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 23:22:15,593 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 23:22:15,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 23:22:15,652 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 23:22:15,654 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 23:22:15,794 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 23:22:15,823 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 23:22:15,823 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 23:22:15,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:22:15 BoogieIcfgContainer [2023-04-02 23:22:15,825 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 23:22:15,827 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 23:22:15,827 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 23:22:15,829 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 23:22:15,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 11:22:15" (1/3) ... [2023-04-02 23:22:15,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@601e0216 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:22:15, skipping insertion in model container [2023-04-02 23:22:15,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:22:15" (2/3) ... [2023-04-02 23:22:15,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@601e0216 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:22:15, skipping insertion in model container [2023-04-02 23:22:15,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:22:15" (3/3) ... [2023-04-02 23:22:15,831 INFO L112 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound10.c [2023-04-02 23:22:15,859 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 23:22:15,859 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 23:22:15,902 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 23:22:15,906 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;@763a8d2b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 23:22:15,906 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 23:22:15,913 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 23:22:15,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-02 23:22:15,919 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:22:15,919 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:22:15,920 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:22:15,926 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:22:15,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1592022381, now seen corresponding path program 1 times [2023-04-02 23:22:15,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:22:15,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609536285] [2023-04-02 23:22:15,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:22:15,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:22:16,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:22:16,049 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:22:16,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609536285] [2023-04-02 23:22:16,050 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-04-02 23:22:16,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528626519] [2023-04-02 23:22:16,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:22:16,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:22:16,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:22:16,053 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 23:22:16,054 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 23:22:16,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:22:16,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-02 23:22:16,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:22:16,146 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 23:22:16,147 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:22:16,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528626519] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:22:16,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:22:16,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-02 23:22:16,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054403688] [2023-04-02 23:22:16,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:22:16,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-02 23:22:16,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:22:16,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-02 23:22:16,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 23:22:16,174 INFO L87 Difference]: Start difference. First operand has 24 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 23:22:16,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:22:16,193 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2023-04-02 23:22:16,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-02 23:22:16,194 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2023-04-02 23:22:16,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:22:16,199 INFO L225 Difference]: With dead ends: 39 [2023-04-02 23:22:16,199 INFO L226 Difference]: Without dead ends: 20 [2023-04-02 23:22:16,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 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 23:22:16,203 INFO L413 NwaCegarLoop]: 22 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, 22 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 [2023-04-02 23:22:16,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 23:22:16,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-04-02 23:22:16,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-04-02 23:22:16,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 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 23:22:16,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2023-04-02 23:22:16,225 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 14 [2023-04-02 23:22:16,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:22:16,226 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2023-04-02 23:22:16,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 23:22:16,226 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2023-04-02 23:22:16,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-02 23:22:16,226 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:22:16,226 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:22:16,246 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 23:22:16,431 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 23:22:16,432 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:22:16,433 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:22:16,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1575986811, now seen corresponding path program 1 times [2023-04-02 23:22:16,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:22:16,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804307973] [2023-04-02 23:22:16,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:22:16,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:22:16,460 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:22:16,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [330179616] [2023-04-02 23:22:16,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:22:16,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:22:16,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:22:16,480 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 23:22:16,481 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 23:22:16,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:22:16,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 23:22:16,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:22:16,633 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 23:22:16,633 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:22:16,634 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:22:16,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804307973] [2023-04-02 23:22:16,634 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:22:16,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330179616] [2023-04-02 23:22:16,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330179616] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:22:16,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:22:16,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 23:22:16,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216422845] [2023-04-02 23:22:16,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:22:16,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:22:16,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:22:16,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:22:16,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:22:16,636 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 23:22:16,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:22:16,670 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2023-04-02 23:22:16,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 23:22:16,671 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2023-04-02 23:22:16,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:22:16,672 INFO L225 Difference]: With dead ends: 29 [2023-04-02 23:22:16,672 INFO L226 Difference]: Without dead ends: 22 [2023-04-02 23:22:16,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:22:16,673 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 23:22:16,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 23:22:16,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-04-02 23:22:16,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-04-02 23:22:16,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 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 23:22:16,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2023-04-02 23:22:16,678 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2023-04-02 23:22:16,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:22:16,678 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2023-04-02 23:22:16,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 23:22:16,678 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2023-04-02 23:22:16,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-02 23:22:16,679 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:22:16,679 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:22:16,685 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-02 23:22:16,884 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 23:22:16,885 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:22:16,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:22:16,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1577774271, now seen corresponding path program 1 times [2023-04-02 23:22:16,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:22:16,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198556618] [2023-04-02 23:22:16,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:22:16,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:22:16,899 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:22:16,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [199833195] [2023-04-02 23:22:16,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:22:16,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:22:16,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:22:16,912 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 23:22:16,917 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 23:22:16,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:22:16,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 19 conjunts are in the unsatisfiable core [2023-04-02 23:22:16,966 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:22:17,088 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 23:22:17,088 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:22:17,088 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:22:17,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198556618] [2023-04-02 23:22:17,088 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:22:17,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199833195] [2023-04-02 23:22:17,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199833195] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:22:17,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:22:17,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 23:22:17,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160258201] [2023-04-02 23:22:17,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:22:17,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 23:22:17,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:22:17,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 23:22:17,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:22:17,090 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 23:22:17,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:22:17,164 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2023-04-02 23:22:17,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 23:22:17,165 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2023-04-02 23:22:17,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:22:17,166 INFO L225 Difference]: With dead ends: 35 [2023-04-02 23:22:17,166 INFO L226 Difference]: Without dead ends: 28 [2023-04-02 23:22:17,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:22:17,167 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 11 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:22:17,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 58 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:22:17,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-02 23:22:17,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-04-02 23:22:17,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 23:22:17,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2023-04-02 23:22:17,174 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 15 [2023-04-02 23:22:17,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:22:17,174 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2023-04-02 23:22:17,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 23:22:17,175 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2023-04-02 23:22:17,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-02 23:22:17,175 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:22:17,175 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:22:17,198 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 23:22:17,382 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 23:22:17,383 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:22:17,383 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:22:17,383 INFO L85 PathProgramCache]: Analyzing trace with hash 146461537, now seen corresponding path program 1 times [2023-04-02 23:22:17,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:22:17,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130529001] [2023-04-02 23:22:17,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:22:17,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:22:17,395 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:22:17,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1162089899] [2023-04-02 23:22:17,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:22:17,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:22:17,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:22:17,409 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 23:22:17,410 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 23:22:17,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:22:17,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 23:22:17,476 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:22:17,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:22:17,535 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:22:17,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:22:17,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:22:17,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130529001] [2023-04-02 23:22:17,610 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:22:17,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162089899] [2023-04-02 23:22:17,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162089899] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:22:17,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [340611465] [2023-04-02 23:22:17,629 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-02 23:22:17,629 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:22:17,631 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:22:17,641 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:22:17,641 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:22:17,732 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 23:22:18,563 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 23:22:18,567 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 27 for LOIs [2023-04-02 23:22:18,572 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 23:22:18,577 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:22:19,150 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '557#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 23:22:19,151 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:22:19,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:22:19,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-04-02 23:22:19,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356511563] [2023-04-02 23:22:19,151 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 23:22:19,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 23:22:19,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:22:19,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 23:22:19,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2023-04-02 23:22:19,153 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-02 23:22:19,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:22:19,223 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2023-04-02 23:22:19,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 23:22:19,224 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 23 [2023-04-02 23:22:19,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:22:19,225 INFO L225 Difference]: With dead ends: 59 [2023-04-02 23:22:19,225 INFO L226 Difference]: Without dead ends: 52 [2023-04-02 23:22:19,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2023-04-02 23:22:19,226 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 25 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 23:22:19,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 59 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 23:22:19,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-04-02 23:22:19,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2023-04-02 23:22:19,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 34 states have internal predecessors, (38), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 23:22:19,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2023-04-02 23:22:19,232 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 23 [2023-04-02 23:22:19,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:22:19,232 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2023-04-02 23:22:19,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-02 23:22:19,233 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2023-04-02 23:22:19,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-02 23:22:19,233 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:22:19,233 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:22:19,253 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 23:22:19,438 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 23:22:19,439 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:22:19,439 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:22:19,439 INFO L85 PathProgramCache]: Analyzing trace with hash 148248997, now seen corresponding path program 1 times [2023-04-02 23:22:19,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:22:19,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028040233] [2023-04-02 23:22:19,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:22:19,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:22:19,464 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:22:19,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1002129042] [2023-04-02 23:22:19,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:22:19,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:22:19,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:22:19,478 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 23:22:19,514 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 23:22:19,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:22:19,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2023-04-02 23:22:19,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:22:19,999 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:22:19,999 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:22:24,534 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:22:24,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:22:24,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028040233] [2023-04-02 23:22:24,535 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:22:24,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002129042] [2023-04-02 23:22:24,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002129042] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:22:24,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [724643924] [2023-04-02 23:22:24,537 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 23:22:24,537 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:22:24,537 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:22:24,537 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:22:24,538 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:22:24,554 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 23:22:24,991 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 80 for LOIs [2023-04-02 23:22:25,095 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 27 for LOIs [2023-04-02 23:22:25,098 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 23:22:25,101 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:22:29,424 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '883#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((v_main_~a~0_BEFORE_CALL_25 Int) (|v_old(~counter~0)_BEFORE_CALL_20| Int) (v_main_~x~0_BEFORE_CALL_18 Int) (v_main_~z~0_BEFORE_CALL_19 Int) (v_main_~y~0_BEFORE_CALL_18 Int) (v_main_~b~0_BEFORE_CALL_25 Int)) (and (not (= (* v_main_~a~0_BEFORE_CALL_25 v_main_~b~0_BEFORE_CALL_25) (+ v_main_~z~0_BEFORE_CALL_19 (* v_main_~y~0_BEFORE_CALL_18 v_main_~x~0_BEFORE_CALL_18)))) (exists ((|v_main_#t~post6_20| Int)) (and (or (and (<= v_main_~a~0_BEFORE_CALL_25 2147483647) (<= 1 |v_main_#t~post6_20|) (<= 0 (+ v_main_~a~0_BEFORE_CALL_25 2147483648)) (<= v_main_~b~0_BEFORE_CALL_25 2147483647) (<= 1 |#StackHeapBarrier|) (<= 0 (+ v_main_~a~0_BEFORE_CALL_25 2147483647 |v_main_#t~post6_20|)) (<= v_main_~b~0_BEFORE_CALL_25 (+ |v_main_#t~post6_20| 2147483646)) (<= v_main_~b~0_BEFORE_CALL_25 (+ v_main_~a~0_BEFORE_CALL_25 4294967295)) (<= 2 (+ |#StackHeapBarrier| v_main_~b~0_BEFORE_CALL_25)) (<= 2 (+ |v_main_#t~post6_20| v_main_~b~0_BEFORE_CALL_25)) (<= (+ v_main_~a~0_BEFORE_CALL_25 v_main_~b~0_BEFORE_CALL_25) 4294967294) (<= v_main_~a~0_BEFORE_CALL_25 (+ v_main_~b~0_BEFORE_CALL_25 2147483646)) (<= v_main_~a~0_BEFORE_CALL_25 (+ |#StackHeapBarrier| 2147483646)) (<= 0 (+ v_main_~a~0_BEFORE_CALL_25 2147483647 |#StackHeapBarrier|)) (<= v_main_~b~0_BEFORE_CALL_25 (+ |#StackHeapBarrier| 2147483646)) (<= v_main_~a~0_BEFORE_CALL_25 (+ |v_main_#t~post6_20| 2147483646)) (<= 2 (+ |v_main_#t~post6_20| |#StackHeapBarrier|)) (= ~counter~0 (+ |v_main_#t~post6_20| 1)) (= |#NULL.offset| 0) (<= 1 v_main_~b~0_BEFORE_CALL_25) (= |v_old(~counter~0)_BEFORE_CALL_20| 0) (<= 0 (+ v_main_~a~0_BEFORE_CALL_25 2147483647 v_main_~b~0_BEFORE_CALL_25)) (= |#NULL.base| 0)) (and (<= v_main_~a~0_BEFORE_CALL_25 2147483647) (= v_main_~y~0_BEFORE_CALL_18 v_main_~b~0_BEFORE_CALL_25) (<= 0 (+ v_main_~a~0_BEFORE_CALL_25 2147483648)) (<= v_main_~b~0_BEFORE_CALL_25 2147483647) (<= 1 |#StackHeapBarrier|) (= |v_main_#t~post6_20| 0) (= v_main_~z~0_BEFORE_CALL_19 0) (= |#NULL.offset| 0) (<= 1 v_main_~b~0_BEFORE_CALL_25) (= |v_old(~counter~0)_BEFORE_CALL_20| 0) (= ~counter~0 1) (= v_main_~a~0_BEFORE_CALL_25 v_main_~x~0_BEFORE_CALL_18) (= |#NULL.base| 0))) (< |v_main_#t~post6_20| 10))))))' at error location [2023-04-02 23:22:29,424 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:22:29,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:22:29,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2023-04-02 23:22:29,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831493315] [2023-04-02 23:22:29,425 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 23:22:29,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-02 23:22:29,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:22:29,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-02 23:22:29,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2023-04-02 23:22:29,426 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 12 states have internal predecessors, (25), 5 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-02 23:22:30,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 23:22:32,968 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 23:22:39,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:22:39,254 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2023-04-02 23:22:39,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 23:22:39,254 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 12 states have internal predecessors, (25), 5 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 23 [2023-04-02 23:22:39,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:22:39,256 INFO L225 Difference]: With dead ends: 64 [2023-04-02 23:22:39,256 INFO L226 Difference]: Without dead ends: 58 [2023-04-02 23:22:39,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=153, Invalid=1107, Unknown=0, NotChecked=0, Total=1260 [2023-04-02 23:22:39,257 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 34 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-04-02 23:22:39,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 111 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 146 Invalid, 1 Unknown, 0 Unchecked, 3.6s Time] [2023-04-02 23:22:39,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-04-02 23:22:39,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2023-04-02 23:22:39,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 38 states have internal predecessors, (41), 10 states have call successors, (10), 9 states have call predecessors, (10), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-02 23:22:39,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2023-04-02 23:22:39,265 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 23 [2023-04-02 23:22:39,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:22:39,265 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2023-04-02 23:22:39,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 12 states have internal predecessors, (25), 5 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-02 23:22:39,266 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2023-04-02 23:22:39,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-02 23:22:39,266 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:22:39,266 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:22:39,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 23:22:39,466 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 23:22:39,467 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:22:39,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:22:39,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1643415243, now seen corresponding path program 1 times [2023-04-02 23:22:39,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:22:39,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405236607] [2023-04-02 23:22:39,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:22:39,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:22:39,481 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:22:39,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1481754856] [2023-04-02 23:22:39,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:22:39,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:22:39,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:22:39,493 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 23:22:39,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 23:22:39,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:22:39,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-02 23:22:39,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:22:39,581 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 23:22:39,583 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:22:39,666 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 23:22:39,666 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:22:39,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405236607] [2023-04-02 23:22:39,666 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:22:39,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481754856] [2023-04-02 23:22:39,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481754856] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:22:39,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [116013603] [2023-04-02 23:22:39,668 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-02 23:22:39,668 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:22:39,668 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:22:39,668 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:22:39,668 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:22:39,683 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 23:22:40,035 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 23:22:40,040 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 27 for LOIs [2023-04-02 23:22:40,043 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 23:22:40,046 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:22:40,614 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1259#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 23:22:40,614 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:22:40,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:22:40,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2023-04-02 23:22:40,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140923840] [2023-04-02 23:22:40,615 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 23:22:40,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 23:22:40,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:22:40,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 23:22:40,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2023-04-02 23:22:40,616 INFO L87 Difference]: Start difference. First operand 54 states and 58 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-02 23:22:40,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:22:40,693 INFO L93 Difference]: Finished difference Result 61 states and 64 transitions. [2023-04-02 23:22:40,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 23:22:40,694 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 29 [2023-04-02 23:22:40,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:22:40,694 INFO L225 Difference]: With dead ends: 61 [2023-04-02 23:22:40,694 INFO L226 Difference]: Without dead ends: 51 [2023-04-02 23:22:40,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2023-04-02 23:22:40,695 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 15 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:22:40,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 82 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:22:40,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-04-02 23:22:40,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-04-02 23:22:40,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 36 states have internal predecessors, (36), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-02 23:22:40,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2023-04-02 23:22:40,701 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 29 [2023-04-02 23:22:40,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:22:40,701 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2023-04-02 23:22:40,701 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-02 23:22:40,701 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2023-04-02 23:22:40,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-02 23:22:40,702 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:22:40,702 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:22:40,709 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-04-02 23:22:40,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:22:40,907 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:22:40,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:22:40,907 INFO L85 PathProgramCache]: Analyzing trace with hash -619530733, now seen corresponding path program 2 times [2023-04-02 23:22:40,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:22:40,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902332883] [2023-04-02 23:22:40,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:22:40,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:22:40,915 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:22:40,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1500108626] [2023-04-02 23:22:40,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 23:22:40,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:22:40,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:22:40,916 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:22:40,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 23:22:40,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-04-02 23:22:40,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 23:22:40,979 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-02 23:22:40,981 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:22:41,039 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:22:41,039 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:22:41,130 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-02 23:22:41,130 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:22:41,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902332883] [2023-04-02 23:22:41,130 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:22:41,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500108626] [2023-04-02 23:22:41,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500108626] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:22:41,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [288100299] [2023-04-02 23:22:41,134 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-02 23:22:41,134 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:22:41,134 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:22:41,134 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:22:41,134 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:22:41,149 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 23:22:41,511 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 23:22:41,513 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 27 for LOIs [2023-04-02 23:22:41,517 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 23:22:41,520 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:22:42,007 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1730#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 23:22:42,007 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:22:42,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:22:42,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-04-02 23:22:42,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747541270] [2023-04-02 23:22:42,007 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 23:22:42,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 23:22:42,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:22:42,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 23:22:42,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2023-04-02 23:22:42,009 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 12 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2023-04-02 23:22:42,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:22:42,207 INFO L93 Difference]: Finished difference Result 111 states and 117 transitions. [2023-04-02 23:22:42,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-02 23:22:42,207 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 12 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) Word has length 47 [2023-04-02 23:22:42,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:22:42,209 INFO L225 Difference]: With dead ends: 111 [2023-04-02 23:22:42,209 INFO L226 Difference]: Without dead ends: 104 [2023-04-02 23:22:42,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=305, Invalid=1177, Unknown=0, NotChecked=0, Total=1482 [2023-04-02 23:22:42,212 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 48 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:22:42,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 98 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:22:42,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-04-02 23:22:42,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2023-04-02 23:22:42,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 67 states have (on average 1.1044776119402986) internal successors, (74), 68 states have internal predecessors, (74), 14 states have call successors, (14), 13 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-02 23:22:42,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions. [2023-04-02 23:22:42,219 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 47 [2023-04-02 23:22:42,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:22:42,219 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 100 transitions. [2023-04-02 23:22:42,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 12 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2023-04-02 23:22:42,219 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions. [2023-04-02 23:22:42,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-02 23:22:42,220 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:22:42,220 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:22:42,227 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-04-02 23:22:42,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:22:42,425 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:22:42,425 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:22:42,425 INFO L85 PathProgramCache]: Analyzing trace with hash -617743273, now seen corresponding path program 2 times [2023-04-02 23:22:42,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:22:42,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655208200] [2023-04-02 23:22:42,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:22:42,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:22:42,433 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:22:42,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [696754021] [2023-04-02 23:22:42,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 23:22:42,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:22:42,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:22:42,435 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:22:42,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 23:22:42,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-04-02 23:22:42,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 23:22:42,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 38 conjunts are in the unsatisfiable core [2023-04-02 23:22:42,502 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:22:43,410 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 16 proven. 37 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 23:22:43,410 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:22:49,782 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:22:49,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655208200] [2023-04-02 23:22:49,782 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:22:49,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696754021] [2023-04-02 23:22:49,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696754021] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:22:49,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [534550822] [2023-04-02 23:22:49,783 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 23:22:49,783 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:22:49,783 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:22:49,784 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:22:49,784 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:22:49,795 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 23:22:50,109 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 80 for LOIs [2023-04-02 23:22:50,188 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 27 for LOIs [2023-04-02 23:22:50,191 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 23:22:50,193 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:22:51,931 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2227#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((v_main_~x~0_BEFORE_CALL_42 Int) (v_main_~b~0_BEFORE_CALL_64 Int) (v_main_~z~0_BEFORE_CALL_47 Int) (|v_old(~counter~0)_BEFORE_CALL_52| Int) (v_main_~y~0_BEFORE_CALL_46 Int) (v_main_~a~0_BEFORE_CALL_62 Int)) (and (exists ((|v_main_#t~post6_40| Int)) (and (or (and (<= 1 |#StackHeapBarrier|) (<= 1 |v_main_#t~post6_40|) (<= 2 (+ |#StackHeapBarrier| v_main_~b~0_BEFORE_CALL_64)) (<= v_main_~a~0_BEFORE_CALL_62 (+ v_main_~b~0_BEFORE_CALL_64 2147483646)) (<= v_main_~b~0_BEFORE_CALL_64 2147483647) (<= 2 (+ |v_main_#t~post6_40| |#StackHeapBarrier|)) (<= 0 (+ v_main_~a~0_BEFORE_CALL_62 2147483647 |v_main_#t~post6_40|)) (<= 0 (+ v_main_~a~0_BEFORE_CALL_62 2147483647 v_main_~b~0_BEFORE_CALL_64)) (<= 1 v_main_~b~0_BEFORE_CALL_64) (<= 2 (+ |v_main_#t~post6_40| v_main_~b~0_BEFORE_CALL_64)) (<= v_main_~b~0_BEFORE_CALL_64 (+ |v_main_#t~post6_40| 2147483646)) (<= v_main_~b~0_BEFORE_CALL_64 (+ v_main_~a~0_BEFORE_CALL_62 4294967295)) (<= v_main_~a~0_BEFORE_CALL_62 2147483647) (<= 0 (+ v_main_~a~0_BEFORE_CALL_62 2147483647 |#StackHeapBarrier|)) (<= 0 (+ v_main_~a~0_BEFORE_CALL_62 2147483648)) (<= v_main_~a~0_BEFORE_CALL_62 (+ |#StackHeapBarrier| 2147483646)) (= |#NULL.offset| 0) (<= (+ v_main_~a~0_BEFORE_CALL_62 v_main_~b~0_BEFORE_CALL_64) 4294967294) (= ~counter~0 (+ |v_main_#t~post6_40| 1)) (<= v_main_~b~0_BEFORE_CALL_64 (+ |#StackHeapBarrier| 2147483646)) (= |v_old(~counter~0)_BEFORE_CALL_52| 0) (<= v_main_~a~0_BEFORE_CALL_62 (+ |v_main_#t~post6_40| 2147483646)) (= |#NULL.base| 0)) (and (<= 1 |#StackHeapBarrier|) (= v_main_~a~0_BEFORE_CALL_62 v_main_~x~0_BEFORE_CALL_42) (<= v_main_~b~0_BEFORE_CALL_64 2147483647) (= |v_main_#t~post6_40| 0) (= v_main_~y~0_BEFORE_CALL_46 v_main_~b~0_BEFORE_CALL_64) (= v_main_~z~0_BEFORE_CALL_47 0) (<= 1 v_main_~b~0_BEFORE_CALL_64) (<= v_main_~a~0_BEFORE_CALL_62 2147483647) (<= 0 (+ v_main_~a~0_BEFORE_CALL_62 2147483648)) (= |#NULL.offset| 0) (= ~counter~0 1) (= |v_old(~counter~0)_BEFORE_CALL_52| 0) (= |#NULL.base| 0))) (< |v_main_#t~post6_40| 10))) (not (= (+ v_main_~z~0_BEFORE_CALL_47 (* v_main_~y~0_BEFORE_CALL_46 v_main_~x~0_BEFORE_CALL_42)) (* v_main_~a~0_BEFORE_CALL_62 v_main_~b~0_BEFORE_CALL_64))))))' at error location [2023-04-02 23:22:51,932 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:22:51,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:22:51,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-04-02 23:22:51,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308415541] [2023-04-02 23:22:51,932 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 23:22:51,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 23:22:51,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:22:51,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 23:22:51,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=997, Unknown=1, NotChecked=0, Total=1122 [2023-04-02 23:22:51,941 INFO L87 Difference]: Start difference. First operand 94 states and 100 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-02 23:22:54,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 23:22:59,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:22:59,466 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2023-04-02 23:22:59,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 23:22:59,466 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 47 [2023-04-02 23:22:59,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:22:59,467 INFO L225 Difference]: With dead ends: 96 [2023-04-02 23:22:59,467 INFO L226 Difference]: Without dead ends: 94 [2023-04-02 23:22:59,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=172, Invalid=1309, Unknown=1, NotChecked=0, Total=1482 [2023-04-02 23:22:59,468 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 22 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-04-02 23:22:59,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 99 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-04-02 23:22:59,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-04-02 23:22:59,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2023-04-02 23:22:59,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 68 states have internal predecessors, (73), 14 states have call successors, (14), 13 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-02 23:22:59,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 99 transitions. [2023-04-02 23:22:59,477 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 99 transitions. Word has length 47 [2023-04-02 23:22:59,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:22:59,477 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 99 transitions. [2023-04-02 23:22:59,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-02 23:22:59,477 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 99 transitions. [2023-04-02 23:22:59,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-02 23:22:59,478 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:22:59,478 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:22:59,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-04-02 23:22:59,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-04-02 23:22:59,683 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:22:59,683 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:22:59,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1105456835, now seen corresponding path program 3 times [2023-04-02 23:22:59,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:22:59,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925989026] [2023-04-02 23:22:59,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:22:59,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:22:59,705 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:22:59,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [943298972] [2023-04-02 23:22:59,705 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 23:22:59,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:22:59,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:22:59,710 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:22:59,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-02 23:23:00,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 23:23:00,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 23:23:00,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 72 conjunts are in the unsatisfiable core [2023-04-02 23:23:00,022 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:23:49,871 WARN L223 SmtUtils]: Spent 8.70s on a formula simplification. DAG size of input: 181 DAG size of output: 167 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 23:24:22,724 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 5 proven. 60 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-04-02 23:24:22,724 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:24:44,966 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:24:44,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925989026] [2023-04-02 23:24:44,967 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:24:44,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943298972] [2023-04-02 23:24:44,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943298972] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:24:44,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [849706368] [2023-04-02 23:24:44,973 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 23:24:44,973 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:24:44,973 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:24:44,973 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:24:44,973 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:24:44,993 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 23:24:45,283 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 80 for LOIs [2023-04-02 23:24:45,360 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 27 for LOIs [2023-04-02 23:24:45,363 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 23:24:45,365 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:24:50,002 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2752#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((v_main_~z~0_BEFORE_CALL_61 Int) (v_main_~a~0_BEFORE_CALL_79 Int) (v_main_~y~0_BEFORE_CALL_60 Int) (|v_old(~counter~0)_BEFORE_CALL_62| Int) (v_main_~b~0_BEFORE_CALL_81 Int) (v_main_~x~0_BEFORE_CALL_56 Int)) (and (not (= (* v_main_~a~0_BEFORE_CALL_79 v_main_~b~0_BEFORE_CALL_81) (+ (* v_main_~y~0_BEFORE_CALL_60 v_main_~x~0_BEFORE_CALL_56) v_main_~z~0_BEFORE_CALL_61))) (exists ((|v_main_#t~post6_46| Int)) (and (< |v_main_#t~post6_46| 10) (or (and (<= 2 (+ |v_main_#t~post6_46| v_main_~b~0_BEFORE_CALL_81)) (<= 1 |#StackHeapBarrier|) (<= v_main_~a~0_BEFORE_CALL_79 (+ v_main_~b~0_BEFORE_CALL_81 2147483646)) (<= 2 (+ |v_main_#t~post6_46| |#StackHeapBarrier|)) (<= v_main_~b~0_BEFORE_CALL_81 (+ |#StackHeapBarrier| 2147483646)) (= ~counter~0 (+ |v_main_#t~post6_46| 1)) (<= v_main_~b~0_BEFORE_CALL_81 (+ v_main_~a~0_BEFORE_CALL_79 4294967295)) (<= 0 (+ v_main_~a~0_BEFORE_CALL_79 2147483648)) (= |v_old(~counter~0)_BEFORE_CALL_62| 0) (<= v_main_~a~0_BEFORE_CALL_79 (+ |v_main_#t~post6_46| 2147483646)) (<= v_main_~b~0_BEFORE_CALL_81 (+ |v_main_#t~post6_46| 2147483646)) (<= (+ v_main_~a~0_BEFORE_CALL_79 v_main_~b~0_BEFORE_CALL_81) 4294967294) (<= 1 v_main_~b~0_BEFORE_CALL_81) (<= 2 (+ |#StackHeapBarrier| v_main_~b~0_BEFORE_CALL_81)) (<= 1 |v_main_#t~post6_46|) (<= 0 (+ v_main_~a~0_BEFORE_CALL_79 2147483647 v_main_~b~0_BEFORE_CALL_81)) (<= v_main_~a~0_BEFORE_CALL_79 2147483647) (<= 0 (+ v_main_~a~0_BEFORE_CALL_79 2147483647 |#StackHeapBarrier|)) (<= 0 (+ v_main_~a~0_BEFORE_CALL_79 2147483647 |v_main_#t~post6_46|)) (= |#NULL.offset| 0) (<= v_main_~a~0_BEFORE_CALL_79 (+ |#StackHeapBarrier| 2147483646)) (<= v_main_~b~0_BEFORE_CALL_81 2147483647) (= |#NULL.base| 0)) (and (= |v_main_#t~post6_46| 0) (<= 1 |#StackHeapBarrier|) (= v_main_~a~0_BEFORE_CALL_79 v_main_~x~0_BEFORE_CALL_56) (<= 0 (+ v_main_~a~0_BEFORE_CALL_79 2147483648)) (= |v_old(~counter~0)_BEFORE_CALL_62| 0) (= v_main_~z~0_BEFORE_CALL_61 0) (<= 1 v_main_~b~0_BEFORE_CALL_81) (<= v_main_~a~0_BEFORE_CALL_79 2147483647) (= |#NULL.offset| 0) (= v_main_~y~0_BEFORE_CALL_60 v_main_~b~0_BEFORE_CALL_81) (= ~counter~0 1) (<= v_main_~b~0_BEFORE_CALL_81 2147483647) (= |#NULL.base| 0))))))))' at error location [2023-04-02 23:24:50,002 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:24:50,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:24:50,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-04-02 23:24:50,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112815572] [2023-04-02 23:24:50,003 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 23:24:50,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-02 23:24:50,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:24:50,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-02 23:24:50,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1312, Unknown=8, NotChecked=0, Total=1482 [2023-04-02 23:24:50,005 INFO L87 Difference]: Start difference. First operand 94 states and 99 transitions. Second operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-02 23:25:20,275 WARN L223 SmtUtils]: Spent 22.44s on a formula simplification. DAG size of input: 218 DAG size of output: 133 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 23:25:22,322 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] [2023-04-02 23:25:23,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:25:23,156 INFO L93 Difference]: Finished difference Result 96 states and 100 transitions. [2023-04-02 23:25:23,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-02 23:25:23,156 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 55 [2023-04-02 23:25:23,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:25:23,157 INFO L225 Difference]: With dead ends: 96 [2023-04-02 23:25:23,157 INFO L226 Difference]: Without dead ends: 94 [2023-04-02 23:25:23,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 74.6s TimeCoverageRelationStatistics Valid=189, Invalid=1523, Unknown=10, NotChecked=0, Total=1722 [2023-04-02 23:25:23,158 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 20 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:25:23,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 251 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 343 Invalid, 1 Unknown, 0 Unchecked, 6.2s Time] [2023-04-02 23:25:23,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-04-02 23:25:23,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2023-04-02 23:25:23,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 68 states have internal predecessors, (72), 14 states have call successors, (14), 13 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-02 23:25:23,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2023-04-02 23:25:23,174 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 55 [2023-04-02 23:25:23,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:25:23,174 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2023-04-02 23:25:23,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-02 23:25:23,174 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2023-04-02 23:25:23,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-04-02 23:25:23,175 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:25:23,179 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:25:23,186 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-04-02 23:25:23,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:25:23,385 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:25:23,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:25:23,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1630658595, now seen corresponding path program 4 times [2023-04-02 23:25:23,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:25:23,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663984041] [2023-04-02 23:25:23,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:25:23,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:25:23,393 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:25:23,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1029579042] [2023-04-02 23:25:23,393 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 23:25:23,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:25:23,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:25:23,394 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:25:23,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-02 23:25:24,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:25:24,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 84 conjunts are in the unsatisfiable core [2023-04-02 23:25:24,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:25:56,967 WARN L223 SmtUtils]: Spent 11.43s on a formula simplification. DAG size of input: 168 DAG size of output: 56 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 23:26:11,812 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 6 proven. 84 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-04-02 23:26:11,812 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:26:38,490 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:26:38,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663984041] [2023-04-02 23:26:38,491 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:26:38,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029579042] [2023-04-02 23:26:38,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029579042] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:26:38,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [143422253] [2023-04-02 23:26:38,492 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-02 23:26:38,492 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:26:38,492 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:26:38,492 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:26:38,492 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:26:38,507 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 23:26:38,794 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 80 for LOIs [2023-04-02 23:26:38,873 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 27 for LOIs [2023-04-02 23:26:38,875 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 23:26:38,878 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:26:45,155 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3323#(and (exists ((v_main_~z~0_BEFORE_CALL_77 Int) (v_main_~y~0_BEFORE_CALL_76 Int) (v_main_~x~0_BEFORE_CALL_72 Int) (|v_old(~counter~0)_BEFORE_CALL_72| Int) (v_main_~a~0_BEFORE_CALL_98 Int) (v_main_~b~0_BEFORE_CALL_100 Int)) (and (exists ((|v_main_#t~post6_53| Int)) (and (or (and (= |v_main_#t~post6_53| 0) (<= 1 |#StackHeapBarrier|) (= v_main_~a~0_BEFORE_CALL_98 v_main_~x~0_BEFORE_CALL_72) (<= v_main_~a~0_BEFORE_CALL_98 2147483647) (= v_main_~y~0_BEFORE_CALL_76 v_main_~b~0_BEFORE_CALL_100) (<= 0 (+ v_main_~a~0_BEFORE_CALL_98 2147483648)) (= v_main_~z~0_BEFORE_CALL_77 0) (= |v_old(~counter~0)_BEFORE_CALL_72| 0) (<= v_main_~b~0_BEFORE_CALL_100 2147483647) (= |#NULL.offset| 0) (= ~counter~0 1) (<= 1 v_main_~b~0_BEFORE_CALL_100) (= |#NULL.base| 0)) (and (<= (+ v_main_~a~0_BEFORE_CALL_98 v_main_~b~0_BEFORE_CALL_100) 4294967294) (<= 1 |#StackHeapBarrier|) (<= v_main_~a~0_BEFORE_CALL_98 2147483647) (<= 0 (+ v_main_~a~0_BEFORE_CALL_98 2147483647 |v_main_#t~post6_53|)) (= ~counter~0 (+ |v_main_#t~post6_53| 1)) (<= 1 |v_main_#t~post6_53|) (<= 0 (+ v_main_~a~0_BEFORE_CALL_98 2147483647 v_main_~b~0_BEFORE_CALL_100)) (<= 0 (+ v_main_~a~0_BEFORE_CALL_98 2147483648)) (<= v_main_~b~0_BEFORE_CALL_100 (+ v_main_~a~0_BEFORE_CALL_98 4294967295)) (<= 2 (+ |v_main_#t~post6_53| |#StackHeapBarrier|)) (<= 0 (+ v_main_~a~0_BEFORE_CALL_98 2147483647 |#StackHeapBarrier|)) (= |v_old(~counter~0)_BEFORE_CALL_72| 0) (<= v_main_~b~0_BEFORE_CALL_100 2147483647) (= |#NULL.offset| 0) (<= 2 (+ |#StackHeapBarrier| v_main_~b~0_BEFORE_CALL_100)) (<= v_main_~b~0_BEFORE_CALL_100 (+ |v_main_#t~post6_53| 2147483646)) (<= v_main_~a~0_BEFORE_CALL_98 (+ |#StackHeapBarrier| 2147483646)) (<= v_main_~b~0_BEFORE_CALL_100 (+ |#StackHeapBarrier| 2147483646)) (<= v_main_~a~0_BEFORE_CALL_98 (+ |v_main_#t~post6_53| 2147483646)) (<= 2 (+ |v_main_#t~post6_53| v_main_~b~0_BEFORE_CALL_100)) (<= 1 v_main_~b~0_BEFORE_CALL_100) (<= v_main_~a~0_BEFORE_CALL_98 (+ v_main_~b~0_BEFORE_CALL_100 2147483646)) (= |#NULL.base| 0))) (< |v_main_#t~post6_53| 10))) (not (= (+ v_main_~z~0_BEFORE_CALL_77 (* v_main_~y~0_BEFORE_CALL_76 v_main_~x~0_BEFORE_CALL_72)) (* v_main_~a~0_BEFORE_CALL_98 v_main_~b~0_BEFORE_CALL_100))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 23:26:45,155 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:26:45,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:26:45,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-04-02 23:26:45,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346727648] [2023-04-02 23:26:45,156 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 23:26:45,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-02 23:26:45,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:26:45,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-02 23:26:45,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1451, Unknown=5, NotChecked=0, Total=1640 [2023-04-02 23:26:45,157 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-02 23:26:47,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-04-02 23:26:49,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 23:26:50,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 23:26:52,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 23:26:55,050 WARN L539 Checker$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 23:26:57,097 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 []