/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/array-programs/partial_mod_count_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 20:47:32,758 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 20:47:32,760 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 20:47:32,783 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 20:47:32,783 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 20:47:32,785 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 20:47:32,788 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 20:47:32,790 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 20:47:32,791 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 20:47:32,793 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 20:47:32,794 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 20:47:32,794 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 20:47:32,795 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 20:47:32,795 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 20:47:32,796 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 20:47:32,796 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 20:47:32,797 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 20:47:32,797 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 20:47:32,798 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 20:47:32,799 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 20:47:32,799 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 20:47:32,801 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 20:47:32,801 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 20:47:32,802 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 20:47:32,803 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-31 20:47:32,805 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 20:47:32,806 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 20:47:32,806 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 20:47:32,806 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 20:47:32,807 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 20:47:32,807 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 20:47:32,807 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 20:47:32,807 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 20:47:32,808 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 20:47:32,808 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 20:47:32,808 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 20:47:32,812 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-03-31 20:47:32,831 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 20:47:32,831 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 20:47:32,831 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 20:47:32,831 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 20:47:32,831 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 20:47:32,832 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 20:47:32,832 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 20:47:32,832 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 20:47:32,832 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 20:47:32,832 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 20:47:32,832 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 20:47:32,832 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 20:47:32,832 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 20:47:32,832 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 20:47:32,832 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 20:47:32,834 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 20:47:32,834 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 20:47:32,834 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 20:47:32,835 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 20:47:32,835 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 20:47:32,835 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 20:47:32,835 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 20:47:32,835 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 20:47:32,836 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 20:47:32,836 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 20:47:32,836 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 20:47:32,836 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 20:47:32,836 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 20:47:32,836 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 20:47:32,836 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 20:47:32,836 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 20:47:32,837 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 20:47:32,837 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 20:47:32,837 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 20:47:32,837 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 20:47:32,837 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 20:47:32,837 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 20:47:32,838 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 20:47:32,838 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 20:47:32,838 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 20:47:32,838 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 20:47:32,838 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 20:47:32,993 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 20:47:33,010 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 20:47:33,011 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 20:47:33,012 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 20:47:33,013 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 20:47:33,014 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/partial_mod_count_1.c [2023-03-31 20:47:33,950 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 20:47:34,151 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 20:47:34,151 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_1.c [2023-03-31 20:47:34,161 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0aa103955/d17129df96d84f209f3b87f6d38720d5/FLAG6ea3e5ca5 [2023-03-31 20:47:34,177 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0aa103955/d17129df96d84f209f3b87f6d38720d5 [2023-03-31 20:47:34,179 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 20:47:34,180 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 20:47:34,182 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 20:47:34,182 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 20:47:34,185 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 20:47:34,185 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 08:47:34" (1/1) ... [2023-03-31 20:47:34,187 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@506a81d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:47:34, skipping insertion in model container [2023-03-31 20:47:34,187 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 08:47:34" (1/1) ... [2023-03-31 20:47:34,191 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 20:47:34,205 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 20:47:34,284 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_1.c[323,336] [2023-03-31 20:47:34,294 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 20:47:34,299 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 20:47:34,306 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_1.c[323,336] [2023-03-31 20:47:34,309 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 20:47:34,318 INFO L208 MainTranslator]: Completed translation [2023-03-31 20:47:34,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:47:34 WrapperNode [2023-03-31 20:47:34,318 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 20:47:34,319 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 20:47:34,319 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 20:47:34,319 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 20:47:34,326 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:47:34" (1/1) ... [2023-03-31 20:47:34,326 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:47:34" (1/1) ... [2023-03-31 20:47:34,331 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:47:34" (1/1) ... [2023-03-31 20:47:34,331 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:47:34" (1/1) ... [2023-03-31 20:47:34,336 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:47:34" (1/1) ... [2023-03-31 20:47:34,338 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:47:34" (1/1) ... [2023-03-31 20:47:34,339 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:47:34" (1/1) ... [2023-03-31 20:47:34,339 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:47:34" (1/1) ... [2023-03-31 20:47:34,340 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 20:47:34,341 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 20:47:34,341 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 20:47:34,341 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 20:47:34,341 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:47:34" (1/1) ... [2023-03-31 20:47:34,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 20:47:34,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:47:34,367 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 20:47:34,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 20:47:34,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 20:47:34,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 20:47:34,389 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 20:47:34,389 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 20:47:34,389 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 20:47:34,389 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 20:47:34,389 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 20:47:34,390 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 20:47:34,390 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 20:47:34,390 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 20:47:34,390 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 20:47:34,390 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-31 20:47:34,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 20:47:34,390 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 20:47:34,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 20:47:34,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 20:47:34,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 20:47:34,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 20:47:34,439 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 20:47:34,440 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 20:47:34,569 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 20:47:34,645 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 20:47:34,645 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-03-31 20:47:34,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 08:47:34 BoogieIcfgContainer [2023-03-31 20:47:34,647 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 20:47:34,649 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 20:47:34,649 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 20:47:34,651 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 20:47:34,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 08:47:34" (1/3) ... [2023-03-31 20:47:34,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@206b662d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 08:47:34, skipping insertion in model container [2023-03-31 20:47:34,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:47:34" (2/3) ... [2023-03-31 20:47:34,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@206b662d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 08:47:34, skipping insertion in model container [2023-03-31 20:47:34,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 08:47:34" (3/3) ... [2023-03-31 20:47:34,653 INFO L112 eAbstractionObserver]: Analyzing ICFG partial_mod_count_1.c [2023-03-31 20:47:34,665 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 20:47:34,665 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 20:47:34,703 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 20:47:34,707 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;@262e2dc4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 20:47:34,707 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 20:47:34,710 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 20:47:34,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 20:47:34,715 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:47:34,715 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:47:34,716 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:47:34,720 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:47:34,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1627243692, now seen corresponding path program 1 times [2023-03-31 20:47:34,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:47:34,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392384203] [2023-03-31 20:47:34,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:47:34,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:47:34,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:47:34,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:47:34,974 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:47:34,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392384203] [2023-03-31 20:47:34,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392384203] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 20:47:34,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 20:47:34,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 20:47:34,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245896627] [2023-03-31 20:47:34,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 20:47:34,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 20:47:34,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:47:34,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 20:47:35,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-03-31 20:47:35,001 INFO L87 Difference]: Start difference. First operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:47:35,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:47:35,061 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2023-03-31 20:47:35,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 20:47:35,063 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-03-31 20:47:35,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:47:35,067 INFO L225 Difference]: With dead ends: 34 [2023-03-31 20:47:35,067 INFO L226 Difference]: Without dead ends: 19 [2023-03-31 20:47:35,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-03-31 20:47:35,071 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:47:35,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 19 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:47:35,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-03-31 20:47:35,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2023-03-31 20:47:35,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 20:47:35,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2023-03-31 20:47:35,110 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2023-03-31 20:47:35,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:47:35,111 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2023-03-31 20:47:35,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:47:35,112 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2023-03-31 20:47:35,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-03-31 20:47:35,112 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:47:35,112 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:47:35,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 20:47:35,113 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:47:35,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:47:35,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1579459651, now seen corresponding path program 1 times [2023-03-31 20:47:35,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:47:35,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390673707] [2023-03-31 20:47:35,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:47:35,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:47:35,126 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:47:35,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1778268586] [2023-03-31 20:47:35,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:47:35,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:47:35,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:47:35,129 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:47:35,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 20:47:35,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:47:35,196 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 20:47:35,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:47:35,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:47:35,258 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:47:35,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:47:35,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:47:35,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390673707] [2023-03-31 20:47:35,304 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:47:35,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778268586] [2023-03-31 20:47:35,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778268586] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:47:35,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1234322742] [2023-03-31 20:47:35,321 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-03-31 20:47:35,321 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:47:35,323 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:47:35,326 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:47:35,327 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:47:35,388 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 20 for LOIs [2023-03-31 20:47:35,495 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 36 for LOIs [2023-03-31 20:47:35,520 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 20:47:35,532 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:47:35,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1234322742] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 20:47:35,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-31 20:47:35,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [5, 5] total 17 [2023-03-31 20:47:35,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700116098] [2023-03-31 20:47:35,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 20:47:35,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-31 20:47:35,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:47:35,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-31 20:47:35,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-03-31 20:47:35,765 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 11 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:47:36,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:47:36,269 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2023-03-31 20:47:36,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-03-31 20:47:36,270 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-03-31 20:47:36,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:47:36,270 INFO L225 Difference]: With dead ends: 25 [2023-03-31 20:47:36,270 INFO L226 Difference]: Without dead ends: 23 [2023-03-31 20:47:36,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2023-03-31 20:47:36,272 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 39 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:47:36,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 4 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:47:36,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-03-31 20:47:36,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2023-03-31 20:47:36,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 20:47:36,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2023-03-31 20:47:36,278 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 12 [2023-03-31 20:47:36,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:47:36,278 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2023-03-31 20:47:36,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:47:36,278 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2023-03-31 20:47:36,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-03-31 20:47:36,279 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:47:36,279 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:47:36,287 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-31 20:47:36,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:47:36,484 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:47:36,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:47:36,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1854704851, now seen corresponding path program 1 times [2023-03-31 20:47:36,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:47:36,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557428752] [2023-03-31 20:47:36,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:47:36,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:47:36,496 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:47:36,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [525518117] [2023-03-31 20:47:36,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:47:36,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:47:36,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:47:36,507 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:47:36,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 20:47:36,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:47:36,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 20:47:36,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:47:36,595 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 20:47:36,595 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:47:36,623 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 20:47:36,623 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:47:36,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557428752] [2023-03-31 20:47:36,623 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:47:36,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525518117] [2023-03-31 20:47:36,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525518117] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:47:36,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [578538127] [2023-03-31 20:47:36,625 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-03-31 20:47:36,625 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:47:36,625 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:47:36,625 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:47:36,625 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:47:36,651 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 20 for LOIs [2023-03-31 20:47:36,863 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 16 for LOIs [2023-03-31 20:47:36,886 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 20:47:36,891 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:47:37,123 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '394#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:47:37,124 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:47:37,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 20:47:37,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-03-31 20:47:37,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445571284] [2023-03-31 20:47:37,124 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 20:47:37,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 20:47:37,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:47:37,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 20:47:37,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2023-03-31 20:47:37,125 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 20:47:37,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:47:37,199 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2023-03-31 20:47:37,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 20:47:37,200 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 19 [2023-03-31 20:47:37,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:47:37,201 INFO L225 Difference]: With dead ends: 48 [2023-03-31 20:47:37,201 INFO L226 Difference]: Without dead ends: 33 [2023-03-31 20:47:37,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2023-03-31 20:47:37,204 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 38 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:47:37,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 22 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:47:37,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-03-31 20:47:37,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2023-03-31 20:47:37,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 20:47:37,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2023-03-31 20:47:37,213 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 19 [2023-03-31 20:47:37,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:47:37,213 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2023-03-31 20:47:37,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 20:47:37,214 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2023-03-31 20:47:37,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-03-31 20:47:37,214 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:47:37,214 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:47:37,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 20:47:37,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-03-31 20:47:37,423 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:47:37,423 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:47:37,424 INFO L85 PathProgramCache]: Analyzing trace with hash -981913974, now seen corresponding path program 2 times [2023-03-31 20:47:37,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:47:37,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001930906] [2023-03-31 20:47:37,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:47:37,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:47:37,435 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:47:37,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1214615262] [2023-03-31 20:47:37,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 20:47:37,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:47:37,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:47:37,436 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:47:37,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 20:47:37,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-03-31 20:47:37,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:47:37,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjunts are in the unsatisfiable core [2023-03-31 20:47:37,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:47:37,616 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 20:47:37,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 41 [2023-03-31 20:47:37,657 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-03-31 20:47:37,657 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:47:37,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:47:37,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001930906] [2023-03-31 20:47:37,892 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:47:37,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214615262] [2023-03-31 20:47:37,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214615262] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:47:37,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [330233693] [2023-03-31 20:47:37,895 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-03-31 20:47:37,895 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:47:37,896 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:47:37,896 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:47:37,896 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:47:37,931 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 20 for LOIs [2023-03-31 20:47:38,068 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2023-03-31 20:47:38,080 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 20:47:38,083 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:47:38,378 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '623#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:47:38,379 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:47:38,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-03-31 20:47:38,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-03-31 20:47:38,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224537779] [2023-03-31 20:47:38,379 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-03-31 20:47:38,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-03-31 20:47:38,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:47:38,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-03-31 20:47:38,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2023-03-31 20:47:38,380 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 20:47:38,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:47:38,463 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2023-03-31 20:47:38,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-31 20:47:38,464 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2023-03-31 20:47:38,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:47:38,465 INFO L225 Difference]: With dead ends: 36 [2023-03-31 20:47:38,465 INFO L226 Difference]: Without dead ends: 34 [2023-03-31 20:47:38,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2023-03-31 20:47:38,466 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 17 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:47:38,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 31 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:47:38,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-03-31 20:47:38,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2023-03-31 20:47:38,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 23 states have internal predecessors, (24), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 20:47:38,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2023-03-31 20:47:38,475 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 22 [2023-03-31 20:47:38,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:47:38,475 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2023-03-31 20:47:38,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 20:47:38,475 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2023-03-31 20:47:38,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-03-31 20:47:38,476 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:47:38,476 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:47:38,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 20:47:38,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:47:38,683 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:47:38,683 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:47:38,683 INFO L85 PathProgramCache]: Analyzing trace with hash 308032684, now seen corresponding path program 3 times [2023-03-31 20:47:38,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:47:38,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773078193] [2023-03-31 20:47:38,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:47:38,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:47:38,692 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:47:38,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [279753738] [2023-03-31 20:47:38,692 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 20:47:38,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:47:38,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:47:38,693 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:47:38,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 20:47:38,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 20:47:38,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:47:38,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-31 20:47:38,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:47:38,784 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-03-31 20:47:38,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:47:38,831 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-03-31 20:47:38,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:47:38,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773078193] [2023-03-31 20:47:38,832 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:47:38,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279753738] [2023-03-31 20:47:38,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279753738] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:47:38,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [737677417] [2023-03-31 20:47:38,833 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-03-31 20:47:38,833 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:47:38,833 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:47:38,833 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:47:38,833 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:47:38,846 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 20 for LOIs [2023-03-31 20:47:38,966 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 16 for LOIs [2023-03-31 20:47:38,970 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 20:47:38,974 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:47:39,213 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '931#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:47:39,214 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:47:39,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 20:47:39,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-03-31 20:47:39,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390603250] [2023-03-31 20:47:39,214 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 20:47:39,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-03-31 20:47:39,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:47:39,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-03-31 20:47:39,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2023-03-31 20:47:39,215 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 20:47:39,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:47:39,382 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2023-03-31 20:47:39,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-31 20:47:39,383 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2023-03-31 20:47:39,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:47:39,386 INFO L225 Difference]: With dead ends: 83 [2023-03-31 20:47:39,386 INFO L226 Difference]: Without dead ends: 61 [2023-03-31 20:47:39,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=714, Unknown=0, NotChecked=0, Total=930 [2023-03-31 20:47:39,387 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 75 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:47:39,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 28 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:47:39,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-03-31 20:47:39,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 38. [2023-03-31 20:47:39,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 29 states have internal predecessors, (30), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 20:47:39,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2023-03-31 20:47:39,404 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 29 [2023-03-31 20:47:39,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:47:39,404 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2023-03-31 20:47:39,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 20:47:39,405 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2023-03-31 20:47:39,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-03-31 20:47:39,406 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:47:39,406 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:47:39,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 20:47:39,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:47:39,615 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:47:39,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:47:39,616 INFO L85 PathProgramCache]: Analyzing trace with hash 807107916, now seen corresponding path program 4 times [2023-03-31 20:47:39,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:47:39,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224020825] [2023-03-31 20:47:39,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:47:39,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:47:39,631 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:47:39,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [109201354] [2023-03-31 20:47:39,631 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 20:47:39,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:47:39,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:47:39,633 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:47:39,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 20:47:39,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:47:39,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 13 conjunts are in the unsatisfiable core [2023-03-31 20:47:39,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:47:39,802 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-03-31 20:47:39,802 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:47:39,934 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-03-31 20:47:39,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:47:39,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224020825] [2023-03-31 20:47:39,934 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:47:39,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109201354] [2023-03-31 20:47:39,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109201354] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:47:39,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2057067104] [2023-03-31 20:47:39,935 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-03-31 20:47:39,936 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:47:39,936 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:47:39,936 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:47:39,936 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:47:39,957 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 20 for LOIs [2023-03-31 20:47:40,099 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 16 for LOIs [2023-03-31 20:47:40,103 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 20:47:40,105 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:47:40,348 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1379#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:47:40,348 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:47:40,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 20:47:40,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2023-03-31 20:47:40,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245549104] [2023-03-31 20:47:40,349 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 20:47:40,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-03-31 20:47:40,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:47:40,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-03-31 20:47:40,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=1038, Unknown=0, NotChecked=0, Total=1406 [2023-03-31 20:47:40,350 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 20:47:40,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:47:40,791 INFO L93 Difference]: Finished difference Result 131 states and 163 transitions. [2023-03-31 20:47:40,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-03-31 20:47:40,792 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2023-03-31 20:47:40,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:47:40,793 INFO L225 Difference]: With dead ends: 131 [2023-03-31 20:47:40,793 INFO L226 Difference]: Without dead ends: 109 [2023-03-31 20:47:40,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=654, Invalid=1698, Unknown=0, NotChecked=0, Total=2352 [2023-03-31 20:47:40,794 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 137 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 20:47:40,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 29 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 20:47:40,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-03-31 20:47:40,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 50. [2023-03-31 20:47:40,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 40 states have (on average 1.05) internal successors, (42), 41 states have internal predecessors, (42), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 20:47:40,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2023-03-31 20:47:40,805 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 35 [2023-03-31 20:47:40,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:47:40,806 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2023-03-31 20:47:40,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 20:47:40,806 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2023-03-31 20:47:40,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-03-31 20:47:40,806 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:47:40,806 INFO L195 NwaCegarLoop]: trace histogram [22, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:47:40,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-31 20:47:41,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:47:41,014 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:47:41,014 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:47:41,014 INFO L85 PathProgramCache]: Analyzing trace with hash -165599604, now seen corresponding path program 5 times [2023-03-31 20:47:41,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:47:41,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208131404] [2023-03-31 20:47:41,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:47:41,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:47:41,030 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:47:41,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1664692132] [2023-03-31 20:47:41,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 20:47:41,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:47:41,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:47:41,032 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:47:41,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-31 20:47:41,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-31 20:47:41,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:47:41,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjunts are in the unsatisfiable core [2023-03-31 20:47:41,112 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:47:41,318 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 20:47:41,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 41 [2023-03-31 20:47:41,366 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2023-03-31 20:47:41,366 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:47:41,530 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:47:41,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208131404] [2023-03-31 20:47:41,531 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:47:41,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664692132] [2023-03-31 20:47:41,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664692132] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:47:41,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [494519794] [2023-03-31 20:47:41,532 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-03-31 20:47:41,532 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:47:41,532 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:47:41,532 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:47:41,533 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:47:41,544 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 20 for LOIs [2023-03-31 20:47:41,652 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 16 for LOIs [2023-03-31 20:47:41,656 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 20:47:41,658 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:47:41,894 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1888#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:47:41,894 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:47:41,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-03-31 20:47:41,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-03-31 20:47:41,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900431325] [2023-03-31 20:47:41,894 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-03-31 20:47:41,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-31 20:47:41,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:47:41,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-31 20:47:41,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2023-03-31 20:47:41,895 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 11 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 20:47:42,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:47:42,003 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2023-03-31 20:47:42,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-31 20:47:42,003 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2023-03-31 20:47:42,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:47:42,004 INFO L225 Difference]: With dead ends: 61 [2023-03-31 20:47:42,004 INFO L226 Difference]: Without dead ends: 59 [2023-03-31 20:47:42,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2023-03-31 20:47:42,005 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 19 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:47:42,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 33 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:47:42,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-03-31 20:47:42,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2023-03-31 20:47:42,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 46 states have internal predecessors, (47), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 20:47:42,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2023-03-31 20:47:42,013 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 47 [2023-03-31 20:47:42,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:47:42,014 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2023-03-31 20:47:42,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 20:47:42,014 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2023-03-31 20:47:42,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-03-31 20:47:42,014 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:47:42,014 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:47:42,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-31 20:47:42,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:47:42,225 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:47:42,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:47:42,225 INFO L85 PathProgramCache]: Analyzing trace with hash 454006378, now seen corresponding path program 6 times [2023-03-31 20:47:42,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:47:42,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700993051] [2023-03-31 20:47:42,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:47:42,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:47:42,238 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:47:42,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [880647119] [2023-03-31 20:47:42,238 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 20:47:42,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:47:42,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:47:42,239 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:47:42,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-31 20:47:42,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 20:47:42,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:47:42,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 25 conjunts are in the unsatisfiable core [2023-03-31 20:47:42,335 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:47:42,644 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-03-31 20:47:42,644 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:47:43,105 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 6 proven. 253 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-03-31 20:47:43,106 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:47:43,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700993051] [2023-03-31 20:47:43,106 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:47:43,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880647119] [2023-03-31 20:47:43,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880647119] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:47:43,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [472053422] [2023-03-31 20:47:43,109 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-03-31 20:47:43,109 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:47:43,109 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:47:43,109 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:47:43,109 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:47:43,122 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 20 for LOIs [2023-03-31 20:47:43,236 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 16 for LOIs [2023-03-31 20:47:43,254 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 20:47:43,257 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:47:43,541 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2474#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:47:43,541 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:47:43,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 20:47:43,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2023-03-31 20:47:43,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608855109] [2023-03-31 20:47:43,543 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 20:47:43,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-03-31 20:47:43,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:47:43,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-03-31 20:47:43,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1244, Invalid=2538, Unknown=0, NotChecked=0, Total=3782 [2023-03-31 20:47:43,545 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 50 states, 50 states have (on average 1.2) internal successors, (60), 50 states have internal predecessors, (60), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 20:47:44,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:47:44,605 INFO L93 Difference]: Finished difference Result 238 states and 305 transitions. [2023-03-31 20:47:44,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-03-31 20:47:44,605 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.2) internal successors, (60), 50 states have internal predecessors, (60), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2023-03-31 20:47:44,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:47:44,606 INFO L225 Difference]: With dead ends: 238 [2023-03-31 20:47:44,606 INFO L226 Difference]: Without dead ends: 209 [2023-03-31 20:47:44,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2134 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2394, Invalid=4746, Unknown=0, NotChecked=0, Total=7140 [2023-03-31 20:47:44,609 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 256 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 20:47:44,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 23 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 20:47:44,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2023-03-31 20:47:44,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 81. [2023-03-31 20:47:44,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 70 states have internal predecessors, (71), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 20:47:44,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2023-03-31 20:47:44,629 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 54 [2023-03-31 20:47:44,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:47:44,629 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2023-03-31 20:47:44,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.2) internal successors, (60), 50 states have internal predecessors, (60), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 20:47:44,629 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2023-03-31 20:47:44,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-03-31 20:47:44,630 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:47:44,630 INFO L195 NwaCegarLoop]: trace histogram [46, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:47:44,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-03-31 20:47:44,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:47:44,840 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:47:44,840 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:47:44,840 INFO L85 PathProgramCache]: Analyzing trace with hash 595203050, now seen corresponding path program 7 times [2023-03-31 20:47:44,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:47:44,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165482402] [2023-03-31 20:47:44,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:47:44,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:47:44,889 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:47:44,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [894066485] [2023-03-31 20:47:44,890 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 20:47:44,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:47:44,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:47:44,895 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:47:44,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-03-31 20:47:45,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:47:45,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 49 conjunts are in the unsatisfiable core [2023-03-31 20:47:45,059 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:47:46,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-03-31 20:47:46,040 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:47:47,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 6 proven. 1081 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-03-31 20:47:47,601 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:47:47,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165482402] [2023-03-31 20:47:47,602 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:47:47,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894066485] [2023-03-31 20:47:47,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894066485] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:47:47,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [467649804] [2023-03-31 20:47:47,604 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-03-31 20:47:47,604 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:47:47,604 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:47:47,604 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:47:47,604 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:47:47,645 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 20 for LOIs [2023-03-31 20:47:47,746 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2023-03-31 20:47:47,757 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 20:47:47,759 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:47:48,195 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3637#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:47:48,196 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:47:48,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 20:47:48,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2023-03-31 20:47:48,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938598701] [2023-03-31 20:47:48,196 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 20:47:48,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2023-03-31 20:47:48,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:47:48,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2023-03-31 20:47:48,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4724, Invalid=7266, Unknown=0, NotChecked=0, Total=11990 [2023-03-31 20:47:48,200 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 98 states, 98 states have (on average 1.1020408163265305) internal successors, (108), 98 states have internal predecessors, (108), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 20:47:52,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:47:52,110 INFO L93 Difference]: Finished difference Result 430 states and 569 transitions. [2023-03-31 20:47:52,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-03-31 20:47:52,110 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.1020408163265305) internal successors, (108), 98 states have internal predecessors, (108), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 78 [2023-03-31 20:47:52,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:47:52,112 INFO L225 Difference]: With dead ends: 430 [2023-03-31 20:47:52,112 INFO L226 Difference]: Without dead ends: 401 [2023-03-31 20:47:52,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6598 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=9330, Invalid=15162, Unknown=0, NotChecked=0, Total=24492 [2023-03-31 20:47:52,116 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 648 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 939 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 695 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 1340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 939 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-03-31 20:47:52,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [695 Valid, 41 Invalid, 1340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [939 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-03-31 20:47:52,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2023-03-31 20:47:52,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 129. [2023-03-31 20:47:52,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 117 states have (on average 1.017094017094017) internal successors, (119), 118 states have internal predecessors, (119), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 20:47:52,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2023-03-31 20:47:52,148 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 78 [2023-03-31 20:47:52,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:47:52,148 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2023-03-31 20:47:52,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.1020408163265305) internal successors, (108), 98 states have internal predecessors, (108), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 20:47:52,148 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2023-03-31 20:47:52,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-03-31 20:47:52,149 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:47:52,149 INFO L195 NwaCegarLoop]: trace histogram [94, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:47:52,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-03-31 20:47:52,357 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,SelfDestructingSolverStorable8 [2023-03-31 20:47:52,357 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:47:52,357 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:47:52,357 INFO L85 PathProgramCache]: Analyzing trace with hash 2098040554, now seen corresponding path program 8 times [2023-03-31 20:47:52,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:47:52,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320498301] [2023-03-31 20:47:52,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:47:52,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:47:52,399 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:47:52,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1685878551] [2023-03-31 20:47:52,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 20:47:52,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:47:52,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:47:52,401 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:47:52,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-03-31 20:47:52,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-03-31 20:47:52,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:47:52,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 18 conjunts are in the unsatisfiable core [2023-03-31 20:47:52,604 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:47:52,997 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 20:47:52,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 41 [2023-03-31 20:47:53,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4498 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 4471 trivial. 0 not checked. [2023-03-31 20:47:53,035 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:47:53,242 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:47:53,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320498301] [2023-03-31 20:47:53,242 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:47:53,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685878551] [2023-03-31 20:47:53,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685878551] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:47:53,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2087816826] [2023-03-31 20:47:53,243 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-03-31 20:47:53,243 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:47:53,243 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:47:53,243 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:47:53,243 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:47:53,255 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 20 for LOIs [2023-03-31 20:47:53,352 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 16 for LOIs [2023-03-31 20:47:53,356 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 20:47:53,358 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:47:53,604 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5130#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:47:53,604 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:47:53,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-03-31 20:47:53,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-03-31 20:47:53,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056551511] [2023-03-31 20:47:53,605 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-03-31 20:47:53,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-31 20:47:53,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:47:53,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-31 20:47:53,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2023-03-31 20:47:53,606 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 20:47:53,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:47:53,727 INFO L93 Difference]: Finished difference Result 140 states and 141 transitions. [2023-03-31 20:47:53,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-03-31 20:47:53,727 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 126 [2023-03-31 20:47:53,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:47:53,728 INFO L225 Difference]: With dead ends: 140 [2023-03-31 20:47:53,728 INFO L226 Difference]: Without dead ends: 138 [2023-03-31 20:47:53,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2023-03-31 20:47:53,729 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 17 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:47:53,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 42 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:47:53,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-03-31 20:47:53,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2023-03-31 20:47:53,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 122 states have (on average 1.0163934426229508) internal successors, (124), 123 states have internal predecessors, (124), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 20:47:53,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2023-03-31 20:47:53,757 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 126 [2023-03-31 20:47:53,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:47:53,757 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2023-03-31 20:47:53,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 20:47:53,764 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2023-03-31 20:47:53,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-03-31 20:47:53,770 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:47:53,770 INFO L195 NwaCegarLoop]: trace histogram [94, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:47:53,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-03-31 20:47:53,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-03-31 20:47:53,976 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:47:53,976 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:47:53,977 INFO L85 PathProgramCache]: Analyzing trace with hash -779311028, now seen corresponding path program 9 times [2023-03-31 20:47:53,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:47:53,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398951821] [2023-03-31 20:47:53,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:47:53,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:47:54,025 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:47:54,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [60562477] [2023-03-31 20:47:54,025 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 20:47:54,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:47:54,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:47:54,026 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) [2023-03-31 20:47:54,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-03-31 20:47:54,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 20:47:54,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:47:54,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 1072 conjuncts, 97 conjunts are in the unsatisfiable core [2023-03-31 20:47:54,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:47:57,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4523 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-03-31 20:47:57,570 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:48:03,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4523 backedges. 8 proven. 4465 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-03-31 20:48:03,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:48:03,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398951821] [2023-03-31 20:48:03,559 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:48:03,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60562477] [2023-03-31 20:48:03,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60562477] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:48:03,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [572969977] [2023-03-31 20:48:03,560 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-03-31 20:48:03,560 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:48:03,560 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:48:03,560 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:48:03,560 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:48:03,578 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 20 for LOIs [2023-03-31 20:48:03,670 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 16 for LOIs [2023-03-31 20:48:03,674 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 20:48:03,676 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:48:04,261 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6642#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:48:04,262 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:48:04,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 20:48:04,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 194 [2023-03-31 20:48:04,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134567519] [2023-03-31 20:48:04,262 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 20:48:04,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2023-03-31 20:48:04,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:48:04,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2023-03-31 20:48:04,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18596, Invalid=23634, Unknown=0, NotChecked=0, Total=42230 [2023-03-31 20:48:04,268 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand has 194 states, 194 states have (on average 1.0515463917525774) internal successors, (204), 194 states have internal predecessors, (204), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 20:48:26,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:48:26,004 INFO L93 Difference]: Finished difference Result 825 states and 1107 transitions. [2023-03-31 20:48:26,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2023-03-31 20:48:26,005 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 1.0515463917525774) internal successors, (204), 194 states have internal predecessors, (204), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 133 [2023-03-31 20:48:26,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:48:26,008 INFO L225 Difference]: With dead ends: 825 [2023-03-31 20:48:26,008 INFO L226 Difference]: Without dead ends: 789 [2023-03-31 20:48:26,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22438 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=37026, Invalid=53274, Unknown=0, NotChecked=0, Total=90300 [2023-03-31 20:48:26,013 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 1586 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 2164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1681 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 2957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2164 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-03-31 20:48:26,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1681 Valid, 52 Invalid, 2957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2164 Valid, 793 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-03-31 20:48:26,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2023-03-31 20:48:26,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 232. [2023-03-31 20:48:26,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 218 states have (on average 1.0091743119266054) internal successors, (220), 219 states have internal predecessors, (220), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 20:48:26,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 233 transitions. [2023-03-31 20:48:26,086 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 233 transitions. Word has length 133 [2023-03-31 20:48:26,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:48:26,087 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 233 transitions. [2023-03-31 20:48:26,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 1.0515463917525774) internal successors, (204), 194 states have internal predecessors, (204), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 20:48:26,087 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 233 transitions. [2023-03-31 20:48:26,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2023-03-31 20:48:26,088 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:48:26,088 INFO L195 NwaCegarLoop]: trace histogram [190, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:48:26,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-03-31 20:48:26,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-03-31 20:48:26,297 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:48:26,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:48:26,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1366625716, now seen corresponding path program 10 times [2023-03-31 20:48:26,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:48:26,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901884999] [2023-03-31 20:48:26,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:48:26,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:48:26,394 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:48:26,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1976628109] [2023-03-31 20:48:26,394 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 20:48:26,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:48:26,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:48:26,395 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:48:26,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-03-31 20:48:26,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:48:26,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 2032 conjuncts, 193 conjunts are in the unsatisfiable core [2023-03-31 20:48:26,975 INFO L285 TraceCheckSpWp]: Computing forward predicates...