/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 23:27:39,725 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 23:27:39,727 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 23:27:39,757 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 23:27:39,758 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 23:27:39,760 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 23:27:39,762 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 23:27:39,765 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 23:27:39,767 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 23:27:39,770 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 23:27:39,771 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 23:27:39,773 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 23:27:39,773 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 23:27:39,775 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 23:27:39,776 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 23:27:39,776 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 23:27:39,777 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 23:27:39,777 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 23:27:39,779 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 23:27:39,782 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 23:27:39,783 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 23:27:39,784 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 23:27:39,785 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 23:27:39,786 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 23:27:39,792 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-31 23:27:39,795 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 23:27:39,795 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 23:27:39,796 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 23:27:39,797 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 23:27:39,797 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 23:27:39,797 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 23:27:39,798 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 23:27:39,798 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 23:27:39,798 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 23:27:39,798 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 23:27:39,799 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 23:27:39,800 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-03-31 23:27:39,824 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 23:27:39,825 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 23:27:39,825 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 23:27:39,825 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 23:27:39,826 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 23:27:39,826 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 23:27:39,826 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 23:27:39,826 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 23:27:39,826 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 23:27:39,826 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 23:27:39,827 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 23:27:39,827 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 23:27:39,827 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 23:27:39,827 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 23:27:39,827 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 23:27:39,828 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 23:27:39,828 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 23:27:39,828 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 23:27:39,829 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 23:27:39,829 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 23:27:39,829 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 23:27:39,829 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 23:27:39,829 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 23:27:39,829 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 23:27:39,829 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 23:27:39,830 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 23:27:39,830 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 23:27:39,830 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 23:27:39,830 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 23:27:39,830 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 23:27:39,830 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 23:27:39,830 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 23:27:39,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:27:39,831 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 23:27:39,831 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 23:27:39,831 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 23:27:39,831 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 23:27:39,831 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 23:27:39,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 23:27:39,831 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 23:27:39,831 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 23:27:39,831 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 23:27:40,043 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 23:27:40,064 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 23:27:40,066 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 23:27:40,067 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 23:27:40,076 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 23:27:40,077 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound100.c [2023-03-31 23:27:41,278 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 23:27:41,378 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 23:27:41,379 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound100.c [2023-03-31 23:27:41,383 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5eefb57d/473003701f9e4c7a9b75cb42b6101638/FLAGc79e4f767 [2023-03-31 23:27:41,395 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5eefb57d/473003701f9e4c7a9b75cb42b6101638 [2023-03-31 23:27:41,397 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 23:27:41,398 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 23:27:41,400 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 23:27:41,400 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 23:27:41,402 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 23:27:41,403 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:27:41" (1/1) ... [2023-03-31 23:27:41,404 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51d20dca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:27:41, skipping insertion in model container [2023-03-31 23:27:41,404 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:27:41" (1/1) ... [2023-03-31 23:27:41,408 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 23:27:41,418 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 23:27:41,512 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound100.c[458,471] [2023-03-31 23:27:41,526 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:27:41,533 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 23:27:41,541 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound100.c[458,471] [2023-03-31 23:27:41,552 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:27:41,561 INFO L208 MainTranslator]: Completed translation [2023-03-31 23:27:41,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:27:41 WrapperNode [2023-03-31 23:27:41,561 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 23:27:41,562 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 23:27:41,562 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 23:27:41,562 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 23:27:41,569 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:27:41" (1/1) ... [2023-03-31 23:27:41,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:27:41" (1/1) ... [2023-03-31 23:27:41,573 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:27:41" (1/1) ... [2023-03-31 23:27:41,574 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:27:41" (1/1) ... [2023-03-31 23:27:41,581 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:27:41" (1/1) ... [2023-03-31 23:27:41,583 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:27:41" (1/1) ... [2023-03-31 23:27:41,585 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:27:41" (1/1) ... [2023-03-31 23:27:41,585 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:27:41" (1/1) ... [2023-03-31 23:27:41,589 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 23:27:41,589 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 23:27:41,590 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 23:27:41,590 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 23:27:41,591 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:27:41" (1/1) ... [2023-03-31 23:27:41,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:27:41,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:27:41,612 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 23:27:41,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 23:27:41,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 23:27:41,660 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 23:27:41,660 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 23:27:41,660 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-31 23:27:41,660 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 23:27:41,660 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 23:27:41,660 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 23:27:41,660 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 23:27:41,660 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 23:27:41,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 23:27:41,660 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2023-03-31 23:27:41,660 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-31 23:27:41,661 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 23:27:41,661 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 23:27:41,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 23:27:41,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 23:27:41,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 23:27:41,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 23:27:41,661 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 23:27:41,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 23:27:41,711 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 23:27:41,712 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 23:27:41,815 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 23:27:41,831 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 23:27:41,831 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 23:27:41,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:27:41 BoogieIcfgContainer [2023-03-31 23:27:41,833 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 23:27:41,834 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 23:27:41,834 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 23:27:41,836 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 23:27:41,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 11:27:41" (1/3) ... [2023-03-31 23:27:41,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@437415e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:27:41, skipping insertion in model container [2023-03-31 23:27:41,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:27:41" (2/3) ... [2023-03-31 23:27:41,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@437415e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:27:41, skipping insertion in model container [2023-03-31 23:27:41,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:27:41" (3/3) ... [2023-03-31 23:27:41,838 INFO L112 eAbstractionObserver]: Analyzing ICFG ps4-ll_valuebound100.c [2023-03-31 23:27:41,848 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 23:27:41,848 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 23:27:41,875 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 23:27:41,879 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;@7d713a8b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 23:27:41,880 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 23:27:41,893 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 23:27:41,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-03-31 23:27:41,898 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:27:41,898 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:27:41,898 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:27:41,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:27:41,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1070716929, now seen corresponding path program 1 times [2023-03-31 23:27:41,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:27:41,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506352176] [2023-03-31 23:27:41,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:27:41,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:27:41,986 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:27:41,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [26164986] [2023-03-31 23:27:41,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:27:41,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:27:41,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:27:41,989 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:27:42,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 23:27:42,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:27:42,051 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2023-03-31 23:27:42,055 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:27:42,121 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 23:27:42,122 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:27:42,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:27:42,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506352176] [2023-03-31 23:27:42,122 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:27:42,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26164986] [2023-03-31 23:27:42,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26164986] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:27:42,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:27:42,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 23:27:42,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380342414] [2023-03-31 23:27:42,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:27:42,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 23:27:42,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:27:42,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 23:27:42,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 23:27:42,144 INFO L87 Difference]: Start difference. First operand has 24 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 23:27:42,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:27:42,237 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2023-03-31 23:27:42,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 23:27:42,240 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2023-03-31 23:27:42,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:27:42,246 INFO L225 Difference]: With dead ends: 50 [2023-03-31 23:27:42,246 INFO L226 Difference]: Without dead ends: 27 [2023-03-31 23:27:42,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-31 23:27:42,253 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 7 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 23:27:42,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 60 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 23:27:42,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-03-31 23:27:42,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-03-31 23:27:42,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 23:27:42,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2023-03-31 23:27:42,288 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 14 [2023-03-31 23:27:42,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:27:42,288 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2023-03-31 23:27:42,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 23:27:42,289 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2023-03-31 23:27:42,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-03-31 23:27:42,290 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:27:42,290 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:27:42,304 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 23:27:42,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-03-31 23:27:42,495 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:27:42,496 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:27:42,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1540599750, now seen corresponding path program 1 times [2023-03-31 23:27:42,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:27:42,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450740468] [2023-03-31 23:27:42,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:27:42,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:27:42,522 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:27:42,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [304080776] [2023-03-31 23:27:42,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:27:42,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:27:42,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:27:42,533 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:27:42,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 23:27:42,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:27:42,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 19 conjunts are in the unsatisfiable core [2023-03-31 23:27:42,596 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:27:42,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:27:42,673 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:27:42,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:27:42,774 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:27:42,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450740468] [2023-03-31 23:27:42,774 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:27:42,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304080776] [2023-03-31 23:27:42,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304080776] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:27:42,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1613537777] [2023-03-31 23:27:42,787 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-03-31 23:27:42,787 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:27:42,789 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:27:42,792 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:27:42,793 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:27:42,835 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:27:43,037 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2023-03-31 23:27:43,124 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 29 for LOIs [2023-03-31 23:27:43,132 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:27:43,136 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:27:45,775 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '319#(and (exists ((v_main_~x~0_BEFORE_CALL_11 Int) (v_main_~y~0_BEFORE_CALL_11 Int) (v_main_~c~0_BEFORE_CALL_7 Int) (v_main_~k~0_BEFORE_CALL_9 Int)) (and (not (= (+ (* 2 (* v_main_~y~0_BEFORE_CALL_11 v_main_~y~0_BEFORE_CALL_11 v_main_~y~0_BEFORE_CALL_11)) (* v_main_~y~0_BEFORE_CALL_11 v_main_~y~0_BEFORE_CALL_11) (* v_main_~y~0_BEFORE_CALL_11 v_main_~y~0_BEFORE_CALL_11 v_main_~y~0_BEFORE_CALL_11 v_main_~y~0_BEFORE_CALL_11)) (* v_main_~x~0_BEFORE_CALL_11 4))) (or (and (<= 0 v_main_~k~0_BEFORE_CALL_9) (= v_main_~y~0_BEFORE_CALL_11 0) (= v_main_~x~0_BEFORE_CALL_11 0) (= v_main_~c~0_BEFORE_CALL_7 0) (= |#NULL.offset| 0) (<= v_main_~k~0_BEFORE_CALL_9 100) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0)) (and (<= 0 v_main_~k~0_BEFORE_CALL_9) (<= 1 v_main_~y~0_BEFORE_CALL_11) (<= 1 v_main_~x~0_BEFORE_CALL_11) (= |#NULL.offset| 0) (<= 1 v_main_~c~0_BEFORE_CALL_7) (<= v_main_~c~0_BEFORE_CALL_7 101) (<= v_main_~k~0_BEFORE_CALL_9 100) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 23:27:45,775 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:27:45,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:27:45,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2023-03-31 23:27:45,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470025960] [2023-03-31 23:27:45,775 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:27:45,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-31 23:27:45,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:27:45,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-31 23:27:45,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=466, Unknown=1, NotChecked=0, Total=552 [2023-03-31 23:27:45,777 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 23:27:45,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:27:45,883 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2023-03-31 23:27:45,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 23:27:45,883 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 21 [2023-03-31 23:27:45,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:27:45,884 INFO L225 Difference]: With dead ends: 38 [2023-03-31 23:27:45,884 INFO L226 Difference]: Without dead ends: 32 [2023-03-31 23:27:45,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=102, Invalid=547, Unknown=1, NotChecked=0, Total=650 [2023-03-31 23:27:45,885 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 14 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:27:45,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 107 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:27:45,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-03-31 23:27:45,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2023-03-31 23:27:45,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 23:27:45,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2023-03-31 23:27:45,891 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 21 [2023-03-31 23:27:45,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:27:45,891 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2023-03-31 23:27:45,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 23:27:45,891 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2023-03-31 23:27:45,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-03-31 23:27:45,892 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:27:45,892 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:27:45,909 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-03-31 23:27:46,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-03-31 23:27:46,097 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:27:46,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:27:46,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1414863620, now seen corresponding path program 1 times [2023-03-31 23:27:46,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:27:46,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208677997] [2023-03-31 23:27:46,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:27:46,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:27:46,106 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:27:46,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1797067300] [2023-03-31 23:27:46,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:27:46,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:27:46,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:27:46,108 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:27:46,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 23:27:46,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:27:46,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 20 conjunts are in the unsatisfiable core [2023-03-31 23:27:46,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:27:46,220 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 23:27:46,220 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:28:15,506 WARN L861 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((v_main_~y~0_BEFORE_CALL_15 Int) (v_main_~k~0_BEFORE_CALL_13 Int)) (or (= (* v_main_~y~0_BEFORE_CALL_15 v_main_~y~0_BEFORE_CALL_15) (* v_main_~y~0_BEFORE_CALL_15 v_main_~k~0_BEFORE_CALL_13)) (= (mod (+ (* 2 v_main_~y~0_BEFORE_CALL_15 v_main_~y~0_BEFORE_CALL_15 v_main_~y~0_BEFORE_CALL_15) (* v_main_~y~0_BEFORE_CALL_15 v_main_~y~0_BEFORE_CALL_15 3) (* v_main_~y~0_BEFORE_CALL_15 v_main_~y~0_BEFORE_CALL_15 v_main_~y~0_BEFORE_CALL_15 v_main_~y~0_BEFORE_CALL_15 3)) 4) 0)))) is different from true [2023-03-31 23:28:33,559 WARN L861 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((v_main_~y~0_BEFORE_CALL_15 Int) (v_main_~k~0_BEFORE_CALL_13 Int)) (or (= (* v_main_~y~0_BEFORE_CALL_15 v_main_~y~0_BEFORE_CALL_15) (* v_main_~y~0_BEFORE_CALL_15 v_main_~k~0_BEFORE_CALL_13)) (= (mod (+ (* 2 v_main_~y~0_BEFORE_CALL_15 v_main_~y~0_BEFORE_CALL_15 v_main_~y~0_BEFORE_CALL_15) (* v_main_~y~0_BEFORE_CALL_15 v_main_~y~0_BEFORE_CALL_15 3) (* v_main_~y~0_BEFORE_CALL_15 v_main_~y~0_BEFORE_CALL_15 v_main_~y~0_BEFORE_CALL_15 v_main_~y~0_BEFORE_CALL_15 3)) 4) 0))) (= c___VERIFIER_assert_~cond 0)) is different from true [2023-03-31 23:28:39,601 WARN L839 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 3 c_main_~y~0 c_main_~y~0) (* 2 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 3 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 4) 0)) (forall ((main_~k~0 Int)) (or (< (+ c_main_~c~0 1) main_~k~0) (<= main_~k~0 c_main_~c~0) (= (+ (* main_~k~0 c_main_~y~0) main_~k~0) (+ (* 2 c_main_~y~0) (* c_main_~y~0 c_main_~y~0) 1))))) is different from false [2023-03-31 23:28:41,624 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:28:41,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208677997] [2023-03-31 23:28:41,624 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:28:41,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797067300] [2023-03-31 23:28:41,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797067300] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:28:41,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1627654879] [2023-03-31 23:28:41,626 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-03-31 23:28:41,626 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:28:41,626 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:28:41,626 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:28:41,626 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:28:41,638 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:28:41,755 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-03-31 23:28:41,757 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 29 for LOIs [2023-03-31 23:28:41,761 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:28:41,764 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:28:42,018 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '568#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 23:28:42,018 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:28:42,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-03-31 23:28:42,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-03-31 23:28:42,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686319049] [2023-03-31 23:28:42,019 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-03-31 23:28:42,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-03-31 23:28:42,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:28:42,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-03-31 23:28:42,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=520, Unknown=4, NotChecked=144, Total=756 [2023-03-31 23:28:42,020 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-03-31 23:28:42,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:28:42,094 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2023-03-31 23:28:42,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 23:28:42,095 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 27 [2023-03-31 23:28:42,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:28:42,095 INFO L225 Difference]: With dead ends: 36 [2023-03-31 23:28:42,095 INFO L226 Difference]: Without dead ends: 31 [2023-03-31 23:28:42,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=103, Invalid=607, Unknown=4, NotChecked=156, Total=870 [2023-03-31 23:28:42,097 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 7 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 23:28:42,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 72 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 23:28:42,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-03-31 23:28:42,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-03-31 23:28:42,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 23:28:42,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2023-03-31 23:28:42,101 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 27 [2023-03-31 23:28:42,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:28:42,102 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2023-03-31 23:28:42,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-03-31 23:28:42,102 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2023-03-31 23:28:42,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-03-31 23:28:42,102 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:28:42,103 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:28:42,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 23:28:42,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:28:42,308 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:28:42,308 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:28:42,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1826650261, now seen corresponding path program 2 times [2023-03-31 23:28:42,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:28:42,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800217850] [2023-03-31 23:28:42,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:28:42,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:28:42,317 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:28:42,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1236974964] [2023-03-31 23:28:42,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 23:28:42,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:28:42,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:28:42,330 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:28:42,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 23:28:42,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-31 23:28:42,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 23:28:42,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 25 conjunts are in the unsatisfiable core [2023-03-31 23:28:42,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:28:42,477 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 23:28:42,477 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:28:46,594 WARN L839 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* 3 c_main_~y~0 c_main_~y~0) (* 2 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 3 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 4) 0)) (= (+ (* c_main_~y~0 c_main_~k~0) c_main_~k~0) (+ (* 2 c_main_~y~0) (* c_main_~y~0 c_main_~y~0) 1)) (<= c_main_~k~0 c_main_~c~0) (< (+ c_main_~c~0 1) c_main_~k~0)) is different from false