/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 EqDomain -i ../sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 11:09:33,746 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 11:09:33,747 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 11:09:33,763 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 11:09:33,764 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 11:09:33,764 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 11:09:33,765 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 11:09:33,766 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 11:09:33,767 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 11:09:33,768 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 11:09:33,768 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 11:09:33,769 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 11:09:33,769 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 11:09:33,770 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 11:09:33,770 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 11:09:33,771 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 11:09:33,771 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 11:09:33,772 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 11:09:33,773 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 11:09:33,774 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 11:09:33,775 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 11:09:33,775 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 11:09:33,776 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 11:09:33,776 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 11:09:33,778 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 11:09:33,779 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 11:09:33,779 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 11:09:33,779 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 11:09:33,779 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 11:09:33,780 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 11:09:33,780 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 11:09:33,781 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 11:09:33,781 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 11:09:33,781 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 11:09:33,782 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 11:09:33,782 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 11:09:33,782 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 11:09:33,783 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 11:09:33,783 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 11:09:33,783 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 11:09:33,784 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 11:09:33,788 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 11:09:33,801 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 11:09:33,801 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 11:09:33,801 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 11:09:33,801 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 11:09:33,802 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 11:09:33,802 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 11:09:33,802 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 11:09:33,802 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 11:09:33,802 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 11:09:33,802 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 11:09:33,802 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 11:09:33,802 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 11:09:33,802 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 11:09:33,802 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 11:09:33,803 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 11:09:33,803 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 11:09:33,803 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 11:09:33,803 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 11:09:33,803 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 11:09:33,803 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 11:09:33,803 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 11:09:33,804 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 11:09:33,804 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 11:09:33,804 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 11:09:33,804 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 11:09:33,804 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 11:09:33,804 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 11:09:33,804 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 11:09:33,804 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 11:09:33,804 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 11:09:33,804 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 11:09:33,804 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 11:09:33,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:09:33,805 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 11:09:33,805 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 11:09:33,805 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 11:09:33,805 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 11:09:33,805 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 11:09:33,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 11:09:33,805 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 11:09:33,805 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 11:09:33,805 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 11:09:33,966 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 11:09:33,989 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 11:09:33,990 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 11:09:33,991 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 11:09:33,991 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 11:09:33,991 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c [2023-04-01 11:09:34,908 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 11:09:35,097 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 11:09:35,098 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c [2023-04-01 11:09:35,101 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f812129d7/acd4bc9ddc384d338bd5b34d6ad8bc55/FLAGbbccd921c [2023-04-01 11:09:35,115 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f812129d7/acd4bc9ddc384d338bd5b34d6ad8bc55 [2023-04-01 11:09:35,117 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 11:09:35,118 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 11:09:35,119 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 11:09:35,119 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 11:09:35,121 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 11:09:35,122 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:09:35" (1/1) ... [2023-04-01 11:09:35,123 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ba9f797 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:09:35, skipping insertion in model container [2023-04-01 11:09:35,123 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:09:35" (1/1) ... [2023-04-01 11:09:35,128 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 11:09:35,140 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 11:09:35,224 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/loops-crafted-1/mono-crafted_6.c[318,331] [2023-04-01 11:09:35,231 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:09:35,237 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 11:09:35,245 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/loops-crafted-1/mono-crafted_6.c[318,331] [2023-04-01 11:09:35,246 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:09:35,255 INFO L208 MainTranslator]: Completed translation [2023-04-01 11:09:35,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:09:35 WrapperNode [2023-04-01 11:09:35,255 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 11:09:35,256 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 11:09:35,256 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 11:09:35,256 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 11:09:35,263 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:09:35" (1/1) ... [2023-04-01 11:09:35,263 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:09:35" (1/1) ... [2023-04-01 11:09:35,267 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:09:35" (1/1) ... [2023-04-01 11:09:35,267 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:09:35" (1/1) ... [2023-04-01 11:09:35,270 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:09:35" (1/1) ... [2023-04-01 11:09:35,271 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:09:35" (1/1) ... [2023-04-01 11:09:35,272 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:09:35" (1/1) ... [2023-04-01 11:09:35,273 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:09:35" (1/1) ... [2023-04-01 11:09:35,273 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 11:09:35,274 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 11:09:35,274 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 11:09:35,274 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 11:09:35,275 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:09:35" (1/1) ... [2023-04-01 11:09:35,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:09:35,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:09:35,296 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 11:09:35,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 11:09:35,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 11:09:35,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 11:09:35,333 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 11:09:35,333 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 11:09:35,333 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 11:09:35,333 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 11:09:35,335 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 11:09:35,336 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 11:09:35,336 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 11:09:35,336 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 11:09:35,336 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 11:09:35,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 11:09:35,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 11:09:35,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 11:09:35,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 11:09:35,336 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 11:09:35,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 11:09:35,385 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 11:09:35,387 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 11:09:35,464 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 11:09:35,517 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 11:09:35,517 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 11:09:35,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:09:35 BoogieIcfgContainer [2023-04-01 11:09:35,519 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 11:09:35,520 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 11:09:35,520 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 11:09:35,528 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 11:09:35,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:09:35" (1/3) ... [2023-04-01 11:09:35,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@963868a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:09:35, skipping insertion in model container [2023-04-01 11:09:35,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:09:35" (2/3) ... [2023-04-01 11:09:35,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@963868a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:09:35, skipping insertion in model container [2023-04-01 11:09:35,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:09:35" (3/3) ... [2023-04-01 11:09:35,530 INFO L112 eAbstractionObserver]: Analyzing ICFG mono-crafted_6.c [2023-04-01 11:09:35,541 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 11:09:35,542 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 11:09:35,571 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 11:09:35,575 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;@2d4de001, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 11:09:35,575 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 11:09:35,583 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 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) [2023-04-01 11:09:35,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-04-01 11:09:35,588 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:09:35,588 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:09:35,588 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:09:35,591 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:09:35,591 INFO L85 PathProgramCache]: Analyzing trace with hash -222080269, now seen corresponding path program 1 times [2023-04-01 11:09:35,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:09:35,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779964522] [2023-04-01 11:09:35,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:09:35,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:09:35,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:09:35,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:09:35,719 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:09:35,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779964522] [2023-04-01 11:09:35,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779964522] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:09:35,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:09:35,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 11:09:35,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640678871] [2023-04-01 11:09:35,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:09:35,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 11:09:35,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:09:35,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 11:09:35,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 11:09:35,765 INFO L87 Difference]: Start difference. First operand has 17 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 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 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:09:35,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:09:35,804 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2023-04-01 11:09:35,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 11:09:35,806 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-04-01 11:09:35,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:09:35,810 INFO L225 Difference]: With dead ends: 29 [2023-04-01 11:09:35,810 INFO L226 Difference]: Without dead ends: 12 [2023-04-01 11:09:35,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 11:09:35,814 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:09:35,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:09:35,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-04-01 11:09:35,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-04-01 11:09:35,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 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) [2023-04-01 11:09:35,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2023-04-01 11:09:35,853 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2023-04-01 11:09:35,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:09:35,853 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2023-04-01 11:09:35,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:09:35,853 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2023-04-01 11:09:35,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 11:09:35,865 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:09:35,865 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:09:35,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 11:09:35,866 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:09:35,866 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:09:35,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1686496273, now seen corresponding path program 1 times [2023-04-01 11:09:35,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:09:35,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714903933] [2023-04-01 11:09:35,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:09:35,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:09:35,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:09:35,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:09:35,995 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:09:35,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714903933] [2023-04-01 11:09:35,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714903933] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:09:35,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136806049] [2023-04-01 11:09:35,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:09:35,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:09:35,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:09:36,014 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:09:36,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 11:09:36,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:09:36,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 11:09:36,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:09:36,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:09:36,089 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:09:36,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:09:36,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136806049] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:09:36,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1805589148] [2023-04-01 11:09:36,230 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-04-01 11:09:36,231 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:09:36,233 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:09:36,236 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:09:36,236 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:09:36,351 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:09:36,573 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 56 for LOIs [2023-04-01 11:09:36,605 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:09:36,611 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:09:37,062 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '152#(and (= (select |#length| 3) 12) (= 2 (select |#length| 1)) (= 17 (select |#length| 2)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:09:37,064 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:09:37,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:09:37,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-01 11:09:37,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309499612] [2023-04-01 11:09:37,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 11:09:37,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 11:09:37,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:09:37,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 11:09:37,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2023-04-01 11:09:37,071 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:09:37,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:09:37,087 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2023-04-01 11:09:37,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 11:09:37,088 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 11:09:37,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:09:37,088 INFO L225 Difference]: With dead ends: 20 [2023-04-01 11:09:37,088 INFO L226 Difference]: Without dead ends: 15 [2023-04-01 11:09:37,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2023-04-01 11:09:37,091 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:09:37,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:09:37,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-04-01 11:09:37,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-04-01 11:09:37,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 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) [2023-04-01 11:09:37,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2023-04-01 11:09:37,097 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2023-04-01 11:09:37,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:09:37,097 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2023-04-01 11:09:37,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:09:37,097 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2023-04-01 11:09:37,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-01 11:09:37,098 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:09:37,098 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:09:37,103 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 11:09:37,303 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 [2023-04-01 11:09:37,303 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:09:37,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:09:37,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1754420621, now seen corresponding path program 2 times [2023-04-01 11:09:37,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:09:37,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000699998] [2023-04-01 11:09:37,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:09:37,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:09:37,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:09:37,546 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:09:37,546 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:09:37,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000699998] [2023-04-01 11:09:37,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000699998] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:09:37,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587729505] [2023-04-01 11:09:37,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 11:09:37,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:09:37,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:09:37,547 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:09:37,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 11:09:37,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 11:09:37,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 11:09:37,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 11:09:37,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:09:37,605 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:09:37,605 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:09:37,752 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:09:37,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587729505] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:09:37,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [387640067] [2023-04-01 11:09:37,753 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-04-01 11:09:37,753 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:09:37,753 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:09:37,753 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:09:37,754 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:09:37,776 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:09:37,863 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 56 for LOIs [2023-04-01 11:09:37,876 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:09:37,878 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:09:38,228 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '317#(and (= (select |#length| 3) 12) (= 2 (select |#length| 1)) (= 17 (select |#length| 2)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:09:38,228 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:09:38,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:09:38,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 17 [2023-04-01 11:09:38,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774915273] [2023-04-01 11:09:38,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 11:09:38,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 11:09:38,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:09:38,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 11:09:38,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2023-04-01 11:09:38,230 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:09:38,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:09:38,249 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2023-04-01 11:09:38,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 11:09:38,249 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-04-01 11:09:38,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:09:38,250 INFO L225 Difference]: With dead ends: 26 [2023-04-01 11:09:38,250 INFO L226 Difference]: Without dead ends: 21 [2023-04-01 11:09:38,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2023-04-01 11:09:38,251 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:09:38,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:09:38,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-01 11:09:38,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-04-01 11:09:38,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 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) [2023-04-01 11:09:38,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2023-04-01 11:09:38,253 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 14 [2023-04-01 11:09:38,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:09:38,253 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2023-04-01 11:09:38,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:09:38,254 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2023-04-01 11:09:38,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 11:09:38,254 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:09:38,254 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:09:38,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 11:09:38,458 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 [2023-04-01 11:09:38,459 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:09:38,459 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:09:38,459 INFO L85 PathProgramCache]: Analyzing trace with hash -51206733, now seen corresponding path program 3 times [2023-04-01 11:09:38,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:09:38,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055341946] [2023-04-01 11:09:38,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:09:38,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:09:38,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:09:38,730 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:09:38,730 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:09:38,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055341946] [2023-04-01 11:09:38,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055341946] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:09:38,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767567489] [2023-04-01 11:09:38,731 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 11:09:38,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:09:38,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:09:38,732 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:09:38,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 11:09:38,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 11:09:38,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 11:09:38,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 11:09:38,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:09:38,802 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:09:38,802 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:09:39,268 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:09:39,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767567489] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:09:39,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1290416800] [2023-04-01 11:09:39,270 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-04-01 11:09:39,270 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:09:39,271 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:09:39,272 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:09:39,272 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:09:39,306 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:09:39,381 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 56 for LOIs [2023-04-01 11:09:39,393 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:09:39,395 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:09:39,790 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '554#(and (= (select |#length| 3) 12) (= 2 (select |#length| 1)) (= 17 (select |#length| 2)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:09:39,790 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:09:39,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:09:39,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 29 [2023-04-01 11:09:39,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916533661] [2023-04-01 11:09:39,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 11:09:39,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-04-01 11:09:39,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:09:39,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-04-01 11:09:39,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=974, Unknown=0, NotChecked=0, Total=1332 [2023-04-01 11:09:39,792 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:09:39,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:09:39,822 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2023-04-01 11:09:39,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-01 11:09:39,822 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-04-01 11:09:39,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:09:39,823 INFO L225 Difference]: With dead ends: 38 [2023-04-01 11:09:39,823 INFO L226 Difference]: Without dead ends: 33 [2023-04-01 11:09:39,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=358, Invalid=974, Unknown=0, NotChecked=0, Total=1332 [2023-04-01 11:09:39,824 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:09:39,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:09:39,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-01 11:09:39,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-04-01 11:09:39,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 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) [2023-04-01 11:09:39,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2023-04-01 11:09:39,827 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 20 [2023-04-01 11:09:39,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:09:39,827 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2023-04-01 11:09:39,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:09:39,827 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2023-04-01 11:09:39,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 11:09:39,828 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:09:39,828 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:09:39,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 11:09:40,032 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 [2023-04-01 11:09:40,033 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:09:40,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:09:40,033 INFO L85 PathProgramCache]: Analyzing trace with hash 2093239347, now seen corresponding path program 4 times [2023-04-01 11:09:40,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:09:40,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815381615] [2023-04-01 11:09:40,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:09:40,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:09:40,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:09:41,069 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:09:41,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:09:41,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815381615] [2023-04-01 11:09:41,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815381615] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:09:41,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777371251] [2023-04-01 11:09:41,070 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 11:09:41,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:09:41,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:09:41,074 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:09:41,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 11:09:41,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:09:41,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-01 11:09:41,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:09:41,217 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:09:41,217 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:09:42,297 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:09:42,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777371251] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:09:42,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1933438892] [2023-04-01 11:09:42,299 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-04-01 11:09:42,299 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:09:42,299 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:09:42,299 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:09:42,299 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:09:42,339 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:09:42,466 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 56 for LOIs [2023-04-01 11:09:42,483 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:09:42,485 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:09:42,956 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '935#(and (= (select |#length| 3) 12) (= 2 (select |#length| 1)) (= 17 (select |#length| 2)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:09:42,957 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:09:42,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:09:42,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25, 25] total 53 [2023-04-01 11:09:42,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925277607] [2023-04-01 11:09:42,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 11:09:42,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-04-01 11:09:42,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:09:42,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-04-01 11:09:42,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1258, Invalid=2402, Unknown=0, NotChecked=0, Total=3660 [2023-04-01 11:09:42,960 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 53 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:09:43,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:09:43,031 INFO L93 Difference]: Finished difference Result 62 states and 85 transitions. [2023-04-01 11:09:43,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-04-01 11:09:43,032 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2023-04-01 11:09:43,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:09:43,033 INFO L225 Difference]: With dead ends: 62 [2023-04-01 11:09:43,033 INFO L226 Difference]: Without dead ends: 57 [2023-04-01 11:09:43,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1258, Invalid=2402, Unknown=0, NotChecked=0, Total=3660 [2023-04-01 11:09:43,034 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:09:43,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:09:43,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-04-01 11:09:43,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-04-01 11:09:43,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 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) [2023-04-01 11:09:43,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2023-04-01 11:09:43,040 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 32 [2023-04-01 11:09:43,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:09:43,040 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2023-04-01 11:09:43,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:09:43,040 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2023-04-01 11:09:43,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-01 11:09:43,041 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:09:43,041 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:09:43,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 11:09:43,246 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 [2023-04-01 11:09:43,246 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:09:43,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:09:43,247 INFO L85 PathProgramCache]: Analyzing trace with hash -910796493, now seen corresponding path program 5 times [2023-04-01 11:09:43,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:09:43,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521134744] [2023-04-01 11:09:43,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:09:43,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:09:43,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:09:45,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:09:45,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:09:45,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521134744] [2023-04-01 11:09:45,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521134744] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:09:45,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469984272] [2023-04-01 11:09:45,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 11:09:45,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:09:45,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:09:45,667 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:09:45,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 11:09:45,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2023-04-01 11:09:45,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 11:09:45,749 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 55 conjunts are in the unsatisfiable core [2023-04-01 11:09:45,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:09:45,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:09:45,887 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:09:49,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:09:49,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469984272] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:09:49,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1243575214] [2023-04-01 11:09:49,384 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-04-01 11:09:49,384 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:09:49,384 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:09:49,384 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:09:49,384 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:09:49,414 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:09:49,477 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 56 for LOIs [2023-04-01 11:09:49,488 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:09:49,490 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:09:50,215 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1603#(and (= (select |#length| 3) 12) (= 2 (select |#length| 1)) (= 17 (select |#length| 2)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:09:50,215 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:09:50,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:09:50,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 49, 52] total 100 [2023-04-01 11:09:50,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984448629] [2023-04-01 11:09:50,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 11:09:50,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2023-04-01 11:09:50,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:09:50,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2023-04-01 11:09:50,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3700, Invalid=7856, Unknown=0, NotChecked=0, Total=11556 [2023-04-01 11:09:50,221 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 100 states, 99 states have (on average 1.0606060606060606) internal successors, (105), 99 states have internal predecessors, (105), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:09:59,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:09:59,824 INFO L93 Difference]: Finished difference Result 113 states and 160 transitions. [2023-04-01 11:09:59,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-04-01 11:09:59,825 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 99 states have (on average 1.0606060606060606) internal successors, (105), 99 states have internal predecessors, (105), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2023-04-01 11:09:59,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:09:59,826 INFO L225 Difference]: With dead ends: 113 [2023-04-01 11:09:59,826 INFO L226 Difference]: Without dead ends: 105 [2023-04-01 11:09:59,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2666 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=8311, Invalid=15869, Unknown=0, NotChecked=0, Total=24180 [2023-04-01 11:09:59,831 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 11:09:59,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 258 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 11:09:59,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-04-01 11:09:59,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2023-04-01 11:09:59,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.01) internal successors, (101), 100 states have internal predecessors, (101), 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) [2023-04-01 11:09:59,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2023-04-01 11:09:59,852 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 56 [2023-04-01 11:09:59,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:09:59,852 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2023-04-01 11:09:59,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 99 states have (on average 1.0606060606060606) internal successors, (105), 99 states have internal predecessors, (105), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:09:59,853 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2023-04-01 11:09:59,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-04-01 11:09:59,853 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:09:59,853 INFO L195 NwaCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:09:59,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 11:10:00,058 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 [2023-04-01 11:10:00,059 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:10:00,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:10:00,059 INFO L85 PathProgramCache]: Analyzing trace with hash 844460851, now seen corresponding path program 6 times [2023-04-01 11:10:00,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:10:00,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921602967] [2023-04-01 11:10:00,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:10:00,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:10:00,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:10:07,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:10:07,421 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:10:07,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921602967] [2023-04-01 11:10:07,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921602967] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:10:07,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677187413] [2023-04-01 11:10:07,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 11:10:07,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:10:07,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:10:07,423 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:10:07,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 11:10:07,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 11:10:07,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 11:10:07,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 96 conjunts are in the unsatisfiable core [2023-04-01 11:10:07,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:10:07,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:10:07,821 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:10:14,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:10:14,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677187413] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:10:14,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [871901703] [2023-04-01 11:10:14,768 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-04-01 11:10:14,768 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:10:14,769 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:10:14,769 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:10:14,769 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:10:14,804 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 11:10:14,888 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 56 for LOIs [2023-04-01 11:10:14,917 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:10:14,919 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:10:15,431 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2949#(and (= (select |#length| 3) 12) (= 2 (select |#length| 1)) (= 17 (select |#length| 2)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (= |#NULL.base| 0))' at error location [2023-04-01 11:10:15,431 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:10:15,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:10:15,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 97, 97] total 197 [2023-04-01 11:10:15,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733480022] [2023-04-01 11:10:15,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 11:10:15,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 197 states [2023-04-01 11:10:15,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:10:15,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2023-04-01 11:10:15,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18754, Invalid=23066, Unknown=0, NotChecked=0, Total=41820 [2023-04-01 11:10:15,440 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand has 197 states, 196 states have (on average 1.030612244897959) internal successors, (202), 196 states have internal predecessors, (202), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:10:15,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:10:15,701 INFO L93 Difference]: Finished difference Result 206 states and 301 transitions. [2023-04-01 11:10:15,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2023-04-01 11:10:15,702 INFO L78 Accepts]: Start accepts. Automaton has has 197 states, 196 states have (on average 1.030612244897959) internal successors, (202), 196 states have internal predecessors, (202), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2023-04-01 11:10:15,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:10:15,703 INFO L225 Difference]: With dead ends: 206 [2023-04-01 11:10:15,703 INFO L226 Difference]: Without dead ends: 201 [2023-04-01 11:10:15,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2980 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=18754, Invalid=23066, Unknown=0, NotChecked=0, Total=41820 [2023-04-01 11:10:15,706 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:10:15,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 68 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:10:15,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-04-01 11:10:15,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2023-04-01 11:10:15,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.0051020408163265) internal successors, (197), 196 states have internal predecessors, (197), 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) [2023-04-01 11:10:15,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2023-04-01 11:10:15,728 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 104 [2023-04-01 11:10:15,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:10:15,728 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2023-04-01 11:10:15,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 197 states, 196 states have (on average 1.030612244897959) internal successors, (202), 196 states have internal predecessors, (202), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:10:15,728 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2023-04-01 11:10:15,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2023-04-01 11:10:15,730 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:10:15,730 INFO L195 NwaCegarLoop]: trace histogram [190, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:10:15,736 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-04-01 11:10:15,936 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 [2023-04-01 11:10:15,936 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:10:15,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:10:15,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1971345613, now seen corresponding path program 7 times [2023-04-01 11:10:15,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:10:15,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129104245] [2023-04-01 11:10:15,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:10:15,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:10:16,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:10:43,139 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:10:43,140 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:10:43,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129104245] [2023-04-01 11:10:43,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129104245] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:10:43,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250459660] [2023-04-01 11:10:43,140 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 11:10:43,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:10:43,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:10:43,141 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:10:43,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 11:10:43,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:10:43,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 192 conjunts are in the unsatisfiable core [2023-04-01 11:10:43,323 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:10:43,682 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:10:43,682 INFO L327 TraceCheckSpWp]: Computing backward predicates...