/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 21:06:39,063 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 21:06:39,065 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 21:06:39,096 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 21:06:39,097 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 21:06:39,099 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 21:06:39,102 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 21:06:39,104 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 21:06:39,105 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 21:06:39,110 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 21:06:39,112 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 21:06:39,113 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 21:06:39,113 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 21:06:39,117 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 21:06:39,119 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 21:06:39,120 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 21:06:39,120 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 21:06:39,121 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 21:06:39,122 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 21:06:39,127 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 21:06:39,127 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 21:06:39,128 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 21:06:39,129 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 21:06:39,131 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 21:06:39,135 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-31 21:06:39,138 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 21:06:39,138 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 21:06:39,140 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 21:06:39,140 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 21:06:39,141 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 21:06:39,141 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 21:06:39,141 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 21:06:39,142 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 21:06:39,142 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 21:06:39,142 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 21:06:39,143 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 21:06:39,144 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-03-31 21:06:39,177 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 21:06:39,177 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 21:06:39,178 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 21:06:39,178 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 21:06:39,178 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 21:06:39,179 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 21:06:39,179 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 21:06:39,179 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 21:06:39,179 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 21:06:39,179 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 21:06:39,180 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 21:06:39,180 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 21:06:39,180 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 21:06:39,180 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 21:06:39,180 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 21:06:39,180 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 21:06:39,181 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 21:06:39,181 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 21:06:39,181 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 21:06:39,181 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 21:06:39,181 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 21:06:39,181 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 21:06:39,182 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 21:06:39,182 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 21:06:39,182 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 21:06:39,182 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 21:06:39,182 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 21:06:39,182 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 21:06:39,182 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 21:06:39,183 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 21:06:39,183 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 21:06:39,183 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 21:06:39,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:06:39,183 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 21:06:39,183 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 21:06:39,184 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 21:06:39,184 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 21:06:39,184 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 21:06:39,184 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 21:06:39,184 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 21:06:39,184 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 21:06:39,184 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 21:06:39,385 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 21:06:39,403 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 21:06:39,405 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 21:06:39,406 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 21:06:39,406 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 21:06:39,407 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2023-03-31 21:06:40,504 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 21:06:40,725 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 21:06:40,726 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2023-03-31 21:06:40,737 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d12188575/4e71caba3c43454fad56588b3cfcf0d5/FLAGfa3e2ee18 [2023-03-31 21:06:40,752 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d12188575/4e71caba3c43454fad56588b3cfcf0d5 [2023-03-31 21:06:40,754 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 21:06:40,756 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 21:06:40,759 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 21:06:40,759 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 21:06:40,762 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 21:06:40,762 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:06:40" (1/1) ... [2023-03-31 21:06:40,764 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b40dfa7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:06:40, skipping insertion in model container [2023-03-31 21:06:40,764 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:06:40" (1/1) ... [2023-03-31 21:06:40,771 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 21:06:40,808 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 21:06:40,917 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/bitvector/soft_float_3a.c.cil.c[728,741] [2023-03-31 21:06:40,966 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:06:40,974 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 21:06:40,986 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/bitvector/soft_float_3a.c.cil.c[728,741] [2023-03-31 21:06:41,013 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:06:41,028 INFO L208 MainTranslator]: Completed translation [2023-03-31 21:06:41,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:06:41 WrapperNode [2023-03-31 21:06:41,028 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 21:06:41,029 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 21:06:41,029 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 21:06:41,029 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 21:06:41,037 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:06:41" (1/1) ... [2023-03-31 21:06:41,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:06:41" (1/1) ... [2023-03-31 21:06:41,043 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:06:41" (1/1) ... [2023-03-31 21:06:41,043 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:06:41" (1/1) ... [2023-03-31 21:06:41,050 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:06:41" (1/1) ... [2023-03-31 21:06:41,055 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:06:41" (1/1) ... [2023-03-31 21:06:41,057 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:06:41" (1/1) ... [2023-03-31 21:06:41,059 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:06:41" (1/1) ... [2023-03-31 21:06:41,061 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 21:06:41,062 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 21:06:41,062 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 21:06:41,062 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 21:06:41,063 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:06:41" (1/1) ... [2023-03-31 21:06:41,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:06:41,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:06:41,102 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 21:06:41,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 21:06:41,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 21:06:41,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 21:06:41,141 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 21:06:41,145 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 21:06:41,145 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2023-03-31 21:06:41,145 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2023-03-31 21:06:41,145 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2023-03-31 21:06:41,145 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 21:06:41,146 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 21:06:41,146 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 21:06:41,146 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 21:06:41,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 21:06:41,147 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-03-31 21:06:41,147 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-03-31 21:06:41,147 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 21:06:41,147 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2023-03-31 21:06:41,147 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2023-03-31 21:06:41,147 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2023-03-31 21:06:41,147 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 21:06:41,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 21:06:41,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 21:06:41,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 21:06:41,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 21:06:41,148 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 21:06:41,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 21:06:41,214 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 21:06:41,216 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 21:06:41,659 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 21:06:41,883 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 21:06:41,883 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-03-31 21:06:41,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:06:41 BoogieIcfgContainer [2023-03-31 21:06:41,886 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 21:06:41,889 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 21:06:41,889 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 21:06:41,892 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 21:06:41,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 09:06:40" (1/3) ... [2023-03-31 21:06:41,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79807841 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:06:41, skipping insertion in model container [2023-03-31 21:06:41,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:06:41" (2/3) ... [2023-03-31 21:06:41,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79807841 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:06:41, skipping insertion in model container [2023-03-31 21:06:41,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:06:41" (3/3) ... [2023-03-31 21:06:41,894 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_3a.c.cil.c [2023-03-31 21:06:41,908 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 21:06:41,909 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 21:06:41,962 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 21:06:41,967 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;@571fba93, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 21:06:41,968 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 21:06:41,972 INFO L276 IsEmpty]: Start isEmpty. Operand has 57 states, 40 states have (on average 1.5) internal successors, (60), 42 states have internal predecessors, (60), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-03-31 21:06:41,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-03-31 21:06:41,980 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:06:41,981 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:06:41,981 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:06:41,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:06:41,985 INFO L85 PathProgramCache]: Analyzing trace with hash -790343142, now seen corresponding path program 1 times [2023-03-31 21:06:41,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:06:41,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484471999] [2023-03-31 21:06:41,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:06:41,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:06:42,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:06:42,412 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-03-31 21:06:42,414 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:06:42,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484471999] [2023-03-31 21:06:42,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484471999] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:06:42,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170766025] [2023-03-31 21:06:42,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:06:42,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:06:42,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:06:42,418 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 21:06:42,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 21:06:42,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:06:42,501 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 28 conjunts are in the unsatisfiable core [2023-03-31 21:06:42,507 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:06:42,721 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-03-31 21:06:42,722 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:06:43,242 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-03-31 21:06:43,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170766025] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:06:43,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2125267135] [2023-03-31 21:06:43,265 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-03-31 21:06:43,266 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:06:43,268 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:06:43,273 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:06:43,273 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:06:43,327 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 21:06:43,389 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 16 for LOIs [2023-03-31 21:06:43,410 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 21:06:43,415 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 21:06:43,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [2125267135] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:06:43,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-03-31 21:06:43,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [4, 15, 13] total 37 [2023-03-31 21:06:43,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862379235] [2023-03-31 21:06:43,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:06:43,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-31 21:06:43,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:06:43,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-31 21:06:43,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1213, Unknown=0, NotChecked=0, Total=1332 [2023-03-31 21:06:43,919 INFO L87 Difference]: Start difference. First operand has 57 states, 40 states have (on average 1.5) internal successors, (60), 42 states have internal predecessors, (60), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 12 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-03-31 21:06:45,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:06:45,053 INFO L93 Difference]: Finished difference Result 118 states and 176 transitions. [2023-03-31 21:06:45,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-03-31 21:06:45,055 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2023-03-31 21:06:45,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:06:45,062 INFO L225 Difference]: With dead ends: 118 [2023-03-31 21:06:45,062 INFO L226 Difference]: Without dead ends: 67 [2023-03-31 21:06:45,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=205, Invalid=1775, Unknown=0, NotChecked=0, Total=1980 [2023-03-31 21:06:45,068 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 212 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 21:06:45,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 10 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 21:06:45,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-03-31 21:06:45,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2023-03-31 21:06:45,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 43 states have internal predecessors, (57), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-03-31 21:06:45,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2023-03-31 21:06:45,129 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 40 [2023-03-31 21:06:45,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:06:45,130 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2023-03-31 21:06:45,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2023-03-31 21:06:45,130 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2023-03-31 21:06:45,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-03-31 21:06:45,133 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:06:45,134 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:06:45,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 21:06:45,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-03-31 21:06:45,341 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:06:45,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:06:45,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1920002451, now seen corresponding path program 1 times [2023-03-31 21:06:45,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:06:45,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791748572] [2023-03-31 21:06:45,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:06:45,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:06:45,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:06:45,560 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-03-31 21:06:45,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:06:45,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791748572] [2023-03-31 21:06:45,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791748572] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:06:45,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062438260] [2023-03-31 21:06:45,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:06:45,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:06:45,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:06:45,565 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 21:06:45,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 21:06:45,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:06:45,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 28 conjunts are in the unsatisfiable core [2023-03-31 21:06:45,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:06:45,761 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-03-31 21:06:45,762 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:06:46,076 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-03-31 21:06:46,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062438260] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:06:46,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [724795581] [2023-03-31 21:06:46,085 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2023-03-31 21:06:46,086 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:06:46,086 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:06:46,087 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:06:46,087 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:06:46,112 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 21:06:46,354 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-03-31 21:06:46,374 INFO L197 IcfgInterpreter]: Interpreting procedure mulflt with input of size 8 for LOIs [2023-03-31 21:06:46,388 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 14 for LOIs [2023-03-31 21:06:46,434 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 21:06:46,438 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 21:06:47,687 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '885#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 21:06:47,687 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 21:06:47,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 21:06:47,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 15, 13] total 28 [2023-03-31 21:06:47,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848474794] [2023-03-31 21:06:47,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 21:06:47,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-03-31 21:06:47,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:06:47,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-03-31 21:06:47,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=2173, Unknown=0, NotChecked=0, Total=2352 [2023-03-31 21:06:47,691 INFO L87 Difference]: Start difference. First operand 56 states and 72 transitions. Second operand has 28 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 5 states have call successors, (15), 4 states have call predecessors, (15), 7 states have return successors, (14), 8 states have call predecessors, (14), 4 states have call successors, (14) [2023-03-31 21:06:48,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:06:48,480 INFO L93 Difference]: Finished difference Result 154 states and 207 transitions. [2023-03-31 21:06:48,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-03-31 21:06:48,481 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 5 states have call successors, (15), 4 states have call predecessors, (15), 7 states have return successors, (14), 8 states have call predecessors, (14), 4 states have call successors, (14) Word has length 45 [2023-03-31 21:06:48,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:06:48,483 INFO L225 Difference]: With dead ends: 154 [2023-03-31 21:06:48,483 INFO L226 Difference]: Without dead ends: 96 [2023-03-31 21:06:48,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=286, Invalid=3374, Unknown=0, NotChecked=0, Total=3660 [2023-03-31 21:06:48,487 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 59 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-31 21:06:48,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 606 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-31 21:06:48,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-03-31 21:06:48,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 67. [2023-03-31 21:06:48,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 49 states have (on average 1.3061224489795917) internal successors, (64), 51 states have internal predecessors, (64), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2023-03-31 21:06:48,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 86 transitions. [2023-03-31 21:06:48,525 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 86 transitions. Word has length 45 [2023-03-31 21:06:48,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:06:48,526 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 86 transitions. [2023-03-31 21:06:48,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 5 states have call successors, (15), 4 states have call predecessors, (15), 7 states have return successors, (14), 8 states have call predecessors, (14), 4 states have call successors, (14) [2023-03-31 21:06:48,526 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 86 transitions. [2023-03-31 21:06:48,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-03-31 21:06:48,527 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:06:48,528 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:06:48,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 21:06:48,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-03-31 21:06:48,734 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:06:48,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:06:48,735 INFO L85 PathProgramCache]: Analyzing trace with hash -922676739, now seen corresponding path program 1 times [2023-03-31 21:06:48,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:06:48,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598660949] [2023-03-31 21:06:48,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:06:48,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:06:48,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:06:48,842 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-03-31 21:06:48,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:06:48,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598660949] [2023-03-31 21:06:48,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598660949] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:06:48,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103743421] [2023-03-31 21:06:48,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:06:48,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:06:48,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:06:48,845 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 21:06:48,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 21:06:48,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:06:48,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 21:06:48,921 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:06:48,948 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-03-31 21:06:48,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:06:49,019 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-03-31 21:06:49,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103743421] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:06:49,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [685740768] [2023-03-31 21:06:49,022 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2023-03-31 21:06:49,022 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:06:49,022 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:06:49,023 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:06:49,023 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:06:49,062 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 21:06:49,230 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 10 for LOIs [2023-03-31 21:06:49,234 INFO L197 IcfgInterpreter]: Interpreting procedure mulflt with input of size 12 for LOIs [2023-03-31 21:06:49,238 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 14 for LOIs [2023-03-31 21:06:49,267 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 21:06:49,271 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 21:06:50,093 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1537#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 21:06:50,094 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 21:06:50,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 21:06:50,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-03-31 21:06:50,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886082785] [2023-03-31 21:06:50,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 21:06:50,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-31 21:06:50,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:06:50,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-31 21:06:50,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1157, Unknown=0, NotChecked=0, Total=1332 [2023-03-31 21:06:50,096 INFO L87 Difference]: Start difference. First operand 67 states and 86 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 2 states have call successors, (11), 2 states have call predecessors, (11), 5 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-03-31 21:06:50,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:06:50,317 INFO L93 Difference]: Finished difference Result 167 states and 236 transitions. [2023-03-31 21:06:50,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-31 21:06:50,317 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 2 states have call successors, (11), 2 states have call predecessors, (11), 5 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 47 [2023-03-31 21:06:50,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:06:50,319 INFO L225 Difference]: With dead ends: 167 [2023-03-31 21:06:50,319 INFO L226 Difference]: Without dead ends: 120 [2023-03-31 21:06:50,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=210, Invalid=1430, Unknown=0, NotChecked=0, Total=1640 [2023-03-31 21:06:50,321 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 41 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 21:06:50,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 193 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 21:06:50,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-03-31 21:06:50,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 75. [2023-03-31 21:06:50,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 57 states have (on average 1.2982456140350878) internal successors, (74), 59 states have internal predecessors, (74), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2023-03-31 21:06:50,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 96 transitions. [2023-03-31 21:06:50,359 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 96 transitions. Word has length 47 [2023-03-31 21:06:50,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:06:50,360 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 96 transitions. [2023-03-31 21:06:50,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 2 states have call successors, (11), 2 states have call predecessors, (11), 5 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-03-31 21:06:50,360 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 96 transitions. [2023-03-31 21:06:50,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-03-31 21:06:50,365 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:06:50,366 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:06:50,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 21:06:50,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:06:50,573 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:06:50,573 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:06:50,573 INFO L85 PathProgramCache]: Analyzing trace with hash -2125800696, now seen corresponding path program 1 times [2023-03-31 21:06:50,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:06:50,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244565587] [2023-03-31 21:06:50,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:06:50,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:06:50,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:06:50,693 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-03-31 21:06:50,694 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:06:50,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244565587] [2023-03-31 21:06:50,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244565587] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:06:50,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226002283] [2023-03-31 21:06:50,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:06:50,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:06:50,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:06:50,695 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 21:06:50,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 21:06:50,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:06:50,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 27 conjunts are in the unsatisfiable core [2023-03-31 21:06:50,762 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:06:50,936 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-03-31 21:06:50,936 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:06:51,516 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-03-31 21:06:51,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226002283] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-31 21:06:51,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-31 21:06:51,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6, 12] total 21 [2023-03-31 21:06:51,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281602903] [2023-03-31 21:06:51,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:06:51,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 21:06:51,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:06:51,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 21:06:51,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2023-03-31 21:06:51,520 INFO L87 Difference]: Start difference. First operand 75 states and 96 transitions. Second operand has 8 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-03-31 21:06:51,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:06:51,707 INFO L93 Difference]: Finished difference Result 93 states and 117 transitions. [2023-03-31 21:06:51,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 21:06:51,707 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 49 [2023-03-31 21:06:51,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:06:51,708 INFO L225 Difference]: With dead ends: 93 [2023-03-31 21:06:51,708 INFO L226 Difference]: Without dead ends: 84 [2023-03-31 21:06:51,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2023-03-31 21:06:51,710 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 15 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 21:06:51,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 284 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 21:06:51,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-03-31 21:06:51,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 79. [2023-03-31 21:06:51,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 59 states have (on average 1.2881355932203389) internal successors, (76), 62 states have internal predecessors, (76), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) [2023-03-31 21:06:51,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 100 transitions. [2023-03-31 21:06:51,735 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 100 transitions. Word has length 49 [2023-03-31 21:06:51,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:06:51,736 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 100 transitions. [2023-03-31 21:06:51,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-03-31 21:06:51,736 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 100 transitions. [2023-03-31 21:06:51,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-03-31 21:06:51,737 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:06:51,737 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:06:51,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 21:06:51,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:06:51,947 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:06:51,948 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:06:51,948 INFO L85 PathProgramCache]: Analyzing trace with hash 285984370, now seen corresponding path program 1 times [2023-03-31 21:06:51,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:06:51,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375573207] [2023-03-31 21:06:51,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:06:51,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:06:51,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:06:52,074 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-03-31 21:06:52,074 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:06:52,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375573207] [2023-03-31 21:06:52,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375573207] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:06:52,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063222368] [2023-03-31 21:06:52,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:06:52,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:06:52,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:06:52,076 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 21:06:52,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 21:06:52,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:06:52,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 33 conjunts are in the unsatisfiable core [2023-03-31 21:06:52,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:06:52,519 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-03-31 21:06:52,520 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:06:53,438 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-03-31 21:06:53,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063222368] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:06:53,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [964486448] [2023-03-31 21:06:53,441 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2023-03-31 21:06:53,441 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:06:53,441 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:06:53,441 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:06:53,441 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:06:53,459 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 21:06:53,616 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-03-31 21:06:53,631 INFO L197 IcfgInterpreter]: Interpreting procedure mulflt with input of size 8 for LOIs [2023-03-31 21:06:53,643 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 14 for LOIs [2023-03-31 21:06:53,701 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 21:06:53,705 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 21:06:54,989 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2823#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 21:06:54,989 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 21:06:54,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 21:06:54,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 16, 14] total 32 [2023-03-31 21:06:54,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204054736] [2023-03-31 21:06:54,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 21:06:54,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-03-31 21:06:54,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:06:54,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-03-31 21:06:54,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=2738, Unknown=0, NotChecked=0, Total=2970 [2023-03-31 21:06:54,992 INFO L87 Difference]: Start difference. First operand 79 states and 100 transitions. Second operand has 32 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 28 states have internal predecessors, (72), 6 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (15), 10 states have call predecessors, (15), 6 states have call successors, (15) [2023-03-31 21:06:57,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:06:57,676 INFO L93 Difference]: Finished difference Result 250 states and 416 transitions. [2023-03-31 21:06:57,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-03-31 21:06:57,677 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 28 states have internal predecessors, (72), 6 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (15), 10 states have call predecessors, (15), 6 states have call successors, (15) Word has length 52 [2023-03-31 21:06:57,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:06:57,680 INFO L225 Difference]: With dead ends: 250 [2023-03-31 21:06:57,680 INFO L226 Difference]: Without dead ends: 196 [2023-03-31 21:06:57,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3396 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1144, Invalid=10628, Unknown=0, NotChecked=0, Total=11772 [2023-03-31 21:06:57,688 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 218 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 1082 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-03-31 21:06:57,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 532 Invalid, 1116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1082 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-03-31 21:06:57,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2023-03-31 21:06:57,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 90. [2023-03-31 21:06:57,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 67 states have (on average 1.2835820895522387) internal successors, (86), 71 states have internal predecessors, (86), 13 states have call successors, (13), 7 states have call predecessors, (13), 9 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17) [2023-03-31 21:06:57,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 116 transitions. [2023-03-31 21:06:57,747 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 116 transitions. Word has length 52 [2023-03-31 21:06:57,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:06:57,748 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 116 transitions. [2023-03-31 21:06:57,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 28 states have internal predecessors, (72), 6 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (15), 10 states have call predecessors, (15), 6 states have call successors, (15) [2023-03-31 21:06:57,748 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 116 transitions. [2023-03-31 21:06:57,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-03-31 21:06:57,750 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:06:57,750 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:06:57,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-31 21:06:57,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:06:57,956 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:06:57,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:06:57,956 INFO L85 PathProgramCache]: Analyzing trace with hash -185911285, now seen corresponding path program 1 times [2023-03-31 21:06:57,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:06:57,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377305479] [2023-03-31 21:06:57,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:06:57,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:06:57,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:06:58,135 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-03-31 21:06:58,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:06:58,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377305479] [2023-03-31 21:06:58,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377305479] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:06:58,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241867899] [2023-03-31 21:06:58,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:06:58,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:06:58,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:06:58,138 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 21:06:58,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-31 21:06:58,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:06:58,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 27 conjunts are in the unsatisfiable core [2023-03-31 21:06:58,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:06:58,401 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-03-31 21:06:58,401 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:06:58,942 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-03-31 21:06:58,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241867899] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:06:58,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [30484011] [2023-03-31 21:06:58,945 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2023-03-31 21:06:58,945 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:06:58,945 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:06:58,945 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:06:58,945 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:06:58,959 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 21:06:59,084 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 38 for LOIs [2023-03-31 21:06:59,095 INFO L197 IcfgInterpreter]: Interpreting procedure mulflt with input of size 8 for LOIs [2023-03-31 21:06:59,133 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 14 for LOIs [2023-03-31 21:06:59,182 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 21:06:59,185 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 21:07:00,148 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3811#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 21:07:00,148 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 21:07:00,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 21:07:00,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 14, 10] total 26 [2023-03-31 21:07:00,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115525339] [2023-03-31 21:07:00,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 21:07:00,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-03-31 21:07:00,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:07:00,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-03-31 21:07:00,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=2147, Unknown=0, NotChecked=0, Total=2352 [2023-03-31 21:07:00,150 INFO L87 Difference]: Start difference. First operand 90 states and 116 transitions. Second operand has 26 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 22 states have internal predecessors, (63), 6 states have call successors, (13), 2 states have call predecessors, (13), 7 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2023-03-31 21:07:00,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:07:00,930 INFO L93 Difference]: Finished difference Result 177 states and 249 transitions. [2023-03-31 21:07:00,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-03-31 21:07:00,930 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 22 states have internal predecessors, (63), 6 states have call successors, (13), 2 states have call predecessors, (13), 7 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 56 [2023-03-31 21:07:00,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:07:00,931 INFO L225 Difference]: With dead ends: 177 [2023-03-31 21:07:00,932 INFO L226 Difference]: Without dead ends: 123 [2023-03-31 21:07:00,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=392, Invalid=4030, Unknown=0, NotChecked=0, Total=4422 [2023-03-31 21:07:00,934 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 79 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-31 21:07:00,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 595 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-31 21:07:00,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-03-31 21:07:00,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 84. [2023-03-31 21:07:00,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 64 states have (on average 1.28125) internal successors, (82), 67 states have internal predecessors, (82), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2023-03-31 21:07:00,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2023-03-31 21:07:00,955 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 56 [2023-03-31 21:07:00,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:07:00,956 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2023-03-31 21:07:00,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 22 states have internal predecessors, (63), 6 states have call successors, (13), 2 states have call predecessors, (13), 7 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2023-03-31 21:07:00,956 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2023-03-31 21:07:00,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-03-31 21:07:00,956 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:07:00,956 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:07:00,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-03-31 21:07:01,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:07:01,165 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:07:01,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:07:01,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1256209865, now seen corresponding path program 1 times [2023-03-31 21:07:01,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:07:01,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966700620] [2023-03-31 21:07:01,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:07:01,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:07:01,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:07:01,273 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-03-31 21:07:01,274 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:07:01,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966700620] [2023-03-31 21:07:01,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966700620] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:07:01,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63673157] [2023-03-31 21:07:01,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:07:01,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:07:01,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:07:01,275 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 21:07:01,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-31 21:07:01,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:07:01,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-31 21:07:01,335 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:07:01,394 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 26 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-03-31 21:07:01,394 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:07:01,543 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-03-31 21:07:01,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63673157] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:07:01,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [243117872] [2023-03-31 21:07:01,545 INFO L159 IcfgInterpreter]: Started Sifa with 36 locations of interest [2023-03-31 21:07:01,545 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:07:01,545 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:07:01,545 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:07:01,546 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:07:01,557 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 21:07:01,753 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 47 for LOIs [2023-03-31 21:07:01,771 INFO L197 IcfgInterpreter]: Interpreting procedure mulflt with input of size 15 for LOIs [2023-03-31 21:07:01,784 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 14 for LOIs [2023-03-31 21:07:01,818 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 21:07:01,820 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 21:07:03,023 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4616#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 21:07:03,024 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 21:07:03,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 21:07:03,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-03-31 21:07:03,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827447185] [2023-03-31 21:07:03,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 21:07:03,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-03-31 21:07:03,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:07:03,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-03-31 21:07:03,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=2196, Unknown=0, NotChecked=0, Total=2550 [2023-03-31 21:07:03,026 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand has 20 states, 20 states have (on average 4.35) internal successors, (87), 20 states have internal predecessors, (87), 2 states have call successors, (11), 2 states have call predecessors, (11), 5 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-03-31 21:07:03,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:07:03,356 INFO L93 Difference]: Finished difference Result 239 states and 339 transitions. [2023-03-31 21:07:03,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-03-31 21:07:03,356 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.35) internal successors, (87), 20 states have internal predecessors, (87), 2 states have call successors, (11), 2 states have call predecessors, (11), 5 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 59 [2023-03-31 21:07:03,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:07:03,357 INFO L225 Difference]: With dead ends: 239 [2023-03-31 21:07:03,358 INFO L226 Difference]: Without dead ends: 194 [2023-03-31 21:07:03,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1399 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=479, Invalid=2827, Unknown=0, NotChecked=0, Total=3306 [2023-03-31 21:07:03,359 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 132 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 21:07:03,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 238 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 21:07:03,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2023-03-31 21:07:03,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 98. [2023-03-31 21:07:03,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 78 states have (on average 1.2692307692307692) internal successors, (99), 81 states have internal predecessors, (99), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2023-03-31 21:07:03,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 122 transitions. [2023-03-31 21:07:03,387 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 122 transitions. Word has length 59 [2023-03-31 21:07:03,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:07:03,387 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 122 transitions. [2023-03-31 21:07:03,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.35) internal successors, (87), 20 states have internal predecessors, (87), 2 states have call successors, (11), 2 states have call predecessors, (11), 5 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-03-31 21:07:03,387 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 122 transitions. [2023-03-31 21:07:03,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-03-31 21:07:03,388 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:07:03,388 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:07:03,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-03-31 21:07:03,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:07:03,594 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:07:03,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:07:03,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1137088221, now seen corresponding path program 2 times [2023-03-31 21:07:03,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:07:03,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813593838] [2023-03-31 21:07:03,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:07:03,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:07:03,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:07:03,803 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-03-31 21:07:03,803 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:07:03,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813593838] [2023-03-31 21:07:03,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813593838] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:07:03,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700236522] [2023-03-31 21:07:03,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 21:07:03,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:07:03,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:07:03,805 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 21:07:03,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-03-31 21:07:03,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-03-31 21:07:03,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 21:07:03,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 29 conjunts are in the unsatisfiable core [2023-03-31 21:07:03,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:07:04,142 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-03-31 21:07:04,142 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 21:07:04,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700236522] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:07:04,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 21:07:04,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [8] total 20 [2023-03-31 21:07:04,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938566219] [2023-03-31 21:07:04,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:07:04,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-03-31 21:07:04,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:07:04,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-03-31 21:07:04,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2023-03-31 21:07:04,144 INFO L87 Difference]: Start difference. First operand 98 states and 122 transitions. Second operand has 14 states, 10 states have (on average 3.0) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-03-31 21:07:04,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:07:04,472 INFO L93 Difference]: Finished difference Result 112 states and 140 transitions. [2023-03-31 21:07:04,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-03-31 21:07:04,473 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 3.0) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 62 [2023-03-31 21:07:04,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:07:04,474 INFO L225 Difference]: With dead ends: 112 [2023-03-31 21:07:04,474 INFO L226 Difference]: Without dead ends: 105 [2023-03-31 21:07:04,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2023-03-31 21:07:04,475 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 23 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 21:07:04,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 521 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 21:07:04,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-03-31 21:07:04,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 102. [2023-03-31 21:07:04,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 80 states have (on average 1.2625) internal successors, (101), 84 states have internal predecessors, (101), 12 states have call successors, (12), 7 states have call predecessors, (12), 9 states have return successors, (17), 10 states have call predecessors, (17), 10 states have call successors, (17) [2023-03-31 21:07:04,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 130 transitions. [2023-03-31 21:07:04,513 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 130 transitions. Word has length 62 [2023-03-31 21:07:04,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:07:04,514 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 130 transitions. [2023-03-31 21:07:04,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 3.0) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-03-31 21:07:04,514 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 130 transitions. [2023-03-31 21:07:04,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-03-31 21:07:04,515 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:07:04,515 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:07:04,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-03-31 21:07:04,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-03-31 21:07:04,717 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:07:04,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:07:04,717 INFO L85 PathProgramCache]: Analyzing trace with hash -926394341, now seen corresponding path program 1 times [2023-03-31 21:07:04,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:07:04,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453030425] [2023-03-31 21:07:04,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:07:04,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:07:04,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:07:04,880 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-03-31 21:07:04,880 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:07:04,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453030425] [2023-03-31 21:07:04,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453030425] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:07:04,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064969898] [2023-03-31 21:07:04,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:07:04,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:07:04,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:07:04,882 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 21:07:04,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-03-31 21:07:04,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:07:04,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 66 conjunts are in the unsatisfiable core [2023-03-31 21:07:04,950 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:07:05,643 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-03-31 21:07:05,644 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:07:07,386 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-03-31 21:07:07,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064969898] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:07:07,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1343140093] [2023-03-31 21:07:07,388 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2023-03-31 21:07:07,388 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:07:07,389 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:07:07,389 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:07:07,389 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:07:07,401 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 21:07:07,563 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-03-31 21:07:07,578 INFO L197 IcfgInterpreter]: Interpreting procedure mulflt with input of size 8 for LOIs [2023-03-31 21:07:07,592 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 14 for LOIs [2023-03-31 21:07:07,645 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 21:07:07,648 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 21:07:09,157 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6092#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 21:07:09,157 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 21:07:09,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 21:07:09,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 22, 23] total 49 [2023-03-31 21:07:09,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662214691] [2023-03-31 21:07:09,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 21:07:09,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-03-31 21:07:09,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:07:09,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-03-31 21:07:09,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=4634, Unknown=0, NotChecked=0, Total=4970 [2023-03-31 21:07:09,160 INFO L87 Difference]: Start difference. First operand 102 states and 130 transitions. Second operand has 49 states, 39 states have (on average 2.5128205128205128) internal successors, (98), 41 states have internal predecessors, (98), 8 states have call successors, (15), 3 states have call predecessors, (15), 8 states have return successors, (15), 10 states have call predecessors, (15), 7 states have call successors, (15) [2023-03-31 21:07:13,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:07:13,300 INFO L93 Difference]: Finished difference Result 310 states and 512 transitions. [2023-03-31 21:07:13,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-03-31 21:07:13,301 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 39 states have (on average 2.5128205128205128) internal successors, (98), 41 states have internal predecessors, (98), 8 states have call successors, (15), 3 states have call predecessors, (15), 8 states have return successors, (15), 10 states have call predecessors, (15), 7 states have call successors, (15) Word has length 62 [2023-03-31 21:07:13,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:07:13,303 INFO L225 Difference]: With dead ends: 310 [2023-03-31 21:07:13,303 INFO L226 Difference]: Without dead ends: 257 [2023-03-31 21:07:13,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 138 SyntacticMatches, 2 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5304 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1798, Invalid=17108, Unknown=0, NotChecked=0, Total=18906 [2023-03-31 21:07:13,308 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 375 mSDsluCounter, 879 mSDsCounter, 0 mSdLazyCounter, 2226 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 912 SdHoareTripleChecker+Invalid, 2262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-03-31 21:07:13,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 912 Invalid, 2262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2226 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-03-31 21:07:13,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2023-03-31 21:07:13,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 102. [2023-03-31 21:07:13,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 80 states have (on average 1.25) internal successors, (100), 84 states have internal predecessors, (100), 12 states have call successors, (12), 7 states have call predecessors, (12), 9 states have return successors, (17), 10 states have call predecessors, (17), 10 states have call successors, (17) [2023-03-31 21:07:13,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 129 transitions. [2023-03-31 21:07:13,352 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 129 transitions. Word has length 62 [2023-03-31 21:07:13,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:07:13,352 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 129 transitions. [2023-03-31 21:07:13,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 39 states have (on average 2.5128205128205128) internal successors, (98), 41 states have internal predecessors, (98), 8 states have call successors, (15), 3 states have call predecessors, (15), 8 states have return successors, (15), 10 states have call predecessors, (15), 7 states have call successors, (15) [2023-03-31 21:07:13,352 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 129 transitions. [2023-03-31 21:07:13,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-03-31 21:07:13,353 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:07:13,353 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:07:13,360 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-03-31 21:07:13,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:07:13,558 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:07:13,559 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:07:13,559 INFO L85 PathProgramCache]: Analyzing trace with hash 901733050, now seen corresponding path program 2 times [2023-03-31 21:07:13,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:07:13,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969790635] [2023-03-31 21:07:13,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:07:13,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:07:13,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:07:13,733 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 3 proven. 38 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-03-31 21:07:13,733 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:07:13,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969790635] [2023-03-31 21:07:13,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969790635] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:07:13,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065234622] [2023-03-31 21:07:13,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 21:07:13,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:07:13,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:07:13,735 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 21:07:13,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-03-31 21:07:13,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-03-31 21:07:13,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 21:07:13,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-03-31 21:07:13,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:07:13,927 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-03-31 21:07:13,927 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 21:07:13,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065234622] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:07:13,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 21:07:13,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [9] total 20 [2023-03-31 21:07:13,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659173276] [2023-03-31 21:07:13,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:07:13,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-03-31 21:07:13,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:07:13,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-03-31 21:07:13,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2023-03-31 21:07:13,928 INFO L87 Difference]: Start difference. First operand 102 states and 129 transitions. Second operand has 13 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2023-03-31 21:07:14,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:07:14,098 INFO L93 Difference]: Finished difference Result 124 states and 162 transitions. [2023-03-31 21:07:14,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-31 21:07:14,104 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 66 [2023-03-31 21:07:14,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:07:14,105 INFO L225 Difference]: With dead ends: 124 [2023-03-31 21:07:14,106 INFO L226 Difference]: Without dead ends: 117 [2023-03-31 21:07:14,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2023-03-31 21:07:14,106 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 6 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 21:07:14,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 509 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 21:07:14,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-03-31 21:07:14,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 112. [2023-03-31 21:07:14,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 85 states have (on average 1.2352941176470589) internal successors, (105), 90 states have internal predecessors, (105), 16 states have call successors, (16), 7 states have call predecessors, (16), 10 states have return successors, (27), 14 states have call predecessors, (27), 14 states have call successors, (27) [2023-03-31 21:07:14,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 148 transitions. [2023-03-31 21:07:14,136 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 148 transitions. Word has length 66 [2023-03-31 21:07:14,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:07:14,136 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 148 transitions. [2023-03-31 21:07:14,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2023-03-31 21:07:14,136 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 148 transitions. [2023-03-31 21:07:14,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-03-31 21:07:14,137 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:07:14,137 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:07:14,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-03-31 21:07:14,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-03-31 21:07:14,342 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:07:14,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:07:14,343 INFO L85 PathProgramCache]: Analyzing trace with hash 4710594, now seen corresponding path program 1 times [2023-03-31 21:07:14,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:07:14,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136298217] [2023-03-31 21:07:14,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:07:14,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:07:14,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:07:14,532 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-03-31 21:07:14,532 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:07:14,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136298217] [2023-03-31 21:07:14,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136298217] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:07:14,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318563349] [2023-03-31 21:07:14,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:07:14,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:07:14,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:07:14,534 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 21:07:14,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-03-31 21:07:14,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:07:14,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 15 conjunts are in the unsatisfiable core [2023-03-31 21:07:14,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:07:14,817 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 22 proven. 30 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-03-31 21:07:14,817 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:07:14,971 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-03-31 21:07:14,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318563349] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:07:14,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [558384772] [2023-03-31 21:07:14,973 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2023-03-31 21:07:14,973 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:07:14,973 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:07:14,973 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:07:14,974 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:07:14,985 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 21:07:15,106 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 38 for LOIs [2023-03-31 21:07:15,116 INFO L197 IcfgInterpreter]: Interpreting procedure mulflt with input of size 8 for LOIs [2023-03-31 21:07:15,158 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 14 for LOIs [2023-03-31 21:07:15,214 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 21:07:15,216 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 21:07:16,073 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7835#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 21:07:16,073 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 21:07:16,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 21:07:16,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-03-31 21:07:16,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608260976] [2023-03-31 21:07:16,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 21:07:16,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-03-31 21:07:16,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:07:16,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-03-31 21:07:16,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=1595, Unknown=0, NotChecked=0, Total=1892 [2023-03-31 21:07:16,075 INFO L87 Difference]: Start difference. First operand 112 states and 148 transitions. Second operand has 22 states, 22 states have (on average 4.363636363636363) internal successors, (96), 22 states have internal predecessors, (96), 2 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-03-31 21:07:21,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:07:21,075 INFO L93 Difference]: Finished difference Result 252 states and 355 transitions. [2023-03-31 21:07:21,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-03-31 21:07:21,076 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.363636363636363) internal successors, (96), 22 states have internal predecessors, (96), 2 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 66 [2023-03-31 21:07:21,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:07:21,077 INFO L225 Difference]: With dead ends: 252 [2023-03-31 21:07:21,077 INFO L226 Difference]: Without dead ends: 184 [2023-03-31 21:07:21,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 167 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1032 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=550, Invalid=2419, Unknown=1, NotChecked=0, Total=2970 [2023-03-31 21:07:21,079 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 110 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-31 21:07:21,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 421 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-31 21:07:21,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2023-03-31 21:07:21,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 107. [2023-03-31 21:07:21,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 88 states have internal predecessors, (100), 13 states have call successors, (13), 7 states have call predecessors, (13), 9 states have return successors, (20), 11 states have call predecessors, (20), 11 states have call successors, (20) [2023-03-31 21:07:21,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 133 transitions. [2023-03-31 21:07:21,122 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 133 transitions. Word has length 66 [2023-03-31 21:07:21,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:07:21,122 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 133 transitions. [2023-03-31 21:07:21,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.363636363636363) internal successors, (96), 22 states have internal predecessors, (96), 2 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-03-31 21:07:21,123 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 133 transitions. [2023-03-31 21:07:21,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-03-31 21:07:21,125 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:07:21,125 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:07:21,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-03-31 21:07:21,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-03-31 21:07:21,331 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:07:21,332 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:07:21,332 INFO L85 PathProgramCache]: Analyzing trace with hash 107312201, now seen corresponding path program 2 times [2023-03-31 21:07:21,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:07:21,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926197504] [2023-03-31 21:07:21,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:07:21,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:07:21,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:07:21,553 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 3 proven. 162 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-03-31 21:07:21,553 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:07:21,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926197504] [2023-03-31 21:07:21,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926197504] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:07:21,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6521593] [2023-03-31 21:07:21,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 21:07:21,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:07:21,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:07:21,557 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 21:07:21,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-03-31 21:07:21,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2023-03-31 21:07:21,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 21:07:21,811 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 13 conjunts are in the unsatisfiable core [2023-03-31 21:07:21,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:07:21,968 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 20 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-03-31 21:07:21,968 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:07:22,351 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 3 proven. 162 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-03-31 21:07:22,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6521593] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:07:22,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1191388171] [2023-03-31 21:07:22,352 INFO L159 IcfgInterpreter]: Started Sifa with 36 locations of interest [2023-03-31 21:07:22,352 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:07:22,352 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:07:22,353 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:07:22,353 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:07:22,361 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 21:07:22,500 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 47 for LOIs [2023-03-31 21:07:22,515 INFO L197 IcfgInterpreter]: Interpreting procedure mulflt with input of size 15 for LOIs [2023-03-31 21:07:22,527 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 14 for LOIs [2023-03-31 21:07:22,551 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 21:07:22,554 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 21:07:23,732 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8894#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 21:07:23,732 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 21:07:23,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 21:07:23,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 38 [2023-03-31 21:07:23,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122087707] [2023-03-31 21:07:23,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 21:07:23,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-03-31 21:07:23,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:07:23,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-03-31 21:07:23,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=792, Invalid=3900, Unknown=0, NotChecked=0, Total=4692 [2023-03-31 21:07:23,734 INFO L87 Difference]: Start difference. First operand 107 states and 133 transitions. Second operand has 38 states, 38 states have (on average 3.710526315789474) internal successors, (141), 38 states have internal predecessors, (141), 2 states have call successors, (11), 2 states have call predecessors, (11), 5 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-03-31 21:07:24,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:07:24,329 INFO L93 Difference]: Finished difference Result 391 states and 566 transitions. [2023-03-31 21:07:24,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-03-31 21:07:24,331 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.710526315789474) internal successors, (141), 38 states have internal predecessors, (141), 2 states have call successors, (11), 2 states have call predecessors, (11), 5 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 77 [2023-03-31 21:07:24,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:07:24,333 INFO L225 Difference]: With dead ends: 391 [2023-03-31 21:07:24,333 INFO L226 Difference]: Without dead ends: 334 [2023-03-31 21:07:24,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3019 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1259, Invalid=5383, Unknown=0, NotChecked=0, Total=6642 [2023-03-31 21:07:24,334 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 342 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 21:07:24,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 226 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 21:07:24,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2023-03-31 21:07:24,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 139. [2023-03-31 21:07:24,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 116 states have (on average 1.2155172413793103) internal successors, (141), 120 states have internal predecessors, (141), 13 states have call successors, (13), 7 states have call predecessors, (13), 9 states have return successors, (20), 11 states have call predecessors, (20), 11 states have call successors, (20) [2023-03-31 21:07:24,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 174 transitions. [2023-03-31 21:07:24,406 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 174 transitions. Word has length 77 [2023-03-31 21:07:24,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:07:24,407 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 174 transitions. [2023-03-31 21:07:24,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.710526315789474) internal successors, (141), 38 states have internal predecessors, (141), 2 states have call successors, (11), 2 states have call predecessors, (11), 5 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-03-31 21:07:24,407 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 174 transitions. [2023-03-31 21:07:24,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-03-31 21:07:24,408 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:07:24,408 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:07:24,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-03-31 21:07:24,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-03-31 21:07:24,614 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:07:24,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:07:24,615 INFO L85 PathProgramCache]: Analyzing trace with hash -561573646, now seen corresponding path program 3 times [2023-03-31 21:07:24,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:07:24,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597354932] [2023-03-31 21:07:24,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:07:24,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:07:24,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:07:24,980 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 3 proven. 205 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-03-31 21:07:24,980 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:07:24,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597354932] [2023-03-31 21:07:24,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597354932] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:07:24,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962873743] [2023-03-31 21:07:24,981 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 21:07:24,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:07:24,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:07:24,983 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 21:07:24,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-03-31 21:07:25,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 21:07:25,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 21:07:25,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 53 conjunts are in the unsatisfiable core [2023-03-31 21:07:25,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:07:25,769 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 2 proven. 214 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-03-31 21:07:25,769 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:07:27,341 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 7 proven. 205 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-03-31 21:07:27,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962873743] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:07:27,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [163160624] [2023-03-31 21:07:27,343 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2023-03-31 21:07:27,343 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:07:27,343 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:07:27,343 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:07:27,343 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:07:27,357 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 21:07:27,458 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2023-03-31 21:07:27,469 INFO L197 IcfgInterpreter]: Interpreting procedure mulflt with input of size 8 for LOIs [2023-03-31 21:07:27,478 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 14 for LOIs [2023-03-31 21:07:27,520 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 21:07:27,522 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 21:07:29,241 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10280#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 21:07:29,241 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 21:07:29,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 21:07:29,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 26, 24] total 62 [2023-03-31 21:07:29,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796734641] [2023-03-31 21:07:29,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 21:07:29,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-03-31 21:07:29,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:07:29,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-03-31 21:07:29,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=542, Invalid=6598, Unknown=0, NotChecked=0, Total=7140 [2023-03-31 21:07:29,245 INFO L87 Difference]: Start difference. First operand 139 states and 174 transitions. Second operand has 62 states, 58 states have (on average 2.793103448275862) internal successors, (162), 58 states have internal predecessors, (162), 6 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (15), 10 states have call predecessors, (15), 6 states have call successors, (15)