/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/bitvector/soft_float_2a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 03:08:09,898 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 03:08:09,900 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 03:08:09,939 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 03:08:09,940 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 03:08:09,942 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 03:08:09,946 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 03:08:09,948 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 03:08:09,949 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 03:08:09,954 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 03:08:09,956 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 03:08:09,957 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 03:08:09,958 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 03:08:09,963 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 03:08:09,964 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 03:08:09,965 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 03:08:09,966 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 03:08:09,966 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 03:08:09,968 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 03:08:09,974 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 03:08:09,975 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 03:08:09,976 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 03:08:09,977 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 03:08:09,978 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 03:08:09,985 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 03:08:09,989 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 03:08:09,989 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 03:08:09,991 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 03:08:09,991 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 03:08:09,992 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 03:08:09,992 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 03:08:09,993 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 03:08:09,993 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 03:08:09,993 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 03:08:09,994 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 03:08:09,994 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 03:08:09,995 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 03:08:10,020 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 03:08:10,021 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 03:08:10,021 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 03:08:10,021 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 03:08:10,022 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 03:08:10,022 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 03:08:10,023 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 03:08:10,023 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 03:08:10,023 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 03:08:10,023 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 03:08:10,024 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 03:08:10,024 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 03:08:10,025 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 03:08:10,025 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 03:08:10,025 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 03:08:10,025 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 03:08:10,025 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 03:08:10,025 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 03:08:10,026 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 03:08:10,027 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 03:08:10,027 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 03:08:10,027 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 03:08:10,027 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 03:08:10,027 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 03:08:10,027 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 03:08:10,028 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 03:08:10,028 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 03:08:10,028 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 03:08:10,028 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 03:08:10,028 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 03:08:10,029 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 03:08:10,029 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 03:08:10,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:08:10,029 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 03:08:10,029 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 03:08:10,030 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 03:08:10,030 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 03:08:10,030 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 03:08:10,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 03:08:10,030 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 03:08:10,030 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 03:08:10,031 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 03:08:10,280 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 03:08:10,305 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 03:08:10,307 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 03:08:10,308 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 03:08:10,309 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 03:08:10,310 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/soft_float_2a.c.cil.c [2023-04-01 03:08:11,597 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 03:08:11,802 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 03:08:11,803 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_2a.c.cil.c [2023-04-01 03:08:11,810 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d293bea6/65620989de8a444a8d0d6e972f49ad8e/FLAGd55732c42 [2023-04-01 03:08:11,825 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d293bea6/65620989de8a444a8d0d6e972f49ad8e [2023-04-01 03:08:11,828 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 03:08:11,830 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 03:08:11,834 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 03:08:11,835 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 03:08:11,838 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 03:08:11,838 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:08:11" (1/1) ... [2023-04-01 03:08:11,839 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f1178b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:08:11, skipping insertion in model container [2023-04-01 03:08:11,839 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:08:11" (1/1) ... [2023-04-01 03:08:11,845 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 03:08:11,869 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 03:08:12,012 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_2a.c.cil.c[728,741] [2023-04-01 03:08:12,061 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:08:12,074 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 03:08:12,083 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_2a.c.cil.c[728,741] [2023-04-01 03:08:12,108 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:08:12,119 INFO L208 MainTranslator]: Completed translation [2023-04-01 03:08:12,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:08:12 WrapperNode [2023-04-01 03:08:12,119 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 03:08:12,120 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 03:08:12,120 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 03:08:12,121 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 03:08:12,131 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:08:12" (1/1) ... [2023-04-01 03:08:12,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:08:12" (1/1) ... [2023-04-01 03:08:12,138 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:08:12" (1/1) ... [2023-04-01 03:08:12,139 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:08:12" (1/1) ... [2023-04-01 03:08:12,146 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:08:12" (1/1) ... [2023-04-01 03:08:12,157 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:08:12" (1/1) ... [2023-04-01 03:08:12,159 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:08:12" (1/1) ... [2023-04-01 03:08:12,160 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:08:12" (1/1) ... [2023-04-01 03:08:12,163 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 03:08:12,164 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 03:08:12,164 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 03:08:12,165 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 03:08:12,165 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:08:12" (1/1) ... [2023-04-01 03:08:12,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:08:12,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:08:12,196 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 03:08:12,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 03:08:12,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 03:08:12,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 03:08:12,237 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 03:08:12,237 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 03:08:12,238 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2023-04-01 03:08:12,238 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2023-04-01 03:08:12,238 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2023-04-01 03:08:12,238 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 03:08:12,238 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 03:08:12,239 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 03:08:12,239 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 03:08:12,239 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 03:08:12,239 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 03:08:12,239 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-04-01 03:08:12,239 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 03:08:12,240 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2023-04-01 03:08:12,240 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2023-04-01 03:08:12,240 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2023-04-01 03:08:12,240 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 03:08:12,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 03:08:12,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 03:08:12,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 03:08:12,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 03:08:12,241 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 03:08:12,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 03:08:12,318 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 03:08:12,320 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 03:08:12,907 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 03:08:13,140 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 03:08:13,140 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 03:08:13,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:08:13 BoogieIcfgContainer [2023-04-01 03:08:13,143 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 03:08:13,146 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 03:08:13,147 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 03:08:13,150 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 03:08:13,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 03:08:11" (1/3) ... [2023-04-01 03:08:13,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48817c3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:08:13, skipping insertion in model container [2023-04-01 03:08:13,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:08:12" (2/3) ... [2023-04-01 03:08:13,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48817c3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:08:13, skipping insertion in model container [2023-04-01 03:08:13,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:08:13" (3/3) ... [2023-04-01 03:08:13,153 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_2a.c.cil.c [2023-04-01 03:08:13,172 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 03:08:13,172 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 03:08:13,230 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 03:08:13,238 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;@fbc9767, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 03:08:13,239 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 03:08:13,244 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) [2023-04-01 03:08:13,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-04-01 03:08:13,254 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:08:13,255 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] [2023-04-01 03:08:13,256 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:08:13,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:08:13,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1292311374, now seen corresponding path program 1 times [2023-04-01 03:08:13,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:08:13,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767180484] [2023-04-01 03:08:13,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:08:13,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:08:13,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:08:13,790 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 03:08:13,791 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:08:13,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767180484] [2023-04-01 03:08:13,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767180484] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:08:13,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076328847] [2023-04-01 03:08:13,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:08:13,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:08:13,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:08:13,797 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:08:13,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 03:08:13,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:08:13,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 28 conjunts are in the unsatisfiable core [2023-04-01 03:08:13,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:08:14,133 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 03:08:14,133 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:08:14,603 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 03:08:14,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076328847] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:08:14,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [471677966] [2023-04-01 03:08:14,634 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-01 03:08:14,634 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:08:14,637 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:08:14,642 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:08:14,643 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:08:14,714 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 03:08:14,794 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 16 for LOIs [2023-04-01 03:08:14,826 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 03:08:14,834 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:08:15,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [471677966] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:08:15,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-01 03:08:15,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [4, 14, 13] total 36 [2023-04-01 03:08:15,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8456076] [2023-04-01 03:08:15,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:08:15,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 03:08:15,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:08:15,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 03:08:15,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1140, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 03:08:15,376 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) [2023-04-01 03:08:16,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:08:16,599 INFO L93 Difference]: Finished difference Result 118 states and 176 transitions. [2023-04-01 03:08:16,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 03:08:16,602 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 [2023-04-01 03:08:16,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:08:16,611 INFO L225 Difference]: With dead ends: 118 [2023-04-01 03:08:16,611 INFO L226 Difference]: Without dead ends: 67 [2023-04-01 03:08:16,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=208, Invalid=1684, Unknown=0, NotChecked=0, Total=1892 [2023-04-01 03:08:16,620 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 160 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 03:08:16,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 14 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 03:08:16,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-04-01 03:08:16,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2023-04-01 03:08:16,672 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) [2023-04-01 03:08:16,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2023-04-01 03:08:16,675 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 40 [2023-04-01 03:08:16,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:08:16,675 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2023-04-01 03:08:16,675 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) [2023-04-01 03:08:16,675 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2023-04-01 03:08:16,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-01 03:08:16,677 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:08:16,677 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] [2023-04-01 03:08:16,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 03:08:16,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-01 03:08:16,885 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:08:16,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:08:16,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1359893824, now seen corresponding path program 1 times [2023-04-01 03:08:16,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:08:16,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870158590] [2023-04-01 03:08:16,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:08:16,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:08:16,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:08:17,020 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 03:08:17,020 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:08:17,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870158590] [2023-04-01 03:08:17,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870158590] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:08:17,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469468404] [2023-04-01 03:08:17,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:08:17,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:08:17,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:08:17,025 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:08:17,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 03:08:17,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:08:17,118 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 28 conjunts are in the unsatisfiable core [2023-04-01 03:08:17,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:08:17,271 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 03:08:17,271 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:08:17,627 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 03:08:17,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469468404] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:08:17,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1857248137] [2023-04-01 03:08:17,631 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2023-04-01 03:08:17,631 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:08:17,632 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:08:17,632 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:08:17,632 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:08:17,655 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 03:08:17,991 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2023-04-01 03:08:18,010 INFO L197 IcfgInterpreter]: Interpreting procedure mulflt with input of size 28 for LOIs [2023-04-01 03:08:18,064 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 20 for LOIs [2023-04-01 03:08:18,142 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 03:08:18,146 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:08:19,854 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '883#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:08:19,855 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:08:19,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 03:08:19,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 14, 13] total 27 [2023-04-01 03:08:19,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062328839] [2023-04-01 03:08:19,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 03:08:19,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-04-01 03:08:19,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:08:19,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-04-01 03:08:19,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=2161, Unknown=0, NotChecked=0, Total=2352 [2023-04-01 03:08:19,858 INFO L87 Difference]: Start difference. First operand 56 states and 72 transitions. Second operand has 27 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 5 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (16), 8 states have call predecessors, (16), 4 states have call successors, (16) [2023-04-01 03:08:20,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:08:20,708 INFO L93 Difference]: Finished difference Result 166 states and 250 transitions. [2023-04-01 03:08:20,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-04-01 03:08:20,711 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 5 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (16), 8 states have call predecessors, (16), 4 states have call successors, (16) Word has length 45 [2023-04-01 03:08:20,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:08:20,714 INFO L225 Difference]: With dead ends: 166 [2023-04-01 03:08:20,714 INFO L226 Difference]: Without dead ends: 122 [2023-04-01 03:08:20,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1250 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=365, Invalid=4057, Unknown=0, NotChecked=0, Total=4422 [2023-04-01 03:08:20,718 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 148 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 03:08:20,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 518 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 03:08:20,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-04-01 03:08:20,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 78. [2023-04-01 03:08:20,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 58 states have (on average 1.3103448275862069) internal successors, (76), 60 states have internal predecessors, (76), 12 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2023-04-01 03:08:20,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 100 transitions. [2023-04-01 03:08:20,770 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 100 transitions. Word has length 45 [2023-04-01 03:08:20,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:08:20,770 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 100 transitions. [2023-04-01 03:08:20,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 5 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (16), 8 states have call predecessors, (16), 4 states have call successors, (16) [2023-04-01 03:08:20,771 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 100 transitions. [2023-04-01 03:08:20,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-01 03:08:20,772 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:08:20,772 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] [2023-04-01 03:08:20,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-01 03:08:20,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-04-01 03:08:20,973 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:08:20,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:08:20,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1648552138, now seen corresponding path program 1 times [2023-04-01 03:08:20,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:08:20,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594667093] [2023-04-01 03:08:20,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:08:20,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:08:20,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:08:21,079 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 03:08:21,080 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:08:21,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594667093] [2023-04-01 03:08:21,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594667093] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:08:21,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866272399] [2023-04-01 03:08:21,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:08:21,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:08:21,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:08:21,093 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:08:21,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 03:08:21,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:08:21,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 03:08:21,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:08:21,186 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 03:08:21,187 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:08:21,255 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 03:08:21,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866272399] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:08:21,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1691179989] [2023-04-01 03:08:21,260 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2023-04-01 03:08:21,260 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:08:21,260 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:08:21,260 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:08:21,260 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:08:21,276 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 03:08:21,563 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2023-04-01 03:08:21,567 INFO L197 IcfgInterpreter]: Interpreting procedure mulflt with input of size 13 for LOIs [2023-04-01 03:08:21,572 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 20 for LOIs [2023-04-01 03:08:21,624 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 03:08:21,630 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:08:22,552 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1586#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:08:22,552 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:08:22,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 03:08:22,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-04-01 03:08:22,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938735554] [2023-04-01 03:08:22,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 03:08:22,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 03:08:22,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:08:22,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 03:08:22,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1157, Unknown=0, NotChecked=0, Total=1332 [2023-04-01 03:08:22,555 INFO L87 Difference]: Start difference. First operand 78 states and 100 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) [2023-04-01 03:08:22,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:08:22,786 INFO L93 Difference]: Finished difference Result 217 states and 307 transitions. [2023-04-01 03:08:22,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 03:08:22,786 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 [2023-04-01 03:08:22,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:08:22,788 INFO L225 Difference]: With dead ends: 217 [2023-04-01 03:08:22,788 INFO L226 Difference]: Without dead ends: 149 [2023-04-01 03:08:22,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=210, Invalid=1430, Unknown=0, NotChecked=0, Total=1640 [2023-04-01 03:08:22,791 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 33 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 03:08:22,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 242 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 03:08:22,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-04-01 03:08:22,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 95. [2023-04-01 03:08:22,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 75 states have (on average 1.3066666666666666) internal successors, (98), 77 states have internal predecessors, (98), 12 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2023-04-01 03:08:22,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 122 transitions. [2023-04-01 03:08:22,820 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 122 transitions. Word has length 47 [2023-04-01 03:08:22,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:08:22,820 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 122 transitions. [2023-04-01 03:08:22,821 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) [2023-04-01 03:08:22,821 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 122 transitions. [2023-04-01 03:08:22,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-01 03:08:22,823 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:08:22,823 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] [2023-04-01 03:08:22,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 03:08:23,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:08:23,035 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:08:23,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:08:23,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1577993370, now seen corresponding path program 1 times [2023-04-01 03:08:23,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:08:23,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128979191] [2023-04-01 03:08:23,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:08:23,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:08:23,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:08:23,268 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 03:08:23,268 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:08:23,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128979191] [2023-04-01 03:08:23,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128979191] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:08:23,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486740331] [2023-04-01 03:08:23,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:08:23,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:08:23,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:08:23,273 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:08:23,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 03:08:23,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:08:23,344 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 27 conjunts are in the unsatisfiable core [2023-04-01 03:08:23,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:08:23,494 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 03:08:23,494 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:08:24,109 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 03:08:24,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486740331] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 03:08:24,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 03:08:24,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6, 12] total 21 [2023-04-01 03:08:24,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691230364] [2023-04-01 03:08:24,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:08:24,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 03:08:24,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:08:24,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 03:08:24,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2023-04-01 03:08:24,112 INFO L87 Difference]: Start difference. First operand 95 states and 122 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) [2023-04-01 03:08:24,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:08:24,266 INFO L93 Difference]: Finished difference Result 115 states and 149 transitions. [2023-04-01 03:08:24,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 03:08:24,267 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 [2023-04-01 03:08:24,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:08:24,268 INFO L225 Difference]: With dead ends: 115 [2023-04-01 03:08:24,268 INFO L226 Difference]: Without dead ends: 106 [2023-04-01 03:08:24,269 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 [2023-04-01 03:08:24,270 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 25 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 03:08:24,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 266 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 03:08:24,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-04-01 03:08:24,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 101. [2023-04-01 03:08:24,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 78 states have (on average 1.294871794871795) internal successors, (101), 82 states have internal predecessors, (101), 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) [2023-04-01 03:08:24,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 131 transitions. [2023-04-01 03:08:24,312 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 131 transitions. Word has length 49 [2023-04-01 03:08:24,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:08:24,313 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 131 transitions. [2023-04-01 03:08:24,314 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) [2023-04-01 03:08:24,314 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 131 transitions. [2023-04-01 03:08:24,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-01 03:08:24,324 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:08:24,324 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 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] [2023-04-01 03:08:24,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 03:08:24,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:08:24,532 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:08:24,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:08:24,532 INFO L85 PathProgramCache]: Analyzing trace with hash -2090623940, now seen corresponding path program 1 times [2023-04-01 03:08:24,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:08:24,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470435455] [2023-04-01 03:08:24,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:08:24,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:08:24,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:08:24,689 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 03:08:24,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:08:24,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470435455] [2023-04-01 03:08:24,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470435455] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:08:24,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035425871] [2023-04-01 03:08:24,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:08:24,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:08:24,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:08:24,691 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:08:24,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 03:08:24,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:08:24,785 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2023-04-01 03:08:24,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:08:24,821 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 03:08:24,822 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 03:08:24,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035425871] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:08:24,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 03:08:24,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-04-01 03:08:24,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052380232] [2023-04-01 03:08:24,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:08:24,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 03:08:24,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:08:24,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 03:08:24,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-04-01 03:08:24,825 INFO L87 Difference]: Start difference. First operand 101 states and 131 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-01 03:08:24,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:08:24,923 INFO L93 Difference]: Finished difference Result 181 states and 229 transitions. [2023-04-01 03:08:24,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 03:08:24,924 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 53 [2023-04-01 03:08:24,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:08:24,927 INFO L225 Difference]: With dead ends: 181 [2023-04-01 03:08:24,927 INFO L226 Difference]: Without dead ends: 81 [2023-04-01 03:08:24,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-04-01 03:08:24,933 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 25 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 03:08:24,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 91 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 03:08:24,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-04-01 03:08:24,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 69. [2023-04-01 03:08:24,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 55 states have internal predecessors, (68), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-01 03:08:24,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 83 transitions. [2023-04-01 03:08:24,965 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 83 transitions. Word has length 53 [2023-04-01 03:08:24,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:08:24,965 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 83 transitions. [2023-04-01 03:08:24,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-01 03:08:24,965 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 83 transitions. [2023-04-01 03:08:24,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-01 03:08:24,966 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:08:24,967 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, 1] [2023-04-01 03:08:24,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 03:08:25,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:08:25,182 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:08:25,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:08:25,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1013457835, now seen corresponding path program 1 times [2023-04-01 03:08:25,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:08:25,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686886416] [2023-04-01 03:08:25,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:08:25,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:08:25,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:08:25,371 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 03:08:25,371 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:08:25,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686886416] [2023-04-01 03:08:25,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686886416] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:08:25,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681380039] [2023-04-01 03:08:25,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:08:25,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:08:25,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:08:25,373 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:08:25,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 03:08:25,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:08:25,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-01 03:08:25,442 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:08:25,521 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 03:08:25,521 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:08:25,868 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 03:08:25,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681380039] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:08:25,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1660507698] [2023-04-01 03:08:25,871 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2023-04-01 03:08:25,871 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:08:25,871 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:08:25,871 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:08:25,871 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:08:25,886 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 03:08:26,189 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2023-04-01 03:08:26,200 INFO L197 IcfgInterpreter]: Interpreting procedure mulflt with input of size 28 for LOIs [2023-04-01 03:08:26,230 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-01 03:08:26,317 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 20 for LOIs [2023-04-01 03:08:26,409 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 03:08:26,413 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:08:27,918 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3549#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:08:27,918 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:08:27,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 03:08:27,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 8] total 19 [2023-04-01 03:08:27,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266235878] [2023-04-01 03:08:27,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 03:08:27,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-01 03:08:27,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:08:27,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-01 03:08:27,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1634, Unknown=0, NotChecked=0, Total=1806 [2023-04-01 03:08:27,921 INFO L87 Difference]: Start difference. First operand 69 states and 83 transitions. Second operand has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 4 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) [2023-04-01 03:08:28,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:08:28,328 INFO L93 Difference]: Finished difference Result 140 states and 177 transitions. [2023-04-01 03:08:28,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-01 03:08:28,329 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 4 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) Word has length 53 [2023-04-01 03:08:28,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:08:28,330 INFO L225 Difference]: With dead ends: 140 [2023-04-01 03:08:28,330 INFO L226 Difference]: Without dead ends: 86 [2023-04-01 03:08:28,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 121 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=292, Invalid=2678, Unknown=0, NotChecked=0, Total=2970 [2023-04-01 03:08:28,332 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 84 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 03:08:28,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 328 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 03:08:28,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-04-01 03:08:28,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 67. [2023-04-01 03:08:28,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 53 states have internal predecessors, (64), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 03:08:28,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2023-04-01 03:08:28,347 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 53 [2023-04-01 03:08:28,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:08:28,348 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2023-04-01 03:08:28,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 4 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) [2023-04-01 03:08:28,348 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2023-04-01 03:08:28,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 03:08:28,349 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:08:28,349 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 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] [2023-04-01 03:08:28,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 03:08:28,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:08:28,553 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:08:28,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:08:28,553 INFO L85 PathProgramCache]: Analyzing trace with hash -867803752, now seen corresponding path program 2 times [2023-04-01 03:08:28,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:08:28,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140391835] [2023-04-01 03:08:28,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:08:28,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:08:28,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:08:28,749 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-04-01 03:08:28,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:08:28,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140391835] [2023-04-01 03:08:28,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140391835] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:08:28,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737204200] [2023-04-01 03:08:28,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 03:08:28,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:08:28,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:08:28,751 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:08:28,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 03:08:28,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 03:08:28,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:08:28,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 38 conjunts are in the unsatisfiable core [2023-04-01 03:08:28,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:08:29,078 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-04-01 03:08:29,079 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 03:08:29,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737204200] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:08:29,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 03:08:29,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [7] total 20 [2023-04-01 03:08:29,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496204710] [2023-04-01 03:08:29,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:08:29,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 03:08:29,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:08:29,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 03:08:29,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2023-04-01 03:08:29,086 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 15 states, 10 states have (on average 3.0) internal successors, (30), 11 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 03:08:29,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:08:29,373 INFO L93 Difference]: Finished difference Result 90 states and 107 transitions. [2023-04-01 03:08:29,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 03:08:29,374 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 10 states have (on average 3.0) internal successors, (30), 11 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 60 [2023-04-01 03:08:29,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:08:29,374 INFO L225 Difference]: With dead ends: 90 [2023-04-01 03:08:29,374 INFO L226 Difference]: Without dead ends: 83 [2023-04-01 03:08:29,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2023-04-01 03:08:29,377 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 11 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 03:08:29,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 598 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 03:08:29,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-04-01 03:08:29,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 75. [2023-04-01 03:08:29,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 57 states have (on average 1.1929824561403508) internal successors, (68), 59 states have internal predecessors, (68), 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) [2023-04-01 03:08:29,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2023-04-01 03:08:29,402 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 60 [2023-04-01 03:08:29,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:08:29,402 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2023-04-01 03:08:29,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 10 states have (on average 3.0) internal successors, (30), 11 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-04-01 03:08:29,403 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2023-04-01 03:08:29,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 03:08:29,403 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:08:29,403 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 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, 1, 1, 1] [2023-04-01 03:08:29,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 03:08:29,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:08:29,605 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:08:29,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:08:29,606 INFO L85 PathProgramCache]: Analyzing trace with hash -373557179, now seen corresponding path program 1 times [2023-04-01 03:08:29,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:08:29,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926361957] [2023-04-01 03:08:29,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:08:29,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:08:29,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:08:29,752 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 03:08:29,752 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:08:29,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926361957] [2023-04-01 03:08:29,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926361957] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:08:29,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294036090] [2023-04-01 03:08:29,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:08:29,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:08:29,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:08:29,757 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:08:29,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 03:08:29,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:08:29,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 26 conjunts are in the unsatisfiable core [2023-04-01 03:08:29,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:08:30,016 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-04-01 03:08:30,016 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:08:30,357 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-04-01 03:08:30,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294036090] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:08:30,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [617500822] [2023-04-01 03:08:30,359 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2023-04-01 03:08:30,360 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:08:30,360 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:08:30,360 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:08:30,360 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:08:30,395 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 03:08:30,653 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2023-04-01 03:08:30,661 INFO L197 IcfgInterpreter]: Interpreting procedure mulflt with input of size 28 for LOIs [2023-04-01 03:08:30,696 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-01 03:08:30,796 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 20 for LOIs [2023-04-01 03:08:30,899 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 03:08:30,904 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 03:08:32,508 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4723#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 03:08:32,508 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 03:08:32,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 03:08:32,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 14, 14] total 30 [2023-04-01 03:08:32,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552625966] [2023-04-01 03:08:32,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 03:08:32,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-04-01 03:08:32,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:08:32,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-04-01 03:08:32,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=2659, Unknown=0, NotChecked=0, Total=2862 [2023-04-01 03:08:32,511 INFO L87 Difference]: Start difference. First operand 75 states and 90 transitions. Second operand has 30 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 24 states have internal predecessors, (65), 7 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (13), 8 states have call predecessors, (13), 6 states have call successors, (13) [2023-04-01 03:08:33,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:08:33,205 INFO L93 Difference]: Finished difference Result 151 states and 189 transitions. [2023-04-01 03:08:33,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-01 03:08:33,205 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 24 states have internal predecessors, (65), 7 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (13), 8 states have call predecessors, (13), 6 states have call successors, (13) Word has length 60 [2023-04-01 03:08:33,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:08:33,206 INFO L225 Difference]: With dead ends: 151 [2023-04-01 03:08:33,206 INFO L226 Difference]: Without dead ends: 100 [2023-04-01 03:08:33,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 962 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=307, Invalid=3853, Unknown=0, NotChecked=0, Total=4160 [2023-04-01 03:08:33,207 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 59 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 03:08:33,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 748 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 854 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 03:08:33,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-04-01 03:08:33,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 75. [2023-04-01 03:08:33,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 59 states have internal predecessors, (67), 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) [2023-04-01 03:08:33,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 89 transitions. [2023-04-01 03:08:33,224 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 89 transitions. Word has length 60 [2023-04-01 03:08:33,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:08:33,225 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 89 transitions. [2023-04-01 03:08:33,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 24 states have internal predecessors, (65), 7 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (13), 8 states have call predecessors, (13), 6 states have call successors, (13) [2023-04-01 03:08:33,225 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 89 transitions. [2023-04-01 03:08:33,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-04-01 03:08:33,225 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:08:33,225 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, 1] [2023-04-01 03:08:33,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 03:08:33,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-04-01 03:08:33,426 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:08:33,426 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:08:33,427 INFO L85 PathProgramCache]: Analyzing trace with hash -408357903, now seen corresponding path program 2 times [2023-04-01 03:08:33,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:08:33,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059509407] [2023-04-01 03:08:33,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:08:33,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:08:33,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:08:33,612 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 03:08:33,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:08:33,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059509407] [2023-04-01 03:08:33,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059509407] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:08:33,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710848830] [2023-04-01 03:08:33,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 03:08:33,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:08:33,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:08:33,614 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:08:33,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 03:08:33,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-01 03:08:33,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 03:08:33,812 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 56 conjunts are in the unsatisfiable core [2023-04-01 03:08:33,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:08:35,143 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-04-01 03:08:35,143 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:09:08,695 WARN L223 SmtUtils]: Spent 5.50s on a formula simplification. DAG size of input: 172 DAG size of output: 166 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)