/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 [2023-04-02 15:48:42,696 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 15:48:42,698 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 15:48:42,735 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 15:48:42,735 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 15:48:42,738 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 15:48:42,740 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 15:48:42,741 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 15:48:42,742 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 15:48:42,743 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 15:48:42,743 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 15:48:42,744 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 15:48:42,745 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 15:48:42,748 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 15:48:42,749 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 15:48:42,750 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 15:48:42,750 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 15:48:42,751 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 15:48:42,752 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 15:48:42,753 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 15:48:42,754 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 15:48:42,755 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 15:48:42,756 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 15:48:42,757 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 15:48:42,759 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 15:48:42,759 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 15:48:42,760 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 15:48:42,760 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 15:48:42,761 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 15:48:42,761 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 15:48:42,762 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 15:48:42,762 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 15:48:42,763 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 15:48:42,763 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 15:48:42,764 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 15:48:42,764 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 15:48:42,765 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 15:48:42,765 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 15:48:42,765 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 15:48:42,766 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 15:48:42,766 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 15:48:42,767 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 [2023-04-02 15:48:42,797 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 15:48:42,798 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 15:48:42,798 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 15:48:42,798 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 15:48:42,799 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 15:48:42,799 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 15:48:42,799 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 15:48:42,799 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 15:48:42,799 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 15:48:42,800 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 15:48:42,800 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 15:48:42,800 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 15:48:42,800 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 15:48:42,800 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 15:48:42,800 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 15:48:42,800 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 15:48:42,801 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 15:48:42,801 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 15:48:42,801 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 15:48:42,801 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 15:48:42,801 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 15:48:42,802 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 15:48:42,802 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 15:48:42,802 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 15:48:42,802 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 15:48:42,802 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 15:48:42,802 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 15:48:42,803 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 15:48:42,803 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 15:48:42,803 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 15:48:42,803 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 15:48:42,803 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 15:48:42,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 15:48:42,803 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 15:48:42,803 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 15:48:42,804 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 15:48:42,804 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 15:48:42,804 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 15:48:42,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 15:48:42,804 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 15:48:42,804 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 15:48:42,805 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 15:48:43,008 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 15:48:43,027 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 15:48:43,029 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 15:48:43,031 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 15:48:43,031 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 15:48:43,032 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/soft_float_2a.c.cil.c [2023-04-02 15:48:44,140 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 15:48:44,314 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 15:48:44,314 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_2a.c.cil.c [2023-04-02 15:48:44,320 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe7316819/99d15ff7c8594b0fb12f75296b9aa424/FLAG1dad271ab [2023-04-02 15:48:44,332 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe7316819/99d15ff7c8594b0fb12f75296b9aa424 [2023-04-02 15:48:44,334 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 15:48:44,335 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 15:48:44,336 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 15:48:44,336 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 15:48:44,339 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 15:48:44,339 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 03:48:44" (1/1) ... [2023-04-02 15:48:44,340 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a480f60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:48:44, skipping insertion in model container [2023-04-02 15:48:44,340 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 03:48:44" (1/1) ... [2023-04-02 15:48:44,346 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 15:48:44,363 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 15:48:44,492 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] [2023-04-02 15:48:44,532 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 15:48:44,540 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 15:48:44,548 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] [2023-04-02 15:48:44,576 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 15:48:44,586 INFO L208 MainTranslator]: Completed translation [2023-04-02 15:48:44,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:48:44 WrapperNode [2023-04-02 15:48:44,587 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 15:48:44,588 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 15:48:44,588 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 15:48:44,588 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 15:48:44,595 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:48:44" (1/1) ... [2023-04-02 15:48:44,596 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:48:44" (1/1) ... [2023-04-02 15:48:44,603 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:48:44" (1/1) ... [2023-04-02 15:48:44,603 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:48:44" (1/1) ... [2023-04-02 15:48:44,611 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:48:44" (1/1) ... [2023-04-02 15:48:44,616 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:48:44" (1/1) ... [2023-04-02 15:48:44,618 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:48:44" (1/1) ... [2023-04-02 15:48:44,619 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:48:44" (1/1) ... [2023-04-02 15:48:44,621 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 15:48:44,622 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 15:48:44,622 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 15:48:44,622 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 15:48:44,623 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:48:44" (1/1) ... [2023-04-02 15:48:44,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 15:48:44,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:48:44,658 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) [2023-04-02 15:48:44,666 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 [2023-04-02 15:48:44,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 15:48:44,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 15:48:44,700 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 15:48:44,704 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 15:48:44,704 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2023-04-02 15:48:44,704 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2023-04-02 15:48:44,704 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2023-04-02 15:48:44,704 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 15:48:44,704 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 15:48:44,705 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 15:48:44,705 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 15:48:44,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 15:48:44,705 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-02 15:48:44,705 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-04-02 15:48:44,705 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 15:48:44,705 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2023-04-02 15:48:44,705 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2023-04-02 15:48:44,705 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2023-04-02 15:48:44,705 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 15:48:44,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 15:48:44,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 15:48:44,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 15:48:44,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 15:48:44,706 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 15:48:44,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 15:48:44,774 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 15:48:44,776 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 15:48:45,190 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 15:48:45,494 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 15:48:45,495 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-02 15:48:45,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 03:48:45 BoogieIcfgContainer [2023-04-02 15:48:45,497 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 15:48:45,500 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 15:48:45,500 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 15:48:45,502 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 15:48:45,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 03:48:44" (1/3) ... [2023-04-02 15:48:45,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a2725e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 03:48:45, skipping insertion in model container [2023-04-02 15:48:45,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:48:44" (2/3) ... [2023-04-02 15:48:45,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a2725e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 03:48:45, skipping insertion in model container [2023-04-02 15:48:45,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 03:48:45" (3/3) ... [2023-04-02 15:48:45,504 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_2a.c.cil.c [2023-04-02 15:48:45,518 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 15:48:45,518 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 15:48:45,570 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 15:48:45,576 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;@b74bf95, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 15:48:45,576 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 15:48:45,580 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) [2023-04-02 15:48:45,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-04-02 15:48:45,590 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:48:45,591 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] [2023-04-02 15:48:45,592 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:48:45,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:48:45,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1292311374, now seen corresponding path program 1 times [2023-04-02 15:48:45,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:48:45,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430024910] [2023-04-02 15:48:45,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:48:45,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:48:45,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:48:46,043 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 15:48:46,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:48:46,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430024910] [2023-04-02 15:48:46,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430024910] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:48:46,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102424625] [2023-04-02 15:48:46,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:48:46,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:48:46,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:48:46,048 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) [2023-04-02 15:48:46,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 15:48:46,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:48:46,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 28 conjunts are in the unsatisfiable core [2023-04-02 15:48:46,170 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:48:46,389 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 15:48:46,390 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:48:46,853 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-02 15:48:46,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102424625] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:48:46,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [548636712] [2023-04-02 15:48:46,873 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-04-02 15:48:46,873 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:48:46,876 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:48:46,883 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:48:46,884 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:48:46,935 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 15:48:47,017 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 16 for LOIs [2023-04-02 15:48:47,041 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 15:48:47,048 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:48:47,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [548636712] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:48:47,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-02 15:48:47,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [4, 14, 13] total 36 [2023-04-02 15:48:47,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275617662] [2023-04-02 15:48:47,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:48:47,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 15:48:47,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:48:47,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 15:48:47,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1140, Unknown=0, NotChecked=0, Total=1260 [2023-04-02 15:48:47,548 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) [2023-04-02 15:48:48,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:48:48,643 INFO L93 Difference]: Finished difference Result 118 states and 176 transitions. [2023-04-02 15:48:48,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 15:48:48,645 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 [2023-04-02 15:48:48,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:48:48,651 INFO L225 Difference]: With dead ends: 118 [2023-04-02 15:48:48,652 INFO L226 Difference]: Without dead ends: 67 [2023-04-02 15:48:48,655 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 [2023-04-02 15:48:48,657 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 [2023-04-02 15:48:48,658 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] [2023-04-02 15:48:48,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-04-02 15:48:48,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2023-04-02 15:48:48,706 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) [2023-04-02 15:48:48,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2023-04-02 15:48:48,713 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 40 [2023-04-02 15:48:48,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:48:48,714 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2023-04-02 15:48:48,714 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) [2023-04-02 15:48:48,714 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2023-04-02 15:48:48,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-02 15:48:48,717 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:48:48,717 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] [2023-04-02 15:48:48,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 15:48:48,923 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 [2023-04-02 15:48:48,924 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:48:48,924 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:48:48,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1359893824, now seen corresponding path program 1 times [2023-04-02 15:48:48,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:48:48,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738068194] [2023-04-02 15:48:48,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:48:48,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:48:48,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:48:49,105 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 15:48:49,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:48:49,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738068194] [2023-04-02 15:48:49,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738068194] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:48:49,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549205829] [2023-04-02 15:48:49,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:48:49,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:48:49,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:48:49,108 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) [2023-04-02 15:48:49,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 15:48:49,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:48:49,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 28 conjunts are in the unsatisfiable core [2023-04-02 15:48:49,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:48:49,351 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 15:48:49,351 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:48:49,707 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-02 15:48:49,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549205829] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:48:49,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1743858554] [2023-04-02 15:48:49,710 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2023-04-02 15:48:49,710 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:48:49,711 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:48:49,711 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:48:49,711 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:48:49,731 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 15:48:50,058 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2023-04-02 15:48:50,072 INFO L197 IcfgInterpreter]: Interpreting procedure mulflt with input of size 28 for LOIs [2023-04-02 15:48:50,121 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 20 for LOIs [2023-04-02 15:48:50,183 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 15:48:50,188 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:48:51,973 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 [2023-04-02 15:48:51,973 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:48:51,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 15:48:51,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 14, 13] total 27 [2023-04-02 15:48:51,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785788563] [2023-04-02 15:48:51,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 15:48:51,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-04-02 15:48:51,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:48:51,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-04-02 15:48:51,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=2161, Unknown=0, NotChecked=0, Total=2352 [2023-04-02 15:48:51,977 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) [2023-04-02 15:48:52,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:48:52,801 INFO L93 Difference]: Finished difference Result 166 states and 250 transitions. [2023-04-02 15:48:52,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-04-02 15:48:52,802 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 [2023-04-02 15:48:52,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:48:52,805 INFO L225 Difference]: With dead ends: 166 [2023-04-02 15:48:52,805 INFO L226 Difference]: Without dead ends: 122 [2023-04-02 15:48:52,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1250 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=365, Invalid=4057, Unknown=0, NotChecked=0, Total=4422 [2023-04-02 15:48:52,808 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 [2023-04-02 15:48:52,809 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] [2023-04-02 15:48:52,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-04-02 15:48:52,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 78. [2023-04-02 15:48:52,841 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) [2023-04-02 15:48:52,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 100 transitions. [2023-04-02 15:48:52,843 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 100 transitions. Word has length 45 [2023-04-02 15:48:52,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:48:52,843 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 100 transitions. [2023-04-02 15:48:52,843 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) [2023-04-02 15:48:52,844 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 100 transitions. [2023-04-02 15:48:52,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-02 15:48:52,845 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:48:52,845 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] [2023-04-02 15:48:52,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 15:48:53,046 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 [2023-04-02 15:48:53,046 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:48:53,047 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:48:53,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1648552138, now seen corresponding path program 1 times [2023-04-02 15:48:53,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:48:53,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139503839] [2023-04-02 15:48:53,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:48:53,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:48:53,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:48:53,125 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 15:48:53,125 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:48:53,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139503839] [2023-04-02 15:48:53,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139503839] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:48:53,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628000685] [2023-04-02 15:48:53,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:48:53,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:48:53,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:48:53,129 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) [2023-04-02 15:48:53,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 15:48:53,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:48:53,192 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 15:48:53,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:48:53,221 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-02 15:48:53,222 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:48:53,294 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 15:48:53,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628000685] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:48:53,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1495294349] [2023-04-02 15:48:53,296 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2023-04-02 15:48:53,297 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:48:53,297 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:48:53,297 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:48:53,297 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:48:53,318 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 15:48:53,579 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2023-04-02 15:48:53,582 INFO L197 IcfgInterpreter]: Interpreting procedure mulflt with input of size 13 for LOIs [2023-04-02 15:48:53,586 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 20 for LOIs [2023-04-02 15:48:53,631 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 15:48:53,634 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:48:54,530 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 [2023-04-02 15:48:54,530 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:48:54,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 15:48:54,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-04-02 15:48:54,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460403037] [2023-04-02 15:48:54,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 15:48:54,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 15:48:54,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:48:54,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 15:48:54,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1157, Unknown=0, NotChecked=0, Total=1332 [2023-04-02 15:48:54,533 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) [2023-04-02 15:48:54,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:48:54,768 INFO L93 Difference]: Finished difference Result 217 states and 307 transitions. [2023-04-02 15:48:54,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 15:48:54,768 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 [2023-04-02 15:48:54,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:48:54,770 INFO L225 Difference]: With dead ends: 217 [2023-04-02 15:48:54,770 INFO L226 Difference]: Without dead ends: 149 [2023-04-02 15:48:54,771 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 [2023-04-02 15:48:54,772 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 [2023-04-02 15:48:54,773 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] [2023-04-02 15:48:54,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-04-02 15:48:54,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 95. [2023-04-02 15:48:54,801 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) [2023-04-02 15:48:54,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 122 transitions. [2023-04-02 15:48:54,802 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 122 transitions. Word has length 47 [2023-04-02 15:48:54,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:48:54,802 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 122 transitions. [2023-04-02 15:48:54,802 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) [2023-04-02 15:48:54,802 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 122 transitions. [2023-04-02 15:48:54,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-02 15:48:54,804 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:48:54,804 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] [2023-04-02 15:48:54,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 15:48:55,009 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 [2023-04-02 15:48:55,010 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:48:55,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:48:55,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1577993370, now seen corresponding path program 1 times [2023-04-02 15:48:55,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:48:55,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931076734] [2023-04-02 15:48:55,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:48:55,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:48:55,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:48:55,133 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 15:48:55,133 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:48:55,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931076734] [2023-04-02 15:48:55,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931076734] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:48:55,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69607430] [2023-04-02 15:48:55,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:48:55,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:48:55,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:48:55,137 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) [2023-04-02 15:48:55,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 15:48:55,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:48:55,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 27 conjunts are in the unsatisfiable core [2023-04-02 15:48:55,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:48:55,348 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-02 15:48:55,349 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:48:55,925 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-02 15:48:55,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69607430] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-02 15:48:55,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-02 15:48:55,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6, 12] total 21 [2023-04-02 15:48:55,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365259734] [2023-04-02 15:48:55,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:48:55,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 15:48:55,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:48:55,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 15:48:55,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2023-04-02 15:48:55,927 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) [2023-04-02 15:48:56,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:48:56,068 INFO L93 Difference]: Finished difference Result 115 states and 149 transitions. [2023-04-02 15:48:56,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 15:48:56,070 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 [2023-04-02 15:48:56,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:48:56,071 INFO L225 Difference]: With dead ends: 115 [2023-04-02 15:48:56,071 INFO L226 Difference]: Without dead ends: 106 [2023-04-02 15:48:56,072 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 [2023-04-02 15:48:56,073 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 [2023-04-02 15:48:56,073 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] [2023-04-02 15:48:56,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-04-02 15:48:56,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 101. [2023-04-02 15:48:56,107 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) [2023-04-02 15:48:56,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 131 transitions. [2023-04-02 15:48:56,109 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 131 transitions. Word has length 49 [2023-04-02 15:48:56,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:48:56,110 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 131 transitions. [2023-04-02 15:48:56,111 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) [2023-04-02 15:48:56,111 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 131 transitions. [2023-04-02 15:48:56,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-02 15:48:56,120 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:48:56,120 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] [2023-04-02 15:48:56,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 15:48:56,326 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 [2023-04-02 15:48:56,326 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:48:56,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:48:56,327 INFO L85 PathProgramCache]: Analyzing trace with hash -2090623940, now seen corresponding path program 1 times [2023-04-02 15:48:56,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:48:56,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077422020] [2023-04-02 15:48:56,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:48:56,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:48:56,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:48:56,469 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-02 15:48:56,469 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:48:56,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077422020] [2023-04-02 15:48:56,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077422020] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:48:56,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829802185] [2023-04-02 15:48:56,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:48:56,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:48:56,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:48:56,471 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) [2023-04-02 15:48:56,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 15:48:56,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:48:56,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2023-04-02 15:48:56,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:48:56,563 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 15:48:56,564 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 15:48:56,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829802185] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:48:56,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 15:48:56,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-04-02 15:48:56,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346670691] [2023-04-02 15:48:56,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:48:56,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 15:48:56,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:48:56,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 15:48:56,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-04-02 15:48:56,568 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) [2023-04-02 15:48:56,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:48:56,655 INFO L93 Difference]: Finished difference Result 181 states and 229 transitions. [2023-04-02 15:48:56,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 15:48:56,656 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 [2023-04-02 15:48:56,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:48:56,658 INFO L225 Difference]: With dead ends: 181 [2023-04-02 15:48:56,658 INFO L226 Difference]: Without dead ends: 81 [2023-04-02 15:48:56,661 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 [2023-04-02 15:48:56,663 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 [2023-04-02 15:48:56,664 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] [2023-04-02 15:48:56,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-04-02 15:48:56,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 69. [2023-04-02 15:48:56,692 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) [2023-04-02 15:48:56,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 83 transitions. [2023-04-02 15:48:56,708 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 83 transitions. Word has length 53 [2023-04-02 15:48:56,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:48:56,708 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 83 transitions. [2023-04-02 15:48:56,708 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) [2023-04-02 15:48:56,708 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 83 transitions. [2023-04-02 15:48:56,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-02 15:48:56,709 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:48:56,709 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] [2023-04-02 15:48:56,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 15:48:56,915 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 [2023-04-02 15:48:56,915 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:48:56,916 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:48:56,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1013457835, now seen corresponding path program 1 times [2023-04-02 15:48:56,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:48:56,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174397085] [2023-04-02 15:48:56,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:48:56,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:48:56,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:48:57,058 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 15:48:57,059 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:48:57,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174397085] [2023-04-02 15:48:57,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174397085] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:48:57,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49549672] [2023-04-02 15:48:57,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:48:57,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:48:57,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:48:57,060 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) [2023-04-02 15:48:57,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 15:48:57,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:48:57,123 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-02 15:48:57,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:48:57,221 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 15:48:57,221 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:48:57,569 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-02 15:48:57,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49549672] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:48:57,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [448105828] [2023-04-02 15:48:57,572 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2023-04-02 15:48:57,572 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:48:57,572 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:48:57,572 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:48:57,572 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:48:57,589 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 15:48:57,883 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2023-04-02 15:48:57,894 INFO L197 IcfgInterpreter]: Interpreting procedure mulflt with input of size 28 for LOIs [2023-04-02 15:48:57,923 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-02 15:48:57,993 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 20 for LOIs [2023-04-02 15:48:58,075 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 15:48:58,078 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:48:59,506 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 [2023-04-02 15:48:59,506 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:48:59,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 15:48:59,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 8] total 19 [2023-04-02 15:48:59,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415269486] [2023-04-02 15:48:59,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 15:48:59,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-02 15:48:59,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:48:59,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-02 15:48:59,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1634, Unknown=0, NotChecked=0, Total=1806 [2023-04-02 15:48:59,509 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) [2023-04-02 15:48:59,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:48:59,890 INFO L93 Difference]: Finished difference Result 140 states and 177 transitions. [2023-04-02 15:48:59,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-02 15:48:59,890 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 [2023-04-02 15:48:59,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:48:59,891 INFO L225 Difference]: With dead ends: 140 [2023-04-02 15:48:59,891 INFO L226 Difference]: Without dead ends: 86 [2023-04-02 15:48:59,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 121 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=292, Invalid=2678, Unknown=0, NotChecked=0, Total=2970 [2023-04-02 15:48:59,893 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 [2023-04-02 15:48:59,893 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] [2023-04-02 15:48:59,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-04-02 15:48:59,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 67. [2023-04-02 15:48:59,905 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) [2023-04-02 15:48:59,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2023-04-02 15:48:59,906 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 53 [2023-04-02 15:48:59,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:48:59,906 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2023-04-02 15:48:59,906 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) [2023-04-02 15:48:59,906 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2023-04-02 15:48:59,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-02 15:48:59,907 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:48:59,907 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] [2023-04-02 15:48:59,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-02 15:49:00,109 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 [2023-04-02 15:49:00,109 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:49:00,110 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:49:00,110 INFO L85 PathProgramCache]: Analyzing trace with hash -867803752, now seen corresponding path program 2 times [2023-04-02 15:49:00,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:49:00,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629854893] [2023-04-02 15:49:00,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:49:00,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:49:00,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:49:00,274 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-04-02 15:49:00,274 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:49:00,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629854893] [2023-04-02 15:49:00,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629854893] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:49:00,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871614962] [2023-04-02 15:49:00,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 15:49:00,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:49:00,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:49:00,276 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) [2023-04-02 15:49:00,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 15:49:00,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-02 15:49:00,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 15:49:00,359 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 38 conjunts are in the unsatisfiable core [2023-04-02 15:49:00,360 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:49:00,555 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-04-02 15:49:00,555 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 15:49:00,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871614962] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:49:00,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 15:49:00,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [7] total 20 [2023-04-02 15:49:00,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676901511] [2023-04-02 15:49:00,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:49:00,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-02 15:49:00,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:49:00,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-02 15:49:00,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2023-04-02 15:49:00,557 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) [2023-04-02 15:49:00,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:49:00,822 INFO L93 Difference]: Finished difference Result 90 states and 107 transitions. [2023-04-02 15:49:00,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-02 15:49:00,822 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 [2023-04-02 15:49:00,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:49:00,823 INFO L225 Difference]: With dead ends: 90 [2023-04-02 15:49:00,823 INFO L226 Difference]: Without dead ends: 83 [2023-04-02 15:49:00,823 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 [2023-04-02 15:49:00,824 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, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 15:49:00,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 598 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 15:49:00,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-04-02 15:49:00,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 75. [2023-04-02 15:49:00,839 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) [2023-04-02 15:49:00,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2023-04-02 15:49:00,840 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 60 [2023-04-02 15:49:00,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:49:00,840 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2023-04-02 15:49:00,840 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) [2023-04-02 15:49:00,840 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2023-04-02 15:49:00,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-02 15:49:00,841 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:49:00,841 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] [2023-04-02 15:49:00,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-02 15:49:01,049 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 [2023-04-02 15:49:01,050 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:49:01,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:49:01,050 INFO L85 PathProgramCache]: Analyzing trace with hash -373557179, now seen corresponding path program 1 times [2023-04-02 15:49:01,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:49:01,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953349617] [2023-04-02 15:49:01,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:49:01,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:49:01,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:49:01,194 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-02 15:49:01,195 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:49:01,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953349617] [2023-04-02 15:49:01,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953349617] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:49:01,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414092623] [2023-04-02 15:49:01,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:49:01,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:49:01,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:49:01,196 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) [2023-04-02 15:49:01,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 15:49:01,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:49:01,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 26 conjunts are in the unsatisfiable core [2023-04-02 15:49:01,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:49:01,449 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-04-02 15:49:01,449 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:49:01,762 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-04-02 15:49:01,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414092623] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:49:01,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [23832180] [2023-04-02 15:49:01,765 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2023-04-02 15:49:01,765 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:49:01,765 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:49:01,765 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:49:01,765 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:49:01,777 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 15:49:02,006 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2023-04-02 15:49:02,016 INFO L197 IcfgInterpreter]: Interpreting procedure mulflt with input of size 28 for LOIs [2023-04-02 15:49:02,045 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-02 15:49:02,136 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 20 for LOIs [2023-04-02 15:49:02,215 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 15:49:02,218 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:49:03,790 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 [2023-04-02 15:49:03,790 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:49:03,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 15:49:03,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 14, 14] total 30 [2023-04-02 15:49:03,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758399482] [2023-04-02 15:49:03,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 15:49:03,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-04-02 15:49:03,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:49:03,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-04-02 15:49:03,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=2659, Unknown=0, NotChecked=0, Total=2862 [2023-04-02 15:49:03,793 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) [2023-04-02 15:49:04,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:49:04,458 INFO L93 Difference]: Finished difference Result 151 states and 189 transitions. [2023-04-02 15:49:04,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-02 15:49:04,458 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 [2023-04-02 15:49:04,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:49:04,459 INFO L225 Difference]: With dead ends: 151 [2023-04-02 15:49:04,459 INFO L226 Difference]: Without dead ends: 100 [2023-04-02 15:49:04,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 962 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=307, Invalid=3853, Unknown=0, NotChecked=0, Total=4160 [2023-04-02 15:49:04,461 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 [2023-04-02 15:49:04,461 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] [2023-04-02 15:49:04,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-04-02 15:49:04,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 75. [2023-04-02 15:49:04,474 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) [2023-04-02 15:49:04,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 89 transitions. [2023-04-02 15:49:04,475 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 89 transitions. Word has length 60 [2023-04-02 15:49:04,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:49:04,475 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 89 transitions. [2023-04-02 15:49:04,475 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) [2023-04-02 15:49:04,475 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 89 transitions. [2023-04-02 15:49:04,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-04-02 15:49:04,476 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:49:04,476 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] [2023-04-02 15:49:04,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-02 15:49:04,677 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 [2023-04-02 15:49:04,677 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:49:04,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:49:04,677 INFO L85 PathProgramCache]: Analyzing trace with hash -408357903, now seen corresponding path program 2 times [2023-04-02 15:49:04,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:49:04,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744350200] [2023-04-02 15:49:04,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:49:04,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:49:04,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:49:04,881 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-02 15:49:04,881 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:49:04,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744350200] [2023-04-02 15:49:04,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744350200] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:49:04,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932131268] [2023-04-02 15:49:04,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 15:49:04,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:49:04,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:49:04,883 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) [2023-04-02 15:49:04,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-02 15:49:05,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-02 15:49:05,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 15:49:05,042 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 56 conjunts are in the unsatisfiable core [2023-04-02 15:49:05,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:49:06,352 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-04-02 15:49:06,352 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:49:46,937 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-02 15:49:46,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932131268] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:49:46,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1870234759] [2023-04-02 15:49:46,939 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2023-04-02 15:49:46,939 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:49:46,940 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:49:46,940 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:49:46,940 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:49:46,954 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-02 15:49:47,160 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2023-04-02 15:49:47,168 INFO L197 IcfgInterpreter]: Interpreting procedure mulflt with input of size 28 for LOIs [2023-04-02 15:49:47,193 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-04-02 15:49:47,253 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 20 for LOIs [2023-04-02 15:49:47,315 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 15:49:47,317 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:49:50,035 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5511#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 15:49:50,035 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:49:50,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 15:49:50,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 25, 18] total 46 [2023-04-02 15:49:50,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650403318] [2023-04-02 15:49:50,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 15:49:50,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-04-02 15:49:50,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:49:50,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-04-02 15:49:50,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=4516, Unknown=0, NotChecked=0, Total=4830 [2023-04-02 15:49:50,038 INFO L87 Difference]: Start difference. First operand 75 states and 89 transitions. Second operand has 46 states, 35 states have (on average 2.5428571428571427) internal successors, (89), 39 states have internal predecessors, (89), 9 states have call successors, (17), 2 states have call predecessors, (17), 9 states have return successors, (16), 12 states have call predecessors, (16), 9 states have call successors, (16) [2023-04-02 15:49:57,253 WARN L223 SmtUtils]: Spent 6.55s on a formula simplification that was a NOOP. DAG size: 96 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 15:49:59,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-04-02 15:50:13,454 WARN L223 SmtUtils]: Spent 6.18s on a formula simplification that was a NOOP. DAG size: 104 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 15:50:19,875 WARN L223 SmtUtils]: Spent 6.19s on a formula simplification that was a NOOP. DAG size: 104 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 15:50:26,739 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-04-02 15:50:38,654 WARN L223 SmtUtils]: Spent 11.47s on a formula simplification that was a NOOP. DAG size: 155 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 15:50:58,158 WARN L223 SmtUtils]: Spent 18.94s on a formula simplification that was a NOOP. DAG size: 183 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 15:51:11,925 WARN L223 SmtUtils]: Spent 13.49s on a formula simplification that was a NOOP. DAG size: 145 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 15:51:24,268 WARN L223 SmtUtils]: Spent 12.07s on a formula simplification that was a NOOP. DAG size: 173 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)